CN113041442B - Multifunctional puncture-preventing indwelling needle with sleeve - Google Patents
Multifunctional puncture-preventing indwelling needle with sleeve Download PDFInfo
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- CN113041442B CN113041442B CN202110157509.7A CN202110157509A CN113041442B CN 113041442 B CN113041442 B CN 113041442B CN 202110157509 A CN202110157509 A CN 202110157509A CN 113041442 B CN113041442 B CN 113041442B
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- 239000007788 liquid Substances 0.000 claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 239000007924 injection Substances 0.000 abstract description 15
- 238000002347 injection Methods 0.000 abstract description 15
- 238000010241 blood sampling Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 238000001802 infusion Methods 0.000 description 28
- 239000008280 blood Substances 0.000 description 15
- 210000004369 blood Anatomy 0.000 description 15
- 210000004204 blood vessel Anatomy 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002792 vascular Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 208000035049 Blood-Borne Infections Diseases 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/15003—Source of blood for venous or arterial blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/15074—Needle sets comprising wings, e.g. butterfly type, for ease of handling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1587—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Medical Informatics (AREA)
- Pathology (AREA)
- Biophysics (AREA)
- Physics & Mathematics (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a sleeve type multifunctional puncture-proof indwelling needle which comprises an indwelling hose (3), an outer needle seat (5), an outer sleeve (1), a puncture needle (4), an inner needle seat (6) and an inner catheter (2) which are coaxially arranged. The sleeve type multifunctional puncture-preventing indwelling needle is simple in structure, convenient to produce and use, low in cost and convenient to popularize, an inner catheter capable of axially moving and used for conveying liquid is arranged in a flexible bendable outer sleeve, an indwelling hose is connected to the outer sleeve, a puncture needle for puncturing is connected to the inner catheter, a steel needle is not pulled out after puncturing and is hidden in the outer sleeve, and medical devices such as injection, transfusion and blood sampling can be directly connected to the inner catheter for operation.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to a sleeve type multifunctional puncture-proof indwelling needle.
Background
The retaining needle comprises an infusion hose which is retained in the blood vessel, a needle seat which is used for fixing the infusion hose so as to be convenient to hold, and a puncture needle which is inserted in the infusion hose and is used for guiding the infusion hose into the blood vessel. According to the structure and the infusion direction after the puncture, the indwelling needle is divided into a Y type and a straight type. In clinical care, indwelling needles are widely used, which can be used for repeated transfusion, so that patients are prevented from suffering from repeated puncture. However, existing indwelling needles suffer from a number of deficiencies, typically expressed as: (1) The function is single, and the Y-shaped infusion can only be performed and cannot be used for blood collection; although straight, the needle is withdrawn by pressing the blood vessel to prevent blood overflow, and then devices such as a joint and the like are quickly connected, so that the operation requirement is high; (2) The anti-puncture safety is low, and the anti-puncture device is easy to puncture and hurt by a puncture needle when in use, so that the blood-borne disease is infected, and although a few anti-puncture products exist, the anti-puncture effect is not good, or the structure of the anti-puncture device is complex in process, the production cost is high, and the anti-puncture device is not beneficial to large-scale popularization and use; (3) The comfort is poor, and the sheath is the stereoplasm structure, needs to be fixed on the patient's health with the adhesive tape laminating when keeping somewhere, leads to the patient very uncomfortable.
Therefore, the indwelling needle which has the functions of transfusion and blood sampling, high puncture-proof safety and can improve the use comfort of patients has extremely high application and market value on the premise of ensuring simple structure, convenient use and low cost.
Disclosure of Invention
Aiming at the defects and application requirements of the prior art, the invention aims to provide a sleeve type multifunctional puncture-proof indwelling needle, which can realize that an inner catheter which can move axially and is used for conveying liquid is arranged in a flexible bendable outer sleeve on the basis of simple structure, convenient production and use and low cost and convenient popularization, an indwelling hose is connected to the outer sleeve, a puncture needle for puncturing is connected to the inner catheter, a steel needle is not pulled out after puncturing but is hidden in the outer sleeve, and medical devices such as injection, transfusion and blood collection can be directly connected to the inner catheter for operation.
In order to achieve the above object, the present invention adopts the following technical scheme.
The utility model provides a multi-functional puncture-proof retention needle of sleeve type which characterized in that: comprises an indwelling hose (3), an outer needle seat (5), an outer sleeve (1), a puncture needle (4), an inner needle seat (6) and an inner catheter (2) which are coaxially arranged; wherein,
The outer needle seat (5) is provided with a through hole penetrating through the front end and the rear end at the center shaft, and the through hole is provided with a taper hole (51) structure with a narrow front and a wide rear at the rear end part; the retaining hose (3) is fixedly connected with the outer needle seat (5) in a way that the rear end part of the retaining hose is embedded into the through hole at the front end part of the outer needle seat (5); the outer needle seat (5) is fixedly connected with the outer sleeve (1) in a way that the rear end part of the outer needle seat is embedded into the front end part of the outer sleeve (1); the rear end of the outer sleeve (1) is provided with a narrow sleeve section (300) with gradually reduced inner diameter;
The front end part of the inner needle seat (6) is provided with a conical table (61) structure matched with the conical hole (51), and the inner needle seat (6) is provided with a through hole penetrating through the front end and the rear end at the center shaft; the puncture needle (4) is fixedly connected with the inner needle seat (6) in a way that the rear end part of the puncture needle is embedded into the through hole at the front end part of the inner needle seat (6); the inner needle seat (6) is fixedly connected with the inner catheter (2) in a mode that the rear end part of the inner needle seat is embedded into the front end part of the inner catheter (2), and the embedding of the inner needle seat (6) enables the front end part pipe wall of the inner catheter (2) to be spread to form a radial expansion section (100); the inner needle seat (6) is also provided with a diversion hole (64) for communicating the inner cavity of the needle seat with the outside;
The puncture needle (4), the inner needle seat (6) and the inner catheter (2) which are integrally and fixedly connected are inserted into a cavity formed by the indwelling hose (3), the outer needle seat (5) and the outer sleeve (1) and can move axially in the cavity;
The outer diameter of the radial expansion section (100) is matched with the inner diameter of the outer sleeve (1) so that the outer peripheral surface of the radial expansion section (100) is tightly attached to the inner surface of the outer sleeve (1); the axial length of the inner catheter (2) is greater than that of the outer sleeve (1), and the outer diameter of the radial expansion section (100) of the inner catheter (2) is greater than the inner diameter of the narrow sleeve section (300) of the outer sleeve (1);
in the initial state, the front end face of the inner needle seat (6) comprising the conical table (61) is attached to the rear end face of the outer needle seat (5) comprising the conical hole (51), the puncture needle (4) penetrates through the indwelling hose (3), and the needle tip is exposed out of the indwelling hose (3).
In the present invention, unless otherwise specified, the front end means the end to which the tip of the piercing needle (4) points, and the rear end means the opposite end.
The multifunctional puncture-proof indwelling needle product with the technical effects can be obtained on the premise of keeping low cost by arranging the sleeve structure with the inner needle seat and the outer needle seat and assisting in specific size design.
In the initial state, the front end face of the inner needle seat (6) is tightly attached to the rear end face of the outer needle seat (5), particularly the conical table (61) and the conical hole (51) which are matched in shape and size, at the moment, the locking and fixing between the inner tube and the outer tube are realized under the action of air pressure difference, so that the supporting force is provided for the puncture of the puncture needle (4), and the puncture needle (4) is prevented from withdrawing due to resistance during the puncture. After the puncture needle (4) punctures the skin and carries the indwelling hose (3) to enter the blood vessel, the puncture needle (4), the cavity of the inner needle seat (6) and the inner catheter (2) form a liquid flow channel, and the injection or blood sampling device is connected with the rear end of the inner catheter (2) so as to smoothly realize the purpose of injection or blood sampling.
Based on the purpose of keeping somewhere the infusion, after accomplishing vascular puncture operation, must follow the puncture needle (4), interior needle file (6) and interior pipe (2) of integrative fixed connection of axial backward movement, until radial expansion section (100) of interior pipe (2) realize interference locking fixed in narrow sleeve pipe section (300) department of outer tube (1) rear end, puncture needle (4) are from keeping somewhere hose (3) and return to the cavity inside of outer tube (1), at this moment, the cavity of interior pipe (2), interior needle file (6), guiding hole (64), the anterior segment cavity (200) and the keep somewhere hose (3) that are located between interior and exterior needle file of outer tube (1) form liquid runner one, the cavity of interior pipe (2), interior needle file (6), puncture needle (4), anterior segment cavity (200) and keep somewhere hose (3) and form liquid runner two. The infusion device is connected with the rear end of the inner catheter (2), so that the infusion can be smoothly performed, and the liquid can flow in the two flow channels at the same time.
The invention relates to a sleeve type multifunctional puncture-proof indwelling needle which is an improved invention based on the existing indwelling needle. Knowing the overall construction and method of use of the invention as shown above, the specific dimensions and connection design of the components will be readily ascertainable to those skilled in the art, e.g. the outer diameter of the piercing needle (4) should match the inner diameter of the indwelling hose (3), the axial length of the outer sleeve (1) should be greater than the length of the piercing needle (4), etc.
As a preferred embodiment, the mating taper of the tapered bore (51) and the tapered land (61) is between 4-10 degrees.
In the telescopic multifunctional puncture-preventing indwelling needle, the outer diameter of the radial expansion section (100) of the inner catheter (2) is matched with the inner diameter of the outer sleeve (1), so that the outer peripheral surface of the radial expansion section (100) is tightly attached to the inner surface of the outer sleeve (1). The close fitting at this time forms a closed partition, and a gap is prevented from occurring between the outer peripheral surface of the radially expanded section (100) and the inner surface of the outer sleeve (1), so that liquid in the front cavity is prevented from entering the cavity of the outer sleeve (1) at the rear end of the fitting portion.
As a preferred embodiment, the axial middle part of the inner needle seat (6) is provided with an annular bulge (62) in the radial direction, and the diameter of the annular bulge (62) is matched with the outer diameter of the radial expansion section (100) and the inner diameter of the outer sleeve (1). The annular bulge (62) can enable the front end part of the inner needle seat (6) to be better attached to the rear end part of the outer needle seat (5) in the initial state, is also beneficial to positioning when the rear end part of the inner needle seat (6) is embedded into the inner catheter (2), and is also beneficial to enhancing the airtight connection with the outer sleeve (1).
As a preferred embodiment, the inner needle seat (6) is provided with an inner flow cavity (63) at the rear section of the through hole, and the diameter of the inner flow cavity (63) is larger than that of the through hole of the inner needle seat (6). At the same time, the diversion holes (64) are radially arranged, one end of the diversion holes is communicated with an inner flow cavity (63) of the inner needle seat (6), and the other end of the diversion holes extends to the side peripheral surface of the conical table (61).
In the telescopic multifunctional puncture-preventing indwelling needle, the inner diameter of a narrow sleeve section (300) of an outer sleeve (1) is smaller than the outer diameter of a radial expansion section (100) of an inner catheter (2). The design ensures that the narrow sleeve section (300) of the outer sleeve (1) forms a limiting structure, can prevent the inner catheter (2) from being separated from the outer sleeve (1) when moving axially, and ensures that the puncture needle (4), the inner needle seat (6) and the radial expansion section (100) of the inner catheter (2) are always positioned in a cavity formed by the indwelling hose (3), the outer needle seat (5) and the outer sleeve (1). In the state of indwelling transfusion, the radial expansion section (100) of the inner catheter (2) is locked and fixed in an interference fit mode at the narrow sleeve section (300) of the outer sleeve (1). As a preferred embodiment, corresponding marks are provided on the walls of the radially expanded section (100) and the narrow sleeve section (300) to identify the final position to be reached for the rearward axial movement of the radially expanded section (100) to avoid the locking being fixed in place or being forced too hard. As an example of a marking, a coloured identification line for alignment purposes may be provided.
Suitably, the inner diameter of the rear end opening (12) of the outer sleeve (1) is matched with the outer diameter size of the inner catheter (2), and the design is beneficial to strengthening the limiting function, improving the radial stability (avoiding angular offset) of the inner catheter (2) during axial movement, and also avoiding the pollution of the cavity between the inner catheter (2) and the outer sleeve (1) by external pollutants.
In the telescopic multifunctional puncture-preventing indwelling needle of the present invention, the materials of the components should meet the medical standards, which is easily thought and confirmed by those skilled in the art, for example, the indwelling hose (3) may be made of FEP material, the puncture needle (4) is made of metal material, and the inner needle holder (6) and the outer needle holder (5) are made of hard plastic. The outer sleeve (1) and the inner catheter (2) are preferably made of soft plastic from the standpoint of improving comfort of use for the patient.
As a preferred embodiment, the outer sleeve (1) is provided with a wing part (11) for holding at the outer periphery side of the front end part so as to be convenient for medical staff to operate; in the initial state, the section of the inner catheter (2) exposed outside the outer sleeve (1) is provided with a liquid stopping clamp; the rear end of the inner catheter (2) is connected with a joint (21) so as to be convenient for connecting an injection, blood sampling or transfusion device.
Compared with the prior art, the invention has the following beneficial effects:
(1) Has multiple functions of injection, blood sampling and transfusion. After the puncture needle (4) punctures the skin and carries the indwelling hose (3) into the blood vessel, the puncture needle (4), the cavity of the inner needle seat (6) and the inner catheter (2) form a liquid flow passage. At this time, the blood collection can be achieved by connecting the blood collection device at the connector (21) through the flow channel, or the injection operation can be reversely performed through the connector (21), the inner catheter (2), the cavity of the inner needle seat (6) and the puncture needle (4) by the connected injection device. During transfusion operation, the puncture needle (4), the inner needle seat (6) and the inner catheter (2) which are integrally and fixedly connected are pulled backwards along the axial direction, so that a first liquid flow channel and a second liquid flow channel are formed. The infusion operation can be performed by connecting the infusion device at the joint (21).
(2) The stab-resistant safety is high. The puncture needle (4) does not need to be separated and detached after the operation is kept somewhere, but returns to the inside of the cavity of the outer sleeve (1), so that the puncture of medical staff can be effectively prevented, the operation is convenient, and the difficulty of learning and putting on hands is low.
(3) Has improved use comfort. The outer sleeve (1) is soft and transparent, the blood return state of the puncture needle (4) can be observed, and when the puncture needle is placed, the outer sleeve (1) can be bent and attached to the skin, so that the body feeling of a patient is more comfortable.
(4) Simple structure, easy production and use, low cost and easy popularization.
Drawings
FIG. 1 is a schematic sectional view showing an initial state of a multi-functional puncture-preventing indwelling needle according to an embodiment;
fig. 2 is an enlarged partial schematic view of the attachment of the hub of fig. 1;
FIG. 3 is a schematic cross-sectional view of an outer member;
FIG. 4 is a schematic cross-sectional view of an inner member;
FIG. 5 is a schematic view of a sectional structure in an infusion state;
FIG. 6 is an enlarged partial schematic view of the rear end of the outer sleeve of FIG. 5;
FIG. 7 is a physical view of the multifunctional puncture-preventing indwelling needle (equipped with a liquid-stopping clip) of the sleeve type according to the embodiment;
fig. 8 is a schematic view showing the appearance effect of the contact part with the skin in the infusion state.
The reference numerals in the figures have the following meanings: 1-an outer sleeve; 11-wings; 12-opening; 2-an inner catheter; 21-linker; 3-indwelling hose; 4-piercing needle; 5-an outer needle seat; 51-a tapered hole; 6-an inner needle seat; 61-a conical table; 62-annular protrusions; 63-an inner lumen; 64-deflector holes; 100-radial expansion section; 200-front side section cavity; 300-narrow casing section.
Detailed Description
The present invention is described in further detail below with reference to the drawings and examples, which should not be construed as limiting the scope of the invention.
Examples
A sleeve type multifunctional puncture-proof indwelling needle comprises an indwelling hose 3, an outer needle seat 5, an outer sleeve 1, a puncture needle 4, an inner needle seat 6 and an inner catheter 2 which are coaxially arranged.
The outer sleeve 1 is a hollow circular tube with front and rear ends penetrating and made of soft transparent plastic, wing parts 11 for holding are symmetrically arranged on the outer peripheral side of the front end part, and a narrow sleeve section 300 with gradually reduced inner diameter is arranged on the rear end. The outer hub 5 is a cylindrical structure made of hard plastic, wherein a through hole penetrating through the front and rear ends is arranged at the center shaft, and the through hole is provided with a conical hole 51 with a narrow front and a wide rear at the rear end part, and the taper is 6 degrees. The indwelling hose 3 is a hollow circular tube made of FEP material, is fixedly connected to the outer hub 5 in such a manner that the rear end portion thereof is fitted into the front end portion through-hole of the outer hub 5, and communicates with the conical hole 51. The outer hub 5 is fixedly connected to the outer sleeve 1 in such a manner that the rear end portion thereof is inserted into the front end portion of the outer sleeve 1.
The inner catheter 2 is a hollow round tube with front and rear ends communicated and made of soft transparent plastic, the outer diameter of the hollow round tube is matched with the inner diameter of the rear end opening 12 of the outer sleeve 1, and the axial length of the hollow round tube is larger than that of the outer sleeve 1. The inner hub 6 is a cylindrical structure made of hard plastic, but the front end part of the inner hub is provided with a conical table 61 matched with the shape and the size of the conical hole 51 so as to ensure that the conical hole 51 and the conical table 61 can be in seamless fit; the axial middle part of the inner needle seat 6 is provided with an annular bulge 62 in the radial direction, and the diameter is matched with the inner diameter of the outer sleeve 1. The inner needle seat 6 is provided with a through hole penetrating through the front end and the rear end at the center shaft, and the rear section of the through hole is provided with an inner flow cavity 63 with a larger diameter; the deflector hole 64 is radially provided in the inner hub 6, and has one end communicating with the inner flow chamber 63 and the other end extending to the side peripheral surface of the conical table 61. The puncture needle 4 is made of stainless steel, and the outer diameter is matched with the inner diameter of the indwelling hose 3. The puncture needle 4 is fixedly connected to the inner hub 6 in such a manner that its rear end portion is fitted into the through-hole at the front end portion of the inner hub 6, and communicates with the inner flow chamber 63. The inner needle seat 6 is fixedly connected with the inner catheter 2 in a mode that the rear end part of the inner needle seat is embedded into the front end part of the inner catheter 2 (until the annular bulge 62 abuts against the front end port of the inner catheter 2), and the embedding of the inner needle seat 6 enables the front end part pipe wall of the inner catheter 2 to be spread to form a radial expansion section 100, and the outer diameter of the radial expansion section 100 is matched with the diameter of the annular bulge 62 and the inner diameter of the outer sleeve 1. The rear end of the inner catheter 2 is connected with a joint 21.
The piercing needle 4, the inner hub 6 and the inner catheter 2, which are integrally and fixedly connected, are inserted through a cavity formed by the indwelling hose 3, the outer hub 5 and the outer sleeve 1, and are movable in the cavity in the axial direction. The outer peripheral surfaces of the annular projection 62 and the radially expanding section 100 are kept in close contact with the inner surface of the outer sleeve 1 at all times.
As shown in fig. 1, in the initial state, the conical table 61 is fitted into the conical hole 51, the front end face of the inner hub 6 including the conical table 61 and the rear end face of the outer hub 5 including the conical hole 51 are bonded to each other seamlessly, the outer port of the deflector hole 64 is blocked by the conical hole 51, the puncture needle 4 passes through the indwelling hose 3, and the tip of the needle is exposed outside the indwelling hose 3.
In order to more intuitively and clearly show the structure of the telescopic multifunctional puncture-preventing indwelling needle of the present invention, fig. 2 shows a partially enlarged schematic view of the joint between the inner and outer needle holders in fig. 1, fig. 3 shows a schematic sectional structure of an outer member composed of the indwelling hose 3, the outer needle holder 5 and the outer sleeve 1, and fig. 4 shows a schematic sectional structure of an inner member composed of the puncture needle 4, the inner needle holder 6 and the inner catheter 2.
The initial state is the product to be used state, and in this state, the piercing needle 4, the inner flow chamber 63, the inner catheter 2 and the connector 21 are sequentially communicated to form a liquid flow channel, so that the piercing blood collection operation can be directly performed, or the piercing injection and the indwelling transfusion operation can be performed after the air is exhausted. When blood is collected, air in the flow channel is discharged from the connector 21 along the blood flow; during the air discharge, the air in the flow passage is discharged from the tip of the piercing needle 4 along the flow direction of the chemical solution. During the process of puncturing the blood vessel by the puncture needle 4, the inner needle seat 6 and the outer needle seat 5 are tightly attached, and are in a locking and fixing state under the action of air pressure difference, so that a supporting force is provided for the puncturing process. After the puncture needle 4 punctures the skin and carries the indwelling hose 3 into the blood vessel, the injection or blood sampling device connected with the rear end of the inner catheter 2 can directly perform injection or blood sampling operation, or is matched with the infusion device to perform infusion operation after being switched to an indwelling infusion state.
To switch to the indwelling infusion state, the general steps include: the wing 11 is held by one hand, the inner catheter 2 is pulled to the rear side by one hand, so that the locking of the inner needle seat 6 and the outer needle seat 5 is released, the inner catheter 2 carries the inner needle seat 6 and the puncture needle 4 to move to the rear side of the outer sleeve 1 until the radial expansion section 100 of the inner catheter 2 is fixed at the narrow sleeve section 300 at the rear end of the outer sleeve 1 in an interference locking manner, and the puncture needle 4 is completely retracted into the cavity of the outer sleeve 1 from the indwelling hose 3.
At the moment when the conical table 61 and the conical hole 51 are separated, the diversion hole 64 is communicated with the inner cavity of the outer sleeve 1, and liquid can flow into the front section cavity 200 of the outer sleeve 1 from the inner cavity 63 and the diversion hole 64. The cavity of the front-side section cavity 200 gradually increases with the backward movement of the inner catheter 2, and the liquid continuously flows into and fills the cavity from the diversion holes 64. FIG. 5 is a schematic view showing a cross-sectional structure of the indwelling infusion device. In this state, the liquid flows through the passage of the inner catheter 2-inner flow chamber 63-deflector hole 64-front side section cavity 200-indwelling hose 3 and the passage of the inner catheter 2-inner flow chamber 63-piercing needle 4-front side section cavity 200-indwelling hose 3 simultaneously, so that the flow rate meets the requirement of indwelling transfusion.
Fig. 6 is an enlarged partial schematic view of the rear end portion of the outer sleeve of fig. 5.
Application examples
Fig. 7 is a view showing a physical form of the telescopic multifunctional puncture-preventing indwelling needle having the structure shown in fig. 1, which is provided with a liquid-stopping clip at a section of the inner catheter 2 exposed outside the outer sleeve 1. The application of the telescopic multifunctional puncture-preventing indwelling needle according to the present invention in infusion, blood collection and injection will be described below with reference to fig. 7.
1. Infusion solution
The sleeve type multifunctional puncture-proof retention needle is communicated with the infusion apparatus through a joint 21 at the rear end of the inner catheter 2, and after the exhaust operation is carried out by using the liquid medicine, the hand-held wing part 11 is used for carrying out vascular puncture. After blood return occurs in the inner catheter 2 through the transparent outer sleeve 1 and the inner catheter 2, the inner catheter 2 is pulled to enable the puncture needle 4 to slowly withdraw from the indwelling hose 3 until the radially expanded section 100 of the inner catheter 2 is in interference locking fixation at the narrow sleeve section 300 at the rear end of the outer sleeve 1, and meanwhile, the puncture needle 4 is completely withdrawn from the indwelling hose 3 into the cavity of the outer sleeve 1. The infusion set is then carried out by fixing the outer cannula 1 at the wings 11 using an adhesive tape and fixing the inner catheter 2 adjacent the rear end opening 12 of the outer cannula 1 (this is an optional operation, fixing the inner catheter 2 helps to prevent mishandling and thus breaking the locking fixation between it and the outer cannula 1).
Fig. 8 shows a schematic view of the appearance effect of the contact with the skin in the infusion state.
2. Injection of
The sleeve type multifunctional puncture-proof retention needle is communicated with the injector through a joint 21 at the rear end of the inner catheter 2, and after the exhaust operation is carried out by using the liquid medicine, the hand-held wing part 11 is used for carrying out vascular puncture. After the back blood appears in the inner catheter 2 through the transparent outer sleeve 1 and the inner catheter 2, the injection operation can be performed.
After the injection is completed, the liquid stopping clamp is closed, the injector is removed, the sleeve type multifunctional puncture-preventing remaining needle is connected with the exhausted infusion apparatus through the connector 21, then the liquid stopping clamp is opened, the inner catheter 2 is pulled and fixed by referring to the description in the description of '1 and infusion', and the state of remaining infusion can be switched.
3. Blood collection
The sleeve type multifunctional puncture-proof indwelling needle is communicated with the blood sampling device through the joint 21 at the rear end of the inner catheter 2, the hand-held wing part 11 performs vascular puncture, and then blood is sampled according to the conventional operation.
After blood collection, the liquid stopping clamp is closed, the blood collection device is removed, the sleeve type multifunctional puncture-preventing remaining needle is connected with the exhausted infusion apparatus through the connector 21, then the liquid stopping clamp is opened, the inner catheter 2 is pulled and fixed by referring to the description in the description of '1 and infusion', and the state of remaining infusion can be switched.
Claims (8)
1. The utility model provides a multi-functional puncture-proof retention needle of sleeve type which characterized in that: comprises an indwelling hose (3), an outer needle seat (5), an outer sleeve (1), a puncture needle (4), an inner needle seat (6) and an inner catheter (2) which are coaxially arranged;
the outer sleeve (1) and the inner catheter (2) are both made of transparent soft plastic, and the outer needle seat (5) and the inner needle seat (6) are both made of hard plastic;
Wherein,
The outer needle seat (5) is provided with a through hole penetrating through the front end and the rear end at the center shaft, and the through hole is provided with a taper hole (51) structure with a narrow front and a wide rear at the rear end part; the retaining hose (3) is fixedly connected with the outer needle seat (5) in a way that the rear end part of the retaining hose is embedded into the through hole at the front end part of the outer needle seat (5); the outer needle seat (5) is fixedly connected with the outer sleeve (1) in a way that the rear end part of the outer needle seat is embedded into the front end part of the outer sleeve (1); the rear end of the outer sleeve (1) is provided with a narrow sleeve section (300) with gradually reduced inner diameter;
The front end part of the inner needle seat (6) is provided with a conical table (61) structure matched with the conical hole (51), and the inner needle seat (6) is provided with a through hole penetrating through the front end and the rear end at the center shaft; the puncture needle (4) is fixedly connected with the inner needle seat (6) in a way that the rear end part of the puncture needle is embedded into the through hole at the front end part of the inner needle seat (6); the inner needle seat (6) is fixedly connected with the inner catheter (2) in a mode that the rear end part of the inner needle seat is embedded into the front end part of the inner catheter (2), and the embedding of the inner needle seat (6) enables the front end part pipe wall of the inner catheter (2) to be spread to form a radial expansion section (100); the inner needle seat (6) is also provided with a diversion hole (64) for communicating the inner cavity of the needle seat with the outside;
The matching taper of the taper hole (51) and the taper table (61) is between 4 and 10 degrees;
The puncture needle (4), the inner needle seat (6) and the inner catheter (2) which are integrally and fixedly connected are inserted into a cavity formed by the indwelling hose (3), the outer needle seat (5) and the outer sleeve (1) and can move axially in the cavity;
The outer diameter of the radial expansion section (100) is matched with the inner diameter of the outer sleeve (1) so that the outer peripheral surface of the radial expansion section (100) is tightly attached to the inner surface of the outer sleeve (1); the axial length of the inner catheter (2) is greater than that of the outer sleeve (1), and the outer diameter of the radial expansion section (100) of the inner catheter (2) is greater than the inner diameter of the narrow sleeve section (300) of the outer sleeve (1);
in the initial state, the front end face of the inner needle seat (6) comprising the conical table (61) is attached to the rear end face of the outer needle seat (5) comprising the conical hole (51), the puncture needle (4) passes through the indwelling hose (3) and the needle tip is exposed out of the indwelling hose (3);
In the state of indwelling transfusion, the radial expansion section (100) of the inner catheter (2) is locked and fixed in an interference fit mode at the narrow sleeve section (300) of the outer sleeve (1), the puncture needle (4) is retracted into the cavity of the outer sleeve (1) from the indwelling hose (3), and the needle tip of the puncture needle (4) is positioned in the conical hole (51) of the outer needle seat (5).
2. The telescopic multi-functional puncture-resistant indwelling needle according to claim 1, wherein: the axial middle part of the inner needle seat (6) is radially provided with an annular bulge (62), and the diameter of the annular bulge (62) is matched with the outer diameter of the radial expansion section (100) and the inner diameter of the outer sleeve (1).
3. The telescopic multi-functional puncture-resistant indwelling needle according to claim 1, wherein: the rear section of the through hole of the inner needle seat (6) is provided with an inner flow cavity (63), and the diameter of the inner flow cavity (63) is larger than that of the through hole of the inner needle seat (6).
4. A telescopic multi-functional puncture resistant indwelling needle according to claim 3, in which: the diversion hole (64) is radially arranged, one end of the diversion hole is communicated with an inner flow cavity (63) of the inner needle seat (6), and the other end of the diversion hole extends to the side circumferential surface of the conical table (61).
5. The telescopic multi-functional puncture-resistant indwelling needle according to claim 1, wherein: corresponding markings are provided on the walls of the radially expanded section (100) and the narrow casing section (300) to identify the final position to which the radially expanded section (100) is required to be moved axially rearward.
6. The telescopic multi-functional puncture-resistant indwelling needle according to claim 5, wherein: the marks are colored identification lines for alignment purposes.
7. The telescopic multi-functional puncture-resistant indwelling needle according to claim 1, wherein: the inner diameter of the rear end opening (12) of the outer sleeve (1) is matched with the outer diameter of the inner catheter (2).
8. The telescopic multi-functional puncture-resistant indwelling needle according to claim 1, wherein: the outer sleeve (1) is provided with a wing part (11) for holding at the outer periphery side of the front end part; in the initial state, the section of the inner catheter (2) exposed outside the outer sleeve (1) is provided with a liquid stopping clamp; the rear end of the inner conduit (2) is connected with a joint (21).
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| CN202110157509.7A CN113041442B (en) | 2021-02-04 | 2021-02-04 | Multifunctional puncture-preventing indwelling needle with sleeve |
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| CN202110157509.7A CN113041442B (en) | 2021-02-04 | 2021-02-04 | Multifunctional puncture-preventing indwelling needle with sleeve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209316694U (en) * | 2018-06-29 | 2019-08-30 | 广东先来医疗器械有限公司 | A kind of hose safety transfusion needle |
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| JP3652019B2 (en) * | 1996-07-22 | 2005-05-25 | 積水化学工業株式会社 | Vacuum blood collection holder and blood collection needle fixing / detaching method |
| JP2000126293A (en) * | 1998-10-28 | 2000-05-09 | Shimadzu Corp | Needleless injector |
| KR100338512B1 (en) * | 1999-12-17 | 2002-05-30 | 김용보 | fan |
| DE10307722A1 (en) * | 2002-03-07 | 2003-11-13 | Enomoto Co Ltd | Medical device |
| CN2638760Y (en) * | 2003-08-04 | 2004-09-08 | 邹德威 | Dilator for forming cavity in pyramid |
| US7381199B2 (en) * | 2004-11-09 | 2008-06-03 | Kuo-Lung Kuan | Structure of safety hypodermic syringe |
| KR200376257Y1 (en) * | 2004-12-03 | 2005-03-11 | 지-시엉 양 | Safe syringe of retrogression type using air pressure |
| KR101081589B1 (en) * | 2005-10-31 | 2011-11-08 | 밍 쳉 슈이 | syringe |
| US7618408B2 (en) * | 2006-09-20 | 2009-11-17 | Yandell Marion E | Vial assembly and method for reducing nosocomial infections |
| WO2014047891A1 (en) * | 2012-09-28 | 2014-04-03 | Zhang Jianming | Soft tube detaining scalp needle with combined and connected tube-needle |
| US10625028B2 (en) * | 2017-06-28 | 2020-04-21 | Retractable Technologies, Inc. | Safety syringe with needle redirection device |
| CN208927260U (en) * | 2018-06-27 | 2019-06-04 | 重庆市璧山区人民医院 | an indwelling needle |
| CN209122217U (en) * | 2018-09-12 | 2019-07-19 | 鹰潭荣嘉集团医疗器械实业有限公司 | A kind of modified form needle of retaining on artery |
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| CN209316694U (en) * | 2018-06-29 | 2019-08-30 | 广东先来医疗器械有限公司 | A kind of hose safety transfusion needle |
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