阅读说明：本技术 一种血透内瘘定点穿刺针 (Fixed-point puncture needle for hemodialysis internal fistula ) 是由 陆金婷 于 2019-11-27 设计创作，主要内容包括：一种血透内瘘定点穿刺针,包括针头、针头座和软管,所述的针头和软管通过针头座连接；软管末端连接有接头,接头上盖有接头盖,所述的针头座上设置有手柄；针头上安装有导向夹。所述的导向夹包括上夹板和下夹板,上夹板和下夹板的后端都设置有用于控制导向夹开合的夹耳,上夹板和下夹板的连接耳上安装有铰接轴,铰接轴上安装有用于提供夹持力的弹簧,上夹板的夹持面上设置有夹持位；下夹板的下部设置有向针头尾尖部方向倾斜的导向垫块,导向垫块的倾斜面与针头的尾尖部处于一个平面,且导向垫块的倾斜角度为30-45°。本穿刺针设置有导向夹,便于医护人员利用穿刺针定向穿刺,从而易实现定点穿刺。(A fixed-point puncture needle for hemodialysis internal fistula comprises a needle head, a needle head seat and a hose, wherein the needle head and the hose are connected through the needle head seat; the end of the hose is connected with a joint, a joint cover covers the joint, and a handle is arranged on the needle head seat; the needle head is provided with a guide clip. The guide clamp comprises an upper clamp plate and a lower clamp plate, clamping lugs for controlling the opening and closing of the guide clamp are arranged at the rear ends of the upper clamp plate and the lower clamp plate, hinged shafts are mounted on the connecting lugs of the upper clamp plate and the lower clamp plate, springs for providing clamping force are mounted on the hinged shafts, and clamping positions are arranged on the clamping surface of the upper clamp plate; the lower part of the lower clamping plate is provided with a guide cushion block which inclines towards the tail tip part of the needle head, the inclined plane of the guide cushion block and the tail tip part of the needle head are positioned on the same plane, and the inclined angle of the guide cushion block is 30-45 degrees. The puncture needle is provided with the guide clamp, so that medical personnel can conveniently use the puncture needle to puncture in a directional manner, and fixed-point puncture is easy to realize.)

1. A fixed-point puncture needle for hemodialysis internal fistula comprises a needle head (2), a needle head seat (4) and a hose (5), wherein the needle head (2) and the hose (5) are connected through the needle head seat (4); hose (5) end-to-end connection has joint (7), and joint (7) upper cover has joint cap (8), its characterized in that: a handle (3) is arranged on the needle head seat (4); the needle head (2) is provided with a guide clamp (1);

the guide clamp (1) comprises an upper clamp plate (9) and a lower clamp plate (14), clamp lugs (11) for controlling the guide clamp (1) to open and close are arranged at the rear ends of the upper clamp plate (9) and the lower clamp plate (14), articulated shafts (12) are arranged on the connecting lugs of the upper clamp plate (9) and the lower clamp plate (14), springs (13) for providing clamping force are arranged on the articulated shafts (12), and clamping positions (10) are arranged on the clamping surface of the upper clamp plate (9); the lower part of the lower splint (14) is provided with a guide cushion block (15) which inclines towards the tail tip part of the needle head (2), the inclined plane of the guide cushion block (15) and the tail tip part of the needle head (2) are positioned on the same plane, and the inclined angle of the guide cushion block (15) is 30-45 degrees.

2. The hemodialysis fistula fixed-point puncture needle according to claim 1, wherein: the flexible pipe (5) is provided with a flow clip (6).

3. The hemodialysis fistula fixed-point puncture needle according to claim 1, wherein: the clamping position (10) is an arc-shaped or square clamping position.

4. The hemodialysis fistula fixed-point puncture needle according to claim 1, wherein: the upper splint (9) at the tip of the needle (2) is narrower than the lower splint (14).

Technical Field

The invention relates to the technical field of medical instruments, in particular to a fixed-point puncture needle for hemodialysis internal fistula.

Background

Hemodialysis (Hemodialysis) Clinically, it means that some waste products in the blood are removed through a semi-permeable hemodialysis membrane. Hemodialysis is one of the safer, easy-to-use and widely-applied blood purification methods. Dialysis refers to the movement of solutes from a highly concentrated solution to a less concentrated solution through a semi-permeable membrane. Hemodialysis involves the movement of solutes and the movement of water, i.e., the exchange of substances between blood and dialysate in a dialyzer (artificial kidney) by means of semipermeable membrane contact and concentration gradients, causing metabolic wastes and excess electrolytes in the blood to move towards the dialysate, andcalcium ions, bases, and the like in the analyte solution move into the blood. If the mixed liquid of albumin and urea is put into a dialyzer and the outside of the dialyzer is soaked by water, the urea in the dialyzer tube can move to the water outside the dialyzer tube through the artificial kidney membrane pores, and albumin molecules are large and cannot pass through the membrane pores. The phenomenon of substance movement in which small molecular substances can pass through but large molecular substances cannot pass through a semipermeable membrane is called diffusion. The basic principle of hemodialysis is the method of clinically separating and purifying blood by diffusion phenomenon to achieve the purpose of purification.

In the prior art, during hemodialysis, the patient is subjected to two or three repeated punctures per week, two needles at a time. Puncture also requires a special puncture needle, and some are reported in the open literature,

1. chinese patent: anti-seepage internal fistula puncture needle for hemodialysis, application number: 201220394658.1, filing date: 2012.08.09, patentee: affiliated tenth national hospital of college university, address: 200072 Shanghai city Gate North zone extension Zhongway No. 301, inventor: zhao li min, abstract: the utility model relates to the field of medical equipment, especially relate to a blood is passed through and is used prevention of seepage internal fistula puncture syringe needle. The utility model provides a blood passes through with prevention of seepage internal fistula puncture syringe needle, includes the needle file, is located the syringe needle on the needle file and the PVC pipe that links to each other with the needle file, still includes the prevention of seepage line, the one end of prevention of seepage line with the syringe needle activity cup joints. The utility model discloses can play the effect that prevents oozing blood around the needle eye, its simple structure, the manufacturing method is convenient and practical, replaces unsafe cotton ball oppression method. In addition, due to the structure that the seepage-proofing line is fixed in the opposite direction, the anti-seepage needle has the function of pulling, can prevent the needle head from slipping, and greatly improves the safety during repeated puncture.

2. Chinese patent: a hemodialysis internal fistula puncture needle, application No.: 201620704024.X, application date: 2016.06.30, patentee: lishui city central hospital, address: 323000 Zhejiang Lishui city including xanthu 289, inventor: bang, abstract: the utility model discloses a hemodialysis internal fistula puncture needle, including the puncture needle body, puncture needle body plug bush is in the sleeve pipe, and the sheathed tube lower extreme is fixed in the upper end of pipe seat, and the lower part inner wall of pipe seat is fixed with the sealing plug, puncture needle body's lower extreme passes sealing plug and tip sealing plug and is fixed with the plug head, and the tip sealing plug is fixed in the bottom of pipe seat and blocks up the bottom of pipe seat, and the plug head presses the bottom surface of tip sealing plug, and the middle part lateral wall shaping of pipe seat has oblique connecting pipe, and oblique connecting pipe communicates with each other with the pipe seat, and the expert connects extension pipe on the oblique connecting pipe, and extension pipe's lower tip is connected with the screw joint, and the spiro union has the heparin cap on; after the puncture needle body and the cannula are inserted into a blood vessel of a human body, the puncture needle body is pulled out, which is very convenient.

3. Chinese patent: a hemodialysis needle, application No.: 201720112729.7, filing date: 2017.02.07, patentee: sinkeming, address: 266100 mountain road No. 84 of Licang region in Qingdao city, Shandong province, inventor: sinkeming, abstract: the utility model belongs to the technical field of medical instrument for hemodialysis, concretely relates to hemodialysis pjncture needle. The inner wall of the front end part of the inner tube is provided with an arc-shaped clamping groove which is connected with a needle seat of the steel needle; the needle seat of the steel needle is an inflation structure which is in interference connection with the clamping groove, one end of the inflation tube is communicated with the needle seat, and the other end of the inflation tube extends to the outside along the inflation tube opening at the tail end of the inner tube; the front end part of the outer pipe is fixedly connected with the rear end part of the inner pipe; the middle part of the outer tube is provided with a flow stopping clip, the tail part of the outer tube is provided with a dialysis tube connecting port, and the connecting port is movably and hermetically connected with a plug; the hemodialysis puncture needle also comprises a puncture needle fixing device. The utility model discloses a set up the mode that inner tube and outer tube were used even, realize through inflating the needle file that the steel syringe needle removes and fixes, have the stagnant flow and press from both sides and play the blocking effect, can both regard as the steel needle and also regard as keeping somewhere the needle use, have fixing device simultaneously, can avoid puncture the blood vessel by the pjncture needle in the back dialysis of puncturing, application scope is wide, convenient to use.

In the hemodialysis procedure of clinical application, the puncture is repeated twice to three times every week, which causes great damage to the skin and blood vessels of a patient, often the old injury is not healed, and a new puncture is needed. In order to reduce the damage to the skin and blood vessels of the patient, fixed-point puncture, i.e. puncture at the site of the first puncture, is recommended each time. Because different medical personnel have different operation methods, the original puncture is difficult to realize when the current puncture needle is used for puncture, and the expansion of the sore opening is very easy to cause.

Disclosure of Invention

The invention aims to provide a fixed-point puncture needle for hemodialysis internal fistula, which is provided with a guide clamp, so that medical personnel can directionally puncture by using the puncture needle conveniently, and fixed-point puncture is easy to realize.

The technical scheme adopted by the invention is as follows:

a fixed-point puncture needle for hemodialysis internal fistula comprises a needle head, a needle head seat and a hose, wherein the needle head and the hose are connected through the needle head seat; the end of the hose is connected with a joint, a joint cover covers the joint, and a handle is arranged on the needle head seat; the needle head is provided with a guide clip.

The guide clamp comprises an upper clamp plate and a lower clamp plate, clamping lugs for controlling the opening and closing of the guide clamp are arranged at the rear ends of the upper clamp plate and the lower clamp plate, hinged shafts are mounted on the connecting lugs of the upper clamp plate and the lower clamp plate, springs for providing clamping force are mounted on the hinged shafts, a clamping position is arranged on a clamping surface of the upper clamp plate, a needle head can be limited in the clamping position, and the needle head can move forwards and backwards and cannot move leftwards and rightwards; the lower part of the lower clamping plate is provided with a guide cushion block which inclines towards the tail tip part of the needle head, the inclined plane of the guide cushion block and the tail tip part of the needle head are positioned on the same plane, and the inclined angle of the guide cushion block is 30-45 degrees.

The flexible pipe is provided with a flow clip. The flow clamp can control the flow of the hose, and is convenient for the medical care personnel to operate.

The clamping position is an arc-shaped or square clamping position. The arrangement of the clamping position is convenient for the guide puncture of the needle head.

The upper splint at the tip of the needle is narrower than the lower splint. Set up like this when hemodialysis internal fistula fixed point puncture, the medical personnel of being convenient for observe the puncture condition of syringe needle.

The needle head with extremely thin wall can relieve pain and promote blood circulation. When the medical staff operates, the handle is held by hand, the guide cushion block is tightly attached to the skin of a patient, the tail tip part of the needle head is aligned to a part to be punctured, the needle head is pushed forwards, after the needle head punctures a blood vessel, the clamping lug is pinched, the guide clamp is opened, the guide clamp is separated from the needle head, then the puncture depth of the needle head is continuously adjusted, and when the needle head reaches a proper position, the medical adhesive plaster is attached and fixed; when the area is repeated the puncture, get new pjncture needle, repeat above-mentioned operation, can realize the hemodialysis internal fistula fixed point puncture, avoid because of medical personnel's operation proficiency, when the fixed point puncture, the angle of puncture changes, and causes the expansion of blood vessel sore mouth, influences the healing.

This hemodialysis internal fistula fixed point pjncture needle's advantage:

install the direction on this internal fistula fixed point pjncture needle is passed through to blood and press from both sides, the centre gripping position centre gripping that the direction pressed from both sides is on the syringe needle, and the lower plate that the direction pressed from both sides is provided with the direction cushion, and the vascular angle of syringe needle puncture can be fixed to the direction cushion, and when the fixed point puncture, the difficult vascular angle of puncture that changes can guarantee the fixed point puncture, causes the expansion of blood vessel sore mouth, influences the healing and causes the puncture oozing blood.

Drawings

FIG. 1 is a schematic structural view of a fixed point puncture needle for hemodialysis internal fistula of the invention;

FIG. 2 is a schematic view of the guide clamp of FIG. 1 with circular clamping locations;

FIG. 3 is a schematic view of the guide clamp of FIG. 1 with square clamp positions;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a right side view of FIG. 2;

FIG. 6 is a schematic view of the needle of FIG. 1 without the clip guide;

FIG. 7 is a top view of FIG. 6

The names of the sequence numbers in the figure are:

1. the needle comprises a guide clamp, 2, a needle head, 3, a handle, 4, a needle head seat, 5, a hose, 6, a flow clamp, 7, a joint, 8, a joint cover, 9, an upper clamping plate, 10, a clamping position, 11, a clamping lug, 12, a hinged shaft, 13, a spring, 14, a lower clamping plate, 15 and a guide cushion block.

Detailed Description

In order to describe the present invention in more detail, the following description is given with reference to the accompanying drawings.

As shown in the figure, the first and second,