CN114587355B

CN114587355B - Artery puncture needle capable of preventing blood from flowing reversely

Info

Publication number: CN114587355B
Application number: CN202210355063.3A
Authority: CN
Inventors: 朱霞; 何学明; 吴淑琴; 王红丽; 陈春微
Original assignee: Lianyungang Oriental Hospital
Current assignee: Lianyungang Oriental Hospital
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-10-25
Anticipated expiration: 2042-04-06
Also published as: CN114587355A

Abstract

The invention discloses an anti-blood-backflow artery puncture needle, which comprises a needle tube and a needle head, wherein a piston is connected in the needle tube in a sliding manner, a push plate is arranged in the piston, a push rod is arranged at the top of the push plate, a clamping structure for connecting the push plate and the push rod is arranged in the push rod, a through hole is formed in the bottom of the needle tube, the bottom of the through hole is communicated with the needle head, balls are arranged at the top of the through hole, an elastic element is arranged between the balls and the needle tube, an annular groove is formed in the side wall of the needle tube, a reset spring is fixedly connected in the annular groove, fixing pieces are fixedly connected to the end parts of the reset spring, ejector rods are fixedly connected to the inner sides of the fixing pieces, and the inner side ends of the ejector rods are contacted with the bottoms of the balls.

Description

Artery puncture needle capable of preventing blood from flowing reversely

Technical Field

The invention relates to the technical field of puncture needles, in particular to an arterial puncture needle capable of preventing blood from flowing reversely.

Background

Puncture, a commonly used medical operating term, is a diagnostic technique in which a puncture needle is inserted into a body cavity to extract secretions for testing, gas or contrast agents are injected into the body cavity to perform contrast examination, or medicines are injected into the body cavity. The puncture includes venipuncture and arteriopuncture, and its main purpose is to take blood for examination, blood transfusion, fluid infusion and to put in catheter for angiography.

However, the existing puncture needle cannot effectively play a role in preventing backflow, so that a patient is easily infected by collected secretion samples or backflow of blood after the blood enters the puncture needle, and the secretion samples or the backflow of the blood are difficult to remedy due to the fact that the blood flow speed of an artery is higher than that of a vein.

Based on the above, the invention designs an arterial puncture needle for preventing blood from flowing backwards, so as to solve the problems.

Disclosure of Invention

The invention aims to provide an arterial puncture needle capable of preventing blood from flowing backwards, and aims to solve the problem that the existing arterial puncture needle cannot effectively achieve the effect of preventing the blood from flowing backwards in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a prevent artery pjncture needle of blood adverse current, includes needle tubing and syringe needle, sliding connection has the piston in the needle tubing, be provided with the push pedal in the piston, the push pedal top is provided with the push rod, install the block structure that is used for connecting push pedal and push rod in the push rod, the through-hole has been seted up to the needle tubing bottom, through-hole bottom and syringe needle intercommunication, top are provided with the ball, be provided with elastic element between ball and the needle tubing, the annular has been seted up to the needle tubing lateral wall, fixedly connected with reset spring in the annular, the equal fixedly connected with stationary blade of reset spring tip, the inboard equal fixedly connected with ejector pin of stationary blade, the ejector pin medial extremity all contacts bottom the ball, through pressing the stationary blade, makes the stationary blade drive the ejector pin draw close to the center and extrude the ball and make the ball jack-up to communicate with the inside cavity of needle tubing and external world.

Preferably, the block structure includes and has a set of joint piece with push rod sliding connection, the inboard equal fixedly connected with trigger spring of joint piece, the common fixedly connected with of trigger spring and push rod fixed connection's fixed plate, sliding connection has the montant in the push rod, the montant bottom all is provided with the chamfer of mutual matching with the fast inboard top of joint.

Preferably, a mounting groove is formed in the push rod, a movable piece is connected in the mounting groove in a sliding mode, and the movable piece is fixedly connected with the vertical rod and the top of the vertical rod in a clamping mode.

Preferably, the inner wall of the push plate and the inner wall of the piston are both provided with a clamping groove with an annular structure, and the outer wall of the push plate is provided with a clamping ring with an annular structure.

Preferably, joint piece both sides all are provided with spacing piece, spacing piece sliding connection has the gag lever post, set up the straight mouthful groove and the vertical circular recess that is provided with that are used for spacing joint piece in the push rod, straight mouthful groove and circular recess are used for holding joint piece and montant respectively.

Preferably, the top of the vertical rod penetrates through the push rod and is fixedly connected with the push piece.

Preferably, the elastic element comprises a connecting sheet fixedly connected with the needle tube, a pressing spring is fixedly connected with the bottom of the connecting sheet, and a fitting piece attached with the ball is fixedly connected with the bottom of the pressing spring.

Preferably, fixedly connected with encircles the rubber ring of solid fixed ring in the annular, the spout overcoat is equipped with the guard ring, guard ring and needle tubing threaded connection.

Preferably, the side wall of the needle tube is provided with an observation port, and a transparent plate is arranged in the observation port.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, the piston is driven to move upwards by the push plate, so that the space in the needle tube is increased, the top of the ball and the through hole are communicated with the needle tube through the pressure difference between the upper side and the lower side of the ball, a sample enters the needle tube under the action of the pressure difference, once the push plate stops moving in the sampling process, the elastic element can quickly push the ball to the top of the through hole, and the sample in the needle tube cannot flow back into the human body, so that the influence of the backflow on the human body is avoided, and the problem that the conventional arterial puncture needle cannot effectively play a backflow prevention effect is solved.

2. According to the invention, before detection, the ball is jacked up through the ejector rod, so that the cavity in the needle tube is communicated with the outside, the piston is extruded downwards, a small amount of samples are extruded, after the samples are enough, the ejector rod is loosened, the ball is reset through the elastic element, the samples are prevented from flowing out again, the needle tube can be directly used as a container for submitting the samples for inspection after sampling, the samples are prevented from being injected into other containers again, the samples are prevented from being influenced by external factors, so that errors exist between sample detection data and actual data, medical workers can make correct judgment on patients, the detection accuracy is improved, the samples can be extruded for multiple times for detection, the situation that the samples need to be punctured for sampling again after single detection failure is avoided, and the pain of the patients is increased is avoided.

Drawings

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

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

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is a schematic view of the inside of the putter of the present invention in an exploded cross-section;

fig. 5 is a schematic structural diagram of the clamping block of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a needle tube; 2. a needle head; 3. a piston; 4. pushing the plate; 5. a push rod; 51. mounting grooves; 6. a snap-fit structure; 61. a clamping block; 62. a trigger spring; 63. a fixing plate; 64. a vertical rod; 65. a movable plate; 66. a snap spring; 7. a through hole; 8. a ball bearing; 9. an elastic element; 91. connecting sheets; 92. pressing down the spring; 93. fitting parts; 10. a ring groove; 11. a return spring; 12. a fixing sheet; 13. a top rod; 14. a clamping groove; 15. clamping a ring; 16. a limiting sheet; 17. a limiting rod; 18. a straight slot; 19. a circular groove; 20. pushing the sheet; 21. a rubber ring; 22. a guard ring; 23. a viewing port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution:

the utility model provides a prevent artery pjncture needle of blood adverse current, including needle tubing 1 and syringe needle 2, sliding connection has piston 3 in the needle tubing 1, be provided with push pedal 4 in the piston 3, push pedal 4 top is provided with push rod 5, install the block structure 6 that is used for connecting push pedal 4 and push rod 5 in the push rod 5, through-hole 7 has been seted up to needle tubing 1 bottom, through-hole 7 bottom and syringe needle 2 intercommunication, the top is provided with ball 8, be provided with elastic element 9 between ball 8 and the needle tubing 1, annular 10 has been seted up to 1 lateral wall of needle tubing, fixedly connected with reset spring 11 in the annular 10, the equal fixedly connected with stationary blade 12 of reset spring 11 tip, the equal fixedly connected with ejector pin 13 in stationary blade 12 inboard, ejector pin 13 medial extremity all contacts with ball 8 bottom, through pressing stationary blade 12, make stationary blade 12 drive ejector pin 13 draw close to the center and extrude ball 8 and make ball 8 jack-up, thereby communicate with the inside cavity of needle tubing 1 with the external world.

Before the use, the push rod 5 is connected with the push plate 4 through the clamping structure 6, then a medical worker pricks the needle 2 at the front end of the needle tube 1 into a human body, the push rod 5 is pulled upwards, so that the push plate 4 is pulled upwards, the space volume in the needle tube 1 is increased, the pressure is reduced, the bottom pressure of the ball 8 is unchanged, the ball 8 moves upwards under the action of pressure difference and compresses the elastic element 9, a blood sample or a sample enters the needle tube 1 through the needle 2, after the sample is collected enough, the push rod 5 is stopped to be pulled, the internal space of the needle tube 1 is not increased, the internal pressure is not increased, as the sample enters the needle tube 1, the pressures at two ends of the ball 8 are finally kept one, the elastic element 9 pushes the ball 8 and resets, the through hole 7 and the needle tube 1 are separated, the sample in the needle tube 1 cannot flow back to the through hole 7 and the needle 2, because the top of the through hole 7 is blocked by the ball 8, the sample in the through hole 7 and the needle 2 cannot flow back, so that the collected sample cannot return to the human body;

after collection, the push plate 4 is separated from the push rod 5, so that the push plate 4 is prevented from being separated from the needle tube 1 due to external force applied to the push rod 5 in the transfer process, a sample is not protected and flows out, then the needle tube 1 and an internal sample are rapidly inspected together, the sample is prevented from being injected into other containers, the sample is prevented from being influenced by external factors, errors exist between sample detection data and actual data, and medical workers are prevented from making correct judgment on patients;

when detecting, on 6 dress push pedal 4 back of block structure with push rod 5, through pressing down stationary blade 12 and removing ejector pin 13, ejector pin 13 with 8 jack-ups of ball to spill 7 tops of through-hole, 1 inside cavity of needle tubing communicates with the external world, promotes push rod 5 and drives push pedal 4 and remove, and 1 inner space of push pedal 4 compression needle tubing, thereby extrude 1 inside sample of needle tubing, and medical personnel detect the sample.

In the invention, the piston 3 is driven to move upwards by the push plate 4, so that the space in the needle tube 1 is increased, the top of the ball 8 is communicated with the needle tube 1 through the pressure difference between the upper side and the lower side of the ball 8, the through hole 7 is communicated with the needle tube 1, a sample enters the needle tube 1 under the action of the pressure difference, once the push plate 4 stops moving in the sampling process, the ball 8 can be quickly pushed to the top of the through hole 7 by the elastic element 9, the sample in the needle tube 1 cannot flow back to the human body, the influence of the backflow on the human body is avoided, and the problem that the existing arterial puncture needle cannot effectively play a backflow prevention effect is solved;

in the invention, before detection, the ball 8 is jacked up through the jacking rod 13, so that the inner cavity of the needle tube 1 is communicated with the outside, the piston 3 is extruded downwards, a small amount of samples are extruded, after the samples are enough, the jacking rod 13 is loosened, the ball 8 is reset by the elastic element 9, the samples are prevented from flowing out again, the needle tube 1 not only can be directly used as a container to send and detect the samples after sampling, the samples are prevented from being injected into other containers again, so that the samples are influenced by external factors, the errors of sample detection data and actual data are caused, the correct judgment of medical workers on patients is influenced, the detection accuracy is improved, the samples can be extruded for multiple times for detection, the problems that the samples need to be punctured for sampling again after single detection failure and the pain of the patients is increased are solved.

The clamping structure 6 comprises a group of clamping blocks 61 which are connected with the push rod 5 in a sliding mode, the inner sides of the clamping blocks 61 are fixedly connected with trigger springs 62, the trigger springs 62 are fixedly connected with a fixing plate 63 which is fixedly connected with the push rod 5, the push rod 5 is connected with a vertical rod 64 in a sliding mode, chamfers which are matched with each other are arranged at the bottom of the vertical rod 64 and the top of the inner side of the clamping block, a mounting groove 51 is formed in the push rod 5, a movable piece 65 is connected with the mounting groove 51 in a sliding mode, the movable piece 65 is fixedly connected with the vertical rod 64, and the clamping spring 66 is fixedly connected to the top of the movable piece 65 and the vertical rod 64; when the push rod 5 is connected with the push plate 4, the vertical rod 64 is pulled upwards, the clamping block 61 triggers the pulling force of the spring 62 to contract downwards into the push rod 5, after the clamping block 61 completely contracts into the push rod 5, the bottom of the push rod 5 is inserted into the push plate 4, then the vertical rod 64 is loosened, the clamping spring 66 presses the vertical rod 64 downwards through the movable sheet 65, the vertical rod 64 extends the clamping block 61 out of the push rod 5 through a chamfer, and the clamping block 61 extends into the push plate 4, so that the push plate 4 is connected with the push rod 5; the separation of the push rod 5 from the push plate 4 is completely opposite to the connection process and will not be described in detail here.

Wherein, the inner wall of the push plate 4 and the inner wall of the piston 3 are both provided with a clamping groove 14 with an annular structure, and the outer wall of the push plate 4 is provided with a clamping ring 15 with an annular structure; the clamping groove 14 on the inner wall of the piston 3 is matched with the clamping ring 15 on the outer wall of the push plate 4 to connect the piston 3 with the push plate 4, and the clamping groove 14 on the inner wall of the push plate 4 is matched with the clamping block 61 to facilitate the connection of the push plate 4 and the push rod 5.

Wherein, both sides of the clamping block 61 are provided with a limiting piece 16, the limiting piece 16 is connected with a limiting rod 17 in a sliding way, a straight slot 18 for limiting the clamping block 61 and a circular slot 19 are arranged in the push rod 5, and the straight slot 18 and the circular slot 19 are respectively used for accommodating the clamping block 61 and the vertical rod 64; the limiting piece 16 and the limiting rod 17 play a limiting role in limiting the clamping block 61, and the clamping block 61 is prevented from loosening and separating.

Wherein, the top of the vertical rod 64 passes through the push rod 5 and is fixedly connected with the push sheet 20; the push plate 20 facilitates pulling up the vertical rod 64.

The elastic element 9 comprises a connecting sheet 91 fixedly connected with the needle tube 1, the bottom of the connecting sheet 91 is fixedly connected with a lower pressure spring 92, and the bottom of the lower pressure spring 92 is fixedly connected with a fitting part 93 fitted with the ball 8; when the ball 8 moves upward by the pressure difference, the ball 8 compresses the push-down spring 92 through the engaging member 93, and after the pressure difference is eliminated, the push-down spring 92 returns the ball 8 through the engaging member 93.

Wherein, the annular groove 10 is internally and fixedly connected with a rubber ring 21 surrounding the fixed ring, the chute is externally sleeved with a protective ring 22, and the protective ring 22 is in threaded connection with the needle tube 1; the comfort level of fingers when medical personnel press stationary blade 12 is reduced to rubber ring 21, and when guard ring 22 rotated annular 10, can avoid annular 10 internals to receive the extrusion, lead to the sample to spill.

Wherein, the side wall of the needle tube 1 is provided with an observation port 23, and a transparent plate is arranged in the observation port 23; the user can check the sample condition in the needle tube 1 conveniently.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, 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 do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a prevent artery pjncture needle of blood adverse current, includes needle tubing 1 and syringe needle 2, its characterized in that: sliding connection has piston 3 in the needle tubing 1, be provided with push pedal 4 in the piston 3, 4 tops in the push pedal are provided with push rod 5, install the block structure 6 that is used for connecting push pedal 4 and push rod 5 in the push rod 5, through-hole 7 has been seted up to needle tubing 1 bottom, through-hole 7 bottom and syringe needle 2 intercommunication, top are provided with ball 8, be provided with elastic element 9 between ball 8 and the needle tubing 1, annular 10 has been seted up to the needle tubing 1 lateral wall, fixedly connected with reset spring 11 in the annular 10, the equal fixedly connected with stationary blade 12 of reset spring 11 tip, the inboard equal fixedly connected with ejector pin 13 of stationary blade 12, ejector pin 13 medial extremity all contacts with 8 bottoms of ball, through pressing stationary blade 12, makes stationary blade 12 drive ejector pin 13 draw close to the center and extrude ball 8 and make ball 8 by the jack-up to communicate with the external world with the inside cavity of needle tubing 1.

2. An arterial needle for preventing blood backflow according to claim 1, wherein: block structure 6 includes and has a set of joint piece 61 with 5 sliding connection of push rod, the equal fixedly connected with trigger spring 62 in joint piece 61 inboard, the common fixedly connected with of trigger spring 62 and 5 fixed connection's of push rod fixed plate 63, sliding connection has montant 64 in the push rod 5, montant 64 bottom all is provided with the chamfer of mutual matching with the fast inboard top of joint.

3. An arterial needle for preventing blood backflow as claimed in claim 2, wherein: set up mounting groove 51 in the push rod 5, sliding connection has the activity piece 65 in the mounting groove 51, activity piece 65 and montant 64 fixed connection, and top fixedly connected with block spring 66.

4. An arterial needle for preventing blood backflow as claimed in claim 3, wherein: the inner wall of the push plate 4 and the inner wall of the piston 3 are both provided with a clamping groove 14 with an annular structure, and the outer wall of the push plate 4 is provided with a clamping ring 15 with an annular structure.

5. An arterial needle for preventing blood backflow according to claim 4, wherein: joint piece 61 both sides all are provided with spacing piece 16, spacing piece 16 sliding connection has gag lever post 17, set up the straight mouthful groove 18 that is used for spacing joint piece 61 in the push rod 5 and vertically be provided with circular recess 19, straight mouthful groove 18 is used for holding joint piece 61 and montant 64 respectively with circular recess 19.

6. An arterial needle for preventing blood backflow according to claim 5, wherein: the top of the vertical rod 64 penetrates through the push rod 5 and is fixedly connected with the push sheet 20.

7. An arterial needle for preventing blood backflow according to claim 1, wherein: the elastic element 9 comprises a connecting piece 91 fixedly connected with the needle tube 1, the bottom of the connecting piece 91 is fixedly connected with a lower pressing spring 92, and the bottom of the lower pressing spring 92 is fixedly connected with a fitting part 93 fitted with the ball 8.

8. An arterial needle for preventing blood backflow according to claim 1, wherein: fixedly connected with encircles solid fixed ring's rubber ring 21 in annular 10, the ring groove overcoat is equipped with guard ring 22, guard ring 22 and needle tubing 1 threaded connection.

9. An arterial needle for preventing blood backflow according to claim 1, wherein: an observation port 23 is formed in the side wall of the needle tube 1, and a transparent plate is arranged in the observation port 23.