CN211534712U

CN211534712U - Disposable safety internal fistula cannula puncture needle

Info

Publication number: CN211534712U
Application number: CN202020084438.3U
Authority: CN
Inventors: 林艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-09-22
Anticipated expiration: 2030-01-15

Abstract

The utility model discloses a disposable safe internal fistula sleeve puncture needle, which comprises a soft needle component, a dialysis tube component and a hard needle component, wherein the dialysis tube component is communicated with the soft needle component, and the hard needle component is detachably matched with the dialysis tube component; the hard needle assembly comprises a hard needle, a safety buckle and a hard needle wing, the needle head of the hard needle penetrates through the safety buckle and is fixed in the hard needle wing, and the needle point of the hard needle sequentially penetrates through the dialysis tube assembly and the soft needle assembly and extends out of the soft needle assembly; the hard needle is provided with a deformation part which extends towards the circumferential direction of the hard needle and protrudes out of the surface of the hard needle, and the length from the deformation part to the needle point is less than that of the safety buckle; the two ends of the safety buckle are respectively provided with a first through hole for the hard needle to pass through, and a limiting part for limiting the deformation part of the hard needle in the safety buckle is arranged in the safety buckle and corresponds to the first through hole; after the puncture needle is withdrawn, the needle head of the hard needle can be withdrawn into the safety buckle and limited in the safety buckle, so that medical personnel can be prevented from being punctured, and the use is safe.

Description

Disposable safety internal fistula cannula puncture needle

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to disposable safe internal fistula sleeve puncture needle.

Background

The passage between artery and vein is called arteriovenous internal fistula, and the autoarteriovenous internal fistula directly anastomoses the artery and the vein, and blood comes out of the artery and returns back from the vein, does not pass through the capillary network in front, and directly returns to atrium. The arteriovenous internal fistula has the advantages that the blood vessel can provide sufficient blood for hemodialysis treatment, and guarantee is provided for the sufficiency of the hemodialysis treatment, so that the arteriovenous internal fistula is a common surgical operation in the hemodialysis treatment. After 4 to 6 weeks of arteriovenous internal fistula operation, venous arterialization occurs, the diameter of a blood vessel is thickened, the thickness of a blood vessel wall is thickened, the blood flow is increased, and dialysis puncture can be performed by the three characteristics.

The puncture needle needs to be used in dialysis puncture, all is disposable steel needle at present using, and medical personnel adopt this kind of steel needle to carry out the internal fistula puncture, moves back the needle after the dialysis is accomplished, and the syringe needle is contaminated by patient's blood, and medical personnel are moving back the needle or when the clearance abandons the indwelling needle, are stabbed easily by the syringe needle and infect the disease.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims at providing a disposable safe internal fistula sleeve puncture needle.

The utility model adopts the technical proposal that:

the disposable safe internal fistula cannula puncture needle comprises a soft needle assembly, a dialysis tube assembly and a hard needle assembly, wherein the dialysis tube assembly is communicated with the soft needle assembly, and the hard needle assembly is detachably matched with the dialysis tube assembly; the hard needle assembly comprises a hard needle, a safety buckle and a hard needle wing, the needle head of the hard needle penetrates through the safety buckle and is fixed in the hard needle wing, and the needle point of the hard needle sequentially penetrates through the dialysis tube assembly and the soft needle assembly and extends out of the soft needle assembly; the hard needle is provided with a deformation part which extends towards the circumferential direction of the hard needle and protrudes out of the surface of the hard needle, and the length from the deformation part to the needle point is less than that of the safety buckle; the two ends of the safety buckle are respectively provided with a first through hole for the hard needle to pass through, and a limiting part for limiting the deformation part of the hard needle in the safety buckle is arranged in the safety buckle and corresponds to the first through hole.

Furthermore, the limiting part is made of steel sheets, one end of the limiting part is fixed in the safety buckle, the other end of the limiting part moves close to or away from the first through hole under the action of external force, and at least partially covers the first through hole when the limiting part is close to the first through hole.

Further, still include the screening glass, this screening glass is U type structure, be equipped with the mounting groove that is used for installing the screening glass in the safety knot, screening glass fixed mounting is in this mounting groove, offers the second through-hole that supplies the hard needle to pass corresponding to first through-hole on the screening glass, spacing portion is installed on the screening glass.

Furthermore, be equipped with the buckle on the screening glass, this screening glass passes through the buckle to be fixed in the mounting groove.

Furthermore, a hard needle guide groove is arranged in the safety buckle and along the length direction of the safety buckle.

Furthermore, the safety buckle comprises a safety buckle body and a safety buckle cover body, and the safety buckle cover body is fixed on the safety buckle body.

Further, the soft needle assembly comprises a soft needle, a soft needle seat, a soft needle catheter and soft needle wings, the soft needle is installed at one end of the soft needle seat, the soft needle catheter is installed at the other end of the soft needle seat, and the soft needle wings are sleeved on the periphery of the soft needle catheter.

Further, the dialysis tube component comprises a three-way tube, a blood guide tube and an isolation plug, wherein a first connector end of the three-way tube is communicated with the soft needle catheter, the blood guide tube is connected to a second connector end of the three-way tube, and the isolation plug is plugged at a third connector end of the three-way tube.

Furthermore, the surface of the soft needle seat is provided with a mark.

Furthermore, an adjusting clamp for opening or closing the blood vessel passage is arranged on the blood vessel.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

this application pjncture needle is the cannula type, establishes soft needle subassembly at hard needle subassembly overcoat, and hard needle is the steel needle, is favorable to the puncture and introduces soft needle, and after the puncture was accomplished, hard needle withdraws from, and soft needle stays in patient's blood vessel, is favorable to protecting patient's blood vessel, avoids the swelling that hard needle arouses. Set up the deformation portion on hard needle, this deformation portion transverse dimension is greater than the transverse dimension of the all the other positions of hard needle, establish safety buckle through the cover on hard needle, safety buckle internal fixation sets up the spacing portion that can restrict the deformation portion of hard needle in safety buckle, when moving back the needle, the deformation portion of hard needle moves back to safety buckle in, because spacing portion is to the limiting displacement of hard needle deformation portion, the deformation portion of hard needle is restricted in safety buckle, because the length of hard needle deformation portion to needle point is less than the length of safety buckle, consequently this application pjncture needle is moving back the needle after, the syringe needle of hard needle can move back in safety buckle and be restricted in safety buckle, prevent to stab medical personnel, high safety in utilization.

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 embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural view of a disposable safety internal fistula cannula puncture needle according to an embodiment of the application;

FIG. 2 is a schematic structural view of a soft needle assembly according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a dialysis tube assembly according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a state of the hard needle assembly according to the embodiment of the present application;

FIG. 5 is a schematic structural view of another state of the hard needle assembly according to the embodiment of the present application;

FIG. 6 is a schematic view of the structure of a protective sheet according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a safety buckle cover body according to an embodiment of the application.

The soft needle comprises a hard needle 1, a deformation part 11, a soft needle 2, a soft needle seat 21, a mark 211, a soft needle catheter 3, a soft needle wing 4, a needle wing connecting pipe 41, an isolating plug 5, a three-way pipe 6, a first interface end 61, a second interface end 62, a third interface end 63, a blood guide pipe 7, an adjusting clamp 71, a safety buckle 8, a first through hole 81, a protective sheet 82, a limiting part 821, a buckle 822, a second through hole 823, a guide groove 83, a connecting hole 84, an installation groove 85, a safety buckle cover body 86, a guide column 861, a connecting column 862, a hard needle wing 9, a hard needle seat 91 and a handle 92.

Detailed Description

Here, it is to be noted that the functions, methods, and the like related to the present invention are only conventional adaptive applications of the related art. Therefore, the present invention is an improvement of the prior art, which substantially lies in the connection relationship between hardware, not in the functions and methods themselves, that is, the present invention relates to a few functions and methods, but does not include the improvements proposed in the functions and methods themselves. The present invention is described for better illustration of the function and method for better understanding of the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Referring to fig. 1, 4 and 5, the disposable safety internal fistula cannula puncture needle comprises a soft needle assembly, a dialysis tube assembly and a hard needle assembly, wherein the dialysis tube assembly is communicated with the soft needle assembly, and the hard needle assembly is detachably matched with the dialysis tube assembly; the hard needle assembly comprises a hard needle 1, a safety buckle 8 and a hard needle wing 9, the needle head of the hard needle 1 penetrates through the safety buckle 8 and is fixed in the hard needle wing 9, and the needle tip of the hard needle 1 sequentially penetrates through the dialysis tube assembly and the soft needle assembly; the hard needle 1 is provided with a deformation part 11 which extends towards the circumferential direction of the hard needle and protrudes out of the surface of the hard needle, and the length from the deformation part 11 to the needle point is less than that of the safety buckle 8; the two ends of the safety buckle 8 are respectively provided with a first through hole 81 for the hard needle 1 to pass through, and a limiting part 821 for limiting the deformation part 11 of the hard needle 1 in the safety buckle 8 is arranged in the safety buckle 8 and corresponding to the first through hole 81.

This application pjncture needle is the cannula type, establishes soft needle subassembly at hard needle subassembly overcoat, and hard needle 1 is the steel needle, and in hard needle 1 inserted soft needle 2, soft needle 2 laminated in hard needle 1 periphery basically, is favorable to the puncture and leads to soft needle 2, and after the puncture was accomplished, hard needle 1 withdrawed from, and soft needle 2 stays in patient's blood vessel, is favorable to protecting patient's blood vessel, avoids the swelling that hard needle 1 arouses. Set up deformation portion 11 on hard needle 1, this deformation portion 11 lateral dimension is greater than the lateral dimension of the rest positions of hard needle 1, through establish safety buckle 8 on hard needle 1, safety buckle 8 internal fixation sets up can be with the deformation portion 11 restriction in safety buckle 8 of hard needle 1 spacing portion 821 in, when withdrawing the needle, the deformation portion 11 of hard needle 1 moves back to in the safety buckle 8, because spacing portion 821 is to the limiting effect of hard needle 1 deformation portion 11, the deformation portion 11 of hard needle 1 is restricted in safety buckle 8, because the length of hard needle 1 deformation portion 11 to the needle point is less than the length of safety buckle 8, therefore this application pjncture needle is withdrawing the back, the syringe needle of hard needle 1 can move back in safety buckle 8 and be restricted in safety buckle 8, prevent to stab medical personnel, high safety in utilization.

Referring to fig. 2, in one embodiment, the soft needle assembly includes a soft needle 2, a soft needle base 21, a soft needle catheter 3, and a soft needle wing 4, the soft needle 2 is installed at one end of the soft needle base 21, the soft needle catheter 3 is installed at the other end of the soft needle base 21, and the soft needle wing 4 is sleeved on the periphery of the soft needle catheter 3.

Specifically, the soft needle wing 4 includes a wing connecting tube 41 and wing handles located at two sides of the wing connecting tube 41, and the wing connecting tube 41 is sleeved on the periphery of the soft needle catheter 3.

By arranging the soft needle wing 4 with the needle wing handle, the puncture needle can be conveniently fixed and prevented from falling off after the puncture is finished.

Referring to fig. 3, in one embodiment, the dialysis tubing assembly comprises a three-way tube 6, a blood conduit 7 and an isolation plug 5, wherein a first port end 61 of the three-way tube 6 is communicated with the soft needle catheter 3, the blood conduit 7 is connected with a second port end 62 of the three-way tube 6, and the isolation plug 5 blocks a third port end 63 of the three-way tube 6.

During dialysis, blood flows to the blood guide tube 7 through the soft needle 2, the soft needle seat 21, the soft needle catheter 3 and the first connector end 61 of the three-way tube 6 to enter dialysis equipment for dialysis, and the third connector end of the three-way tube 6 is plugged by the isolating plug 5 to prevent the blood from seeping.

The blood vessel 7 is further provided with an adjusting clamp 71, the adjusting clamp 71 is sleeved on the blood vessel 7, the adjusting clamp 71 is provided with a buckle part and a buckle 822 groove matched with the buckle part, and the passage of the blood vessel 7 is opened or closed by buckling the buckle part into the buckle 822 groove.

After the soft needle 2 is inserted into the blood vessel, in order to achieve the required blood flow, the insertion angle of the soft needle 2 needs to be adjusted, and for the convenience of observation, a mark 211 is fixedly arranged on the surface of the soft needle base 21, and the mark 211 can be a scale carved on the surface of the soft needle base 21, can also be a fixed block fixed on the surface of the soft needle base 21, and can also be a coating coated on the surface of the soft needle base 21 by adopting a spraying mode.

Referring to fig. 4-7, in one embodiment, the safety buckle 8 includes a safety buckle body and a safety buckle cover 86, and the safety buckle cover 86 is fixed to the safety buckle body.

Specifically, the safety buckle body is provided with a connecting hole 84 which is recessed inwards, the safety buckle cover body 86 is provided with a connecting column 862 which is matched with the connecting hole 84, and the safety buckle cover body 86 is fixed on the safety buckle body through the matching of the connecting column 862 and the connecting hole 84.

In a further embodiment, a hard needle 1 guide groove 83 is arranged along the length direction of the safety buckle body, and the hard needle 1 passes through the safety buckle body and is guided by the guide groove 83. The safety buckle cover 86 is provided with a guide post 861 matched with the guide groove 83, after the safety buckle cover 86 is buckled on the safety buckle body, the guide post 861 is embedded into the guide groove 83 to limit the hard needle 1 in the guide groove 83.

In one embodiment, the protective plate 82 is further included, the protective plate 82 is made of steel sheet, and the protective plate 82 is in a U-shaped structure. This internal mounting groove 85 that is used for installing protection sheet 82 that is equipped with of safety catch, this mounting groove 85 be with protection sheet 82 complex U type structure, protection sheet 82 installs in mounting groove 85. A second through hole 823 through which the hard needle 1 passes is formed in the protective sheet 82 corresponding to the first through hole 81, and the stopper 821 is fixed to the protective sheet 82.

Specifically, a buckle 822 is provided on the protective sheet 82, and the protective sheet 82 is fixed in the mounting groove 85 by the buckle 822.

Specifically, the limiting portion 821 is made of a steel sheet, one end of the limiting portion 821 is fixed on the protection sheet 82, the other end of the limiting portion 821 can move close to or away from the second through hole 823 under the action of external force, when the limiting portion 821 is close to the second through hole 823, the limiting portion 821 can at least cover a part of the second through hole 823, the hard needle 1 deformation portion 11 cannot pass through the second through hole 823, when the limiting portion 821 is far away from the second through hole 823, the limiting portion 823 can be opened, and the hard needle 1 deformation portion 11 can pass through the second through hole 823. The stopper 821 may be formed by cutting and bending the protection sheet 82 at a certain position.

In an exemplary embodiment, the upper end (the end close to the needle point of the hard needle 1) of the safety buckle body is provided with a first upper through hole, and the lower end (the end far away from the needle point of the hard needle 1) of the safety buckle body is provided with a second upper through hole. The protection sheet 82 comprises an upper protection section, a lower protection section and a connecting section, wherein the upper protection section and the lower protection section are connected in a U shape; screening glass 82 is vertical to be installed in mounting groove 85, and its upper end corresponding to the safety knot body is for last protection section, is for protecting the section down corresponding to the lower extreme of safety knot body, offers the second that corresponds to first last through-hole on last protection section, offers the second that corresponds to first through-hole under on protecting the section down and passes through-hole under. Two stopper portions 821 are provided, which are an upper stopper portion 821 attached corresponding to the second upper through hole and a lower stopper portion 821 attached corresponding to the second lower through hole. In order to fix the position of the protection sheet 82 in the mounting groove 85, the connecting section and the lower protection section of the protection sheet 82 are both provided with a buckle 822, the buckle 822 extends from one side of the protection sheet 82 to a direction far away from the protection sheet 82 and bends to the other side, the buckle 822 and the protection sheet 82 are in a U-shaped structure, and after the protection sheet 82 is mounted in the mounting groove 85, the buckle 822 is clamped in the mounting groove 85.

In one embodiment, the needle wing 9 includes a hard needle seat 91 and a handle 92 connected to the hard needle seat 91, the hard needle seat 91 is a hollow structure, and has a receiving space for receiving the safety buckle 8 therein, the needle head of the hard needle 1 is fixed in the receiving space, the safety buckle 8 is sleeved on the hard needle 1, and the safety buckle 8 can slide between the needle head of the hard needle 1 and the deformation portion 11.

The hard needle wing 9 is arranged, so that needle insertion and needle withdrawal are facilitated. When withdrawing the needle, holding the safety buckle 8 with one hand and the hard needle base 91 with the other hand to slowly withdraw the hard needle 1; since the deformation part 11 protrudes from the surface of the hard needle 1, after passing through the first upper through hole and the second upper through hole, it contacts the upper limit part 821 and makes it rotate in the direction away from the second upper through hole, and the deformation part 11 and the needle point are easy to retreat into the safety buckle 8; when the deformation portion 11 retreats to the lower limit portion 821, the larger lateral dimension thereof causes the lower limit portion 821 to move toward the direction close to the second lower through hole, and partially or completely cover the second lower through hole, so that the deformation portion 11 cannot retreat from the second lower through hole and remain in the safety buckle 8, thereby ensuring the safety of the puncture needle and preventing the medical staff from being punctured.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral combinations thereof; may be an electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, system, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, systems, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The disposable safe internal fistula cannula puncture needle is characterized by comprising a soft needle assembly, a dialysis tube assembly and a hard needle assembly, wherein the dialysis tube assembly is communicated with the soft needle assembly, and the hard needle assembly is detachably matched with the dialysis tube assembly; the hard needle assembly comprises a hard needle (1), a safety buckle (8) and a hard needle wing (9), the needle head of the hard needle (1) penetrates through the safety buckle (8) and is fixed in the hard needle wing (9), and the needle point of the hard needle (1) sequentially penetrates through the dialysis tube assembly and the soft needle assembly and extends out of the soft needle assembly; the hard needle (1) is provided with a deformation part (11) which extends towards the circumferential direction of the hard needle and protrudes out of the surface of the hard needle, and the length from the deformation part (11) to the needle point is less than that of the safety buckle (8); the two ends of the safety buckle (8) are respectively provided with a first through hole (81) for the hard needle (1) to pass through, and a limiting part (821) for limiting the deformation part (11) of the hard needle (1) in the safety buckle (8) is arranged in the safety buckle (8) corresponding to the first through hole (81).

2. The disposable safety fistula cannula puncture needle according to claim 1, wherein the limiting part (821) is made of steel sheet, one end of the limiting part (821) is fixed in the safety buckle (8), the other end of the limiting part moves close to or away from the first through hole (81) under the action of external force, and at least partially covers the first through hole (81) when the limiting part is close to the first through hole (81).

3. The disposable safety internal fistula cannula puncture needle according to claim 2, further comprising a protection sheet (82), wherein the protection sheet (82) is of a U-shaped structure, an installation groove (85) for installing the protection sheet (82) is formed in the safety buckle (8), the protection sheet (82) is fixedly installed in the installation groove (85), a second through hole (823) for the hard needle (1) to pass through is formed in the protection sheet (82) corresponding to the first through hole (81), and the limiting part (821) is installed on the protection sheet (82).

4. The disposable safety fistula cannula puncture needle according to claim 3, wherein the protective sheet (82) is provided with a buckle (822), and the protective sheet (82) is fixed in the mounting groove (85) through the buckle (822).

5. The disposable safety internal fistula cannula puncture needle according to claim 1, wherein a hard needle guide groove (83) is formed in the safety buckle (8) along the length direction of the safety buckle (8).

6. The disposable safety internal fistula cannula puncture needle according to claim 1, wherein the safety buckle (8) comprises a safety buckle body and a safety buckle cover body (86), and the safety buckle cover body (86) is fixed on the safety buckle body.

7. The disposable safety internal fistula cannula puncture needle according to any one of claims 1 to 6, wherein the soft needle assembly comprises a soft needle (2), a soft needle base (21), a soft needle catheter (3) and a soft needle wing (4), the soft needle (2) is arranged at one end of the soft needle base (21), the soft needle catheter (3) is arranged at the other end of the soft needle base (21), and the soft needle wing (4) is sleeved on the periphery of the soft needle catheter (3).

8. The disposable safety internal fistula cannula puncture needle as set forth in claim 7, wherein the dialysis tube assembly comprises a three-way tube (6), a blood conduit (7) and an isolation plug (5), the first interface end (61) of the three-way tube (6) is communicated with the soft needle catheter (3), the blood conduit (7) is connected with the second interface end (62) of the three-way tube (6), and the isolation plug (5) is plugged at the third interface end (63) of the three-way tube (6).

9. The disposable safety internal fistula cannula puncture needle as set forth in claim 7, wherein the soft needle holder (21) is provided with markings (211) on its surface.

10. The disposable safety fistula cannula puncture needle according to claim 8, wherein the blood vessel (7) is provided with an adjusting clip (71) for opening or closing the passage of the blood vessel (7).