CN118634381B

CN118634381B - Disposable drainage bags and disposable peritoneal dialysis drainage bags

Info

Publication number: CN118634381B
Application number: CN202411116927.1A
Authority: CN
Inventors: 丁谦明
Original assignee: Suzhou Dezhongfu Medical Instrument Co ltd
Current assignee: Suzhou Dezhongfu Medical Instrument Co ltd
Priority date: 2024-04-04
Filing date: 2024-08-15
Publication date: 2024-12-27
Anticipated expiration: 2044-08-15
Also published as: CN118304507A; CN118634381A; CN118304507B

Abstract

The invention discloses a disposable drainage bag and a disposable peritoneal dialysis drainage bag, which comprise a first bag body, a transmission assembly, a first transmission pipe, a second transmission pipe, a protective cap, a hoop sleeve and a peritoneal dialysis tee joint, wherein the peritoneal dialysis tee joint is provided with a dialysis luer joint, a liquid inlet joint and a liquid outlet joint, the protective cap is detachably covered on the dialysis luer joint, at least one joint of the liquid inlet joint and the liquid outlet joint is provided with a reducing section and an expansion section, an annular interface of the reducing section and the expansion section forms a connection step, the connection step is fixedly sleeved inside a pipe end of a butt joint transmission pipe, the hoop sleeve is fixedly sleeved outside the pipe end of the transmission pipe, the transmission pipe and the corresponding joint are in non-adhesive sealing fit, and the peritoneal dialysis tee joint with the dialysis luer joint, the liquid inlet joint and the liquid outlet joint is of an injection molding integrated structure.

Description

Disposable drainage bag and disposable peritoneal dialysis drainage bag

Technical Field

The application relates to the field of medical supplies, in particular to a disposable drainage bag and a disposable peritoneal dialysis drainage bag.

Background

Peritoneal dialysis is to fill a prepared dialysate into a peritoneal cavity of a patient regularly and regularly through a catheter by utilizing the characteristic that the peritoneal membrane is used as a semi-permeable membrane, and due to the concentration gradient difference of solutes on the two sides of the peritoneal membrane, the solutes on the high concentration side move to the low concentration side (diffusion effect) and the water moves from the hypotonic side to the hypertonic side (permeation effect). The peritoneal dialysis solution is continuously replaced to achieve the purposes of removing metabolic products and toxic substances in the body and correcting water and electrolyte balance disturbance.

In the prior art, for Continuous Ambulatory Peritoneal Dialysis (CAPD), the patient himself can manually exchange the dialysis fluid, for example, 2 to 5 times per day. The luer tee joint matched with the peritoneal dialysis drainage bag is of a split type structure, so that the split type peritoneal dialysis drainage bag is required to be manufactured separately in the process, the whole manufacturing and assembling procedures of the peritoneal dialysis drainage bag are complex, manual butt joint assembly is usually adopted, the manufacturing efficiency is low, and the disposable medical consumable is affected by the increase of cost.

In addition, when the joint adopted by the waste liquid bag of the existing peritoneal dialysis is inserted into the bag end of the waste liquid bag for welding, the film layers on the upper side and the lower side of the joint pipe need to be in face-to-face joint and wrap the joint pipe in the butt joint process, at the moment, if the position accuracy of the joint pipe is insufficient or the accuracy of the welding head is reduced, the joint seam is formed at the position of the joint pipe near the joint when the two film layers are in butt joint, effective sealing cannot be formed, and defective products are generated. As a follow-up procedure, the joint tube of the existing waste liquid bag is bonded by glue solution when the PVC conduit is connected, the assembly procedure is also complex, manual operation is needed, the manufacturing efficiency is affected, and the manufacturing cost is restricted.

Disclosure of Invention

In view of the shortcomings of the current peritoneal dialysis drainage bag, an object of the present application is to provide a novel disposable drainage bag and a disposable peritoneal dialysis drainage bag, so as to simplify the assembly process and save the manufacturing cost.

In order to achieve the above purpose, the application adopts the following technical scheme:

a disposable peritoneal dialysis drainage bag comprising:

a first bag for collecting fluid expelled during peritoneal dialysis;

The transmission assembly comprises a first transmission pipe, a second transmission pipe, a protective cap, a ferrule and a peritoneal dialysis tee joint, wherein the peritoneal dialysis tee joint is provided with a reducing section and an expansion section;

The peritoneal dialysis three-way joint is provided with a dialysis luer joint, a liquid inlet joint and a liquid outlet joint, wherein the dialysis luer joint is used for connecting an abdominal transmission external pipe, the protective cap is detachably covered on the dialysis luer joint, one end of the first transmission pipe is fixedly communicated with the liquid inlet joint, the other end of the first transmission pipe is used for being communicated with a second bag body containing dialysis liquid medicine, and the second transmission pipe is fixedly communicated with the liquid outlet joint and the first bag body;

The device comprises a liquid inlet joint, a liquid outlet joint, a connecting step, a hoop sleeve, a connecting rod and a connecting rod, wherein at least one joint of the liquid inlet joint and the liquid outlet joint is provided with a reducing section and an expansion section, and an annular interface of the reducing section and the expansion section forms the connecting step;

Wherein, have dialysis luer joint, feed liquor connect and go out liquid connect peritoneal dialysis three way connection be injection molding integrated into one piece structure.

Preferably, the heat resistance of the material of the collar is better than that of the material of the peritoneal dialysis tee joint.

Preferably, the collar does not plastically deform under a temperature change in the range of-50 degrees celsius to 150 degrees celsius.

Preferably, the peritoneal dialysis tee joint is made of TPEE, the first transmission pipe and the second transmission pipe are made of TPE, and the material of the ferrule is one of ABS, PC, TPEE, PS, aluminum, copper, silica gel and rubber.

Preferably, the collar spans the connection step, one end of the collar is sleeved outside the diameter-reducing section, the other end of the collar is sleeved outside the expansion section, and the collar is provided with a diameter-changing part at a position corresponding to the connection step.

Preferably, the sleeve is a silica gel sleeve, and the wall thickness of the silica gel sleeve is more than 0.8mm and less than 1.5 mm.

Preferably, the inner diameter of the silica gel sleeve in the natural state of non-sleeve is smaller than the inner diameter of the non-sleeve section of the transmission pipe.

Preferably, the inner diameter of the silica gel sleeve in the natural state of non-sleeve is different from the inner diameter of the non-sleeve section of the transmission pipe by 0.1mm to 0.8mm.

Preferably, the length of the silica gel sleeve arranged on the expansion section is more than one sixth of the length of the expansion section.

A disposable drainage bag comprises a first bag body, a transmission catheter and a collar;

The first bag body comprises a liquid storage bag with a bag connecting end and a drainage bag connector fixedly connected with the bag connecting end;

the drainage bag connector is of an injection molding integrated structure and is provided with a first connecting end and a second connecting end along the length direction of the drainage bag connector, wherein the first connecting end is used for fixedly connecting a liquid storage bag;

The second connecting end is provided with a diameter reducing part and an expansion part, the diameter reducing part is positioned on one side of the expansion part, which is close to the first connecting end, an annular interface of the diameter reducing part and the expansion part forms a vertical surface step, the vertical surface step is fixedly sleeved inside the pipe end of the transmission pipe, the hoop sleeve is fixedly sleeved outside the pipe end of the transmission pipe, and the transmission pipe and the second connecting end are in non-adhesive sealing fit.

Preferably, a stop structure is fixedly arranged outside the diameter-reducing part, and the pipe end of the transmission pipe is sleeved outside the second connecting end and does not exceed the stop structure.

Preferably, the stop structure comprises a stop ring integrally injection molded with the drainage bag connector.

Preferably, the drainage bag connector is made of PP material, and the transmission conduit is made of TPE material.

Advantageous effects

In the invention, the peritoneal dialysis tee joint is of an integral structure, not of a split structure, so that the integral peritoneal dialysis tee joint with the dialysis luer joint, the liquid inlet joint and the liquid outlet joint is of an injection molding integral structure, further split and separate manufacturing and assembly are not needed, the manufacturing efficiency can be improved, and the peritoneal dialysis tee joint has no split connection part and has higher self structural strength.

The injection molding time of the peritoneal dialysis tee joint adopting the structure of the embodiment is 4/15 seconds, the original PVC tee joint structure is inserted on the dialysis luer joint, and then the manufacturing process of high-frequency welding is carried out, and one peritoneal dialysis tee joint is assembled for about 1/7 seconds, so that the peritoneal dialysis drainage bag greatly improves the manufacturing efficiency, saves the manufacturing cost, can reduce the procedures of manual assembly and improves the manufacturing level of the process.

According to the invention, the disposable drainage bag can be kept in sealing fit with the transmission catheter through the collar after high-temperature sterilization, so that the disconnection is avoided on the basis of keeping the sealing, and the anti-drop performance of the structure is improved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of a disposable peritoneal dialysis set according to one embodiment of the present invention;

FIG. 2 is a schematic view of the first bag of FIG. 1;

FIG. 3 is a schematic view of the connector of the drainage bag in FIG. 2;

FIG. 4 is a cross-sectional view, A-A, and a partial enlarged view of FIG. 3;

FIG. 5 is a schematic view providing six different cross-sectional shapes of the connecting sheet of FIG. 4;

FIG. 6 is a schematic view of the structure of the junction of the drainage bag of FIG. 2 providing 4 different shapes;

FIG. 7 is a schematic cross-sectional view of the attachment tab and the bag port film layer of FIG. 3;

FIG. 8 is a schematic diagram showing a comparison of the cross-section of the connecting sheet before and after welding with the bag port film layer;

FIG. 9 is a schematic cross-sectional view of the connection of the drainage bag connector of FIG. 1 to a second transfer tube;

FIG. 10 is a schematic cross-sectional view of a connection between a drainage bag connector and a second transfer tube according to another embodiment of the present invention;

FIG. 11 is a perspective view of the peritoneal dialysis tee of FIG. 1;

FIG. 12 is another view of FIG. 11;

FIG. 13 is a front view of FIG. 12;

FIG. 14 is an elevation view of a peritoneal dialysis tee joint according to another embodiment of the present invention;

FIG. 15 is a schematic view of a connection between a transmission pipe and a joint according to another embodiment of the present invention;

FIG. 16 is an elevation view of a peritoneal dialysis tee joint according to another embodiment of the present invention;

FIG. 17 is a front view of a peritoneal dialysis tee joint according to another embodiment of the present invention;

FIG. 18 is a schematic view of a disposable drainage bag according to another embodiment of the present application;

FIG. 19 is a schematic view of a disposable drainage bag according to another embodiment of the present application;

FIG. 20 is a perspective view of the drainage bag adapter of FIG. 19;

FIG. 21 is a schematic view of a disposable drainage bag according to another embodiment of the present application;

FIG. 22 is a schematic view of the drainage bag adapter of FIG. 21;

FIG. 23 is a perspective view of the connector of FIG. 21;

FIG. 24 is a front elevational view of the connection fitting of another embodiment;

FIG. 25 is a schematic view of the connection fitting of FIG. 23 connected to a transfer tube;

FIG. 26 is a schematic view of a connection joint in another embodiment;

FIG. 27 is a front view of the structure of a connection joint in another embodiment;

FIG. 28 is a front view of the structure of a connection joint in another embodiment;

FIG. 29 is a front view of the structure of a connection joint in another embodiment;

FIG. 30 is a schematic illustration of the connection of a drainage bag connector to a transfer tube catheter provided in accordance with another embodiment;

FIG. 31 is a front view of a connection joint according to another embodiment;

FIG. 32 is a front view of a connection joint according to another embodiment;

FIG. 33 is a front view of a connection joint according to another embodiment;

FIG. 34 is a schematic illustration of the connection fitting of FIG. 31 to a delivery tube catheter;

FIG. 35 is a schematic view of a drainage bag connector according to another embodiment of the present application;

FIG. 36 is a schematic view of a peritoneal dialysis tee connected to a transfer line by a cuff according to another embodiment of the present application;

FIG. 37 is a schematic view of a portion of a peritoneal dialysis tee connected to a transfer line by a cuff according to another embodiment of the present application;

FIG. 38 is an enlarged view of a portion of FIG. 37;

FIG. 39 is a schematic view of a portion of a peritoneal dialysis tee connected to a transfer line by a cuff in accordance with another embodiment of the present application;

FIG. 40 is a schematic view of a portion of a peritoneal dialysis tee connected to a transfer line by a cuff according to another embodiment of the present application;

FIG. 41 is a schematic view of a portion of a peritoneal dialysis tee connected to a transfer line by a cuff in accordance with another embodiment of the present application;

fig. 42-44 are schematic structural views of a disposable drainage bag according to other embodiments of the present application, which is configured to cooperate with different cuffs.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 17 and 20, one embodiment of the present application provides a disposable drainage bag, specifically a disposable peritoneal dialysis drainage bag, comprising a first bag body 6, a transfer assembly 50. Wherein the first bag 6 is used for collecting fluid discharged during peritoneal dialysis. Specifically, the first bag 6 can be used as a waste liquid bag, and can collect waste liquid or body fluid discharged from the abdominal cavity of the human body to the outside during peritoneal dialysis.

Of course, in other embodiments, a disposable drainage bag as shown in fig. 18 and 19 may be provided for draining urine, wound drainage liquid, oozing blood or effusion, wherein the liquid storage bag 6 may also be called a waste liquid bag, and the drainage bag is in an empty bag flat state before use and drains the drainage liquid into the liquid storage bag 6 for storage during use.

As shown in fig. 1, the transfer set 50 includes a first transfer tube 3, a second transfer tube 4, a protective cap 8, and a peritoneal dialysis tee 10. As shown in fig. 2 to 8, the peritoneal dialysis tee 10 has a dialysis luer 15, a fluid inlet 12, and a fluid outlet 11. The protective cap 8 is detachably closed on the dialysis luer fitting 15. The protective cap 8 is a flexible protective cap 8 made of non-PVC material, and is covered on the dialysis luer connector 15, so that the dialysis luer connector 15 is prevented from being polluted. The protective cap 8 is provided with a pull ring by which a user can pull the protective cap 8 off the peritoneal dialysis tee 10. The dialysis luer fitting 15 is used for connecting an peritoneal dialysis extension tube (peritoneal dialysis extension tube). An external peritoneal dialysis tube is used to connect the transfer set 50 to the peritoneal catheter outside the body, preventing or allowing the flow of peritoneal dialysis solution or waste solution. The peritoneal dialysis extension tube is connected with the dialysis luer fitting 15 in a male-female luer fitting manner.

The disposable peritoneal dialysis drainage bag can form a peritoneal dialysis set with the second bag body 20. The second bag 20 is a solution bag, which may also be referred to as a drug solution bag, and contains an abdomen-penetrating drug solution therein, and has a rectangular bag structure as a whole. The second bag body 20 is provided with a second bag connecting end 25, and the first transmission pipe 3 of the disposable peritoneal dialysis drainage bag of the embodiment is communicated with the second bag connecting end 25.

In this embodiment, the transfer tubes (the first transfer tube 3 and the second transfer tube 4) of the disposable peritoneal dialysis drainage bag are made of non-PVC materials. Specifically, the first transfer tube 3 and the second transfer tube 4 are transfer tubes, and are also transfer hoses. One end of the first transmission pipe 3 is fixedly communicated with the liquid inlet joint 12, and the other end is communicated with a second bag body 20 containing dialysis liquid medicine. The second transmission pipe 4 is fixedly communicated with the liquid outlet joint 11 and the first bag body 6. The material of the transmission pipe comprises a matrix material and an elastic material, wherein the weight percentage of the matrix material and the elastic material is more than 50%, and the matrix material is PP or PE.

As shown in fig. 1 and 2, the first bag body 6 includes a liquid storage bag and a drainage bag connector 5 fixedly connected to one end of the liquid storage bag. The end of the liquid storage bag connected with the drainage bag joint 5 is a bag connecting end 61. The drainage bag joint 5 is of an injection molding integrated structure. The drainage bag joint 5 is made of non-PVC materials. The material of the drainage bag joint 5 can be similar to or the same as that of the peritoneal dialysis tee joint 10. Specifically, the material of the drainage bag connector 5 includes a base material and an elastic material. The base material and the elastic material are main component materials of the drainage bag joint 5, the weight percentage of the base material and the elastic material is more than 50%, and the base material is PP or PE. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS. Specifically, the drainage bag joint is made of PP material.

In this embodiment, the drainage bag connector 5 is attached at a centered position on the bag attachment end 61. The first bag body 6 has a bag attachment end 61 welded to the second attachment end 502. The drainage bag joint 5 is fixedly connected with the second transmission pipe 4. The pipe end of the second transmission pipe 4 is sleeved outside the drainage bag joint 5 in a non-adhesive fit mode. The fixed connection mode of non-adhesive bonding can adopt machinery to push the pipe end out of the joint in a cold way, so that manual pushing and glue smearing are not needed, and the manufacturing efficiency is improved.

Through verification, the existing manual glue smearing and pushing manufacturing mode has the approximate efficiency of manufacturing 2500 pieces every 8 hours by a single person, and the mechanical automatic cold insertion manufacturing mode of the embodiment is adopted, more than 9000 pieces can be manufactured every 8 hours by the single person, the connection efficiency of the joint and the transmission conduit is improved to more than 3 times, and the manufacturing efficiency can be remarkably improved.

As shown in fig. 3 to 6, the drainage bag connector 5 extends in the length direction H thereof, and the drainage bag connector 5 has a second connection end 502 to which the second transfer tube 4 is connected and a first connection end 501 to which the first bag body 6 is connected. The main materials of the drainage bag joint 5 and the second transmission pipe 4 in the embodiment are the same, so that the joint sealing structure can be formed due to the fact that the materials are similar after the drainage bag joint and the second transmission pipe are jointed in the connection state, and connection leakage is avoided. The second connection end 502 is provided with at least one elevation step 54 facing the first connection end 501. The elevation step 54 is fixedly sleeved inside the second transmission pipe 4.

As shown in fig. 3, the second connecting end 502 is provided with a reduced diameter portion 56 and an expanded portion 55. The diameter-reduced portion 56 is located on one side of the expansion portion 55 near the first connecting end 501, and the annular interface between the diameter-reduced portion 56 and the expansion portion 55 forms a vertical surface step 54. As shown in fig. 9 and 10, the tube end 41 of the second transmission tube 4 is non-adhesively attached to the outside of the second connecting end 502 of the drainage bag connector 5 by means of the structure of the elevation step 54, the reduced diameter portion 56 and the expansion portion 55. Wherein the outer diameter of the reduced diameter portion 56 is larger than the inner diameter of the second transfer tube 4. Further, when the first sleeve portion 412 corresponding to the reduced diameter portion 56 is retracted, the pipe end 41 of the second transmission pipe 4 is still in a state of being expanded by the reduced diameter portion 56, and is in close contact (non-adhesive contact) with the outer wall of the reduced diameter portion 56, thereby improving the connection strength and ensuring the sealing performance.

Specifically, the width of the elevation step 54 is 1-20 mm. By means of the elevation step 54, a hooking structure can be formed for the pipe end 41 of the second transfer pipe 4. The second transmission pipe 4 is contracted and reduced under the condition of elastic recovery of the second transmission pipe through the elevation step 54, and then the elevation step 54 hooks the second transmission pipe 4 to form a stop for the second transmission pipe 4, as shown in fig. 9 and 10, and the stability of connection is ensured by forming a physical hooking structure on the basis of the close connection of the two.

The outer edge of the end of the drainage bag connector 5 is also provided with a tip chamfer 551 to reduce the outer diameter of the end to be smaller than the inner diameter of the second transmission pipe 4, and the diameter of the port of the tip chamfer 551 is smaller than the inner diameter of the second transmission pipe 4. Thus, the end of the drainage bag connector 5 is conveniently inserted into the pipe end 41 of the second transmission pipe 4 by means of the end chamfer 551 when the drainage bag connector is pushed in by extrusion, and the pipe end 41 of the second transmission pipe 4 is gradually pushed in to expand. Of course, the expansion 55 located outermost (lowest when facing fig. 3) is preferably of conical configuration to facilitate the expansion of the tube end 41 of the second transfer tube 4 by squeezing in.

The connection length between the pipe end 41 of the second transmission pipe 4 and the second connection end 502 is greater than the length of the expansion portion 55, and specifically, the connection length between the pipe end 41 of the second transmission pipe 4 and the second connection end 502 is 5 mm-30 mm. When the second transfer tube 4 is connected to the drainage bag connector 5, the expansion portion 55 is fitted into the tube end 41 of the second transfer tube 4. The pipe end 41 of the second transfer pipe 4 is connected to the first connection end 501 by cold insertion.

As shown in fig. 9, the pipe end 41 of the second transmission pipe 4 mainly includes a first sleeve portion 412 sleeved outside the reduced diameter portion 56 and a second sleeve portion 411 sleeved on the expansion portion 55, wherein the inner diameter of the first sleeve portion 412 is larger than the inner diameter of the second transmission pipe 4 (non-pipe end portion), that is, the first sleeve portion 412 is still in a state of being enlarged and expanded by the reduced diameter portion 56, so as to ensure that the first sleeve portion and the second sleeve portion are tightly sealed. The second sleeve 411 is sleeved outside the expansion part 55 and is tightly attached to the outer wall of the expansion part 55.

In order to form an effective physical hooking structure, the length of the diameter-reducing portion 56 is more than one third of the inner diameter of the second transmission pipe 4, that is, L is equal to or greater than D/3, L is the length of the diameter-reducing portion 56, and D is the inner diameter of the second transmission pipe 4 (in an unjacketed natural state). For example, when the inner diameter of the second transfer tube 4 is 6m, the length of the reduced diameter portion 56 is 2mm or more.

The expansion 55 is of cylindrical or conical configuration. As shown in fig. 10, the drainage bag connector 5 may have a plurality of vertical steps 54 thereon to form a multi-stage hooking structure, so as to ensure the connection strength between the second transmission pipe 4 and the corresponding drainage bag connector 5. Further, 1,2, or 3 expansion portions 55 are provided, and 1,2, or 3 reduction portions 56 are provided. In the embodiment shown in fig. 10, the two vertical steps 54 (54 a, 54 b), the expansion portions 55 (55 a, 55 b) and the diameter-reduced portions 56 (56 a, 56 b) are all provided, and the second transfer pipe 4 is sleeved on the vertical steps 54 (54 a, 54 b), the expansion portions 55 (55 a, 55 b) and the diameter-reduced portions 56 (56 a, 56 b) to form a secondary hooking structure.

In the existing connection process lacking the wing structure 52, seam gaps are easily generated when two bag mouth membrane layers 611 are butted at two sides of the joint of the single tube body, particularly, the butt joint position of the bag mouth membrane layers 611 is caused, and higher reject ratio is further caused, so that the welding position of the joint of the single tube body structure is required to be very accurate, the generation of the seam gaps is avoided, and the two bag mouth membrane layers 611 and the single tube body form a complete circular sealing structure.

As shown in fig. 1, 3, 7 and 8, the drainage bag connector 5 includes a body tube 51 and a wing structure 52 provided on a side wall of the body tube 51. The wing structure 52 is integrally provided on the body tube 51, which is injection molded integrally with the body tube 51. The pouch connection end 61 has a pouch mouth film 611 oppositely attached. The body tube 51 and the wing structure 52 are fixedly sandwiched between two pocket film layers 611a, 611 b. The wing structure 52 is tiled between two pocket film layers 611a, 611 b. The wing structure 52 extends in a radial direction. The wing structure is tiled between the two bag mouth film layers 611 so that the two bag mouth film layers 611 are distributed on two sides of the wing structure 52 in a mirror symmetry mode, and further the welding sealing quality is ensured.

In order to form a better connection quality, the connecting sheet 521 has two opposite welding planes 527, and when the wing structure 52 is tiled between the two bag mouth film layers 611a and 611b, the bag mouth film layer 611 can be directly attached to the welding planes 527, and the two welding planes are melted under welding to form a connection welding seam. The attachment tab 521 provides a welding surface 527 rather than a rugged welding surface, which accommodates the tab characteristics of the attachment tab 521 itself, which itself can be integrally fused to the bag port film 611 directly by bonding during welding, and which is easy to manufacture. The bonding plane 527 may be a diagonal plane as shown in fig. 5 or a vertical plane as shown in fig. 5.

The bag connection end 61 and the first connection end 501 of the drainage bag connector 5 may be welded by using power frequency pulse (may also be referred to as power frequency heating welding). By means of the wing structure 52, the drainage bag connector 5 is located between the two bag mouth film layers 611 and then welded once, so that the sealing of the first bag body 6 and the fixed connection of the first bag body 6 and the drainage bag connector 5 can be achieved, and the sealing strip 65 for sealing the bag connecting end 61 is formed through welding.

As shown in fig. 7 and 8, the wing structure 52 is partially melted and combined with the film layer into a whole during welding, and thus the wing structure 52 has a fusion portion 525 fused with the pouch mouth film layer 611. The wing structure 52 (the connection sheet 5211 in fig. 8) in the state of being connected to the first bag 6 is reduced in area or radial length as compared with the wing structure 52 (the connection sheet 5212 in fig. 8) in the state of being not connected to the first bag 6. In the welding process, the wing structure 52 can lose part of the area, and the part of the lost area of the wing structure 52 and the bag mouth film 611 are fused to form an integrated structure, so that the connection area of the first bag body 6 and the drainage bag connector 5 is integrally improved, the bonding strength of the first bag body and the drainage bag connector 5 is ensured, the connection stability of the drainage bag connector 5 and the first bag body 6 is ensured, and the problem of falling off is avoided. In this case, it is schematically shown in fig. 8 that the connecting webs 5211 remaining after soldering have a reduced area or radial length compared to the connecting webs 5212 in the unconnected state.

In the drainage bag connector 5 of the present embodiment, by providing the wing structure 52, the two bag mouth film layers 611a and 611b cover the body tube 51 and span the body tube 51, and cover the wing structure 52 on both sides of the body tube 51, even if a butt joint gap exists between the two bag mouth film layers 611a and 611b, the existence of the wing structure 52 can fill the corresponding butt joint gap. Of course, more because of the wing structure 52, the two bag mouth film layers 611 are not required to be closely butted at one side of the body pipe 51, and only need to keep the two film layers closely clung to the surface of the wing structure 52 for welding, so that the requirement on the butted position of the whole drainage bag joint 5 is lower, higher yield can be obtained, and correspondingly, the welding sealing quality is higher.

In this embodiment, the wing structure 52 includes connection sheets 521 (521 a, 521 b) distributed on both sides of the main body pipe 51, and the connection sheets 521 have a sheet structure. In the unassembled state, the connection tabs 521a, 521b are symmetrically distributed on both sides of the body tube 51. The thickness of the connecting sheet 521 is 0.01-1.5 mm, and the length in the radial direction is 1-10 mm. The length L1 of the connecting sheet 521 along the length direction H of the main body pipe is1 to 10mm, and preferably, the length L1 is 3 to 8mm. The number of the connection sheets 521 may be 2 or more, and they may be symmetrically distributed. The body tube 51 is provided with two or more wing structures 52 along the length direction H thereof. Preferably, the connecting tab 521 of both wing structures 52 has the same shape. The connecting sheet 521 has an inner end connected to the body pipe 51 and an outer end distant from the body pipe 51, and the thickness of the connecting sheet 521 gradually decreases from the inner end to the outer end in order to fill the butt joint gap of the bag mouth film 611.

The shape of the attachment tab 521 is various. In this embodiment, the shape of the connection sheet (longitudinal section, section in the view shown in fig. 3) is rectangular. In other embodiments, such as a, b, c, d in fig. 6, the outer edge of the connecting sheet 521 may be serrated, and in this case, the outer end of the connecting sheet 521 is provided with protrusions and recesses staggered along the length direction H of the body pipe. The convex portions and the concave portions may be arranged at equal intervals or irregularly, and the convex portions and the concave portions may be identical or different, and preferably, the convex portions and the concave portions have identical shapes. Similarly, the cross-sectional shape of the connecting sheet 521 of the different wing structures 52 may be different, and as shown in fig. 5, the cross-section of the connecting sheet 521 may be a triangular spike shape, a rectangular shape, an irregular shape, or the like, which is not limited in any way.

Considering that if the smooth body tube is directly welded to the pouch connection end 61, the outer wall surface of a part of the body tube is melted to be fused with the pouch mouth film layer 611 of the pouch connection end 61 during welding, and the melted part of the body tube is easily overflowed to form undesired protruding foreign matters, the welding quality is affected inside the pouch mouth film layer 611, resulting in poor sealing.

As shown in fig. 3, to ensure the connection quality between the first connection end 501 and the bag connection end 61, the first connection end 501 is further provided with a connection convex ring 58 on the outer wall of the body tube 51, and the connection convex ring 58 protrudes from the outer wall surface of the body tube 51. The width W2 of the connecting convex ring 58 along the length direction H of the body tube is 0.5 mm-2 mm. The height of the outer wall surface of the protruding body tube 51 of the connection convex ring 58 is 0.05mm to 1mm. The connection collars 58 are disposed between the connection tabs 521 on both sides of the body pipe 51, and one end of the connection collars 58 continuously extends from one connection tab 521a to the other connection tab 521b. With the connecting tab 521 as a symmetrical interface, the connecting collars 58 are mirror-symmetrically disposed on either side of the connecting tab 521.

Specifically, the outer wall area of the body tube 51 corresponding to the wing structure 52 is a connection portion, and the length of the connection portion along the length direction H is equal to the length of the wing structure 52 along the length direction H, which is L1. Two or more connecting convex rings 58 are distributed on the connecting part along the length direction H in a arrayed manner, and the interval between two adjacent connecting convex rings 58 is 0.5 mm-2 mm. A filling groove is formed between two adjacent connecting collars 58. Of the plurality of connecting collars 58, one connecting collar 58 is aligned with one side edge of the connecting tab 521 and the other connecting collar 58 is aligned with the other side edge of the connecting tab 521. In the embodiment having a plurality of wing structures 52 on the body tube 51, as shown in fig. 3, two wing structures 52 (two pairs of connection tabs 521) are provided on the body tube 51, and correspondingly, two connection portions are provided on the body tube 51 to correspondingly provide the connection collars 58.

Through being equipped with the connection bulge loop 58 that the interval was arranged to form between connection bulge loop 58 and fill flat groove 585, and then in welded in-process connection bulge loop 58 is first melted and is flowed into filling flat groove 585 to the limit overflow, so be difficult to form protruding foreign matter and influence welding quality in the connecting portion, the connection bulge loop 58 highly reduces gradually under high temperature welding, gradually with overflow fill flat groove 585 flushes and constitutes flat joint surface, with sack rete 611 looks welding fusion, and then constitute the connection structure that welding quality is better, this kind of connection structure can reduce the welding precision requirement to drainage bag joint 5 and bonding tool, and provide the connection structure that the quality is better, reduce the manufacturing technology degree of difficulty.

As shown in fig. 2 and 3, the bag connecting end 61 is provided with at least one welding seam strip 570 for welding the bag mouth film layer 611 relatively, and the number of the wing structures 52 is equal to that of the welding seam strips 570 and aligned one by one in the width direction of the first bag body 6. The weld strip 570 extends continuously from one side of the first pouch 6 in width (in the left-right direction when facing fig. 1) to the other side and spans the drainage pouch joint 5. The bag connection end 61 is welded to the drainage bag connector 5 in one piece and forms the weld strip 570. The width W1 of the bead 570 in the longitudinal direction H of the body pipe 51 is equal to the length L1 of the connection piece 521, and of course, both are equal to the length of the connection portion in the longitudinal direction H.

On the disposable drainage bag, the connecting convex rings 58 are approximately flush with the filling grooves 585 after welding, so that a welding surface approximately flat with the bag mouth film layer is formed, and further, the welding seam strips 570 on the body tube 51 are continuous welding seams along the length direction H, and the interval welding seams are not formed by the connecting convex rings 58 arranged at intervals, so that a connecting structure with excellent sealing performance is formed on the small-size drainage bag connector 5. Similarly, the weld strip 570 on the connecting web is also a continuous weld along the length direction H.

Through further research by the inventor, when the drainage bag joint 5 with the wing structure is manufactured, the drainage bag joint needs to be kept in a flat state, defective products are easy to generate in a non-flat state, the requirement on the assembly level of manufacturing is high, and further the improvement of the manufacturing efficiency is not facilitated.

As shown in fig. 35, in order to overcome such problems, and in view of the small butt seam, the inventor considers that the joint is filled and plugged only by the melted flow filling effect of the connecting convex ring 58, so in this embodiment, the drainage bag joint 5 is not provided with a wing structure, only the connecting convex ring 58 is remained, in this case, an effective sealing connection can still be formed, and in addition, no tiling requirement is required for the drainage bag joint 5 in manufacturing, and thus the manufacturing efficiency can be effectively provided.

In this embodiment, at least one connection portion 580 may be provided on the outer wall of the body tube 51 of the drainage bag connector 5. The connecting portion 580 has two or more connecting collars 58 arranged in a length direction. The connection collar 58 protrudes from the outer wall surface 5011 of the body tube 51. A filling groove 585 is formed between two adjacent connecting collars 58, wherein the width of the filling groove 585 in the length direction (i.e., the width of the space between two adjacent connecting collars 58) is greater than the width of the connecting collars 58, and preferably, the width of the filling groove 585 in the length direction is greater than 2 times the width W2 of the connecting collars 58. The filling groove 585 is a circumferentially continuous annular groove extending continuously in the circumferential direction. Whereas the filling groove 585 is cut by the wing structure in the above embodiment having the wing structure, it is a discontinuous structure.

In the case that the wing structure is not provided in the drainage bag connector 5 of the present embodiment, the connection convex ring 58 melts and enters into the butt joint gap formed by the butt joint of the two film layers during welding, so that the drainage bag connector 5 and the bag connection end 61 are effectively and hermetically connected. The drainage bag joint 5 and the bag mouth membrane layer 611 are welded and fused, and a connecting structure with better welding quality can be formed by virtue of the connecting convex ring 58.

In this embodiment, the width of the connecting collar 58 itself is reduced so that the connecting collar 58 is more easily melted by welding into the filling groove 585, forming a flat welding surface. The width W2 of the connecting collar 58 along the length direction H of the body tube 51 is 0.1 mm-1 mm. Preferably, the width W2 of the connecting collar 58 along the length direction H of the body tube is 0.1mm to 0.5mm. The height of the outer wall 5011 of the protruding body tube 51 of the connection collar 58 is 0.05mm to 1mm. The bottom wall 581 of the filling groove 585 can be higher than the outer wall of the first connecting end 501, so that the influence of welding on the pipe wall thickness is avoided, and the structural quality after welding is ensured.

As shown in fig. 35, the first connection end 501 is provided with two spaced apart connection portions 580. The spacing distance W4 between two adjacent connecting portions 580 is greater than the width W3 of the connecting portion 580 in the length direction. Each connecting portion 580 is provided with 3-10 connecting collars 58. Each of the connection portions 580 is in one-to-one correspondence with the bead strip 570. The drainage bag connector 5 can be referred to by the same reference as the drainage bag connector of the previous embodiment, and the repeated parts are not repeated. In the embodiment as in fig. 42-44, two connections 80a, 580b correspond to two weld strips 570a, 570b, respectively.

The structure of luer tee joint that current peritoneal dialysis adopted is because need with outer joint many times plug threaded connection of peritoneal dialysis, in order to avoid the butt joint to form wearing and tearing or avoid wearing and tearing seriously, consequently it adopts PVC and TPEE to constitute luer tee joint's two parts respectively, carries out many times with outer joint of peritoneal dialysis through the joint of TPEE material on the one hand, reduces wearing and tearing and leakage, improves the life of outer joint of peritoneal dialysis, and on the other hand carries out reliable connection with transmission catheter through the joint of PVC material. In addition, the luer tee joint with the split structure is mature in materials and manufacturing processes (such as industrial frequency welding and bonding), and further forms a certain degree of obstruction to the formation of improved processes.

As shown in fig. 11 to 17, compared with the above conventional design, in the present embodiment, the peritoneal dialysis tee 10 is of an integral structure, not of a split structure, and the peritoneal dialysis tee 10 having the dialysis luer 15, the liquid inlet 12 and the liquid outlet 11 is of an integral injection molding structure, so that split manufacturing and assembly are not needed, the assembly process is simplified, the manufacturing efficiency is improved, and the peritoneal dialysis tee 10 has no split connection part, and has higher structural strength.

In the prior art, the whole manufacturing and assembling time of the split structure PVC tee joint is about 1/7 seconds after the split structure PVC tee joint is inserted into the dialysis luer joint and then subjected to high-frequency welding, and the injection molding time of the peritoneal dialysis tee joint 10 adopting the structure of the embodiment is 4/15 seconds, so that the manufacturing efficiency can be greatly improved, the manufacturing cost is further saved, the manual assembling process can be reduced, and the manufacturing level of the process is improved.

In this embodiment, the material of the dialysis luer connector 15 is the same as that of the liquid inlet connector 12 and the liquid outlet connector 11, and is non-PVC. Specifically, the material of the dialysis luer 15 comprises a matrix material and an elastic material, wherein the weight percentage of the matrix material and the elastic material is more than 50%, and the matrix material is PP or PE. Specifically, the dialysis luer fitting 15 is made of TPEE.

The material of the three-way joint 10 for peritoneal dialysis in this embodiment includes a base material and an elastic material, wherein the weight percentage of the base material and the elastic material is more than 50%, and the base material is PP, PE or TPEE. Further, the weight percentage of the matrix material and the elastic material may be between 50% and 97%. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS. Thus, the main materials of the peritoneal dialysis tee joint 10 and the transmission pipe in the embodiment are the matrix material and the elastic material, and the two materials are similar to form a bonding sealing structure after bonding, so that the peritoneal dialysis tee joint is convenient for connection and can avoid connection leakage. Specifically, the three-way joint 10 for peritoneal dialysis is made of TPEE.

Compared with the traditional PVC material, the peritoneal dialysis tee joint 10 or the transmission catheter material is more environment-friendly, and the PVC material pipe can generate toxic substances due to incineration, so that the degradation treatment can only be carried out by adopting a landfill method at present. However, the peritoneal dialysis tee 10 or the transfer catheter according to the embodiment of the present application can be incinerated, and harmful substances are not easily generated during the incineration process.

In the three-way peritoneal dialysis adapter 10, at least the dialysis luer 15 is made of a transparent material or a translucent material. Considering that the material of the whole peritoneal dialysis tee joint 10 is wholly consistent, the whole peritoneal dialysis tee joint 10 is made of transparent or semitransparent materials (similar to ground glass effect), and then the flowing condition of liquid can be observed through the peritoneal dialysis tee joint 10 in the peritoneal dialysis process, so that the operation of corresponding peritoneal dialysis external connection pipe is facilitated, the probability of misoperation is reduced, and the use experience is improved.

In this embodiment, the three-way peritoneal dialysis adapter 10 is a unitary structure that includes a main body tube section 13 extending in a longitudinal direction (length direction F1). The main pipe section 13 is a main body part of the peritoneal dialysis tee joint 10, and the dialysis luer joint 15, the liquid inlet joint 12 and the liquid outlet joint 11 are arranged on the main pipe section 13 to form the peritoneal dialysis tee joint 10 with a tee structure. The main pipe section 13, the dialysis luer connector 15, the liquid inlet connector 12 and the liquid outlet connector 11 are of an injection molding integrated structure.

As shown in fig. 11, 12, 13, and 14, a dialysis luer 15 is provided at one end of the main body section 13 in the longitudinal direction F1, and the liquid inlet 12 and the liquid outlet 11 are provided at the other end of the main body section 13. An end flange plate 16 is arranged at one end of the main pipe section 13, and the dialysis luer connector 15 is positioned at one side of the end flange plate 16 away from the main pipe section 13. The side wall of the main pipe section 13 is provided with a wing plate 14. The wing plates 14 are distributed on two sides of the main pipe section 13, so that the force applied by a user and the external abdominal tube can be assembled by relative rotation. The included angle between the liquid inlet joint 12 and the liquid outlet joint 11 is an acute angle or a right angle. Preferably, the included angle between the liquid inlet joint 12 and the liquid outlet joint 11 is set at an acute angle.

In this embodiment, the liquid outlet connector 11 is coaxially disposed with the main body pipe section 13, and is located on an extension line of the main body pipe section 13, and can form a same straight pipe section with the main body pipe section 13, similarly, the dialysis luer connector 15 is located at the other end of the main body pipe section 13, and the dialysis luer connector 15 and the liquid outlet connector 11 are respectively located at two ends of the main body pipe section 13, so as to form a coaxial straight pipe structure.

As shown in fig. 11-14, the dialysis luer fitting 15 includes an outer sleeve 150 and an inner fitting 17 coaxially located within the outer sleeve 150. The outer sleeve 150 and the inner fitting 17 are also of injection molded integrally formed construction and form a luer fitting construction. The dialysis luer fitting 15 is a female luer fitting, and is connected with a male luer fitting of an abdominal penetration extension tube in a matching manner.

Specifically, the outer sleeve 150 has an outer diameter larger than the outer diameter of the main pipe section 13, and includes a light wall section 151 and a connecting section 152 located on a side of the light wall section 151 near the main pipe section 13. The inner wall of the optical wall section 151 is a smooth wall surface, which is convenient for the male luer connector of the external abdominal tube to be inserted, and the connecting section 152 is positioned at the inner side of the optical wall section 151, the inner wall of the connecting section 152 is provided with threads, and the inner connector 17 is matched to form a luer structure, so that the luer structure is in threaded connection with the male luer connector of the external abdominal tube.

In order to facilitate connection with the outer tube, avoid the abrasion and damage to the outer tube caused by multiple connection, the outer tube sleeve 150 mainly comprises a base material and an elastic material, and has a certain elastic modulus. In order to adapt to the connection of the abdominal external connection tube, the thickness of the tube wall of the external tube sleeve 150 is 0.1-3 mm, and the hardness of the external tube sleeve 150 is 30-60 Shore D. The outer tube sleeve 150 with such hardness and tube wall thickness can reduce wear on the outer tube when connected with the outer tube, and ensure the service life of the outer tube.

Optionally, to improve sealing performance and avoid leakage, a sealing step 155 is further disposed in the outer sleeve 150. The sealing step 155 is located on the inner wall of the light wall section 151. In this way, the inner wall of the outer sleeve 150 forms a stepped bore configuration, and is abutted by the sealing step 155 with the corresponding structure of the male luer of the peritoneal dialysis extension tube to form a snug seal. Of course, the end of the connecting section 152 is also formed with an end step, the sealing step 155 being outside the end step (the side remote from the tapping fitting 11). The inner diameter of the connecting section 152 relative to the optical wall section 151 is reduced to a certain extent, so that the inner threads are formed on the connecting section 152 to avoid reducing the wall thickness of the connection and ensure the connection strength.

In this embodiment, the pipe end of the first transmission pipe 3 is non-adhesive sleeved outside the liquid inlet joint 12. The pipe end of the second transmission pipe 4 is sleeved outside the liquid outlet joint 11 in a non-adhesive fit mode. The ends of the transmission pipes are butt-jointed and extruded by cold pushing (in a non-heating state, for example, in a room temperature state), so that the ends of the transmission pipes are expanded, and then the liquid inlet joint 12 and the liquid outlet joint 11 are respectively inserted into the corresponding first transmission pipe 3 and the second transmission pipe 4. The pipe ends of the first transmission pipe 3 and the second transmission pipe 4 are clung to the outer walls of the liquid inlet joint 12 and the liquid outlet joint 11 sleeved inside by virtue of the elastic retraction performance of the first transmission pipe and the second transmission pipe, so that the sealing is formed.

The first transmission pipe 3, the second transmission pipe 4 of this embodiment are connected with the liquid inlet joint 12 and the liquid outlet joint 11, do not need to be heated to soften and then be inserted in a butt joint way, and then the first transmission pipe 3, the second transmission pipe 4, the liquid inlet joint 12 and the liquid outlet joint 11 of this embodiment are in non-adhesive bonding, and the heated pipe ends and the joints can form certain bonding after bonding. The fixed connection mode of non-adhesive bonding can adopt machinery to push the pipe end cold into the outside of the joint, and manual pushing is not needed, so that the manufacturing efficiency is improved.

The pipe ends of the first transmission pipe 3 and the second transmission pipe 4 are sleeved on the liquid inlet joint 12 and the liquid outlet joint 11 by deformation, and the deformation mainly comprises elastic deformation. Of course, the ends of the first transfer tube 3 and the second transfer tube 4 may be deformed plastically to some extent, which is not limited in this regard. After the first transfer tube 3 or the second transfer tube 4 is pulled out from the liquid inlet joint 12 or the liquid outlet joint 11, the tube ends of the first transfer tube 3 or the second transfer tube 4 can recover the shape to a certain extent.

As shown in fig. 14 to 17, in order to enhance the connection strength between the first and second transfer pipes 3 and 4 and the corresponding liquid inlet and outlet joints 12 and 11, at least one of the liquid inlet and outlet joints 12 and 11 is provided with at least one connection step 113 facing the main pipe section 13. The connection step 113 is fixedly sleeved inside the transmission pipe. The width of the connecting step 113 is 1-20 mm.

By the connection step 113, a hooking structure can be formed to the pipe end of the transfer pipe. The transmission pipe (the first transmission pipe 3 or the second transmission pipe 4) is contracted and reduced under the condition of elastic recovery of the transmission pipe through the connection step 113, then the transmission pipe is hooked by the connection step 113, the transmission pipe is stopped, as shown in fig. 15, and the stability of connection is ensured by forming a physical hooking structure on the basis of the tight connection of the transmission pipe and the transmission pipe. The outer edges of the ends of the liquid inlet joint 12 and the liquid outlet joint 11 are provided with chamfer ends 119 so as to reduce the outer diameter of the ends to be smaller than the inner diameter of the transmission pipes (the first transmission pipe 3 and the second transmission pipe 4), and the diameter of the port of the chamfer ends 119 is smaller than the inner diameter of the transmission pipes (the first transmission pipe 3 and the second transmission pipe 4). Thus, when the extrusion is pushed in, the ends of the liquid inlet joint 12 and the liquid outlet joint 11 are conveniently inserted into the pipe end of the transmission pipe, and the pipe end of the transmission pipe is gradually pushed in to be expanded. Of course, the outermost (lowermost when facing fig. 4) expansion section 111 may be tapered to facilitate the expansion of the tube end of the transfer tube by squeezing in.

Specifically, at least one of the liquid inlet joint 12 and the liquid outlet joint 11 is provided with a reducing section 112 and an expansion section 111. The annular interface of the reduced diameter section 112 and the expanded section 111 forms the connecting step 113. The reduced diameter section 112 is located on the side of the expansion section 111 adjacent to the main pipe section 13. The outer diameter of the diameter-reduced section 112 is larger than the inner diameter of any one of the first transfer pipe 3 and the second transfer pipe 4. Furthermore, when the first portion 36 corresponding to the reduced diameter section 112 is retracted, the pipe end of the transmission pipe is still in a state of being expanded by the reduced diameter section 112, and is tightly attached (non-adhesive attached) to the outer wall of the reduced diameter section 112, so that the connection strength is improved and the sealing performance is ensured.

As shown in fig. 15, the pipe end of the transmission pipe mainly includes a first portion 36 sleeved outside the reduced diameter section 112 and a second portion 35 sleeved outside the expansion section 111, wherein the inner diameter of the first portion 36 is larger than the inner diameter of the transmission pipe (non-pipe end portion), that is, the first portion 36 is still in a state of being enlarged and expanded by the reduced diameter section 112, so as to ensure that the first portion and the second portion are tightly sealed. The second portion 35 is sleeved outside the expansion section and is tightly attached to the outer wall of the expansion section.

In order to form an effective physical hooking structure, the length of the diameter-reducing section 112 is more than one third of the inner diameter of the first transmission pipe 3 or the second transmission pipe 4, that is, L is equal to or greater than D/3, L is the length of the diameter-reducing section 112, and D is the inner diameter of the first transmission pipe 3 or the second transmission pipe 4. For example, when the inner diameter of the first transfer tube 3 is 6m, the length of the reduced diameter section 112 is 2mm or more.

The expansion section 111 is of cylindrical or conical configuration. As shown in fig. 16 and 17, each of the liquid inlet joint 12 and the liquid outlet joint 11 may have a plurality of connection steps 113 to form a multi-stage physical hooking structure instead of a chemical connection manner, so as to ensure the connection strength between the first and second transmission pipes 3 and 4 and the corresponding liquid inlet joints 12 and 11. Accordingly, the expansion section 111 (111 a, 111 b), the reduction section 112 (112 a, 112 b), and the connection step 113 (113 a, 113 b) may be provided in plurality. Preferably, the expansion section 111 is provided with 1,2, or 3, and the diameter-reducing section 112 is provided with 1,2, or 3.

Of course, the structure of the second connection end 502 and the structure of the liquid inlet connector 12 or the liquid outlet connector 11 in the above embodiment can be combined with each other in a reference manner, and the connection manner of the drainage bag connector 5 and the second transmission tube 4 can be combined with each other in a reference manner, and the connection manner of the liquid inlet connector 12 or the liquid outlet connector 11 and the first transmission tube 3 or the second transmission tube 4 can be combined with each other in a reference manner, and the description of the reduced diameter portion 56 and the reduced diameter section 112, and the expansion portion 55 and the expansion section 111 can be combined with each other in a reference manner.

As shown in fig. 1 to 20, in the embodiment of the present application, there is further provided a drainage bag connector 5, where the drainage bag connector 5 is an injection molded structure, and has a first connection end 501 and a second connection end 502 along a length direction thereof, and the second connection end 502 is used for fixedly connecting with the transmission catheter 30. The first connecting end 501 is used for fixedly connecting the liquid storage bag 6.

The first connection end 501 comprises a body tube 51 extending longitudinally and a wing structure 52 integrally arranged on the outer side wall of the body tube 51, the wing structure 52 comprises connection sheets 521 symmetrically arranged on two sides of the body tube 51, and the connection sheets 521 are provided with two opposite welding planes 527. The longitudinal extension direction is the length direction of the drainage bag joint 5.

The drainage bag connector 5 can be used for manufacturing a disposable drainage bag. The disposable drainage bag is used for draining urine, wound drainage liquid, blood seepage or effusion, the liquid storage bag 6 can be called a waste liquid bag, the bag is in a flat state before use, and the drainage liquid is drained into the liquid storage bag 6 for storage when in use.

The application also provides a disposable drainage bag as shown in fig. 18 and 19, which comprises a liquid storage bag 6, a drainage bag joint 5 and a transmission catheter 30. Wherein the reservoir bag 6 is used for collecting the drained drainage liquid. The first connecting end 501 of the drainage bag connector 5 is fixedly connected with the liquid storage bag 6, one end of the transmission conduit 30 is connected with the connecting connector 10, and the other end is fixedly sleeved outside the second connecting end 502 of the drainage bag connector 5.

The connector 10 comprises a luer, either a female luer as shown in fig. 1 or a male luer as shown in fig. 2. As shown in fig. 1, the connection joint is also detachably covered with a protective cap 8. The protective cap 8 is removably fitted over said dialysis luer fitting 15. The protective cap 8 is a flexible protective cap 8 made of non-PVC material, and is covered on the dialysis luer connector 15, so that the connection connector is prevented from being polluted. The protective cap 8 is provided with a pull ring by means of which a user can pull the protective cap 8 off the connection joint 10. The connection fitting 10 may be used to connect drainage tubes.

In this embodiment, the transmission conduit 30 is made of non-PVC material, and may further have a liquid stop clip 40 thereon. Specifically, the material of the transmission catheter 30 includes a matrix material and an elastic material, where the weight percentage of the matrix material and the elastic material is above 50%, and the matrix material is PP or PE. Wherein, the transmission conduit 30 is made of TPE material.

As shown in fig. 1 and 2, the disposable drainage bag comprises a liquid storage bag 6 and a drainage bag joint 5 fixedly connected to one end of the liquid storage bag 6. The end of the liquid storage bag 6 connected with the drainage bag joint 5 is a bag connecting end 61. The drainage bag joint 5 is of an injection molding integrated structure. The drainage bag joint 5 is made of non-PVC materials. The material of the drainage bag joint 5 comprises a matrix material and an elastic material. The base material and the elastic material are main component materials of the drainage bag joint 5, the weight percentage of the base material and the elastic material is more than 50%, and the base material is PP or PE. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS.

As shown in fig. 21 to 27, in one embodiment of the present application, there is further provided a drainage bag connector 5, wherein the drainage bag connector 5 is an injection-molded integrated structure, and has a first connection end and a second connection end along a length direction thereof. The second connection end 502 is used for fixedly connecting a transfer conduit 30 (such as the first transfer tube 3 or the second transfer tube 4 described above). The first connecting end 501 is used for fixedly connecting the liquid storage bag 6. The connection mode of the drainage bag connector 5 and the bag connection end 61 can be referred to the description in the above embodiment, and will not be repeated here, however, the disposable drainage bag can be referred to the description in the above embodiment, and the repeated parts will not be repeated here.

The drainage bag connector 5 comprises a body tube 51 extending lengthwise and a wing structure 52 integrally provided on the outer side wall of the body tube 51. The wing structure 52 comprises connecting sheets 521 symmetrically arranged on two sides of the body pipe 51, the connecting sheets 521 are provided with two opposite welding planes, the body pipe 51 is a straight pipe, and the outer diameter of the body pipe 51 extending from the first connecting end 501 to the second connecting end 502 is kept unchanged.

The material of the main body tube 51 is similar to or the same as that of the transmission conduit 30. The inner diameter of the body tube 51 is larger than the inner diameter of the delivery catheter 30. The outer diameter of the body tube 51 is larger than the outer diameter of the delivery catheter 30.

In this embodiment, the connection sheets 521 are symmetrically disposed on the outer wall of the body tube 51 having a straight tube structure, and the connection sheets 521 have a length longer than the connection sheets 521 of the drainage bag connector shown in fig. 2 and 3. As shown in fig. 21 and 22, the connecting sheet 521 extends continuously from at least one weld bead strip to another weld bead strip, and further, the connecting sheet 521 extends continuously across all weld bead strips. For ease of manufacturing and improved manufacturing efficiency, the connection sheet 521 extends from one end of the body tube 51 to the other end of the body tube 51, and the connection sheet 521 is equal in length to the drainage bag connector 5 (or the body tube 51). Of course, as shown in fig. 30, the connection sheet 521 may have a long length, and need only span a plurality of bead strips, and need not have the same length as the length of the body pipe 51, such as the length of the connection sheet 521 being 0.5 times or more the length of the body pipe 51.

Specifically, the length of the connection sheet 521 (length in the longitudinal direction of the body pipe 51) is 0.02mm or more, and its length may be between 0.02mm and 20mm, preferably its length is between 5mm and 15 mm. The thickness of the attachment tab 521 is 0.05-2mm.

Of course, the thickness and radial length (width) of the connecting sheet 521 may be described in the above embodiments, and will not be described herein.

One end of the transmission conduit 30 is connected with the connecting joint 10, and the other end is fixedly sleeved inside the second connecting end 502 of the drainage bag joint 5. One end of the transmission catheter 30 is fixedly adhered to the inside of the body tube 51 of the drainage bag connector 5. The drainage bag joint 5 and the transmission catheter 30 are made of similar or identical materials, and can be directly bonded after being sleeved, and the bonding quality is firm. The second connection end 502 is heated, expanded and softened, and then one end of the transmission conduit 30 is inserted into the second connection end 502, and is cooled to form bonding fixation without glue or adhesive. Of course, the transfer conduit 30 may be heated a second time after one end is inserted into the second connection end 502 so that both are in a non-molten expanded softened state and then cooled naturally.

In a preferred manner of connection, one end of the delivery catheter 30 may be cold-plugged directly into the second connection end 502, with the insertion end of the delivery catheter 30 having an outer diameter greater than the inner diameter of the second connection end 502, and the second connection end 502 having an inner diameter less than the outer diameter of the insertion end of the delivery catheter 30. The inner diameter of the second connection end 502 is 1% -50% smaller than the outer diameter of the insertion end of the transmission catheter 30. After the second connection end 502 is flared and then inserted into one end (insertion end) of the transmission catheter 30, the second connection end 502 is contracted and attached to the transmission catheter 30 after the second connection end 502 is released, and the second connection end 502 and the transmission catheter are similar or identical in material, so that a firm connection relationship is formed during attachment. By means of cold insertion, the insertion end of the transmission catheter 30 is non-adhesively fitted and sleeved in the second connection end 502.

It can be appreciated that the cold-plugging connection mode of the transmission conduit 30 and the second connection end 502 is applied to the drainage bag connector 5 and the second transmission pipe 4, and that at this time, the second connection end 502 is fixedly connected with the second transmission pipe 4, the first connection end 501 is fixedly connected with the liquid storage bag, and the second connection end 502 is non-adhesively sleeved outside one end of the second transmission pipe 4. To ensure the connection effect, the outer diameter of the second transmission pipe 4 is greater than the inner diameter of the second connection end 502, specifically, the outer diameter of the second transmission pipe 4 is greater than the inner diameter of the second connection end 502 by 1% -50%, that is, the outer diameter of the second transmission pipe 4 is 1.01 times to 1.5 times the inner diameter of the second connection end 502. The drainage bag joint 5 is of an integral injection molding structure, and the material of the drainage bag joint 5 is the same as that of the second transmission pipe 4. One end of the second transmission pipe 4 is inserted into the second connection end 502 through cold insertion. The second transfer tube 4 is sleeved in the second connecting end 502 with a length of 2mm to 30mm. The second transfer tube 4 is sleeved into the second connecting end 502 with a tube inner diameter of the second transfer tube 4 of which the length is one third to four times.

Further research has found that the hooking structure of the joint and the transmission pipe can be suitable for use in an ethylene oxide sterilization environment without causing a problem of seal failure. However, after the high-temperature sterilization process, the joint and the transmission pipe (transmission conduit) are made of different materials, so that the expansion performance of the joint and the transmission pipe is different at high temperature, the retraction performance of the joint and the transmission pipe is different after cooling, the hooking strength of a hooking structure between the joint and the transmission pipe is damaged, and the other problem is that the attaching seal between the joint and the transmission pipe is damaged, and the yield is reduced after the sterilization process.

In order to solve the above-mentioned problems, referring to fig. 21 to 29, an embodiment of the present application further provides a connection connector 10, and the improved structure of the connection connector 10 can be applied to the drainage bag connector 5, the three-way connector 10, or the luer connector shown in fig. 29 of the above-mentioned embodiments, and of course, the improved structure of the present embodiment can be adopted when a hook structure exists between the connector and the transmission tube.

In this embodiment, the connector 10 has a connector body and a connector ring 80 disposed on the connector body. The joint body is provided with a reduced diameter section 112 (or reduced diameter portion) and an expanded section 111 (or expanded portion). The annular interface of the reduced diameter section 112 and the expanded section 111 forms the connecting step 113 (or elevation step). The connector body may be the drainage bag connector 5, the three-way connector 10, or the luer connector shown in fig. 29, or the connection connector in fig. 18 and 19 of the above-described embodiment, and accordingly, the connection ring 80 may be applied to the connector of the above-described embodiment as a modified structure.

The connecting ring 80 is fixedly sleeved outside the reducing section 112. The connection ring 80 seals against the outer wall of the reduced diameter section 112. The connecting ring 80 is elastically sleeved on the outer wall of the reducing section 112 in a shrinkage manner so as to seal the connecting ring and the reducing section. Further, to avoid displacement of the connecting ring 80 during cold insertion of the connector, a stop structure is fixedly provided outside the reduced diameter section 112. The connecting ring 80 is sleeved outside the reduced diameter section 112 between the stop structure and the connecting step 113 in an elastically contractible manner. As shown in fig. 34, the stopper structure is relied on to avoid the problem of poor connection effect caused by the retraction of the connection ring 80 during cold insertion.

The stop structure is a protruding structure fixedly connected to the outer wall of the reducing section 112, and may be a single protruding structure, or may be a plurality of circumferential spacing protruding blocks, or may be a protruding ring structure. The stop ring 77 is the same material as the joint body, and may be the joint body itself. As shown in fig. 31, the stop structure includes a stop ring 77 integrally injection molded with the fitting body. The outer diameter of the stop ring 77 is less than or equal to the outer diameter of the connecting ring. The stop ring 77 is located approximately midway in the reduced diameter section, thereby reserving sufficient length for the transmission tube to fit around. The structure of the joint to which the stopper ring 77 is applied in the above-described embodiment is shown in fig. 31, 32, 33.

In addition, in one possible embodiment, the connecting ring 80 may be injection molded directly over the reduced diameter section 112, and no stop structure may be provided at this time, and the connecting ring 80 may be sealingly connected to the outer wall of the reduced diameter section 112.

The material of the connecting ring 80 is different from the material of the connector (main body), that is, the material of the connecting ring 80 is different from the material of the drainage bag connector 5 and the three-way connector 10. The material of the connection ring 80 is similar to or the same as that of the transmission tube (transmission conduit 30). The connection ring 80 is provided at the outer end of the reduced diameter section 112, near the connection step 113. The outer diameter of the connection ring 80 is greater than or equal to the outer diameter of the expansion section 111, and the outer diameter of the connection ring 80 is greater than or equal to the outer diameter of the connection step 113. Preferably, the outer diameter of the connection ring 80 is greater than the outer diameter of the connection step 113 (or the expansion section 111) by more than 0.1 mm. For example, the outer diameter of the connection ring 80 is 0.1mm to 2mm larger than the outer diameter of the connection step 113 (or the expansion section 111), so that the stability of the sealing fit and hooking structure with the transfer catheter 30 can be maintained by the protruding connection ring 80 after the sterilization at high temperature.

In this embodiment, the elastic modulus of the connecting ring 80 is greater than that of the connector body, so that a sufficient expansion amount can be provided to fit the inner wall of the transfer conduit 30 after being sterilized at high temperature. The connector ring 80 has a dimensional length (along the length of the connector body, such as in the direction H of fig. 3) of about 0.5-10mm.

The connecting ring 80 is a non-PVC material. The material of the connecting ring 80 is the same as or similar to the material of the transfer conduit 30. The material of the connection ring 80 includes a base material and an elastic material. The base material and the elastic material are main component materials of the drainage bag joint 5, the weight percentage of the base material and the elastic material is more than 50%, and the base material is PP or PE. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS. The weight percent of the elastomeric material of the connector ring 80 is greater than the weight percent of the elastomeric material of the connector body. The material of the connecting ring 80 is the same as or similar to that of the transmission conduit 30, and the connecting ring 80 and the transmission conduit 30 can form material fusion after the high-temperature sterilization process, so that the connecting ring 80 and the transmission conduit 30 form stable bonding seal.

The material of the connecting ring 80 may be EVA, POE, POP, SEBS or PP as the main body, and an elastic material may be added. The added elastic material has certain viscosity at normal temperature or at high temperature (40-150 ℃). Or the material of the connection ring 80 and the transfer conduit 30 have strong bonding energy of bonding or phase melting or intermolecular shape under high temperature environment.

The connecting ring 80 may be a circular ring, and the cross section of the connecting ring 80 is also circular, and as shown in fig. 26 and 27, the cross section of the connecting ring 80 may be triangular (inverted cone), rectangular, trapezoidal or irregular (irregular circular ring), which is not limited by the present application. The number of the connection rings 80 may be one or two or more, and the present application is not limited thereto.

Further researches have found that, in the above embodiment with the connection ring 80, although the problem of high temperature failure of the joint seal can be solved to a certain extent, in the case that the peritoneal dialysis tee joint (or the joint body) made of PTEE material and the transmission tube (or the transmission conduit) made of TPE material are combined, the two materials have different high temperature resistances, wherein the transmission tube made of TPE material has plastic deformation accelerated aging due to lower high temperature resistance after sterilization in a water bath, and although the connection ring 80 seals the joint and the transmission tube in a filling manner, the elastic failure generated by the transmission tube still causes the connection ring 80 to be filled but cannot be completely sealed in a fitting manner, so that the problem of seal failure still exists.

Through intensive researches of the inventor, the TPE material joint cannot be well wrapped, and the sealing failure generates a leakage problem because the TPE material joint cannot be well wrapped due to the fact that the TPE material joint is damaged, aged and loses elasticity due to crystallization after the TPE material conveying pipe is heated and swelled at a high temperature and then cooled with cold water to be shaped.

Of course, the difference in high temperature resistance also causes the hook strength of the hook structure between the joint and the transmission pipe to be destroyed, and a certain probability of disconnection still exists under the wetting condition.

The above problems are also present in connection with the bag end fitting and the transfer conduit 30.

To solve the above problems, as shown in fig. 36 to 41, a ferrule 60 is added to the connection structure of the joint and the transfer tube (transfer catheter 30) in one embodiment of the present invention. The collar 60 may be applied to the connection structure between the joint and the transmission tube (transmission catheter 30) in any of the above embodiments, and thus may be referred to by reference, and the repetition is not repeated. Specifically, the collar 60 is fixedly sleeved outside the pipe end 300 of the transmission pipe, and the transmission pipe and the corresponding joint are in non-adhesive sealing fit and sleeved.

In this embodiment, the three-way joint for peritoneal dialysis is made of TPEE. The first transmission pipe and the second transmission pipe are made of TPE materials. The material of the collar 60 is one selected from ABS, PC, TPEE, PS, aluminum, copper, silica gel, and rubber. Preferably, the material of the collar 60 is silica gel.

In this embodiment, the transmission pipe and the joint are tightly hooped by the physical structure through the collar 60, so that even if the transmission pipe and the joint are affected by sterilization and high temperature, the transmission pipe (the transmission pipe 30, the first transmission pipe or the second transmission pipe) and the joint can still be tightly hooped by the collar 60, so that the joint seal of the transmission pipe and the joint is maintained, and the sealed high-temperature failure is avoided. Wherein, the heat resistance of the material of the collar 60 is better than that of the material of the peritoneal dialysis tee joint. Specifically, the ferrule 60 is not plastically deformed under a temperature change within a range of-50 degrees to 150 degrees. The collar 60 can be sterilized at high temperature (100-120 deg.c) without aging and plastic deformation. For example, the cuff 60 has a heat resistant temperature of 100 to 150 degrees.

By arranging the high-temperature-resistant Wen Gu sleeve 60, the sleeve can still keep the tightening of the transmission pipe and the joint in a high-temperature sterilization environment, and even if one of the sleeves fails elastically due to certain degree of high temperature, the sleeve 60 does not deform before and after the high temperature, so that the structural state before and after the high-temperature sterilization can still be maintained at the position of the sleeve 60, and the sealing of the position is kept. At the same time, the use of the collar 60 can improve the connection strength at the location and reduce the probability of disconnection.

With the above description in mind, the pipe end 300 of the transmission pipe mainly includes the first portion 36 sleeved outside the reducing section 112 and the second portion 35 sleeved outside the expanding section 111, and the ferrule 60 may be sleeved on the first portion 36 or the second portion 35, or may be sleeved on the first portion 36 and the second portion 35. In addition, a plurality of ferrules 60 may be provided, and different ferrules 60 are respectively sleeved on the first portion or the second portion.

As in the embodiment shown in fig. 40, the collar 60 is only disposed about the first portion 36. As in the embodiment shown in fig. 39, the collar 60 is only disposed over the second portion. The collar 60 may also be placed over the entire expansion section 111 as in the embodiment shown in fig. 36 or 41. In the embodiment shown in fig. 41, the collar 60 is a copper sleeve, wherein one end of the collar 60 is correspondingly sleeved on the end chamfer 119 of the expansion section 111, the other end of the collar 60 is correspondingly sleeved on the diameter reduction section 112 and is adjacent to the connecting step 113, a front-back hooking structure is formed, and the front-back position of the collar 60 is positioned through the end chamfer 119 and the connecting step 113.

In this embodiment, as shown in fig. 37 and 38, only one ferrule 60 is provided, the ferrule 60 is a silicone sleeve, the ferrule 60 spans the connection step 113, one end 61 of the ferrule 60 is sleeved outside the reduced diameter section 112, the other end 62 is sleeved outside the expansion section 111, and the ferrule has a reducing portion 63 at a position corresponding to the connection step. The collar 60 extends continuously from one end 61, which is received in the first portion 36, to the other end 62, which is received in the second portion 35. The outer edge of the variable diameter portion 63 corresponds to the outer edge of the connecting step 113 at the same time as the outer edge of the variable diameter portion 63 corresponds to the connecting step position, and further the pinching action at this position is more prominent, and the bonding seal effect formed at this position is hardly broken. In addition, the collar 60 also forms a hooking structure of a secondary barb structure at the position, and the secondary hooking is carried out on the basis of the hooking structure formed by the transmission pipe, so that the structural connection strength of the transmission pipe and the joint at the position is further ensured, and the problem of disconnection is avoided.

The inner diameter of the silica gel sleeve in the natural state of non-sleeve is smaller than the outer diameter of the non-sleeve section (non-pipe end section) of the transmission pipe (namely the transmission conduit 30). Therefore, the silica gel sleeve can tightly sleeve and wrap the pipe end 300 of the transmission pipe when being sleeved outside the transmission pipe, so that the pipe end 300 of the transmission pipe is in sealing fit with the outer wall of the joint. The inner diameter of the silica gel sleeve in the natural state of non-sleeve is 0.1mm to 0.8mm different from the outer diameter of the non-sleeve section of the transmission pipe. In order to ensure the tightening and sealing effects, the length of the silica gel sleeve arranged on the expansion section 111 is more than one sixth of the length of the expansion section 111.

In order to ensure the sealing effect, even if the internal high-pressure transfusion state is still kept, the sealing can not be disconnected, and the wall thickness of the silica gel sleeve is more than 0.8mm and less than 1.5 mm. The pipe diameter parameter of the transmission pipe is 4.6mm (inner diameter) multiplied by 6.2mm (outer diameter), the pipe wall thickness is 0.8mm, the parameter of the silica gel sleeve is 5.8 plus or minus 0.3mm, and the wall thickness is 1 plus or minus 0.2mm.

The pipe diameter parameter of the TPE material transmission pipe is 4.6 mm multiplied by 6.2mm, and the maximum diameter (outer edge diameter) of the connecting step of the peritoneal dialysis three-way joint is 6.3-6.4mm. After the peritoneal dialysis tee joint is inserted into the pipe end of the transmission pipe, the maximum diameter of the connecting step is about 7.6mm, and the original wall thickness (in the non-sleeved state or the non-pipe end section) of the transmission pipe is 0.8mm and becomes 0.6mm thick.

The silicone tube was of the construction shown in FIG. 38, using 6mm by 8mm and 5.5mm by 7.5mm, with a wall thickness of 1mm. The sterilization is carried out for 20 minutes at 121 ℃ and then is kept for 24 hours at minus 25 ℃ for 24 hours under 50 ℃ and finally the leakage tube shaking test is carried out under the internal pressure of 0.3mpa, and the leakage problem can not be generated under the condition of shaking the tube for more than 2000 times (the tube shaking test is to simulate the patient to turn over on a sickbed). It should be noted that, in each embodiment of the present application, "degrees" indicating a temperature are all degrees celsius.

Likewise, the collar 60 of the above embodiment is equally applicable to the connection structure of the drainage bag connector 5 of the first bag body and the transmission catheter 30. In the embodiment shown in fig. 42 to 44, the drainage bag connector 5 is made of PP, and the transmission catheter 30 is made of TPE. The collar 60 is fixedly sleeved outside the pipe end of the transmission pipe 30, and the transmission pipe 30 is in non-adhesive sealing fit with the second connecting end 502. The transmission pipe 30, the diameter-reduced portion, the expansion portion and the elevation step can refer to the transmission pipe, the diameter-reduced portion 112, the expansion portion 111 and the connection step 113 in the above embodiment, and further refer to each other, and the repetition is not repeated.

The application of the cuff 60 of different construction as shown in figures 36 to 41 to the drainage bag connector 5 results in a disposable drainage bag of different embodiments as shown in figures 42 to 44.

As shown in fig. 35, a stopper structure is fixedly provided outside the reduced diameter portion 56. The pipe end of the transmission conduit 30 is sleeved outside the second connecting end 502 and does not exceed the stop structure. The stop structure comprises a stop ring 77 integrally injection molded with the drain bag connector 5. The stop ring 77 is used to indicate the location of the transfer catheter 30 to avoid over-installation of the transfer catheter 30. The stopper ring 77 protrudes from the outer wall of the reduced diameter portion. The outer diameter of the stop ring 77 is smaller than the outer diameter of the elevational step. The width W5 of the stop ring 77 along the length direction H of the drain bag connector 5 is between 0.5mm and 1.5mm, for example, the width W5 of the stop ring 77 is 1mm + -0.1 mm.

It should be noted that, the drainage bag connector and the disposable drainage bag in each embodiment of the present application may be referred to each other, and the repetition is not repeated.

Any numerical value recited herein includes all values of the lower and upper values that increment by one unit from the lower value to the upper value, as long as there is a spacing of at least two units between any lower value and any higher value. For example, if it is stated that the number of components or the value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, then the purpose is to explicitly list such values as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. in this specification as well. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be explicitly recited in this description, and all possible combinations of values recited between the lowest value and the highest value are believed to be explicitly stated in the description in a similar manner.

Unless otherwise indicated, all ranges include endpoints and all numbers between endpoints. "about" or "approximately" as used with a range is applicable to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the indicated endpoints.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the inventors regard such subject matter as not be considered to be part of the disclosed subject matter.

Claims

1. A disposable peritoneal dialysis drainage bag comprising:

a first bag for collecting fluid expelled during peritoneal dialysis;

the peritoneal dialysis three-way joint is provided with a dialysis luer joint, a liquid inlet joint and a liquid outlet joint, wherein the dialysis luer joint is used for connecting an abdomen permeation external pipe, and the protective cap is detachably covered on the dialysis luer joint;

One end of the first transmission pipe is fixedly communicated with the liquid inlet joint, and the other end of the first transmission pipe is used for being communicated with a second bag body containing dialysis liquid medicine;

the peritoneal dialysis tee joint is made of TPEE, and is of an injection molding integrated structure, wherein the peritoneal dialysis tee joint is provided with a dialysis luer joint, a liquid inlet joint and a liquid outlet joint.

2. The disposable peritoneal dialysis drainage bag of claim 1, wherein the heat resistance of the cuff material is better than the heat resistance of the material of the peritoneal dialysis tee.

3. The disposable peritoneal dialysis drainage bag of claim 1, wherein the cuff does not plastically deform under a temperature change within a range of-50 degrees to 150 degrees.

4. The disposable peritoneal dialysis drainage bag of any one of claims 1-3, wherein the first and second transfer tubes are made of TPE, and the collar is made of one of ABS, PC, TPEE, PS, aluminum, copper, silicone, and rubber.

5. The disposable peritoneal dialysis drainage bag of claim 1, wherein the collar spans the connection step, one end of the collar is sleeved outside the reduced diameter section, and the other end is sleeved outside the expanded section and has a reducing portion at a position corresponding to the connection step.

6. The disposable peritoneal dialysis drainage bag of claim 1, wherein the cuff is a silicone sleeve having a wall thickness of 0.8mm or more and 1.5mm or less.

7. The disposable peritoneal dialysis drainage bag of claim 6, wherein the inner diameter of the silicone sleeve in the uncapped natural state is less than the outer diameter of the uncapped section of the transfer tube.

8. The disposable peritoneal dialysis drainage bag of claim 7, wherein the inner diameter of the silicone sleeve in the uncapped natural state differs from the outer diameter of the uncapped section of the transfer tube by 0.1mm to 0.8mm.

9. The disposable peritoneal dialysis drainage bag of claim 6, wherein the length of the silicone sleeve over the expansion section is more than one sixth of the length of the expansion section.

10. A disposable drainage bag comprises a first bag body, a transmission catheter and a collar;

11. The disposable drainage bag of claim 10, wherein a stop structure is fixedly arranged outside the diameter-reducing part, and the pipe end of the transmission pipe is sleeved outside the second connecting end and does not exceed the stop structure.

12. The disposable drain bag of claim 11, wherein the stop structure comprises a stop ring integrally injection molded with the drain bag connector.

13. The disposable drainage bag of claim 10 wherein said drainage bag connector is PP and said transfer conduit is TPE.