Pincer occlusion arteriovenous fistula formation device

Abstract

The application provides a clamp type arteriovenous fistula forming device, which comprises a first handle and a second handle which are hingedly connected to each other, one end of the first handle near the hinge joint is connected with a first ablation tube, one end of the second handle near the hinge joint is connected with a second ablation tube, the free end of the first ablation tube is provided with a first ablation head, the free end of the second ablation tube is provided with a second ablation head, and the first ablation head and the second ablation head are connected with a power supply through respective electrode wires. The hingedly connected first handle and second handle form a fulcrum through the hinge joint, and the ablation heads can be accurately positioned based on the fulcrum, and the phenomenon of ablation mispositioning does not occur; the whole structure is simple and easy to operate, percutaneous puncture can be realized to form an arteriovenous fistula, and the surgical incision can be effectively reduced, and the surgical risk can be reduced.

Description

TECHNICAL FIELD

[0001] The present application designs a kind of clamp type occlusion arteriovenous fistula formation device. BACKGROUND

[0002] Traditional arteriovenous fistuloplasty is to cut open the skin tissue of hand, strip blood vessel, and artificially establish a short circuit between artery and vein using vascular surgery technology, to provide long-term and effective blood vessel access for hemodialysis.

[0003] However, this traditional arteriovenous fistuloplasty also has many postoperative complications, large surgical wound, long operation time, thereby increasing the risk of surgery. SUMMARY

[0004] In order to solve at least one technical problem existing in the prior art, the present application provides a clamp type occlusion arteriovenous fistula formation device, which is simple in structure, easy to operate, can realize arteriovenous fistuloplasty through skin puncture, and can effectively reduce surgical wound and reduce surgical risk.

[0005] The present application provides a clamp type occlusion arteriovenous fistula formation device, comprising a first handle and a second handle which are hingedly connected, a first ablation tube is connected to the end of the first handle, a second ablation tube is connected to the end of the second handle, a first ablation head is arranged at the free end of the first ablation tube, a second ablation head is arranged at the free end of the second ablation tube, and the first ablation head and the second ablation head are respectively connected to the power supply through respective electrode wires.

[0006] The present application has the beneficial effects that: the first handle and the second handle are hingedly connected, a fulcrum is formed through the hinge point, and the ablation head can be accurately positioned based on this reference, without the phenomenon of mispositioning; the whole structure is simple, easy to operate, can realize arteriovenous fistuloplasty through skin puncture, can effectively reduce surgical wound and reduce surgical risk.

[0007] Preferably, the first handle and the first ablation tube are connected through a first positioning joint, and the second handle and the second ablation tube are connected through a second positioning joint.

[0008] The beneficial effects of the above further scheme are that the first handle and the first ablation tube, and the second handle and the second ablation tube, are detachably connected while ensuring positioning accuracy and accuracy.

[0009] Preferably, the first positioning joint and / or the second positioning joint is square, triangular or cross-shaped.

[0010] The beneficial effects of the above further scheme are that the first handle and the first ablation tube, and the second handle and the second ablation tube, are detachably connected while ensuring positioning accuracy and accuracy.

[0011] Preferably, the first handle is provided with a first fitting slot at one end matched with one end of the first positioning joint, and the first ablation tube is provided with a second fitting slot at one end matched with the other end of the first positioning joint, and the two ends of the first positioning joint are clamped with the first fitting slot and the second fitting slot respectively.

[0012] Preferably, the second handle is provided with a third fitting slot at one end matched with one end of the second positioning joint, and the second ablation tube is provided with a fourth fitting slot at one end matched with the other end of the second positioning joint, and the two ends of the second positioning joint are clamped with the third fitting slot and the fourth fitting slot respectively.

[0013] The above further scheme has the beneficial effect that the fitting slot and the positioning joint are matched to achieve better clamping effect.

[0014] Preferably, the first ablation tube and / or the second ablation tube is a hollow tube, and the electrode wire is arranged in the hollow tube.

[0015] The above further scheme has the beneficial effect that the hollow ablation tube is used to accommodate the electrode wire and the guide wire.

[0016] Preferably, the first ablation tube and / or the second ablation tube is a hard plastic.

[0017] Preferably, the first ablation tube and / or the second ablation tube is a metal material, and the metal material is provided with an insulating outer layer.

[0018] Preferably, the first ablation head and the second ablation head are sheet-shaped conductive metals, and the first ablation head and the second ablation head are arranged on opposite surfaces of the first ablation tube and the second ablation tube, and when the free ends of the first ablation tube and the second ablation tube are in contact, the two sheet-shaped conductive metals just overlap.

[0019] The above further scheme has the beneficial effect that the fulcrum type positioning reference ensures accurate positioning of the ablation head end and avoids ablation misalignment and other phenomena.

[0020] Preferably, the first handle and the second handle are hinged through a fulcrum pin shaft, one end of the fulcrum pin shaft is hinged with the first handle, and the other end is hinged with the second handle.

[0021] The above further scheme has the beneficial effect that the fulcrum pin shaft forms spatial interlacing of the instrument, which is suitable for the principle structure and mode of spatial interlacing of blood vessels. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor based on the embodiments in the present application.

[0023] Fig. 1 A front view of a clamp type occlusion arteriovenous fistula forming device provided by the present application;

[0024] Fig. 2 A side view of a clamp type occlusion arteriovenous fistula forming device provided by the present application;

[0025] Fig. 3 A schematic view of shape 1 of the first / second positioning joint in a clamp type occlusion arteriovenous fistula forming device provided by the present application;

[0026] Fig. 4 A schematic view of shape 2 of the first / second positioning joint in a clamp type occlusion arteriovenous fistula forming device provided by the present application;

[0027] Fig. 5 A schematic view of shape 3 of the first / second positioning joint in a clamp type occlusion arteriovenous fistula forming device provided by the present application.

[0028] Explanation of reference signs:

[0029] 1, first handle; 2, second handle; 3, first ablation tube; 4, second ablation tube; 5, first ablation head; 6, second ablation head; 7, fulcrum pin shaft. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] It should be noted that similar reference numerals and letters refer to like items in the accompanying drawings, and once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0033] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed during use, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] As shown in Figs. 1-5 A pincer type occlusion arteriovenous fistula forming device, comprising a first handle 1 and a second handle 2 hinged to each other, the first handle 1 is connected with a first ablation tube 3 at the end, the second handle 2 is connected with a second ablation tube 4 at the end, the free end of the first ablation tube 3 is provided with a first ablation head 5, the free end of the second ablation tube 4 is provided with a second ablation head 6, and the first ablation head 5 and the second ablation head 6 are respectively connected with a power supply through respective electrode wires. Using the hinged first handle 1 and the second handle 2, a fulcrum is formed through the hinge point, and based on this, the ablation head can be accurately positioned, and the phenomenon of ablation misplacement will not occur; the whole structure is simple and easy to operate, and can realize arteriovenous fistula through percutaneous puncture, effectively reduce the surgical incision, and reduce the surgical risk.

[0036] The first handle 1 and the second handle 2 are only a force applying mechanism, the purpose is to make the first ablation tube 3 and the second ablation tube 4 rotate through the fulcrum to accurately position, the first handle 1 and the second handle 2 can be various forms, not limited to Figs. 1-2 the handle form in the

[0037] The first handle 1 and the first ablation tube 3 are connected by a first positioning connector, and the second handle 2 and the second ablation tube 4 are connected by a second positioning connector. The first positioning connector and / or the second positioning connector can be any shape other than circular. Preferably, the first positioning connector and / or the second positioning connector is square, triangular, or cross-shaped (e.g., Figs. 3-5 (As shown); its purpose is to ensure that the handle and the ablation tube cannot rotate after the first positioning connector and / or the second positioning connector are positioned, and that the direction is unique. This ensures that the first handle 1 and the first ablation tube 3, as well as the second handle 2 and the second ablation tube 4, are detachably connected while maintaining positioning accuracy and precision.

[0038] The first handle 1 is connected to the first ablation tube 3 at one end, which is provided with a first adapter groove that matches one end of the first positioning connector. The first ablation tube 3 is connected to the first handle 1 at one end, which is provided with a second adapter groove that matches the other end of the first positioning connector. The two ends of the first positioning connector are respectively locked with the first adapter groove and the second adapter groove.

[0039] The end of the second handle 2 connected to the second ablation tube 4 is equipped with a third adapter groove that matches one end of the second positioning connector. The end of the second ablation tube 4 connected to the second handle 2 is equipped with a fourth adapter groove that matches the other end of the second positioning connector. Both ends of the second positioning connector are respectively engaged with the third adapter groove and the fourth adapter groove. By using adapter grooves and positioning connectors to match, a better engaging effect can be achieved.

[0040] The first ablation tube 3 and / or the second ablation tube 4 can be hollow tubes, with the electrode wires disposed inside the hollow tubes. The interior of the hollow ablation tubes is used to accommodate the electrode wires and guide wires. Alternatively, the ablation tubes can be solid tubes, with the electrode wires embedded inside the solid tube body.

[0041] When the first ablation tube 3 and / or the second ablation tube 4 are solid tubes, the first ablation tube 3 and / or the second ablation tube 4 can be made of rigid plastic.

[0042] When the first ablation tube 3 and / or the second ablation tube 4 are hollow tubes, the first ablation tube 3 and / or the second ablation tube 4 may be made of metal material, and the inner and outer surfaces of the metal material are provided with insulating layers.

[0043] The first ablation head 5 and the second ablation head 6 are sheet-like conductive metal pieces. These pieces are positioned on the opposing surfaces of the first ablation tube 3 and the second ablation tube 4. When the free ends of the first ablation tube 3 and the second ablation tube 4 contact, the two sheet-like conductive metal pieces overlap perfectly. This fulcrum-type positioning reference ensures precise positioning of the ablation head ends, preventing ablation misalignment.

[0044] The first handle 1 and the second handle 2 are hinged by a fulcrum pin shaft 7, one end of the fulcrum pin shaft 7 is hinged with the first handle 1, and the other end is hinged with the second handle 2; the fulcrum pin shaft 7 is used to form instrument space interlacing, and the principle structure and mode are used to adapt to vascular space interlacing.

[0045] The method for forming arteriovenous fistula by using the pincer type arteriovenous fistula forming device in the application is as follows: finding a radial artery and a vein accompanying the radial artery near a wrist, then respectively puncturing the vein and the radial artery along the blood vessel direction by using a puncture needle to enter the vein lumen and the artery lumen, respectively inserting guide wires as guides, respectively inserting catheters along the guide wires, then respectively inserting the first ablation tube 3 and the second ablation tube 4 in the design scheme along the catheters, then finding a suitable position for fistula formation, and withdrawing the guide wires and the catheters as guides. The first ablation tube 3 and the second ablation tube 4 are connected with the first handle 1 and the second handle 2 through the first positioning joint and the second positioning joint, then the first handle 1 and the second handle 2 are connected through the rotating pin shaft 7, the first handle 1 and the second handle 2 can rotate around the rotating pin shaft 7, and the rotating pin shaft 7 can ensure that the two ablation heads can be accurately positioned. During the operation, the first handle 1 and the second handle 2 are operated to make the arteriovenous vessels close to each other, clamp the arteriovenous vessel walls and the soft tissues between them, and tightly adhere to the electrode ablation pieces, then the ablation heads are powered on to punch the arteriovenous vessels and form a fistula.

[0046] The above only describes the preferred embodiments of the application and is not used to limit the application, and any modification, equivalent replacement and improvement within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A clamp-type arteriovenous fistula formation device, characterized in that, The utility model relates to a kind of ablation device, including mutually articulated first handle (1) and second handle (2), the first handle (1) end is connected with first ablation tube (3), the second handle (2) end is connected with second ablation tube (4), the free end of the first ablation tube (3) is configured with first ablation head (5), the free end of the second ablation tube (4) is configured with second ablation head (6), the first ablation head (5) and second ablation head (6) are respectively connected with power supply by respective electrode wire;The first ablation head (5) and second ablation head (6) are sheet-like conductive metal, the first ablation head (5) and second ablation head (6) are arranged on the opposite surface of first ablation tube (3) and second ablation tube (4), when the first ablation tube (3) and second ablation tube (4) free end contact, two sheet-like conductive metals just coincide; The first handle (1) and first ablation tube (3) are connected by first positioning joint, and the second handle (2) and second ablation tube (4) are connected by second positioning joint; The first handle (1) and second handle (2) are articulated by fulcrum pin shaft (7), one end of the fulcrum pin shaft (7) is articulated with the first handle (1), and the other end is articulated with the second handle (2).

2. A clamp-on occlusive arteriovenous fistula creation device according to claim 1, wherein, The first positioning joint and / or second positioning joint are square, triangular or cross-shaped.

3. A clamp-on venous fistula creation device according to claim 2, wherein, The end of the first handle (1) connected with the first ablation tube (3) is provided with a first matching groove matched with one end of the first positioning joint, and the end of the first ablation tube (3) connected with the first handle (1) is provided with a second matching groove matched with the other end of the first positioning joint, and the two ends of the first positioning joint are clamped with the first matching groove and the second matching groove respectively.

4. The device according to claim 2 or 3, wherein The end of the second handle (2) connected with the second ablation tube (4) is provided with a third matching groove matched with one end of the second positioning joint, and the end of the second ablation tube (4) connected with the second handle (2) is provided with a fourth matching groove matched with the other end of the second positioning joint, and the two ends of the second positioning joint are clamped with the third matching groove and the fourth matching groove respectively.

5. The device of claim 1, wherein the device is configured to form a fistula between an artery and a vein. The first ablation tube (3) and / or second ablation tube (4) are hollow tubes, and the electrode wire is arranged in the hollow tube.

6. A clamp-on occlusive arteriovenous fistula creation device according to claim 1, wherein, The first ablation tube (3) and / or second ablation tube (4) are hard plastic.

7. The device of claim 1, wherein the device is configured to form a fistula between an artery and a vein. The first ablation tube (3) and / or second ablation tube (4) are metal materials, and an insulating outer layer is arranged outside the metal materials.

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