CN215537306U

CN215537306U - Indwelling needle

Info

Publication number: CN215537306U
Application number: CN202120491680.7U
Authority: CN
Inventors: 石旎
Original assignee: Tongji Medical College of Huazhong University of Science and Technology
Current assignee: Tongji Medical College of Huazhong University of Science and Technology
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2022-01-18
Anticipated expiration: 2031-03-08

Abstract

The utility model belongs to the technical field of infusion medical instruments, and particularly discloses an indwelling needle which comprises a needle body and an infusion hose. The needle body is of a through structure, puncture rubber is arranged in the middle of the needle body, the upper end of the puncture rubber is an oblique cut surface, a liquid injection cavity is formed in an inner cavity of the needle body in front of the oblique cut surface, a liquid inlet pipe is connected to the side wall of the liquid injection cavity, and a liquid inlet of the liquid inlet pipe is located at the rear end of the liquid injection cavity; the transfusion hose is arranged at the front end of the needle body. The liquid injection cavity is adjusted by arranging the inclined plane, so that the accumulation of impurities is avoided, and the risk of forming microthrombus and blocking the tube is reduced; through setting up the guide for the puncture is gone on more easily.

Description

Indwelling needle

Technical Field

The utility model belongs to the technical field of infusion medical instruments, and particularly relates to an indwelling needle.

Background

The indwelling needle is a common medical instrument in nursing work, has convenient use and the function of reducing the puncture times of patients, thereby reducing repeated puncture during clinical transfusion, reducing puncture pain of patients and workload of clinical nursing staff, and having wide application in the current clinic.

The conventional indwelling needle disclosed in CN102641529B generally includes: puncture needle, needle tubing and infusion catheter. When the puncture needle is used, firstly, a user inserts the puncture needle communicating needle tube into the injection position of a patient, then, the indwelling needle tube is guided into the blood vessel of the patient through the puncture needle, and finally, the puncture needle is drawn out, so that the indwelling needle tube is remained in the blood vessel of the patient and is fixed by the application film. When in use, a transfusion tube is inserted into the remaining needle tube for transfusion.

However, impurities are easy to remain in the injection cavity part of the existing indwelling needle, so that micro thrombus is easy to form after blood clots in blood are retained, the tube is blocked, and the transfusion risk of a patient is increased. The prior puncture needle is easy to deflect in the puncture process and is not provided with a guide mechanism.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides an indwelling needle which mainly solves the problems that the existing indwelling needle is easy to cause microthrombus and pipe blockage, a puncture needle is not provided with a guide mechanism and the like.

In order to solve the problems, the utility model adopts the following technical scheme:

an indwelling needle comprising

The needle body is of a through structure, the middle part of the needle body is provided with puncture rubber, the upper end of the puncture rubber is a bevel cut surface,

the inner cavity of the needle body in front of the inclined plane is provided with a liquid injection cavity, the side wall of the liquid injection cavity is connected with a liquid inlet pipe, a liquid inlet of the liquid inlet pipe is positioned at the rear end of the liquid injection cavity,

the transfusion built-in tube is arranged at the front end of the needle body.

In some modes, a guide part is arranged in the inner cavity of the needle body behind the puncture rubber, and a guide hole is formed in the middle of the guide part in a penetrating mode.

In some modes, the front end of the needle body is provided with a corresponding hole, and the infusion built-in tube is communicated with the corresponding hole.

In some forms, the liquid inlet direction of the liquid inlet pipe is the same as the direction of the inclined plane.

In some forms, the chamfer is parallel to the direction of the liquid inlet pipe.

In some forms, the chamfer provides a smaller inside diameter at the rear end of the infusion chamber than at the front end of the infusion chamber.

In some forms, the infusion set tube is a hollow structure.

In some modes, the puncture needle further comprises a puncture part, and the puncture part can penetrate through the guide hole and the infusion built-in tube.

In some forms, the chamfer is concave in the middle to form a concave arc surface.

In some modes, the middle part of the chamfer surface is concave 0.4-0.7 mm.

The utility model has the beneficial effects that:

1. the inclined plane is arranged to adjust the liquid injection cavity, so that the retention of impurities is avoided, and the risk of forming microthrombus and blocking the tube is reduced;

2. through setting up the guide for the puncture is gone on more easily.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a standby state of the present invention;

FIG. 3 is a schematic view of a usage state of the present invention;

FIG. 4 is a perspective and schematic view of the housing of the present invention;

fig. 5 is a schematic diagram illustrating a problem of the prior art.

In the figure:

100 needle bodies, 110 puncture rubber, 111 inclined planes, 120 guide pieces, 130 liquid injection cavities, 140 front end conical cavities, 141 pilot holes, 200 transfusion built-in pipes, 300 liquid inlet pipes, 400 puncture needles and 410 puncture parts.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

as shown in FIG. 1, an indwelling needle includes

The needle body 100 is of a through structure, the middle of the needle body is provided with puncture rubber 110, the upper end of the puncture rubber 110 is a chamfered surface 111, the chamfered surface 111 is obliquely arranged relative to the rear end surface of the puncture rubber 110, and further the chamfered surface 111 is not perpendicular to the needle body 100 and has an acute included angle as required;

in conjunction with the illustration of fig. 2, the needle has not yet fully advanced at this point. The inner cavity of the needle body 100 in front of the inclined plane 111 is provided with a liquid injection cavity 130, the side wall of the liquid injection cavity 130 is connected with a liquid inlet pipe 300, and a liquid inlet 310 of the liquid inlet pipe 300 is positioned at the rear end of the liquid injection cavity 130;

the rear end of the injection cavity 130 is wedge-like, and in some embodiments, the chamfered surface 111 makes the inner diameter of the rear end of the injection cavity 130 smaller than the inner diameter of the front end of the injection cavity 130.

An infusion tube 200 provided at the front end of the needle body 100; in the using process, the infusion built-in tube is placed into a blood vessel of a human body. During lancing, some blood will flow back into the infusion chamber 130.

As shown in figure 5, the existing rubber is not provided with a chamfer, so that the part A of the liquid injection cavity, which is far away from the liquid inlet pipe, is not easy to be washed by liquid, after the liquid pressure is balanced, the part A is hydraulically balanced with other parts, and impurities, blood return and the like are easy to be remained at the part A.

When liquid is in the pipe, the liquid flows in the pipe, and the substance in the part A is mixed with the flowing liquid and is removed, namely the hydraulic pressure in the pipe is greater than the hydraulic pressure in the part A.

With reference to fig. 4, a guide 120 is disposed in the inner cavity of the needle body 100 behind the puncture rubber 110, and a guide hole is disposed through the middle of the guide 120. The puncture needle can smoothly move forward along the guide hole as shown in fig. 3, and the problem of deflection is not easily caused when the puncture rubber 110 is punctured.

The front end of the needle body 100 is provided with a corresponding hole 141, and the transfusion built-in tube 200 is communicated with the corresponding hole 141; thereby further guiding the puncture needle to puncture through the puncture rubber 110, so that the puncture needle can smoothly enter the infusion built-in tube 200.

Referring to fig. 4, in a specific configuration, the liquid inlet pipe 300 is provided with a liquid inlet direction in the same direction as the inclined plane 111. Therefore, liquid can flow forwards along the inclined plane 111 when being fed, the existence of the part A is reduced, the risk of material retention is reduced, and the liquid can flow forwards directly to the infusion built-in pipe 200. Make the body middle part not have the easy A portion that is detained of material, detain the material and can move together with liquid, be difficult for causing to be detained.

The inclined plane 111 is parallel to the direction of the liquid inlet pipe 300.

With reference to fig. 2 and 3, the puncture needle can move forward, and the infusion set tube 200 has a through structure.

The puncture needle 400 is further included, the puncture needle 400 comprises a puncture part 410, and the puncture part 410 can penetrate through the guide hole and the infusion built-in tube 200.

In some embodiments, the middle of the chamfer 111 is concave to form a concave arc surface, so that after the liquid enters from the liquid inlet 310, the liquid has a moving convolution effect along the concave surface, and the probability of material deposition is further reduced.

When needed, the middle part of the chamfer surface 111 is concave 0.4-0.7 mm.

The front end of the inner cavity of the needle body 100 is a front end conical cavity 140, and the front end is internally contracted and connected with an infusion built-in tube 200; the front end is designed to be conical, so that puncture can be better performed.

It will be apparent to those skilled in the art that various modifications may be made to the above embodiments without departing from the general spirit and concept of the utility model. All falling within the scope of protection of the present invention. The protection scheme of the utility model is subject to the appended claims.

Claims

1. The indwelling needle is characterized in that: comprises that

The needle body (100) is of a through structure, the middle part of the needle body is provided with puncture rubber (110), the upper end of the puncture rubber (110) is a bevel cut surface (111),

a liquid injection cavity (130) is formed in the inner cavity of the needle body (100) in front of the inclined plane (111), a liquid inlet pipe (300) is connected to the side wall of the liquid injection cavity (130), and a liquid inlet (310) of the liquid inlet pipe (300) is positioned at the rear end of the liquid injection cavity (130); and

an infusion built-in tube (200) arranged at the front end of the needle body (100).

2. The indwelling needle according to claim 1, wherein: a guide piece (120) is arranged in an inner cavity of the needle body (100) behind the puncture rubber (110), and a guide hole is formed in the middle of the guide piece (120) in a penetrating mode.

3. The indwelling needle according to claim 2, wherein: the front end of the needle body (100) is provided with a corresponding hole (141), and the transfusion built-in tube (200) is communicated with the corresponding hole (141).

4. The indwelling needle according to claim 1, wherein: the liquid inlet direction of the liquid inlet pipe (300) is the same as the direction of the inclined plane (111).

5. The indwelling needle according to claim 4, wherein: the inclined cutting plane (111) is parallel to the direction of the liquid inlet pipe (300).

6. The indwelling needle according to claim 4, wherein: the inclined plane (111) enables the inner diameter of the rear end of the liquid injection cavity (130) to be smaller than the inner diameter of the front end of the liquid injection cavity (130).

7. The indwelling needle according to claim 2, wherein: the transfusion built-in tube (200) is of a through structure.

8. The indwelling needle according to claim 7, wherein: the puncture needle (400) comprises a puncture part (410), and the puncture part (410) can penetrate through the guide hole and the infusion built-in tube (200).

9. The indwelling needle according to claim 1, wherein: the middle part of the chamfer surface (111) is concave inwards to form a concave arc surface.

10. The indwelling needle according to claim 9, wherein: the middle part of the chamfer surface (111) is concave 0.4-0.7 mm.