CN206526346U - Catheter - Google Patents

Abstract

An indwelling needle comprises a delivery catheter, a conical part is arranged at the rear part of the delivery catheter, a soft needle section for flowing liquid to pass through is axially extended at the front end of the conical part, and a connecting hole is formed at the rear end of the conical part; a relay pipe, which is a pipe body with elastic recovery, one end of the relay pipe is fixedly connected in the connecting hole and communicated with the conveying conduit: the outer connecting pipe is axially provided with an opening for fixedly connecting and communicating the other end of the relay pipe, and the outer peripheral surface of the rear section of the outer connecting pipe is provided with a first external thread section; and a liquid stop buckle ring which comprises a U-shaped body, wherein a pair of through holes for the relay pipe to penetrate through are arranged on the front side and the rear side of the body, a buckle piece extends into the top opening of the body integrally, the buckle piece is selectively buckled on a buckle hook arranged on the vertical inner wall of the body oppositely, and a pair of clamping tenons capable of forming on-off control on the relay pipe are arranged on the bottom surface of the buckle piece and the horizontal inner wall of the body oppositely in a protruding mode.

Description

Catheter

technical field

The utility model relates to an indwelling needle, in particular to an indwelling needle which can provide patients with comfort and safety during infusion.

Background technique

Syringes (Administration set), such as butterfly needles or indwelling needles, are used to deliver blood or liquid medicine during kidney dialysis, intravenous injection or drip injection. The traditional butterfly needle has a special shape. It protrudes a pair of fins radially and symmetrically from a body, a metal needle protrudes axially from the front, and an infusion tube is integrally connected to the rear. The end of the infusion tube is connected to a detachable end. Cover to prevent foreign matter from entering the infusion tube. During use, the medical personnel pinch the pair of wings with two fingers, so as to puncture the metal needle into the patient's blood vessel, as the delivery of blood or medicinal liquid.

Due to the rigid material of the metal needle, it is placed in the blood vessel of the human body, especially during the long-term dialysis process, which often causes pain and discomfort to the patient, and the long-term use may easily cause vascular embrittlement damage.

Based on the above-mentioned shortcomings of butterfly needles, related companies have developed an indwelling needle made of polymer materials, which is composed of a tapered part, a delivery tube, a relay tube and an external tube. The conveying pipe is sheathed and adhered to the front section of the tapered part, so that the front and middle sections of the soft conveying pipe protrude from the front end of the tapered part, and the two ends of the relay pipe are respectively adhered to the rear part of the tapered part between the front end of the external tube.

When the above-mentioned indwelling needle is used, a puncture needle is used to penetrate the outer connecting tube, relay tube, delivery tube and tapered part, and the needle head of the puncture needle is exposed outside the tapered part, and then punctured together with the front end of the delivery tube. After entering the blood vessel of the human body, the puncture needle is pulled out, so that the delivery tube is left in the blood vessel for delivery of medicinal liquid or blood. In order to prevent the blood from flowing out, the relay tube is a pinchable flexible pipe during implementation.

The above-mentioned indwelling needle structure has been used for many years. Its advantage is that the delivery tube is made of polymer soft material, and it is indwelling in the blood vessel without causing pain and discomfort to the patient. The only disadvantage is that the indwelling needle has no controllable flow rate. The liquid-stop device is set up, because the external tube of the indwelling needle is directly connected to an instrument that transports liquid, such as blood or medicinal liquid, and there is no firm connection between the two, so that the indwelling needle may be easily damaged when pulled. Separation from the catheter endangers the safety of the patient.

In addition, when a medical institution encounters an accident such as an earthquake or a fire, the indwelling needle has no stop device that can control the flow of fluid, which increases the difficulty for patients to escape. This is a problem that the relevant industry needs to overcome.

Utility model content

The main purpose of the utility model is to provide an indwelling needle, which is equipped with a liquid-stop buckle, so that the indwelling needle can control the flow of fluid, such as the interruption of blood or medicinal liquid, so as to provide patients with infusion Comfort and safety in use.

In order to achieve the above-mentioned purpose, the technical means adopted by the utility model is to provide an indwelling needle, which includes a delivery catheter with a tapered part at the rear, and the front end of the tapered part extends axially through a soft Needle section, and the rear end forms a connection hole; a relay tube, which is a tube body with elastic recovery, one end of the relay tube is fixed in the connection hole, and communicates with the delivery catheter; an external connection tube, its An opening is provided in the axial direction for the other end of the relay pipe to be connected and communicated, and a first external thread section is provided on the outer peripheral surface of the rear section; and a liquid stop buckle, which includes a U-shaped body, the front side of the body and The rear side is provided with a pair of through holes for the relay pipe to pass through. The top opening of the main body extends a buckle piece integrally. The bottom surface of the locking piece protrudes opposite to the horizontal inner wall of the body, and a pair of clamping tenons which can form the on-off control of the relay pipe are protruded.

Preferably, a plurality of guide holes are opened radially in front of the needle segment. The plurality of guide holes include a pair of first guide holes and a pair of second guide holes arranged in a shifted position.

Preferably, the delivery catheter is a tube body made of soft polymer material, the relay tube is a tube body made of elastic polymer material, and the external tube is a tube body made of hard polymer material . Wherein the conveying catheter is a pipe body made of polypropylene, the relay pipe is a pipe body made of silica gel, and the external connecting pipe is a pipe body made of polyvinyl chloride.

Preferably, the relay pipe and the outer connecting pipe are embedded and injection-molded into a long pipe body.

Preferably, the indwelling needle further includes a puncture device, the puncture device includes a puncture needle, which has an elongated hollow needle body, a hollow needle head and a needle seat are respectively provided at both ends of the needle body; and a hemostatic plug , the front end is provided with a seat ring with an internal thread section inside, and the internal thread section is screwed to the first external thread section of the external pipe, so that the hemostatic plug is fixed on the external pipe, and the central axis of the seat ring Extending to an insertion tube that can be inserted into the rear section of the opening, the rear of the insertion tube communicates with a hole, and a plug made of elastic polymer material is sleeved in the seat hole; the needle body passes through the hemostatic plug, the outer Take over the tube, the relay tube and the delivery catheter, and expose the needle at the front end of the needle segment.

Preferably, the indwelling needle further includes a needle sheath, and the rear end of the needle sheath is provided with a second external thread segment; wherein the needle sheath is selectively sleeved on the cone of the delivery catheter according to the use state of the indwelling needle The shape part, or the second external thread section is screwed to the internal thread section of the hemostatic plug, so as to cover the needle.

Preferably, the puncture device further includes a lace, and the two ends of the lace respectively have a first sleeve hole sleeved on the hemostatic plug and a second sleeve hole sleeved on the needle hub.

Description of drawings

For further revealing the concrete technical content of the present utility model, please refer to accompanying drawing at first, wherein:

Fig. 1 is a three-dimensional exploded view of the indwelling needle of the present invention;

Fig. 2 is a perspective view of the utility model after the indwelling needle is assembled;

Fig. 3 is a perspective view of the indwelling needle of the present invention when in use;

Fig. 4 is a cross-sectional view of the indwelling needle of the present invention when in use;

Fig. 5 is a perspective view of the utility model when the puncture needle is pulled out from the indwelling needle;

Figure 6 is a cross-sectional view of the puncture needle of the present invention when it is pulled out from the indwelling needle;

Fig. 7 is a three-dimensional exploded view of the puncture device and the needle sheath of the present invention; and

Fig. 8 is a cross-sectional view of the puncture device of the present invention combined with the needle sheath.

detailed description

As shown in FIG. 1 to FIG. 4 , basically, the indwelling needle of the present invention is composed of a delivery catheter 1 , a relay tube 2 , an external tube 3 and a liquid stop buckle 4 .

The delivery catheter 1 is made of soft polymer material, such as polypropylene (Polypropylene), and has a tapered portion 11 at the rear. A soft needle section 12 through which blood or medical liquid passes, and a connection hole 13 with a larger diameter (shown in FIG. 4 ) is formed at the rear end so as to be connected with the relay tube 2 .

Wherein, a plurality of guide holes 14 are provided radially in front of the needle section 12, and the plurality of guide holes 14 include a pair of first guide holes 141 and a pair of second guide holes 142 that are misaligned, for example, at 90 degrees, so as to facilitate When puncturing, blood flows into the needle section 12 through the guide hole 14, so that the puncturing is easy.

The relay pipe 2 is made of elastic polymer material, such as silica gel, which is elongated and has elastic recovery. Two ends of the relay pipe 2 are adhered to the connecting hole 13 and the front section of the outer connecting pipe 3 with an adhesive, so that the relay pipe 2 communicates with the delivery catheter 1 .

The outer tube 3 is made of hard polymer material, such as a tube body made of polyvinyl chloride (Poly Vinyl Chloride), and the outer tube 3 is used for connecting an infusion catheter (the prior art, not shown). The connecting pipe 3 axially defines a step-shaped opening 31 for the other end of the relay pipe 2 to adhere to, and a first external thread section 32 is provided on the outer peripheral surface of the rear section.

Further, the relay pipe 2 and the external pipe 3 are combined into one body, for example, after the relay pipe 2 and the external pipe 3 are molded by embedded injection molding, a long pipe body can be formed.

The liquid-stop buckle 4 has a U-shaped body 41, a pair of through holes 42 for the relay pipe 2 are formed on the front side and the rear side of the body 41, and a buckle piece is integrally extended from the top opening of the body 41. 43, so as to be selectively fastened to a clasp 44 opposite to the upright inner wall of the body 41, and the bottom surface of the buckle piece 43 protrudes relative to the horizontal inner wall of the body 41 to form a disconnection of the relay pipe 2 A pair of clip tenon 45 of control.

When the buckle piece 43 is not fastened to the main body 41 , the fluid can pass through the relay tube 2 and enter the infusion catheter 1 , so as to transport the fluid into the patient's blood vessel. Conversely, when the buckle piece 43 is fastened to the body 41, the pair of clamp tenons 45 jointly clamp the relay tube 2 (shown in FIG. 6 ), so that the fluid will not enter the infusion catheter 1, or the blood will not into the external pipe 3.

Please refer to FIG. 1 to FIG. 4 again, the indwelling needle further includes a puncture device 5 , and the puncture device 5 includes a puncture needle 51 and a hemostatic plug 52 . The hemostatic plug 52 is sleeved on the rear end of the external tube 3, so that a hollow needle body 511 of the puncture needle 51 can be inserted into the hemostatic plug 52, the external tube 3, the relay tube 2 and the delivery catheter 1, so that The hollow needle head 512 at the front end of the puncture needle 51 protrudes from the front end of the needle section 12 . And the rear end of the puncture needle 51 has a needle base 513 for medical staff to hold with their fingers.

The front section of the hemostatic plug 52 is provided with a seat ring 521 with an internal thread section 522 inside, and the internal thread section 522 is screwed to the first external thread section 32 of the outer tube 3 so that the hemostatic plug 52 is fixed on the outer Take over 3 backends. In particular, in order to provide that the puncture needle 51 can smoothly enter the outer tube 3, the relay tube 2 and the delivery catheter 1, the center of the seat ring 521 protrudes axially and can be inserted into the rear section of the opening 31 An insertion tube 523 is provided, and the rear of the insertion tube 523 communicates with a seat hole 524, and a seat plug 525 made of elastic polymer material, such as silica gel, is sheathed in the seat hole 524.

When the hemostatic plug 52 is fixed on the rear end of the external tube 3, the insertion tube 523 is inserted into the rear section of the opening 31, and the needle body 511 is clamped on the seat plug 525, and passes through the external tube 3, the The relay tube 2 and the delivery catheter 1 make the needle 512 partially exposed at the front end of the needle segment 12 .

Furthermore, the puncture device 5 further includes a lace 53, the two ends of the lace 53 respectively have a first sleeve hole 531 sleeved on the hemostatic plug 52, and a second sleeve sleeved on the needle hub 513. Hole 532. The tether 53 is preferably made of elastic polymer material, such as rubber, and its function is to limit the withdrawal distance of the puncture needle 51 so as not to separate from the hemostatic plug 52 .

Further, the indwelling needle further includes a needle sheath 6 (shown in FIG. 1 and FIG. 2 ). After the indwelling needle is assembled according to the aforementioned procedures, the needle sheath 6 is sleeved on the tapered portion 11 of the delivery catheter 1 , In order to cover the needle segment 12 and the needle head 512 completely, to avoid contamination and prevent accidental pricking. In addition, the rear end of the needle sheath 6 is further provided with a second external thread segment 61 .

Please refer to FIG. 3 to FIG. 6. If you want to puncture the patient with an indwelling needle, firstly, the needle body 511 of the puncture needle 51 passes through the hemostatic plug 52, the external connecting tube 3, the relay tube 2 and the delivery catheter. 1, and the needle head 512 is exposed at the front end of the needle section 12. When in use, the medical personnel hold the puncture needle 51 and the hemostatic plug 52, and insert the needle head 512 together with the needle section 12 into the blood vessel of the patient. hole 141 and the pair of second guide holes 142, therefore, when the needle 512 punctures a blood vessel, blood flows into the needle section 12 through the guide holes 141, 142, so as to avoid being punctured by the puncture needle 51. resulting impedance. Next, hold the needle hub 513, and pull the needle body 511 away from the delivery catheter 1 and the relay tube 2, and then press the buckle piece 43 so that the buckle piece 43 is fastened to the buckle. hook 44, so that the pair of clamping tenons 45 clamp the relay tube 2 to prevent blood from spraying out to the rear of the external tube 3 to form a hemostatic effect (shown in FIGS. 5 and 6 ).

As shown in FIG. 7 , next, the medical staff separates the hemostatic plug 52 from the outer tube 3 , and screw-connects the second external threaded section 61 of the needle sheath 6 to the internal threaded section 522 of the hemostatic plug 52 , In order to cover the needle 512 (shown in FIG. 8 ), and collect the puncture device 5 as medical waste. Therefore, the needle sheath 6 is selectively sleeved on the tapered portion 11 of the delivery catheter 1 according to the use state of the indwelling needle, or is screwed to the inner portion of the hemostatic plug 52 by using the second external thread segment 61 . The threaded section 522 is used to cover the needle 512 to prevent accidental puncture.

Finally, the medical personnel can connect one end of the infusion catheter (not shown) of the prior art to the external connection tube 3, and connect the other end of the infusion catheter to a hemodialysis machine, so that the dialyzed blood passes through the infusion catheter output, and directly flow through the external connection tube 3 of the indwelling needle, the relay tube 2 and the delivery catheter 1, and finally enter the blood vessel through the needle section 12. The liquid-stop buckle 4 is at the position of the relay pipe 2 to control the flow of liquid, such as blood or medicinal liquid.

Therefore, through the implementation of the present utility model, the enhanced effect is that by adding the liquid-stop buckle that can control the flow of liquid, such as blood or medicinal liquid, on the relay tube of the indwelling needle, the When the indwelling needle is inserted into the blood vessel, it can provide timely hemostatic effect. In addition, when the medical institution encounters an accident, the patient can use the hemostatic buckle to cut off the delivery of the fluid in real time, so as to gain time for the patient to escape, which is unprecedented for similar products. See an excellent structure.

What is disclosed in the utility model is a kind of preferred embodiment, and any partial change or modification originating from the technical idea of the utility model and the content easily deduced by those skilled in the art will not deviate from the patent of the utility model scope of rights.

Claims (9)

1. a kind of remaining needle, it is characterised in that including：

One delivery conduit, its rear is with a tapered portion, the soft pin section that the axially extending confession flow liquid in the tapered portion front end passes through, And rear end then forms one and connects hole；

One relay pipe, it is the body of flexible recovery, and the relay pipe one end is fixed in this and connect in hole, and is communicated in the conveying Conduit；

One extension tube attached, its axial direction is opened up for the affixed perforate with connecting of the relay pipe other end, and back segment outer peripheral face is provided with one First external thread section；And

One stops liquid clasp, and it is included on front side of a U-shaped body, the body and rear side is provided with a pair of the through holes worn for the relay pipe, The bodies top opening integrally extends a buckling piece, and the buckling piece is optionally buckled in what the body inner upstanding wall was oppositely arranged One clasp, and project relative with the horizontal interior walls of the body of the buckling piece bottom surface can form a pair of open close control to the relay pipe Press from both sides tenon.

2. remaining needle as claimed in claim 1, it is characterised in that pin section front radially opens up multiple guide holes.

3. remaining needle as claimed in claim 2, it is characterised in that the multiple guide hole is included in a pair first shifted to install Guide hole and a pair of second guide holes.

4. remaining needle as claimed in claim 1, it is characterised in that the delivery conduit is the pipe that soft polymer material is made Body, the relay pipe is the body that elastic polymer material is made, and the body that the extension tube attached is then made for hard high polymer material.

5. remaining needle as claimed in claim 4, it is characterised in that the delivery conduit is the body that polypropylene is made, the relaying The body being made for silica gel is managed, and the extension tube attached is then the body that polyvinyl chloride is made.

6. remaining needle as claimed in claim 1, it is characterised in that the relay pipe and the extension tube attached using flush type ejection formation as One strip body.

7. remaining needle as claimed in claim 1, it is characterised in that further comprise a sting device, the sting device includes：

One puncture needle, it has an elongate hollow needle body, and the needle body two ends are respectively equipped with a hollow pinhead and a needle stand；And

One tampon, its front end is bolted in the extension tube attached provided with an internal seat ring with an internal thread segment, the internal thread segment First external thread section, makes the tampon be fixed in the extension tube attached, and the axially extended pluggable perforate back segment in seat ring center An insertion pipe, the insertion pipe rear connects a bore, a plug being made up of elastic polymer material is arranged in the bore；Should Needle body passes through the tampon, the extension tube attached, the relay pipe and the delivery conduit, and the syringe needle is exposed into pin section front end.

8. remaining needle as claimed in claim 7, it is characterised in that further comprise a needle guard, the needle guard rear end is provided with one the Two external thread sections；Wherein the needle guard is optionally socketed on the taper of the delivery conduit according to the use state of the remaining needle Portion, or second external thread section are bolted in the internal thread segment of the tampon, to coat the syringe needle.

9. remaining needle as claimed in claim 7, it is characterised in that the sting device further comprises a frenulum, the frenulum two End has the first set hole for being socketed on the tampon respectively, and is socketed on one second set of hole of the needle stand.