CN212879495U

CN212879495U - Deep vein puncture needle

Info

Publication number: CN212879495U
Application number: CN202020668737.1U
Authority: CN
Inventors: 王�义
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2021-04-06
Anticipated expiration: 2030-04-28

Abstract

The utility model belongs to the technical field of medical instrument, concretely relates to dark vein pjncture needle, include: the end head of the steel needle is provided with a needle core; the sheath is arranged on the steel needle, a tearing part is arranged at the end part of the sheath, and when the steel needle retreats, the sheath retreats through the tearing part; the one-way control valve is arranged at the position, far away from the needle core, of the sheath and is used for controlling the bleeding volume during venipuncture. In the utility model, the one-way control valve is added on the sheath, so that the problems of more bleeding, difficult control and easy pollution to the puncture area after puncture are avoided; through increasing the one-way control valve on the sheath, and then the puncture back, the hemorrhage is all inside the sheath basically, effective control bleeding volume, can not pollute puncture art region. The utility model discloses in, because the one-way control valve is in the sheath, effectively utilize the intrathecal space, improved space utilization.

Description

Deep vein puncture needle

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to dark vein pjncture needle.

Background

The central venipuncture is widely applied clinically, is an indispensable treatment measure in clinic, is mainly used for blood transfusion, fluid infusion, venous nutrition, central venous pressure monitoring, emergency treatment of critically ill patients and the like, and has been expanded to aspects of hemodialysis, chemotherapy of tumor patients, intracardiac pacing, body cavity effusion drainage and the like along with the continuous improvement of the technology, so that the puncture needle is widely applied in clinical work.

The conventional puncture step is to puncture by using a thick puncture needle after a thin needle penetrates a probe position so as to improve the success rate of puncture. However, in clinical practice, when the puncture needle penetrates into a deep vein, after the needle core is withdrawn, the amount of bleeding is large, more blood returns are generated, and the control is difficult, so that blood loss is caused, and an operation area is polluted, especially for a newborn baby.

In view of the above problems, related patent publications have been disclosed.

Through search, the Chinese patent application number is 2010202228448, the application date is: 6/1/2010, patent name: disposable deep vein puncture trocar. The disposable deep venipuncture trocar of the application comprises a puncture needle and an outer sheath, wherein the front end of the puncture needle is arranged to be an inclined plane, a needle seat is arranged at the rear part of the puncture needle, the outer sheath is a hollow tube body, the inner diameter of the outer sheath is matched with the outer diameter of the puncture needle, the outer sheath is sleeved on the puncture needle and can move along the puncture needle, the outer sheath extends out of the front part of the puncture needle, a sheath seat is arranged at the tail part of the outer sheath and is connected on the needle seat at the rear part of the puncture needle, and the application has high puncture success rate, but after the puncture needle is drawn out.

In view of the above, there is a need for an improved prior art needle that solves the above problems.

Disclosure of Invention

The utility model aims to solve the problems that the blood output is large after the needle core is drawn out and the blood return is not easy to control when the puncture needle performs venipuncture in the prior art, and provides a deep venipuncture needle.

Realize the utility model discloses the technical scheme of purpose as follows:

a deep vein puncture needle comprising:

the end head of the steel needle is provided with a needle core;

the sheath is arranged on the steel needle, a tearing part is arranged at the end part of the sheath, and when the steel needle retreats, the sheath retreats through the tearing part;

the one-way control valve is arranged at the position, far away from the needle core, of the sheath and is used for controlling the bleeding volume during venipuncture.

In the utility model, the one-way control valve is added on the sheath, so that the problems of more bleeding, difficult control and easy pollution to the puncture area after puncture are avoided; through increasing the one-way control valve on the sheath, and then the puncture back, the hemorrhage is all inside the sheath basically, effective control bleeding volume, can not pollute puncture art region. The utility model discloses in, because the one-way control valve is in the sheath, effectively utilize the intrathecal space, improved space utilization.

As a further improvement of the utility model, the one-way control valve comprises a one-way flap, the one-way flap is formed by an elastic membrane, and is followed the inner wall of the sheath, the elastic membrane is tightly attached to the inner wall of the sheath. The elastic membrane has the characteristics of elasticity and controllability, and is used as a one-way control valve, so that the control is convenient, the pressure is not particularly high in general bleeding, and the blocking effect can be realized through a simple structure. Specifically, the elastic film may be a PE film, a PET film, and a TPU film.

As a further improvement of the present invention, the elastic membrane is two, two the elastic membrane is followed the central axis symmetry of the sheath is arranged on the inner wall of the sheath, forming the elastic blocking portion with an opening. In order to ensure the outflow of blood after puncturing, an opening needs to be increased, and if the stopper is used directly, blood cannot flow and puncturing cannot be performed.

As a further improvement of the present invention, the elastic membrane forms a blocking arc, which is disposed toward the stylet along an inner wall of the sheath. Towards the nook closing member, and then set up towards bleeding initial source, and then can improve the blockking to blood, be convenient for form and block.

As a further improvement of the utility model, the opening is an expanding opening with gradually increasing width from the direction of being close to the stylet to being far away from the stylet. The expanding opening, blood can flow out through this less opening this moment promptly, and the department's bore that flows out is little, and the bore grow after flowing out avoids causing the jam in the sheath.

As a further improvement, the utility model also comprises an observation window which is arranged on the sheath wall and in front of the one-way control valve, the observation window is used for observing the amount of bleeding to judge whether the puncture position is correct. Through increasing the observation window, the medical personnel of being convenient for directly see out, whether puncture position is correct, avoids the medical accident that still puncture caused after the maloperation.

As a further improvement of the utility model, the observation window comprises a transparent transition part and a transparent observation port arranged above the transparent transition part. Through setting up transparent observation window, can see whether have the blood that returns, and then judge whether puncture into the blood vessel.

As a further improvement of the utility model, the transparent viewing port slope set up in transparent transition portion top, just the bottom and the transparent changeover portion top of transparent viewing port meet.

As a further improvement of the utility model, one end of the transparent observation port is provided with a porous plugging part for the plugging of the bleeding in the venipuncture. Because in the puncture, must have blood to flow out, increase porous jam portion, it can be with blood absorption, avoids blood direct outflow, specifically, can choose for use gauze, sponge etc..

As a further improvement of the utility model, the other end of the transparent viewing port is connected with a nut cap through screw threads. If the needle is not contaminated during the puncture, the puncture attempt can be made more than once, and at this time, the cap can be opened, the sheath can be flushed, and the puncture attempt can be continued.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a dark vein puncture needle sets up the blood return window and sets up one-way lamella in sheath seat inner wall a week through setting up on the sheath seat of puncture needle sheath, and the effectual vein puncture position of finding out accuracy under the less condition of blood loss volume of having guaranteed.

(2) The utility model discloses a dark vein puncture needle sets up the blood return window into transparent tubular structure, and will return blood window observation part one end opening setting, can observe the volume of filling blood in the blood return window and judge whether the puncture is accurate, after accurate judgement, in time to the opening part stop up the better stanch of considering the sky nature such as absorbent cotton, gauze or bandage, both can guarantee that blood pressure balance has effectively stanchs.

(3) The utility model discloses a dark vein pjncture needle specifically sets up one-way lamella into the arc surface of evagination, and is connected towards by the little opening that the arc surface formed one side of sheath for the mouth of pipe department bore in the skin outside reduces, the effectual speed that reduces the blood outflow, and then reaches hemostatic effect.

Drawings

FIG. 1 is a schematic view of the structure of the puncture needle of the present invention;

wherein, 1, a needle core; 2. a sheath; 3. an observation window; 4. a one-way control valve; 5. a steel needle; 6. a tear-off portion; 7. a transparent transition portion; 8. a transparent viewing port; 9. a porous plugging portion; 10. and (7) capping.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

Example 1

Referring to fig. 1, in the present embodiment, a deep vein puncture needle includes:

the needle comprises a steel needle 5, wherein the end head of the steel needle 5 is provided with a needle core 1;

the sheath 2 is sleeved on the steel needle 5, a tearing part 6 is arranged at the end part of the sheath 2, and when the steel needle 5 retreats, the sheath 2 retreats through the tearing part 6;

the one-way control valve 4 is arranged at the position, far away from the needle core 1, of the sheath 2, and the one-way control valve 4 is used for controlling the blood volume during venipuncture.

In the utility model, the one-way control valve 4 is added on the sheath 2, so as to avoid the problems of more bleeding, difficult control and easy pollution to the puncture area after puncture; through increasing the one-way control valve on the sheath, and then the puncture back, the hemorrhage is all inside the sheath basically, effective control bleeding volume, can not pollute puncture art region. The utility model discloses in, because the one-way control valve is in the sheath, effectively utilize the intrathecal space, improved space utilization.

Example 2

In this embodiment, the structure of the check valve 4 will be described with emphasis.

Referring to fig. 1, the one-way control valve 4 comprises a one-way flap formed by an elastic membrane disposed against the inner wall of the sheath 2 along the inner wall of the sheath 2. The elastic membrane has the characteristics of elasticity and controllability, and is used as a one-way control valve, so that the control is convenient, the pressure is not particularly high in general bleeding, and the blocking effect can be realized through a simple structure.

Specifically, the elastic film may be a PE film, a PET film, and a TPU film.

Furthermore, the number of the elastic membranes is two, and the two elastic membranes are symmetrically arranged on the inner wall of the sheath 2 along the central axis of the sheath to form an elastic blocking part with an opening. In order to ensure the outflow of blood after puncturing, an opening needs to be increased, and if the stopper is used directly, blood cannot flow and puncturing cannot be performed.

Further, the elastic membrane forms a barrier arc disposed along the inner wall of the sheath toward the stylet. Towards the nook closing member, and then set up towards bleeding initial source, and then can improve the blockking to blood, be convenient for form and block.

Further, the opening is an expansion-type opening with gradually increasing width from the direction close to the needle core to the direction far away from the needle core. The expanding opening, blood can flow out through this less opening this moment promptly, and the department's bore that flows out is little, and the bore grow after flowing out avoids causing the jam in the sheath.

Example 3

As a further improvement, in this embodiment, the purpose of being convenient for observe the bleeding condition and further judging whether the puncture position is correct is achieved.

Specifically, referring to fig. 1, the puncture needle further comprises an observation window 3 which is arranged on the wall of the sheath 2 and in front of the one-way control valve 4, wherein the observation window 3 is used for observing the amount of bleeding so as to judge whether the puncture position is correct. Through increasing observation window 3, the medical personnel of being convenient for directly see out, whether puncture position is correct, avoid still puncturing the medical malpractice that causes behind the maloperation.

Further, the viewing window 3 comprises a transparent transition 7 and a transparent viewing port 8 arranged above the transparent transition 7. Through transparent changeover portion 7, increase transparent viewing aperture 8 after, transparent viewing aperture 8 observes again, and the result is more accurate to judge the volume of bleeding after the puncture, provide the reference for concluding whether puncture is successful from this.

Further, the transparent viewing port 8 is obliquely arranged above the transparent transition part 7, and the bottom of the transparent viewing port 8 is connected with the transparent transition section top part 7. The transition is connected, and the integrated production can be realized during the actual production.

Furthermore, one end of the transparent observation port 8 is provided with a porous blocking part 9 for blocking bleeding in venipuncture. Because in the puncture, must have blood to flow out, increase porous jam portion, it can be with blood absorption, avoids blood direct outflow, specifically, can choose for use gauze, sponge etc..

Further, a cap 10 is screwed on the other end of the transparent viewing port 8. The cap 10 is detachably arranged at the end part of the transparent viewing port in a clamping or threaded connection mode.

When the puncture position is wrong, if the puncture needle is not polluted, the cover cap can be opened, and the sheath can be washed, so that the puncture can be performed again.

Example 4

Referring to fig. 1, the deep vein puncture needle of the present invention comprises a steel needle 5 with a core 1 and a sheath 2; specifically, the sheath 2 is a hollow tube structure, a sheath seat is arranged at the tail of the sheath 2, the sheath seat is a hollow tube structure, the diameter of the sheath seat is larger than that of the sheath 2, and an observation window 3 is integrally arranged on the sheath 2; the observation window 3 comprises a transparent transition part 7 and a transparent observation port 8, both of which are tubular structures, one end of the transparent transition part 7 is vertically connected to the wall of the sheath seat, the other end of the transparent transition part is connected with the wall of the transparent observation port 8, the transparent observation port 8 and the sheath 2 form a certain inclination angle, and one end of the transparent observation port 8, which is open, is sealed; a one-way control valve 4 consisting of one-way valves is further arranged in the sheath 2, and the one-way valves are circumferentially arranged on the inner wall of the sheath; the stylet 1 sequentially penetrates through the sheath seat and the sheath 2 until the front end of the stylet 1 extends out of the front end of the sheath 2.

In the prior art, in the case of the skilled venipuncture, the puncture person presses the front end of the puncture part with a finger and realizes the purpose of hemostasis by pressing for 5-10 minutes, and the blood flow of the venous blood vessel is larger than that of other venous blood vessels, so the action effect is not ideal.

The dark vein pjncture needle of this scheme, when carrying out the vein puncture, when taking out steel needle 5 and nook closing member 1, have a large amount of blood to gush out, it is too much to return the blood, sets up observation window 3 and sets up one-way control valve 4 at sheath seat inner wall through the sheath seat at puncture needle sheath 2, the effectual hemostatic effect that has played, and its principle is, adopts one-way control valve 4, and the pipe diameter of keeping away from skin one end with the sheath seat reduces, makes the speed of blooding slow down.

Meanwhile, when the venous blood vessel needs to be punctured, when the blood filling amount in the blood return window is large, medical staff can determine whether the puncturing is accurate or not by judging the congestion condition, and at the moment, whether the puncturing is accurate or not can be judged under the condition of little blood loss.

In addition, the observation window 3 is integrally arranged on the wall of the sheath 2, so that the production is convenient.

Further, the observation window 3 is a transparent tubular structure, and when puncturing is performed, one end of the opening of the observation part of the observation window 3 is blocked by absorbent cotton, gauze or a bandage.

The observation window aims to observe whether the blood vessel is accurately punctured into the vein through the blood return amount, the blood flowing speed is low due to more blood volume, but the blood pressure is high, the blood can be filled into the blood return window, the blood return window is designed to be of a transparent tubular structure, whether the puncture is accurate or not can be conveniently judged by observing the blood volume in the blood return window in the puncture process, meanwhile, one end of an observation part of the blood return window is provided with an opening, the blood can conveniently flow into the blood return window, after the accurate judgment, the opening is timely blocked by liquid stopping objects with good filtering performance such as absorbent cotton, gauze or bandage, and the like, so that the blood pressure balance can be ensured, and the blood can be effectively stopped.

Specifically, the one-way control valve 4 is a one-way flap which is a convex arc surface, a small opening formed by the arc surface faces to one side of the sheath 2, and the diameter of the small opening is larger than the outer diameter of the stylet 1 and smaller than the inner diameter of the sheath seat.

The one-way valve is arranged to be a convex arc surface, and the small opening formed by the arc surface faces to one side of the sheath, so that the caliber of the opening at the outer side of the skin is reduced, the blood outflow speed is effectively reduced, and the hemostatic effect is achieved.

The diameter of the small opening is set to be larger than the outer diameter of the needle core and smaller than the inner diameter of the sheath seat, so that the needle core can smoothly pass through the sheath.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A deep vein puncture needle, comprising:

the end head of the steel needle is provided with a needle core;

2. A deep vein puncture needle according to claim 1, wherein said one-way control valve comprises a one-way flap formed by an elastic membrane disposed against an inner wall of said sheath along said inner wall of said sheath.

3. A deep vein puncture needle according to claim 2, wherein there are two said elastic membranes, and two said elastic membranes are symmetrically disposed on the inner wall of the sheath along the central axis of said sheath, forming an elastic blocking portion with an opening.

4. A deep vein puncture needle according to claim 3, wherein said elastic membrane forms a blocking arc, said blocking arc being disposed along the inner wall of the sheath toward the core.

5. A deep vein puncture needle according to claim 4, wherein said opening is a flared opening with gradually increasing width from the proximal end of the needle core to the distal end of the needle core.

6. The deep vein puncture needle according to claim 1, further comprising an observation window provided on the sheath wall and in front of the one-way control valve, wherein the observation window is used for observing the amount of bleeding to determine whether the puncture position is correct.

7. A deep vein puncture needle according to claim 6, wherein said viewing window comprises a transparent transition portion and a transparent viewing port disposed above the transparent transition portion.

8. A deep vein puncture needle according to claim 7, wherein the transparent viewing port is disposed obliquely above the transparent transition portion, and the bottom of the transparent viewing port is connected to the top of the transparent transition portion.

9. A deep vein puncture needle according to claim 8, wherein one end of said transparent viewing port is provided with a porous blocking portion for blocking bleeding during vein puncture.

10. A deep vein puncture needle according to claim 9, wherein a cap is screwed to the other end of the transparent observation port.