CN110680973A - A kind of arteriovenous fistula puncture needle for blood purification - Google Patents

Abstract

The invention relates to an arteriovenous fistula puncture needle for blood purification, belongs to the technical field of blood purification equipment, and solves the problem that the metal needle easily damages blood vessels when the indwelling needle is moved or the blood collection angle of the indwelling needle is adjusted in the prior art. technical problem. The arteriovenous fistula puncture needle for blood purification includes a fluororesin cannula indwelling needle and a puncturing mechanism, wherein the fluororesin cannula indwelling needle includes an indwelling fluororesin cannula. During the patient's blood purification process, the indwelling fluororesin cannula is left in the patient's body. The puncturing mechanism is used for puncturing the patient's blood purification arteriovenous fistula, and the puncturing mechanism is lined with the fluororesin cannula indwelling needle, and the fluororesin cannula indwelling needle is inserted into the arteriovenous through the puncturing mechanism. There is only a fluororesin cannula indwelling in the blood vessel, and there is no metal needle indwelling. Because the indwelling fluororesin cannula is soft, during hemodialysis, the arm can be moved or the position and blood collection angle of the indwelling fluororesin cannula can be adjusted to obtain a larger blood collection volume.

Description

A kind of arteriovenous fistula puncture needle for blood purification

technical field

The invention relates to the technical field of blood purification equipment, in particular to an arteriovenous fistula puncture needle for blood purification.

Background technique

Since the first application of arteriovenous fistula in hemodialysis in 1962, arteriovenous fistula has been the most ideal permanent access for patients with end-stage renal failure. Arteriovenous fistula can provide the required blood flow for hemodialysis treatment. However, there are many reasons that affect the use time of arteriovenous fistula, and the most important reason is the damage to blood vessels caused by frequent puncture. Therefore, the puncture technique and the protection of the fistula vessels are crucial.

At this stage, most patients with blood purification use traditional dialysis fistula needles. However, traditional dialysis fistula needles all use metal needles. This metal needle has at least the following defects: (1) During the whole blood collection process, there are metal needles that remain on the patient's arms or legs and feet. It is easy to damage the blood vessels when moving; (2) After the traditional dialysis fistula needle is used for puncture, if the blood collection is not good, the metal needle cannot be adjusted, otherwise the inner wall of the blood vessel will be damaged, and the puncture can only be performed again; (3) The metal needle is not suitable for some Patients who are allergic to metals; (4) After the patient's blood purification is completed, the medical staff must immediately apply pressure to stop the bleeding when pulling the needle tip away from the blood vessel of the patient's arm. These pressured fingers will face huge needle sticks and blood infectious diseases (5) The outer diameter of the metal needle is relatively large, and the puncture trauma caused by it is relatively large.

SUMMARY OF THE INVENTION

One of the purposes of the present invention is to provide a puncture needle for blood purification for an arteriovenous fistula, which solves the technical problem that the metal needle easily damages the blood vessel when the indwelling needle is moved or the blood collection angle of the indwelling needle is adjusted in the prior art. The technical effects that can be produced by the preferred technical solutions of the present invention are described in detail below.

For achieving the above object, the invention provides the following technical solutions:

The arteriovenous fistula puncture needle for blood purification of the present invention includes a fluororesin cannula indwelling needle and a puncturing mechanism, wherein the fluororesin cannula indwelling needle comprises an indwelling fluororesin cannula, and during the patient's blood purification process, the indwelling fluororesin sleeve is placed The tube is left in the patient. The puncturing mechanism is used for puncturing the patient's blood purification arteriovenous fistula, and the puncturing mechanism is lined with the fluororesin cannula indwelling needle, so as to puncture the arteriovenous through the puncturing mechanism and make the fluororesin cannula indwelling needle enter the arteriovenous.

As a preferred technical solution, the indwelling fluororesin sleeve has a conical structure, and a plurality of front-end through holes of the indwelling fluororesin sleeve are opened at the front end of the indwelling fluororesin sleeve.

As a preferred technical solution, the indwelling fluororesin sleeve has a cone structure of 3° to 7°. Preferably, the indwelling fluororesin sleeve has a 5° conical structure.

As a preferred technical solution, the fluororesin cannula indwelling needle further comprises an indwelling fluororesin cannula fixing base, a blood connection pipeline, and a blood connection pipeline fixing structure, wherein the indwelling fluororesin cannula is a hollow tubular structure, and the indwelling fluororesin cannula is indwelling One end of the fluororesin cannula is used to enter the arteries and veins and communicate with the patient's arteries and veins, and the other end is fixed on the indwelling fluororesin cannula fixing base; the other end of the indwelling fluororesin cannula fixing base is sequentially connected with the blood pipeline and blood The connection pipeline fixing structure is in communication, and the port of the blood connection pipeline fixing structure is provided with a threaded interface.

As a preferred technical solution, the fluororesin cannula indwelling needle further includes a hemostatic clip, and the hemostatic clip is located on the blood connection pipeline for clamping and blocking the blood connection pipeline.

As a preferred technical solution, the hemostatic clip includes a body, a clip slot, a clip tip, a lower tip structure and an upper tip structure, wherein the clip slot and clip tip are located at two ends of the body respectively, and the clip slot and clip tip Matching, so that the snap tip can be snapped into the slot. The lower tip structure and the upper tip structure are located between the card slot and the snap tip, the lower tip structure and the upper tip structure are located on the same side of the body, and when the snap tip is inserted into the slot, the lower tip structure and the upper tip structure are close to each other and/or press fit.

As a preferred technical solution, the fluororesin cannula indwelling needle also includes a sealing cap for the blood connection pipeline, and the sealing cap for the blood connection pipeline includes a sealing cap sealing structure and a sealing cap thread handle, and the sealing cap sealing structure and the sealing cap thread handle are fixed For connection, the sealing cap sealing structure is a fixed column, and the diameter of the fixed column matches the inner diameter of the blood connection pipeline fixing structure, so as to seal the fluororesin cannula indwelling needle by inserting the fixing column into the blood connection pipeline fixing structure.

As a preferred technical solution, the puncture mechanism includes a metal-guided puncture core, a metal-guided puncture core fixing base and a metal-guided puncture core threaded handle, wherein the metal-guided puncture core is used for puncturing a patient's blood purification arteriovenous fistula One end of the metal guide puncture needle core is fixed on the metal guide puncture needle core fixing base, and the metal guide puncture needle core fixing base is also fixed with a metal guide puncture needle core thread handle.

As a preferred technical solution, the arteriovenous fistula puncture needle for blood purification also includes a cannula indwelling needle protective sleeve, which is used to be sleeved on the indwelling fluororesin cannula of the fluororesin cannula indwelling needle, To isolate the indwelling fluororesin sleeve from the outside air.

As a preferred technical solution, the arteriovenous fistula puncture needle for blood purification also includes a cannula indwelling needle protective sleeve sealing cap, the cannula indwelling needle protective sleeve sealing cap matches the cannula indwelling needle protective sleeve, and the cannula indwelling needle protects The sleeve sealing cap is snap-connected with the cannula indwelling needle protective sleeve and seals the cannula indwelling needle protective sleeve.

The arteriovenous fistula puncture needle for blood purification provided by the present invention has at least the following beneficial technical effects:

In the blood purification arteriovenous fistula puncture cannula indwelling needle of the present invention, during the blood purification puncture process for the patient, the puncture mechanism is lined on the fluororesin cannula indwelling needle, and the puncture mechanism and the indwelling fluororesin cannula enter the patient together arteriovenous, and then pull out the puncture mechanism, so that the indwelling fluororesin cannula is indwelled in the human body. There is no metal needle indwelling in the blood vessel, only the indwelling fluororesin cannula is indwelled, and the indwelling fluororesin cannula is relatively soft, and the patient can move the arm freely during the hemodialysis process, which minimizes the risk of damage to the blood vessel. When the patient's vascular condition is not good or the blood collection condition during hemodialysis is not good, the angle and position of the indwelling fluororesin cannula can be adjusted to obtain a better blood collection volume, and there is no need to worry about causing damage to the inner wall of the blood vessel during adjustment, which is similar to traditional dialysis. Using a puncture needle is fundamentally different.

On the other hand, during the blood purification process, only the indwelling fluororesin cannula is indwelled in the patient's body. When the indwelling fluororesin cannula is withdrawn from the patient's arm after the blood purification is completed, the kidney nurses will not be stabbed by the sharp needle core, avoiding accidental puncture. Unexpected needle stick infection, more active to ensure the health of medical staff.

In addition, the preferred technical solution of the present invention can also produce the following technical effects:

In the preferred technical solution of the present invention, the indwelling fluororesin cannula is configured as a cone structure, and the front end of the indwelling fluororesin cannula is provided with a plurality of cannula front-end through holes, which can effectively obtain a better blood collection volume.

The arteriovenous fistula puncture needle for blood purification in the preferred technical solution of the present invention is provided with a blood connection pipeline hemostatic clip and an indwelling needle protective sleeve sealing cap, so that there is no need for a hemostatic forceps to clamp the trocar before the blood pipeline is connected during the puncture process. The rubber outer tube simplifies the puncture of the arteriovenous fistula.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the structural representation of a preferred embodiment of the present invention, a blood purification dynamic and static fistula puncture cannula indwelling needle;

2 is a schematic structural diagram of a fluororesin cannula indwelling needle according to a preferred embodiment of the present invention;

3 is a schematic structural diagram of a fluororesin cannula indwelling needle needle according to a preferred embodiment of the present invention;

4 is a schematic structural diagram of a preferred embodiment of the present invention, a fluororesin cannula indwelling needle seamless package;

5 is a schematic structural diagram of the sealing cap of the blood connection pipeline according to a preferred embodiment of the present invention;

6 is a schematic structural diagram of a protective sleeve and a sealing cap of a cannula indwelling needle according to a preferred embodiment of the present invention;

7 is a schematic structural diagram of a hemostatic clip for a blood connection pipeline according to a preferred embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a puncture mechanism according to a preferred embodiment of the present invention.

In the figure: 1- cannula indwelling needle protective sleeve; 2- fluororesin cannula indwelling needle; 3- hemostatic clip; 4- blood connection pipeline sealing cap; 5- puncture mechanism; 6- cannula indwelling needle protective sleeve sealing cap ;7-Indwelling fluororesin cannula; 71-Through hole at the front end of the cannula; 8-Indwelling fluororesin cannula fixing base; 9-Blood connection pipeline; 10-Blood connection pipeline fixing structure; 11-Threaded interface; 12- Metal-guided puncture needle core; 13-metal guide puncture needle core fixing base; 14-metal guide puncture needle core thread handle; 15-sealing cap sealing structure; 16-seal cap thread handle; 17-cannula indwelling needle protective sleeve front end structure ; 18- the middle end structure of the cannula indwelling needle protective sleeve; 19- the rear end structure of the cannula indwelling needle protective sleeve; 20- the cannula indwelling needle protective sleeve bayonet; 21- cannula indwelling needle protective sleeve sealing cap bayonet; 22 - cannula indwelling needle protective sleeve sealing cap handle; 23- clip groove; 24- snap tip; 25- lower tip structure; 26- upper tip structure; 27- anti-slip thread.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to FIG. 1 , a puncture needle for an arteriovenous fistula for blood purification includes a fluororesin cannula indwelling needle 2 and a puncture mechanism 5 . The fluororesin cannula indwelling needle 2 includes an indwelling fluororesin cannula 7, which is indwelled in the patient's body during the patient's blood purification process. The puncture mechanism 5 is used for puncturing the patient's blood purification arteriovenous fistula, and the puncture mechanism 5 is lined on the fluororesin cannula indwelling needle 2, so as to puncture the arteriovenous through the puncture mechanism 5 and make the fluororesin cannula indwelling needle 2 enter the arteriovenous .

It should be noted that the metal core of the existing arteriovenous fistula puncture needle is relatively long. When the renal medical staff pulls out the metal core during the puncture process, the sharp needle tip is very likely to cause accidental injury and infection of medical staff and patients. . When the arteriovenous fistula puncture needle for blood purification in the above preferred embodiment is used, only the fluororesin cannula 7 is placed in the human body, because the fluororesin cannula is relatively soft, which can not only avoid damage to blood vessels, but also meet the The normal movement of the human body and adjustment of the blood sampling angle and position of the indwelling fluororesin cannula 7 can obtain a larger blood sampling volume.

On the other hand, since there is no metal needle indwelling in the human body, the above-mentioned arteriovenous fistula puncture needle for blood purification is especially suitable for patients with metal allergies, and the renal nursing staff will indwell the fluororesin cannula 7 after the blood purification is completed. When the patient's arm is withdrawn, the sharp needle core will not be punctured, thereby avoiding unexpected needle stick infection, and can more actively ensure the health of medical staff.

3 , the indwelling fluororesin sleeve 7 has a conical structure, and a plurality of sleeve front end through holes 71 are opened at the front end of the indwelling fluororesin sleeve 7 . Preferably, the front end of the indwelling fluororesin sleeve 7 is provided with four small circular holes, that is, four through holes 71 at the front end of the sleeve. Further preferably, the through holes 71 at the front end of the cannula are opened at different positions at the front end of the indwelling fluororesin cannula 7, so as to realize blood collection at different positions.

Preferably, the indwelling fluororesin sleeve 7 has a conical structure, that is, the diameter of the indwelling fluororesin sleeve 7 gradually increases or/or decreases along the length direction. Preferably, the pipe diameter of the front end of the indwelling fluororesin sleeve 7 is smaller than the pipe diameter away from the front end of the indwelling fluororesin sleeve 7 . It should be noted that the distal end of the indwelling fluororesin cannula 7 refers to the end of the indwelling fluororesin cannula 7 which is inserted into the blood vessel of the human body.

In the above preferred embodiment, a plurality of cannula front end through holes 71 are opened at the front end of the indwelling fluororesin cannula 7, that is, a plurality of through holes 71 are opened on the side wall of one end of the indwelling fluororesin cannula 7 embedded in the human blood vessel. It can effectively increase the blood collection channel at the front end of the indwelling fluororesin cannula 7, that is, blood can not only enter or flow out of the indwelling fluororesin cannula 7 from the end tube hole of the indwelling fluororesin cannula 7, but also from the indwelling fluororesin cannula 7. The through hole on the side wall of the front end enters and/or flows out of the indwelling fluororesin cannula 7, thereby obtaining a larger blood collection volume. On the other hand, by providing the cannula front end through hole 71 on the front end side wall of the indwelling fluororesin cannula 7, the blood sampling position of the indwelling fluororesin cannula 7 is increased, and the indwelling fluororesin cannula 7 can be simultaneously performed from multiple positions. Blood collection, thereby reducing the effect of vascular conditions on blood collection volume.

Preferably, the cannula lengths of the indwelling fluororesin cannula 7 are 3 specifications, 25mm, 30mm, and 35mm, respectively, so as to facilitate the use of different arteriovenous depths for different patients. Further preferably, the diameter of the cannula has three specifications, which are 1.6 mm, 1.7 mm, and 1.8 mm, respectively, so as to facilitate the needs of patients for different blood collection volumes.

It should be further noted that, in the above preferred embodiment, by setting a plurality of through holes at the front end of the indwelling fluororesin cannula 7, under the condition of the same level of blood collection volume, the puncture needle core is smaller, and the trauma to the patient is smaller, Hemostasis is easier after blood pressure dialysis.

As a preferred embodiment of the present invention, the indwelling fluororesin sleeve 7 has a conical structure of 3° to 7°. Preferably, the indwelling fluororesin sleeve 7 is a 5° conical structure. It should be noted that the 5° cone structure means that the angle of the half cone angle in the cone structure is 5°, that is, the half cone angle of the cone structure is 5°.

2 , as a preferred embodiment, the fluororesin cannula indwelling needle 2 further includes an indwelling fluororesin cannula fixing base 8 , a blood connection line 9 , and a blood connection line fixing structure 10 , wherein the indwelling fluororesin cannula is 7 is a hollow tubular structure, and one end of the indwelling fluororesin cannula 7 is used to enter the arteriovenous and communicate with the patient's arteriovenous, and the other end is fixed on the indwelling fluororesin cannula fixing base 8 . Preferably, the other end of the indwelling fluororesin sleeve fixing base 8 is sequentially communicated with the blood connection pipeline 9 and the blood connection pipeline fixing structure 10 , and the port of the blood connection pipeline fixing structure 10 has a threaded interface 11 .

4, as a preferred embodiment, the indwelling fluororesin sleeve 7 and the indwelling fluororesin sleeve fixing base 8 are matched with each other, so that the indwelling fluororesin sleeve 7 and the indwelling fluororesin sleeve fixing base 8 can be seamlessly packaged . Specifically, the indwelling fluororesin sleeve fixing base 8 is set as a tapered hole, and the end of the indwelling fluororesin sleeve 7 connected to the indwelling fluororesin sleeve fixing base 8 is set to a matching tapered structure, so that the indwelling fluororesin sleeve 7 is connected to the conical structure. The sleeve 7 passes through the tapered hole on the indwelling fluororesin sleeve fixing base 8 and is sleeved with the indwelling fluororesin sleeve fixing base 8 .

As another preferred embodiment, the indwelling fluororesin sleeve 7 and the indwelling fluororesin sleeve fixing base 8 may also have an integral structure.

In the above preferred embodiment, the indwelling fluororesin cannula 7 and the indwelling fluororesin cannula fixing base 8 are integrally packaged by seamless molding, which can prevent blood coagulation, ensure smooth blood collection and obtain sufficient blood flow.

Referring to FIG. 1 , the fluororesin cannula indwelling needle 2 further includes a hemostatic clip 3 , and the hemostatic clip 3 is located on the blood connection pipeline 9 for clamping and blocking the blood connection pipeline 9 . Preferably, the hemostatic clip 3 is configured as an elastic snap mechanism.

7 , the hemostatic clip 3 includes a body, a snap slot 23 and a snap tip 24, wherein the snap slot 23 and snap tip 24 are located at two ends of the body, respectively, and the snap slot 23 and snap tip 24 match, so that the snap The buckle tip 24 can be inserted into the slot 23 .

Preferably, the hemostatic clip 3 further includes a lower tip structure 25 and an upper tip structure 26, the lower tip structure 25 and the upper tip structure 26 are located between the snap groove 23 and the snap tip 24, and the lower tip structure 25 and the upper tip structure 26 are located in the body When the snap tip 24 is snapped into the snap slot 23, the lower tip structure 25 and the upper tip structure 26 are close to each other and/or press together.

Preferably, the hemostatic clip 3 is made of medical plastics, such as polyvinyl chloride, polycarbonate, polyethylene, polypropylene, polytetrafluoroethylene, and the like.

Referring to FIG. 7 , the hemostatic clip 3 further includes an anti-slip thread 27 , the anti-slip thread 27 is located on the side of the body away from the lower tip structure 25 and the upper tip structure 26 . When the main body closes the clamping groove 23 and the clamping tip 24, the anti-slip thread 27 can effectively prevent the fingers and/or the palm from slipping relative to the surface of the main body, thereby facilitating the medical staff to press and close the hemostatic clip 3, so as to seal the blood connection tube in time. The purpose of road 9 to prevent blood leakage.

Preferably, the hemostatic clip 3 is provided with a through hole, and the blood connection pipeline 9 is connected to the hemostatic clip 3 through the through hole, so that the hemostatic clip 3 can be nested on the blood connection pipeline 9, thereby effectively simplifying the hemostatic clip 3. The operation of holding the blood connection line 9.

Further, the hemostatic clip 3 is provided with two through holes for connecting with the blood connection pipeline 9, and one through hole is arranged between the lower tip structure 25 and the upper tip structure 26, and the other through hole is arranged at the upper tip structure 26. Between the clamping groove 23, or another through hole is provided between the lower tip structure 25 and the snap tip 24, so that the lower tip structure 25 and the upper tip structure 26 can clamp the blood connection pipeline 9 after being pressed together, In order to achieve the purpose of sealing the blood connection pipeline 9 .

It should be noted that, in the prior art, before the puncture needle for the arteriovenous fistula is connected to the blood pipeline during the puncture process, the rubber outer tube needs to be clamped with a hemostatic forceps to avoid blood extravasation of the patient. Although the rubber outer tube is clamped with hemostatic forceps, the purpose of blocking the rubber outer tube and preventing blood leakage can be achieved. However, when the rubber outer tube is clamped with hemostatic forceps, medical personnel need to take the hemostatic forceps, and then clamp the hemostasis. , the operation is cumbersome, which is not conducive to fast clamping and hemostasis. The arrangement of the hemostatic clip 3 in the above preferred embodiment simplifies the operation of clamping the closed blood connection pipeline 9 to pressing, and can quickly and effectively clamp the closed blood connection pipeline 9 .

1 and 5 , the fluororesin cannula indwelling needle 2 further includes a sealing cap 4 for the blood connection line. Preferably, the sealing cap 4 of the blood connection pipeline includes a sealing cap sealing structure 15 and a sealing cap threaded handle 16, and the sealing cap sealing structure 15 and the sealing cap threaded handle 16 are fixedly connected.

In the above preferred embodiment, the blood connection pipeline 9 carries the hemostatic clip 3. When the prefilled external pipeline is not connected after the puncture, the pipeline can be clamped by the hemostatic clip 3 to avoid blood extravasation. When other examinations or treatments are required during the patient's blood purification, the blood connection line 9 can also be clamped by the hemostatic clip 3 and/or the sealing cap 4 of the blood connection line can be tightened to temporarily release the patient from blood purification without affecting the The patient continued blood purification.

Further, the blood connection pipeline fixing structure 10 is provided with a threaded interface 11, and the blood connection pipeline fixing structure 10 interface is sealed by the blood connection pipeline sealing cap 4, so that the blood connection pipeline fixing structure 10 is not connected outside. When piping, protect the interface from external infection.

As a preferred embodiment of the present invention, the sealing cap sealing structure 15 is a fixing column, and the diameter of the fixing column is matched with the inner diameter of the fixing structure 10 of the blood connection pipeline, so that the fixing column is inserted into the blood connection pipeline for fixing The structure 10 seals the fluororesin cannula indwelling needle 2 .

In the above preferred embodiment, the blood connection pipeline sealing cap 4 can be used to seal the blood connection pipeline 9 . Specifically, the sealing cap sealing structure 15 is embedded in the interface of the blood connection pipeline fixing structure 10 to achieve the purpose of sealing the blood connection pipeline 9 . , so as to avoid the blood overflowing along the blood connection pipeline 9 during the puncture process.

As a preferred embodiment of the present invention, a hemostatic component is provided in the sealing cap 4 of the blood connection pipeline. Preferably, the hemostatic component is made of elastic material, so that the metal-guided puncture needle core 12 in the puncture mechanism 5 can pass through, but the central needle hole will be filled with elastic material immediately after passing through to avoid bleeding during hemodialysis. Preferably, the hemostatic component can be made of natural rubber, polyurethane, silicone rubber and the like.

As a preferred embodiment, the sealing cap sealing structure 15 is provided with an outer thread, and the blood connection pipeline fixing structure 10 is provided with an inner thread matching the outer thread on the sealing cap sealing structure 15, so that the sealing cap sealing structure 15 It can be connected with the fixing structure 10 of the blood connection pipeline through threads.

1 and 8 , the puncture mechanism 5 includes a metal guide puncture needle core 12 , a metal guide puncture needle core fixing base 13 and a metal guide puncture needle core thread handle 14 . Preferably, the metal-guided puncture needle core 12 is used for arteriovenous puncture for blood purification of a patient, and one end of the metal-guided puncture needle core 12 is fixed on the metal-guided puncture needle core fixing base 13 . Further preferably, the metal guiding puncture needle core screw handle 14 is also fixed on the metal guiding puncture needle core fixing base 13 .

As a preferred embodiment of the present invention, the metal guide puncture needle core 12 is tightly lined in the indwelling fluororesin sleeve 7, so that during the blood purification puncture process for the patient, the metal guide puncture needle core 12 and the indwelling fluororesin sleeve After the tube 7 enters the patient's arteriovenous together, the metal guiding puncture needle core 12 is removed and only the indwelling fluororesin cannula 7 is left in the patient's body, and then connected to the patient through the blood connection pipeline 9 and the blood connection pipeline fixing structure 10. Infusion circuit, and then achieve the purpose of blood purification dialysis.

Preferably, the metal guide puncture needle core 12 includes at least two specifications, one is a blunt metal guide puncture needle, and the other is a sharp metal guide puncture needle. In arteriovenous fistula puncture, buttonhole puncture has the advantages of less bleeding in patients, high puncture success rate, solving difficult internal fistula puncture, reducing the incidence of complications of aneurysm disease, and prolonging the service life of internal fistula.

The metal-guided puncture needle in the above preferred embodiment is very suitable for puncture of an arteriovenous fistula. First, a sharp-type metal-guided puncture is used to puncture the patient before the buttonhole is formed, that is, the subcutaneous tunnel area is created. The metal-guided puncture needle is used for puncture after the buttonhole is formed, so as to meet the requirements of the renal medical staff for the puncture of the patient's arteriovenous fistula.

1 and 6, the arteriovenous fistula puncture needle for blood purification also includes a cannula indwelling needle protective sleeve 1, and the cannula indwelling needle protective sleeve 1 is used to cover the indwelling fluororesin sleeve of the fluororesin cannula indwelling needle 2. on the tube 7 to isolate the indwelling fluororesin sleeve 7 from the outside air.

1 and 6, the arteriovenous fistula puncture needle for blood purification also includes a cannula indwelling needle protective sleeve sealing cap 6, and the cannula indwelling needle protective sleeve sealing cap 6 matches the cannula indwelling needle protective sleeve 1, and the cannula indwelling needle protective sleeve 1 is matched. The needle protective sleeve sealing cap 6 is snap-connected with the cannula indwelling needle protective sleeve 1 and seals the cannula indwelling needle protective sleeve 1 .

Specifically, during the patient's vascular puncture process, the cannula indwelling needle protective cover 1 and the cannula indwelling needle protective cover sealing cap 6 are disassembled, and the arteriovenous fistula puncture cannula indwelling needle for blood purification is taken out for vascular puncture.

It should be noted that the arteriovenous fistula puncture cannula indwelling needle for blood purification includes a puncture mechanism 5 and a fluororesin cannula indwelling needle 2 , and the puncture mechanism 5 is lined with the fluororesin cannula indwelling needle 2 . Then, the puncture mechanism 5 is pulled out, and then the rubber outer tube in the fluororesin cannula indwelling needle 2 is clamped with the hemostatic clip 3 on the blood connection line 9 . Finally, pull out the sealing cap 4 of the blood connection pipeline and connect the blood pipeline.

6 , in a preferred embodiment, the cannula indwelling needle protective sleeve sealing cap 6 includes a cannula indwelling needle protective sleeve sealing cap bayonet 21 and a cannula indwelling needle protective sleeve sealing cap handle 22 .

Referring to FIG. 6, a preferred embodiment, the cannula indwelling needle protective sleeve 1 includes a cannula indwelling needle protective sleeve front end structure 17, cannula indwelling needle protective sleeve middle end structure 18, cannula indwelling needle protective sleeve rear end structure 19 , cannula indwelling needle protective sleeve bayonet 20.

Preferably, the cannula indwelling needle protective sleeve sealing cap bayonet 21 is matched with the cannula indwelling needle protective sleeve bayonet 20, so that the cannula indwelling needle protective sleeve sealing cap bayonet 21 and cannula indwelling needle protective sleeve bayonet 20 can be Seal the connection. Specifically, the fluororesin cannula indwelling needle 2 and the puncturing mechanism 5 are encapsulated in the cannula indwelling needle protective sleeve 1 through the cannula indwelling needle protective sleeve sealing cap 6 .

The setting of the cannula indwelling needle protective sleeve 1 and the cannula indwelling needle protective sleeve sealing cap 6 not only seals the fluororesin cannula indwelling needle 2 and the puncture mechanism 5 before the blood purification arteriovenous fistula puncture needle is used for trial use, but Prevent the arteriovenous fistula puncture needle for blood purification from being contaminated before use, and the cannula indwelling needle protective cover 1 and cannula indwelling needle protective cover sealing cap 6 can also be used for blood purification after the arteriovenous fistula puncture needle is used. The metal-guided puncture needle core 12 is placed to avoid accidental injury to patients and medical staff, and at the same time, it can prevent the exposed metal needle core from causing great pollution to the environment and making it difficult for special treatment of medical waste.

The steps of using an arteriovenous fistula puncture needle for blood purification according to a preferred embodiment of the present invention are as follows:

S1. Disassemble the cannula indwelling needle protective cover 1 and the cannula indwelling needle protective cover sealing cap 6, and take out the blood purification arteriovenous fistula puncture cannula indwelling needle.

S2. First, the blood purification arteriovenous fistula puncture cannula indwelling needle is used for blood vessel puncture, and the metal guiding puncture needle core 12 is pulled out.

S3. Use the hemostatic clip 3 to clamp the blood connection line 9 in the fluororesin cannula indwelling needle 2, and pull out the blood connection line sealing cap 4.

S4, connecting the external blood vessel.

S5, fix the fluororesin cannula indwelling needle 2 by medical tape.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. An arteriovenous internal fistula puncture needle for blood purification is characterized by comprising a fluororesin sleeve indwelling needle (2) and a puncture mechanism (5), wherein,

the fluororesin sleeve indwelling needle (2) comprises an indwelling fluororesin sleeve (7), and the indwelling fluororesin sleeve (7) is indwelling in the body of the patient during the blood purification process of the patient;

the puncture mechanism (5) is used for puncture of the arteriovenous internal fistula for blood purification of a patient, and the puncture mechanism (5) is lined on the fluororesin sleeve indwelling needle (2) so as to puncture the arteriovenous through the puncture mechanism (5) and make the fluororesin sleeve indwelling needle (2) enter the arteriovenous.

2. The arteriovenous internal fistula puncture needle for blood purification according to claim 1, wherein the indwelling fluororesin sleeve (7) has a conical structure, and a plurality of sleeve leading end through holes (71) are opened at the leading end of the indwelling fluororesin sleeve (7).

3. The arteriovenous internal fistula puncture needle for blood purification according to claim 2, wherein the indwelling fluororesin sleeve (7) has a 3 ° to 7 ° cone structure.

4. The arteriovenous internal fistula puncture needle for blood purification according to any one of claims 1 to 3, wherein the fluororesin sleeve indwelling needle (2) further comprises an indwelling fluororesin sleeve fixing base (8), a blood connecting line (9), a blood connecting line fixing structure (10), wherein,

the indwelling fluororesin sleeve (7) is of a hollow tubular structure, one end of the indwelling fluororesin sleeve (7) is used for entering arteriovenous and communicating with arteriovenous of a patient, and the other end is fixed on the indwelling fluororesin sleeve fixing base (8);

keep somewhere the other end of fluororesin sleeve pipe unable adjustment base (8) in proper order with blood connecting line (9) with blood connecting line fixed knot constructs (10) intercommunication, and there is hickey (11) in the port department of blood connecting line fixed knot constructs (10).

5. The arteriovenous internal fistula puncture needle for blood purification according to claim 4, wherein the fluororesin cannula indwelling needle (2) further comprises a hemostatic clip (3), and the hemostatic clip (3) is provided on the blood connecting line (9) for holding and blocking the blood connecting line (9).

6. The arteriovenous internal fistula puncture needle for blood purification according to claim 5, wherein the hemostatic clip (3) comprises a body, a notch (23), a snap tip (24), a lower tip structure (25) and an upper tip structure (26), wherein,

the clamping groove (23) and the buckle tip (24) are respectively positioned at two ends of the body, and the clamping groove (23) is matched with the buckle tip (24) so that the buckle tip (24) can be clamped in the clamping groove (23);

the lower tip structure (25) and the upper tip structure (26) are located between the clamping groove (23) and the clamping tip (24), the lower tip structure (25) and the upper tip structure (26) are located on the same side of the body, and when the clamping tip (24) is clamped in the clamping groove (23), the lower tip structure (25) and the upper tip structure (26) are close to each other and/or pressed.

7. The arteriovenous internal fistula puncture needle for blood purification according to claim 4, wherein the fluororesin cannula indwelling needle (2) further comprises a blood connection line sealing cap (4), the blood connection line sealing cap (4) comprises a sealing cap sealing structure (15) and a sealing cap threaded handle (16),

the sealing structure (15) of the sealing cap is fixedly connected with the threaded handle (16) of the sealing cap,

the sealing cap sealing structure (15) is a fixing column, the diameter of the fixing column is matched with the inner diameter of the blood connecting pipeline fixing structure (10), and the fluororesin cannula indwelling needle (2) is sealed by inserting the fixing column into the blood connecting pipeline fixing structure (10).

8. The arteriovenous internal fistula puncture needle for blood purification according to claim 1, wherein the puncture mechanism (5) comprises a metal-guided puncture needle core (12), a metal-guided puncture needle core fixing base (13), and a metal-guided puncture needle core screw handle (14), wherein,

the metal guide puncture needle core (12) is used for the puncture of arteriovenous internal fistula for purifying blood of a patient, one end of the metal guide puncture needle core (12) is fixed on the metal guide puncture needle core fixing base (13),

the metal guide puncture needle core thread handle (14) is also fixed on the metal guide puncture needle core fixing base (13).

9. The arteriovenous internal fistula puncture needle for blood purification according to claim 1, further comprising a cannula-indwelling needle protective sheath (1), the cannula-indwelling needle protective sheath (1) being adapted to be fitted over an indwelling fluororesin cannula (7) of the fluororesin cannula-indwelling needle (2) to isolate the indwelling fluororesin cannula (7) from the outside air.

10. The arteriovenous internal fistula puncture needle for blood purification according to claim 9, further comprising a cannula indwelling needle protective sheath sealing cap (6), wherein the cannula indwelling needle protective sheath sealing cap (6) is matched with the cannula indwelling needle protective sheath (1), and the cannula indwelling needle protective sheath sealing cap (6) is in snap-fit connection with the cannula indwelling needle protective sheath (1) and seals the cannula indwelling needle protective sheath (1).

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