CN211433196U

CN211433196U - Disposable medical catheter needle

Info

Publication number: CN211433196U
Application number: CN201922139346.0U
Authority: CN
Inventors: 赵利权
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-09-08
Anticipated expiration: 2029-12-03

Abstract

The utility model relates to a disposable medical catheter needle, which comprises a steel needle component, a catheter component and a rubber sleeve component; the catheter component is clamped in the rubber sleeve component and inserted in the steel needle component; the catheter component comprises a catheter, an extension tube, an infusion joint and a clamping sleeve; the guide pipe is vertically inserted in the clamping sleeve, and one end of the guide pipe is connected with the infusion joint through an extension pipe; the inner side of the upper end of the cutting sleeve is also provided with a first bayonet; the rubber sleeve component comprises a conical pipe sleeve, and one end of the pipe sleeve is sealed and fixed through a rubber plug; the other end of the pipe sleeve is provided with a through hole, and a second bayonet is fixedly arranged on the outer side of the through hole; the catheter assembly is fixed through a second bayonet of the first bayonet clamped in the rubber sleeve assembly. The disposable medical catheter needle has a simple structure, and the success rate of the disposable medical catheter needle is improved by arranging the catheter in the steel tube; the design of a short steel needle is adopted, so that the design is more humanized; the semi-circular needle body is adopted, so that the contact area with the skin is increased, the skin pressure is reduced, and the stability of the whole operation is improved.

Description

Disposable medical catheter needle

Technical Field

The utility model belongs to the technical field of medical facility's technique and specifically relates to a disposable medical catheter needle.

Background

With the continuous development of society, the medical industry has been rapidly developed. In the medical industry, a variety of different medical facilities are often used; wherein the trocar is an important component thereof. The catheter needles currently used have the following drawbacks: the handle parts of the dressing are round, and after the dressing is pasted and fixed and is pressed, the comfort level is poor, and even more, the pressure sore phenomenon can occur; the steel needle of the existing trocar, no matter the trocar is of a common type or a safe puncture-proof type, needs to be pulled out and is lost to a sharp device garbage can, the operation process has the risks of puncture and scratch, the steel needle of the trocar applied to the body of an infectious disease patient can carry the blood of the patient, and belongs to a high-risk infection source, and a large number of cases of infection are caused by puncture of the puncture needle head every year in China; the existing trocar is mature through years of clinical practice, the puncture technology of the same general medical staff is skillful, the success rate is high, however, in the clinical work, backflow blood can be seen during puncture, but the hose cannot be fed into a blood vessel, so that puncture failure is finally caused, hematoma and bruise are generated for the very serious patients, particularly the old patients, the diabetics, the patients with very hard blood vessel wall after long-term chemotherapy and the patients with very thin and fragile blood vessel puncture difficulty are caused, physical and mental pain of the patients and waste of trocar consumables are caused, and the economic burden of the patients is increased, so the success rate needs to be continuously improved through a new design; the existing trocar needs a hose with enough length to be sent into a blood vessel, so that the steel needle is designed to be very long, and psychological pressure and fear can be brought to a patient during operation; fifth, the existing trocars adopt the design that a soft cannula is wrapped outside a steel needle, and careful observation shows that the distance from the front section of the hose to the needle point bevel is several millimeters, and the needle point bevel also has the length of several millimeters, so that in the puncture operation, the needle point bevel pierces the blood vessel wall, the backflow blood does not represent that the hose enters the blood vessel, a small amount of needle re-insertion with good blood vessel conditions can feed the hose into the blood vessel, the needle re-insertion is not allowed due to poor blood vessel conditions (thin, fragile, rolling and the like), and the phenomenon of 'the hose cannot be fed due to the backflow blood' can occur at a very high probability at the moment, and finally the puncture fails.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: in order to solve the problems in the background technology, the disposable medical catheter needle is provided, the structure is simple, and the success rate is improved by arranging the catheter in the steel tube; the design of a short steel needle is adopted, so that the design is more humanized; the semi-circular needle body is adopted, so that the contact area with the skin is increased, the skin pressure is reduced, the stability of the whole operation is improved, and the needle is convenient to widely popularize and use.

The utility model provides a technical scheme that its technical problem adopted is: a disposable medical catheter needle comprises a steel needle assembly, a catheter assembly and a rubber sleeve assembly; the catheter component is clamped in the rubber sleeve component and inserted in the steel needle component; the catheter component comprises a catheter, an extension tube, an infusion joint and a clamping sleeve; the guide pipe is vertically inserted into the clamping sleeve, and one end of the guide pipe is connected with the infusion joint through an extension pipe; the inner side of the upper end of the cutting sleeve is also provided with a first bayonet; the rubber sleeve component comprises a conical pipe sleeve, and one end of the pipe sleeve is fixed in a sealing manner through a rubber plug; the other end of the pipe sleeve is provided with a through hole, and a second bayonet is fixedly arranged on the outer side of the through hole; the catheter assembly is fixed through the second bayonet of the first bayonet clamped in the rubber sleeve assembly.

Further, in the above technical solution, the steel needle assembly includes a steel needle and a needle handle; one side of the end part of the steel needle is fixedly arranged through a needle handle.

Further, in the above technical solution, the pipe sleeve includes a conical portion and a cylindrical portion; the conical part is communicated with the cylindrical part, and the end part of the conical part is sealed by a rubber plug; one end of the columnar part is also provided with a bayonet in the clamping groove along the circumferential direction.

Further limiting, in the technical scheme, a needle handle notch is formed in the pipe sleeve on one side of the through hole, and the needle handle notch is in a conical structure along the length direction of the pipe sleeve and is used for moving operation of the steel needle assembly.

Further, in the above technical solution, the cross section of the columnar portion is a cylindrical structure with a flat bottom.

The utility model has the advantages that: the utility model provides a disposable medical catheter needle, which has simple structure, and improves the success rate of the catheter through arranging the catheter in the steel tube; the design of a short steel needle is adopted, so that the design is more humanized; the semi-circular needle body is adopted, so that the contact area with the skin is increased, the skin pressure is reduced, the stability of the whole operation is improved, and the needle is convenient to widely popularize and use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the steel needle of the present invention in the state of insertion;

FIG. 2 is a schematic structural view of the utility model in which the steel needle is fixed by withdrawing to the notch of the needle handle at the tail part;

FIG. 3 is a schematic view of a catheter assembly of the present invention;

FIG. 4 is a schematic structural view of the middle rubber sleeve assembly of the present invention;

FIG. 5 is a schematic structural view of a steel needle assembly according to the present invention;

FIG. 6 is a schematic cross-sectional view of the insertion state of the steel needle assembly of the present invention;

fig. 7 is a schematic view of the positioning section of the retracted steel needle assembly of the present invention.

The reference numbers in the drawings are: 1. the infusion device comprises a catheter, 2, an extension tube, 3, an infusion connector, 4, a clamping sleeve, 5, a first bayonet, 6, a tube sleeve, 7, a rubber plug, 8, a through hole, 9, a second bayonet, 10, a steel needle, 11, a needle handle, 12, a conical part, 13, a cylindrical part, 14, a clamping groove inner bayonet, 15 and a needle handle notch.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-7, a disposable medical catheter needle is shown, which comprises a steel needle assembly, a catheter assembly and a rubber sleeve assembly; the catheter component is clamped in the rubber sleeve component and inserted in the steel needle component; the catheter component comprises a catheter 1, an extension tube 2, an infusion joint 3 and a cutting sleeve 4; the guide pipe 1 is vertically inserted into the cutting sleeve 4, and one end of the guide pipe 1 is connected with the infusion joint 3 through the extension pipe 2; the inner side of the upper end of the cutting sleeve 4 is also provided with a first bayonet 5; the rubber sleeve component comprises a conical pipe sleeve 6, and one end of the pipe sleeve 6 is sealed and fixed through a rubber plug 7; the other end of the pipe sleeve 6 is provided with a through hole 8, and a second bayonet 9 is fixedly arranged outside the through hole 8; the catheter assembly is fixed through the second bayonet 9 of the first bayonet 5 clamped in the rubber sleeve assembly.

Wherein, the steel needle assembly comprises a steel needle 10 and a needle handle 11; one side of the end part of the steel needle 10 is fixedly arranged through a needle handle 11. The sleeve 6 comprises a conical portion 12 and a cylindrical portion 13; the conical part 12 is communicated with the cylindrical part 13, and the end part of the conical part 12 is sealed by the rubber plug 7; one end of the columnar part 13 is also provided with a clamping groove inner bayonet 14 along the circumferential direction. One side of the through hole 8 is positioned on the pipe sleeve 6 and is provided with a needle handle notch 15, and the needle handle notch 15 is in a conical structure along the length direction of the pipe sleeve 6 and is used for moving operation of the steel needle assembly. The columnar portion 13 is of a cylindrical configuration with a flat bottom section.

The use principle of the disposable medical catheter needle is as follows:

firstly, when medical staff needs to prick a needle to take blood or transfuse; the needle handle 11 in the steel needle assembly is pushed, so that the steel needle 10 slides on the catheter 1 until the steel needle is pushed to completely surround the front end of the catheter 1, the needle handle 11 is held by a hand to prick the needle, when the needle is pricked in place, the reflux liquid pushes the catheter assembly forwards, and the catheter is fed into a blood vessel and then clamped by the first bayonet 5 and the bayonet in the clamping groove; the steel needle assembly is withdrawn through the needle handle 11 until the end part of the steel needle 10 in the steel needle assembly is withdrawn into the rubber plug 7, and the needle handle 11 is clamped in the needle handle notch 15, so that the phenomenon that the steel needle is missed to prick a person due to external force pushing again is prevented; the catheter 1 is effectively used for blood sampling or transfusion.

This application has following advantage for traditional catheter needle: 1. the steel needle 10 is internally provided with the drawable catheter 1, so that the success rate can be greatly improved. 2. The steel needle 10 is clamped inside the needle body, the needle does not need to be pulled out, and the needle puncture injury is thoroughly avoided. 3. The short steel needle is more humanized. 4. The semi-cylindrical needle body has larger and more comfortable skin contact area and reduces the skin pressure. 5. Simple structure, reliability stability is high.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A single use medical catheter needle characterized by: comprises a steel needle component, a catheter component and a rubber sleeve component; the catheter component is clamped in the rubber sleeve component and inserted in the steel needle component; the catheter component comprises a catheter, an extension tube, an infusion joint and a clamping sleeve; the guide pipe is vertically inserted into the clamping sleeve, and one end of the guide pipe is connected with the infusion joint through an extension pipe; the inner side of the upper end of the cutting sleeve is also provided with a first bayonet; the rubber sleeve component comprises a conical pipe sleeve, and one end of the pipe sleeve is fixed in a sealing manner through a rubber plug; the other end of the pipe sleeve is provided with a through hole, and a second bayonet is fixedly arranged on the outer side of the through hole; the catheter assembly is fixed through the second bayonet of the first bayonet clamped in the rubber sleeve assembly.

2. A single use medical catheter needle as claimed in claim 1, wherein: the steel needle assembly comprises a steel needle and a needle handle; one side of the end part of the steel needle is fixedly arranged through a needle handle.

3. A single use medical catheter needle as claimed in claim 1, wherein: the pipe sleeve comprises a conical part and a cylindrical part; the conical part is communicated with the cylindrical part, and the end part of the conical part is sealed by a rubber plug; one end of the columnar part is also provided with a bayonet in the clamping groove along the circumferential direction.

4. A single use medical catheter needle as claimed in claim 3, wherein: one side of the through hole is positioned on the pipe sleeve and is provided with a needle handle notch, and the needle handle notch is in a tapered structure along the length direction of the pipe sleeve and is used for moving operation of the steel needle assembly.

5. A single use medical catheter needle as claimed in claim 3, wherein: the section of the columnar part is a cylindrical structure with a plane bottom.