CN210408395U

CN210408395U - Artery puncture needle

Info

Publication number: CN210408395U
Application number: CN201920895156.9U
Authority: CN
Inventors: 张春雷; 王钦娴
Original assignee: Hebei Provincial Hospital Of Traditional Chinese Medicine
Current assignee: Hebei Provincial Hospital Of Traditional Chinese Medicine
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-04-28
Anticipated expiration: 2029-06-14

Abstract

The utility model relates to an artery puncture needle, which comprises an indwelling needle and a puncture needle inserted in the indwelling needle, wherein the indwelling needle comprises a catheter base, an indwelling needle catheter arranged at the front end of the catheter base and a pressure measuring joint arranged at the rear end of the catheter base, the catheter base is a square shell with an opening at the bottom, a cylindrical extrusion block is arranged in the catheter base, the extrusion block is coaxially arranged with the indwelling needle catheter and the pressure measuring joint, the extrusion block is made of a high-elasticity material with reversible deformation, the middle part of the extrusion block is provided with a through hole along the axis, a rubber tube is arranged in the through hole, two ends of the rubber tube are respectively communicated with the indwelling needle catheter and the pressure measuring joint, and an extrusion device for compressing the extrusion block is arranged in the catheter base; the puncture needle comprises a puncture needle seat, side wings arranged on two sides of the puncture needle seat and a puncture needle tube arranged at the front end of the puncture needle seat.

Description

Artery puncture needle

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to an artery pjncture needle.

Background

Clinically, for critically ill operation patients or intensive care patients, blood pressure needs to be continuously monitored, invasive blood pressure detection is generally adopted, namely, an arterial indwelling needle is inserted into an artery and then connected with an arterial pressure measuring device to measure the change of arterial blood pressure in real time. The existing common artery indwelling needle is an artery indwelling needle (20G x 45mm) of 'BD' company, and the artery indwelling needle consists of a stainless steel needle, an indwelling needle and a needle tube sleeve, wherein the stainless steel needle consists of a needle body, a needle seat and a handle, the needle body is a common stainless steel needle tube, is hard, the front end of the needle body is a needle point, and is easy to puncture, the needle seat is positioned at the tail end of the stainless steel needle tube, and the handle is arranged on the needle seat; the indwelling needle consists of an indwelling needle catheter, a catheter seat and a blood flow blocking valve, wherein the indwelling needle catheter is a transparent plastic tube, is softer and is suitable for being left in a blood vessel for a long time, the indwelling needle catheter is sleeved outside a stainless steel needle tube and is about 1mm shorter than the stainless steel needle tube, and the blood flow blocking valve is arranged on the catheter seat and opens or closes an inner cavity channel of the catheter seat through the front-back sliding of the indwelling needle catheter; the needle tube sleeve is sleeved outside the indwelling needle catheter and is slightly longer than the stainless steel needle tube, and is used for protecting the indwelling needle catheter and the stainless steel needle tube. The combination of the stainless steel needle, the indwelling needle and the needle tube sleeve is characterized in that the stainless steel needle tube penetrates through the inner cavity of the catheter seat of the indwelling needle to be inserted into the indwelling needle catheter, the needle seat is inserted into the tail end of the catheter seat, the handle is clamped on two sides of the needle seat of the indwelling needle, and the needle tube sleeve is sleeved outside the indwelling needle catheter.

When the blood pressure measuring device is used, the needle tube sleeve is taken down, the stainless steel needle tube and the indwelling needle catheter are inserted into an arterial blood vessel together according to the conventional method, the blood flow blocking valve is arranged at the opening position, if blood returns in the catheter seat channel, the needle head of the stainless steel needle tube is inserted into the arterial blood vessel, the stainless steel needle is drawn out, the blood flow blocking valve is closed to block the blood flow, the tail end of the catheter seat is connected with the arterial pressure measuring device through the connecting tube, and the change of the blood pressure in the artery can be observed immediately.

However, such an arterial indwelling needle has the following drawbacks: 1) although the blood flow blocking valve is closed to block the blood flow, the blood cannot be completely prevented from overflowing from the tail end of the catheter seat in the actual operation, and blood spraying and pollution are easily caused in the time difference between the closing of the blood flow blocking valve and the drawing of the stainless steel needle, especially the blood of an infectious disease patient; 2) the blood flow blocking valve realizes the opening and closing of the channel of the inner cavity of the catheter seat through the forward and backward sliding, the indwelling needle is easy to have instant impact when sliding, the indwelling needle is easy to deeply penetrate into the body to cause the pain of a patient when being pushed forwards, and the indwelling needle catheter is easy to be separated from an arterial vessel when being pulled backwards; 3) when the stainless steel needle and the indwelling needle catheter are inserted into an arterial vessel, if the blood flow blocking valve is in the open position, the stainless steel needle and the indwelling needle catheter are easy to separate and difficult to insert, and if the blood flow blocking valve is in the closed position, the stainless steel needle is slightly deformed under the action of the blood flow blocking valve, so that the use is influenced.

In view of the above problems, the utility model provides an artery puncture needle with simple structure and convenient use, through the extrusion block and the extrusion device that set up the rubber material, realized blocking of conduit seat passageway, when keeping somewhere needle pipe and puncture needle tubing and inserting the artery, compress tightly the extrusion block through the extrusion device, it is difficult to separate to keep somewhere needle pipe and puncture needle tubing, when puncture needle tubing extracts, need not to loosen the extrusion device, directly take out can, under the pressure effect, the rubber tube in the middle part of the extrusion block can be shriveled, realize blocking of conduit seat passageway, avoided the emergence of blood jet; the extrusion device adopts a specially designed synchronous extrusion mechanism, and the upper pressing plate and the lower pressing plate synchronously approach to the middle part of the extrusion block, so that the puncture needle tube is prevented from deforming under the action of pressure when the passage of the catheter seat is blocked; the extrusion device is compressed through the screw rod, so that blood flow blocking is realized, and instant impact on the remaining needle when the catheter seat channel is opened and closed is avoided.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide an artery puncture needle with simple structure, small impact, good blood blocking effect, convenient use and safety.

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

an artery puncture needle comprises an indwelling needle and a puncture needle inserted in the indwelling needle, wherein the indwelling needle comprises a catheter base, an indwelling needle catheter arranged at the front end of the catheter base and a pressure measuring connector arranged at the rear end of the catheter base, the catheter base is a square shell with an opening at the bottom, a cylindrical extrusion block is arranged in the catheter base, the extrusion block is coaxially arranged with the indwelling needle catheter and the pressure measuring connector, the extrusion block is made of a high-elasticity material with reversible deformation, a through hole is formed in the middle of the extrusion block along the axis, a rubber tube is arranged in the through hole, two ends of the rubber tube are respectively communicated with the indwelling needle catheter and the pressure measuring connector, and an extrusion device for compressing the extrusion block is arranged in the catheter base;

the puncture needle comprises a puncture needle seat, side wings arranged on two sides of the puncture needle seat and a puncture needle tube arranged at the front end of the puncture needle seat.

As a further improvement of the present invention, the extrusion device comprises an upper pressing plate disposed above the extrusion block and a lower pressing plate disposed below the extrusion block, wherein two groups of synchronous extrusion mechanisms are disposed between the upper pressing plate and the lower pressing plate and symmetrically disposed on two sides of the upper pressing plate; a screw rod is vertically arranged above the upper pressing plate, a threaded hole matched with the screw rod is formed in the top of the conduit seat, and the bottom of the screw rod is hinged with the top of the conduit seat.

As a further improvement, the upper press plate and the lower press plate are provided with guide blocks, and the guide grooves matched with the guide blocks are vertically arranged on the two side walls of the conduit seat.

As a further improvement of the present invention, the synchronous extrusion mechanism includes two connecting rods which are arranged between the upper pressing plate and the lower pressing plate in a crossed manner, a fixing shaft is arranged in the middle of the two connecting rods, and the fixing shaft is fixedly arranged on the inner side wall of the conduit seat; the two ends of the connecting rod are hinged with sliding blocks, sliding grooves matched with the sliding blocks are formed in the inner sides of the upper pressing plate and the lower pressing plate, and the sliding blocks are clamped in the sliding grooves.

As a further improvement, the synchronous extrusion mechanism inboard is equipped with the side shield, the side shield through the erection column set firmly in on the pipe seat inside wall.

As a further improvement of the present invention, the connecting rod is provided with a bearing between the fixed shafts.

As a further improvement, the utility model is provided with a cushion block between the middle parts of the connecting rods, and the cushion block sleeve is arranged on the fixed shaft.

As a further improvement of the utility model, the extrusion block is made of rubber.

As a further improvement of the utility model, the top of the screw rod is provided with a handle.

As a further improvement of the utility model, the puncture needle device also comprises a needle tube sleeve, the needle tube sleeve is arranged outside the indwelling needle catheter and the puncture needle tube.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the utility model provides an artery puncture needle, through extrusion piece and the extrusion device who sets up the rubber material, blocking of conduit seat passageway has been realized, when keeping somewhere needle pipe and puncture needle tubing and inserting the artery, compress tightly the extrusion piece through the extrusion device, it is difficult for separating to keep somewhere needle pipe and puncture needle tubing, when puncture needle tubing extracts, need not to loosen the extrusion device, directly take out can, under the pressure effect, the rubber tube at extrusion piece middle part can be shriveled, realize blocking of conduit seat passageway, the emergence of blood jet has been avoided. The extrusion device adopts a specially designed synchronous extrusion mechanism, and the upper pressing plate and the lower pressing plate are synchronously closed to the middle part of the extrusion block, so that the puncture needle tube is prevented from deforming under the action of pressure when a catheter seat channel is blocked. The extrusion device is compressed through the screw rod, so that blood flow blocking is realized, and instant impact on the remaining needle when the catheter seat channel is opened and closed is avoided.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic top view of the present invention.

Fig. 2 is a schematic sectional view at a-a in fig. 1.

Fig. 3 is a schematic sectional view at B-B in fig. 2.

Fig. 4 is a schematic structural view of the indwelling needle of the present invention.

Fig. 5 is a schematic structural view of the middle puncture needle of the present invention.

Wherein: the device comprises a catheter base 1, a guide groove 1-1, an indwelling needle catheter 2, a pressure measuring joint 3, an upper pressure plate 4, a lower pressure plate 5, a connecting rod 6, a fixed shaft 7, a sliding block 8, a side baffle 9, a mounting column 10, a screw rod 11, a handle 12, an extrusion block 13, a rubber tube 13-1, a cushion block 14, a sliding groove 15, a guide block 16, a puncture needle base 17, a puncture needle tube 18 and a side wing 19.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following description of the present invention with reference to the accompanying drawings and specific embodiments is provided for clarity and completeness.

An arterial puncture needle as shown in fig. 1-5 comprises an indwelling needle and a puncture needle inserted therein, wherein the indwelling needle comprises a catheter holder 1, an indwelling needle catheter 2 arranged at the front end of the catheter holder 1 and a pressure measuring connector 3 arranged at the rear end of the catheter holder 1, and the pressure measuring connector 3 is used for connecting with an arterial pressure measuring device. The catheter holder 1 is a square shell with an opening at the bottom, a cylindrical extrusion block 13 is arranged in the catheter holder 1, two ends of the extrusion block 13 are in contact with the inner wall of the catheter holder 1, the extrusion block 13 is made of a high-elasticity material with reversible deformation, and in the embodiment, the extrusion block 13 is made of rubber. The extrusion block 13, the indwelling needle catheter 2 and the pressure measuring connector 3 are coaxially arranged, a through hole is formed in the middle of the extrusion block 13 along the axis, a rubber tube 13-1 is arranged in the through hole, and in the embodiment, the outer wall of the rubber tube 13-1 is bonded on the side wall of the through hole. Two ends of the rubber tube 13-1 are respectively communicated with the indwelling needle catheter 2 and the pressure measuring connector 3, and an extrusion device for compressing the extrusion block 13 is arranged in the catheter seat 1.

The puncture needle comprises a puncture needle seat 17, side wings 19 arranged on two sides of the puncture needle seat 17 and a puncture needle tube 18 arranged at the front end of the puncture needle seat 17. The artery puncture needle also comprises a needle tube sleeve which is sleeved outside the indwelling needle catheter 2 and the puncture needle tube 18 and is slightly longer than the puncture needle tube 18, and the artery puncture needle is used for protecting the indwelling needle catheter 2 and the puncture needle tube 18 and preventing the puncture needle tube 18 from accidentally pricking and injuring people.

Through the extrusion block 13 and the extrusion device which are made of rubber materials, the blocking of the channel of the catheter seat 1 is realized (namely, the rubber tube 13-1 is blocked), when the indwelling needle catheter 2 and the puncture needle tube 18 are inserted into an artery, the extrusion block 13 is compressed through the extrusion device, the indwelling needle catheter 2 and the puncture needle tube 18 are not easy to separate, when the puncture needle tube 18 is pulled out, the extrusion device is not required to be loosened, the direct extraction can be carried out, the rubber tube 13-1 in the middle of the extrusion block 13 can be compressed under the action of pressure, the blocking of the channel of the catheter seat 1 is realized, and the occurrence of blood spraying is avoided.

The extrusion device comprises an upper pressing plate 4 arranged above an extrusion block 13 and a lower pressing plate 5 arranged below the extrusion block 13, wherein the upper pressing plate 4 and the lower pressing plate 5 are symmetrically arranged relative to the extrusion block 13, a synchronous extrusion mechanism is arranged between the upper pressing plate 4 and the lower pressing plate 5, the synchronous extrusion mechanism is provided with two groups, and the two groups are symmetrically arranged on two sides of the upper pressing plate 4. A screw rod 11 is vertically arranged above the upper pressing plate 5, a threaded hole matched with the screw rod 11 is formed in the top of the catheter base 1, the bottom of the screw rod 11 is clamped at the top of the catheter base 1 and can freely rotate by taking the axis of the screw rod 11 as a shaft, and a handle 12 is arranged at the top of the screw rod 11. Guide blocks 16 are arranged on two sides of the upper pressing plate 4 and the lower pressing plate 5, guide grooves 1-1 matched with the guide blocks 16 are vertically formed in two side walls of the conduit seat 1, and the upper pressing plate 4 and the lower pressing plate 5 are guaranteed to slide up and down along the vertical direction. The extrusion device is compressed by the screw rod 11 to block blood flow, so that instant impact on the remaining needle when the channel of the catheter seat 1 is opened and closed is avoided.

The synchronous extrusion mechanism comprises two connecting rods 6 which are arranged between the upper pressing plate 4 and the lower pressing plate 5 in a crossed mode, a fixed shaft 7 penetrates through the middle of the two connecting rods 6, the fixed shaft 7 is fixedly arranged on the side wall of the inner portion of the guide pipe seat 1, and a bearing is arranged between the connecting rods 6 and the fixed shaft 7. The two ends of the connecting rod 6 are hinged with sliding blocks 8, sliding grooves 15 matched with the sliding blocks 8 are formed in the inner sides of the upper pressing plate 4 and the lower pressing plate 5, and the sliding blocks 8 are clamped in the sliding grooves 15. The inner side of the synchronous extrusion mechanism is provided with a side baffle 9, and the side baffle 9 is fixedly arranged on the inner side wall of the conduit seat 1 through a mounting column 10. A cushion block 14 is arranged between the middle parts of the two connecting rods 6, and the cushion block 14 is sleeved on the fixed shaft 7. The extrusion device adopts a specially designed synchronous extrusion mechanism, the upper pressing plate 4 and the lower pressing plate 5 are synchronously closed to the middle part of the extrusion block, and the puncture needle tube 18 is prevented from deforming under the action of pressure when the channel of the catheter holder 1 is blocked.

The specific use method comprises the following steps:

firstly, a puncture needle is inserted into a channel of the indwelling needle, the handle 12 is rotated to enable the screw rod 11 to move downwards, the screw rod 11 pushes the upper pressing plate 4 to move downwards along the guide groove 1-1, the lower pressing plate 5 synchronously moves upwards under the action of the synchronous extrusion mechanism to extrude the extrusion block 13, the extrusion block 13 is compressed and deformed to press and deform the rubber tube 13-1 in the middle part, and thus the puncture needle tube 18 is clamped.

Then, the puncture needle tube 18 and the indwelling needle catheter 2 are inserted into the arterial blood vessel, and the puncture needle is removed. Because the extrusion block 13 is made of rubber and is extruded, when the puncture needle tube 18 is separated from the rubber tube 13-1, the rubber tube 13-1 can be quickly deflated, the backflow of blood is prevented, and the blood ejection is prevented.

Finally, an arterial pressure measuring device is connected to the pressure measuring joint 3, the handle 12 is rotated reversely, the upper pressing plate 4 moves upwards along the guide groove 1-1, the lower pressing plate 5 synchronously moves downwards under the action of the synchronous extrusion mechanism, the extrusion block 13 restores to be in the original shape, and the rubber tube 13-1 is communicated again, so that arterial blood pressure is monitored.

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 it; 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 technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. An artery puncture needle is characterized by comprising an indwelling needle and a puncture needle inserted in the indwelling needle, wherein the indwelling needle comprises a catheter base (1), an indwelling needle catheter (2) arranged at the front end of the catheter base (1) and a pressure measuring connector (3) arranged at the rear end of the catheter base (1), the catheter base (1) is a square shell with an opening at the bottom, a cylindrical extrusion block (13) is arranged in the catheter base (1), the extrusion block (13) is coaxially arranged with the indwelling needle catheter (2) and the pressure measuring connector (3), the extrusion block (13) is made of a high-elasticity material with reversible deformation, a through hole is formed in the middle of the extrusion block (13) along the axis, a rubber tube (13-1) is arranged in the through hole, and two ends of the rubber tube (13-1) are respectively communicated with the indwelling needle catheter (2) and the pressure measuring connector (3), an extrusion device for compressing the extrusion block (13) is arranged in the catheter seat (1);

the puncture needle comprises a puncture needle seat (17), side wings (19) arranged on two sides of the puncture needle seat (17) and a puncture needle tube (18) arranged at the front end of the puncture needle seat (17).

2. An artery puncture needle according to claim 1, wherein the extrusion device comprises an upper pressure plate (4) arranged above the extrusion block (13) and a lower pressure plate (5) arranged below the extrusion block (13), synchronous extrusion mechanisms are arranged between the upper pressure plate (4) and the lower pressure plate (5), and two groups of synchronous extrusion mechanisms are symmetrically arranged on two sides of the upper pressure plate (4); a screw rod (11) is vertically arranged above the upper pressure plate (4), a threaded hole matched with the screw rod (11) is formed in the top of the conduit seat (1), and the bottom of the screw rod (11) is hinged with the top of the conduit seat (1).

3. An artery puncture needle according to claim 2, wherein guide blocks (16) are arranged on two sides of the upper pressure plate (4) and the lower pressure plate (5), and guide grooves (1-1) matched with the guide blocks (16) are vertically arranged on two side walls of the catheter holder (1).

4. An artery puncture needle according to claim 2, characterized in that the synchronous extrusion mechanism comprises two connecting rods (6) which are arranged between the upper pressure plate (4) and the lower pressure plate (5) in a crossed manner, a fixed shaft (7) is arranged in the middle of the two connecting rods (6) in a penetrating manner, and the fixed shaft (7) is fixedly arranged on the inner side wall of the catheter holder (1); the two ends of the connecting rod (6) are hinged with sliding blocks (8), sliding grooves (15) matched with the sliding blocks (8) are formed in the inner sides of the upper pressing plate (4) and the lower pressing plate (5), and the sliding blocks (8) are clamped in the sliding grooves (15).

5. An arterial puncture needle according to claim 4, characterized in that a side baffle (9) is arranged inside the synchronous extrusion mechanism, and the side baffle (9) is fixedly arranged on the inner side wall of the catheter seat (1) through a mounting column (10).

6. An arterial puncture needle according to claim 4, characterized in that a bearing is provided between the connecting rod (6) and the fixed shaft (7).

7. An artery puncture needle according to claim 4, characterized in that a cushion block (14) is arranged between the middle parts of the two connecting rods (6), and the cushion block (14) is sleeved on the fixed shaft (7).

8. An arterial puncture needle according to claim 1, characterized in that the squeezing block (13) is made of rubber.

9. An arterial puncture needle according to claim 2, characterized in that the top of the screw (11) is provided with a handle (12).

10. An arterial puncture needle according to claim 1, characterized by further comprising a needle cannula which is sleeved outside the indwelling needle catheter (2) and the puncture needle cannula (18).