Disposable arteriovenous blood vessel bridge

Abstract

The disposable arteriovenous blood vessel bridge comprises a left bridge connection mechanism, a right bridge connection mechanism and a length self-adaptive telescopic adjusting mechanism, the left bridge connection mechanism and the right bridge connection mechanism are detachably connected together in a butt joint mode, and the length self-adaptive telescopic adjusting mechanism is arranged between the butt joint faces of the left bridge connection mechanism and the right bridge connection mechanism; the left bridging mechanism comprises a pagoda-shaped blood vessel distraction connector and a left bridging extension tube, the left bridging extension tube is hinged to the butt joint face of the blood vessel distraction connector and can rotate on the blood vessel distraction connector, a right bridging extension tube is fixed to the blood vessel distraction connector of the right bridging mechanism, and a right butt joint plate is fixed to the end of the right bridging extension tube. The bridge can allow blood vessels to be subjected to lateral rotation adjustment after butt joint and fixation, and the problem of twisting of the blood vessels at the two ends is prevented; according to the bridge, butt joint and closure can be facilitated, meanwhile, the length self-adaptive telescopic adjusting mechanism is arranged between the two closure sections, and the length part, lost due to contracture, between the two blood vessels can be made up.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a disposable arteriovenous blood vessel bridge. Background Art

[0002] Vascular anastomosis refers to the process of connecting two severed blood vessels by suturing them together during surgery to restore their normal blood flow function. Common types of anastomosis include end-to-end anastomosis, end-to-side anastomosis, and side-to-side anastomosis. Vascular anastomosis surgery can only be performed after medical measures such as personnel deployment, blood supply measures, and disinfection measures are properly prepared. When the surgical conditions do not meet the requirements, how to establish a temporary blood supply channel to prevent ischemic necrosis of organs caused by insufficient blood supply due to vascular severance is a technical problem that urgently needs to be solved.

[0003] The utility model patent with application number 202222346933.9 discloses an easy-to-operate vascular bridge, which can bridge and fix two severed blood vessels on both sides to form a temporary blood supply channel. However, the bridge currently has the following defects: 1. Suturing is required at the end to fix the blood vessel on the bridge, which does not meet the requirements of rapid docking; 2. After one end of the blood vessel is sutured and fixed on the bridge, the blood vessels on both sides can no longer be adjusted for lateral rotation, resulting in the problem of "twisting" of the blood vessels; 3. The blood vessels of some patients will contract, and the bridge cannot be adjusted in a small range to adapt to the missing length between the two blood vessels. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a disposable arteriovenous bridge, which can rely on the pagoda-like structure of the blood vessel expansion joint and the barb structure evenly distributed on the surface to quickly fix the blood vessel on the blood vessel expansion joint, without the need for other fixing mechanisms; the bridge can allow the blood vessel to be adjusted for lateral rotation after docking and fixation, to prevent the blood vessels at both ends from being "twisted"; the bridge can facilitate docking and jointing, and at the same time, a length adaptive telescopic adjustment mechanism is provided between the two joint sections, which can make up for the length missing between the two blood vessels due to contracture, thereby establishing a temporary blood supply channel to prevent ischemic necrosis of tissues and organs.

[0005] In order to achieve the above technical effects, the utility model is implemented through the following technical solutions:

[0006] A disposable arteriovenous vascular bridge comprises a left bridging mechanism, a right bridging mechanism and a length-adaptive telescopic adjustment mechanism. The left bridging mechanism and the right bridging mechanism are detachably connected to each other. The length-adaptive telescopic adjustment mechanism is arranged between the docking surfaces of the left bridging mechanism and the right bridging mechanism. The left bridging mechanism comprises a pagoda-shaped vascular expansion joint and a left bridging extension tube. The left bridging extension tube is hinged on the docking surface of the vascular expansion joint and can rotate on the vascular expansion joint. A left docking plate is fixed to the end of the left bridging extension tube. A telescopic adjustment screw and a limit screw are respectively fixed to the upper and lower sides of the left docking plate. The right bridging mechanism also includes a vascular expansion joint, a right bridging extension tube is fixed on the vascular expansion joint of the right bridging mechanism, a right docking plate is fixed to the end of the right bridging extension tube, locking holes are opened on the upper and lower sides of the right docking plate, a tension adjustment nut is hinged at the locking hole above the right docking plate, the telescopic adjustment screw passes through the locking hole and the tension adjustment nut above the right docking plate in sequence, the telescopic adjustment screw is threadedly connected to the tension adjustment nut, the limit screw passes through the locking hole below the right docking plate, the limit screw is threadedly connected to the limit nut, and the surface of the vascular expansion joint is evenly distributed with a number of anti-detachment barbs.

[0007] Furthermore, a funnel-shaped anti-backflow valve is arranged between the length adaptive telescopic adjustment mechanism and the docking surface of the left docking plate, a step-shaped release opening is opened on the left docking plate, and the funnel-shaped anti-backflow valve is squeezed and fixed in the step-shaped release opening.

[0008] Furthermore, the length adaptive telescopic adjustment mechanism includes a cylindrical base, a cylindrical telescopic slide and an adaptive reset spring coil. The base has limit slide grooves symmetrically opened on the upper and lower sides of the inner wall. Limit blocks are fixed on both sides of the end of the telescopic slide. The limit blocks are inserted into the limit slide grooves and can slide in the limit slide grooves. The adaptive reset spring coil is arranged in the gap between the base and the telescopic slide cylinder.

[0009] Furthermore, a circular channel with the same diameter is opened between the blood vessel expansion joint, the left bridging extension tube, the left docking plate, the right docking plate, and the right bridging extension tube, and the inner wall of the circular channel is coated with a phosphorylcholine anticoagulant coating.

[0010] Furthermore, the left bridging mechanism, the right bridging mechanism and the length adaptive telescopic adjustment mechanism are all made of medical plastics.

[0011] The beneficial effects of the utility model are as follows: the bridge can rely on the pagoda-like structure of the blood vessel expansion joint and the barb structure evenly distributed on the surface to quickly fix the blood vessel on the blood vessel expansion joint without the need for other fixing mechanisms; the bridge can allow the blood vessel to be adjusted for lateral rotation after docking and fixation to prevent the blood vessels at both ends from being "twisted"; the bridge can facilitate docking and jointing, and at the same time, a length adaptive telescopic adjustment mechanism is provided between the two joint sections, which can make up for the length missing between the two sections of the blood vessel due to contracture, thereby establishing a temporary blood supply channel to prevent ischemic necrosis of tissues and organs; the bridge can be used for arterial and venous bridging, and a funnel-shaped anti-backflow structure is provided in the bridge, which can simulate the venous valve to prevent blood backflow, and at the same time, the inner wall of the bridge is coated with an anticoagulant coating to prevent blood clotting at the bridging point. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 It is a schematic diagram of the assembly structure of a disposable arteriovenous vascular bridge;

[0014] Figure 2 It is a schematic diagram of the composition structure of a disposable arteriovenous vascular bridge;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of a disposable arteriovenous vascular bridge;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the length adaptive telescopic adjustment mechanism.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1-left bridging mechanism, 2-left bridging extension tube, 3-right bridging mechanism, 4-right bridging extension tube, 5-left docking plate, 6-right docking plate, 7-telescopic adjustment screw, 8-limiting screw, 9-tension adjustment nut, 10-limiting nut, 11-length adaptive telescopic adjustment mechanism, 12-anti-backflow valve, 13-step-shaped card release port, 14-anti-slip barb, 15-phosphorylcholine anticoagulant coating, 111-base, 112-telescopic slide, 113-adaptive reset spring coil, 114-limiting block, 115-limiting slide groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-3 As shown, a disposable arteriovenous vascular bridge comprises a left bridging mechanism 1, a right bridging mechanism 3 and a length-adaptive telescopic adjustment mechanism 11. The left bridging mechanism and the right bridging mechanism are detachably connected to each other, and the length-adaptive telescopic adjustment mechanism is arranged between the docking surfaces of the left bridging mechanism and the right bridging mechanism; the left bridging mechanism 1 comprises a pagoda-shaped vascular expansion joint and a left bridging extension tube 2, the left bridging extension tube 2 is hinged on the docking surface of the vascular expansion joint and can rotate on the vascular expansion joint, and a left docking plate 5 is fixed at the end of the left bridging extension tube 2, and a telescopic adjustment screw 7 and a limit screw are respectively fixed on the upper and lower sides of the left docking plate 5. Rod 8, the right bridging mechanism also includes a vascular expansion joint, a right bridging extension tube 4 is fixed on the vascular expansion joint of the right bridging mechanism, a right docking plate 6 is fixed on the end of the right bridging extension tube 4, locking holes are opened on the upper and lower sides of the right docking plate, a tension adjustment nut 9 is hinged at the locking hole above the right docking plate, the telescopic adjustment screw passes through the locking hole and the tension adjustment nut above the right docking plate in turn, the telescopic adjustment screw is threadedly connected to the tension adjustment nut, the limit screw passes through the locking hole below the right docking plate, the limit screw 8 is threadedly connected with a limit nut 10, and the surface of the vascular expansion joint is evenly distributed with a plurality of anti-detachment barbs 14.

[0021] A funnel-shaped anti-backflow valve 12 is provided between the length adaptive telescopic adjustment mechanism 11 and the docking surface of the left docking plate 5. A step-shaped release opening 13 is provided on the left docking plate 5, and the funnel-shaped anti-backflow valve is squeezed and fixed in the step-shaped release opening.

[0022] like Figure 4 As shown, the length adaptive telescopic adjustment mechanism 11 includes a cylindrical base 111, a cylindrical telescopic slide 112 and an adaptive reset spring coil 113. The inner wall of the base 111 is symmetrically provided with limit slide grooves 115 on the upper and lower sides. Limit blocks 114 are fixed on both sides of the ends of the telescopic slide 112. The limit blocks are inserted into the limit slide grooves and can slide in the limit slide grooves. The adaptive reset spring coil is arranged in the gap between the base and the telescopic slide. The telescopic slide 112 moves in the direction away from the base under the expansion effect of the adaptive reset spring coil. At this time, the base and the telescopic slide will be respectively supported on the left docking plate and the right docking plate.

[0023] In this embodiment, a circular channel with the same diameter is opened between the blood vessel expansion joint, the left bridging extension tube, the left docking plate, the right docking plate, and the right bridging extension tube. The inner wall of the circular channel is coated with a phosphorylcholine anticoagulant coating 15. The phosphorylcholine anticoagulant coating 15 can prevent blood from clotting at the bridge connection.

[0024] In this embodiment, the left bridging mechanism, the right bridging mechanism and the length adaptive telescopic adjustment mechanism are all made of medical plastics.

[0025] The specific working application of the device is as follows: the severed left and right segments of the blood vessel are respectively inserted along the ends of the left bridging mechanism 1 and the right bridging mechanism 3 until the end of the blood vessel reaches the rear end of the blood vessel expansion joint. At this time, the inner wall of the blood vessel is firmly fixed on the left bridging mechanism 1 and the right bridging mechanism 3 under the dual effects of the expansion effect of the blood vessel expansion joint and the anti-detachment barbs, and then the anti-backflow valve is inserted into the stepped release opening of the left docking plate, and then the length adaptive telescopic adjustment mechanism is inserted between the left docking plate and the right docking plate, and the telescopic adjustment screw and the limit screw on the left docking plate are respectively inserted into the left docking plate. Insert it into the locking hole of the right docking plate, insert the telescopic adjustment screw into the tension adjustment nut, and twist the tension adjustment nut 9. At this time, the telescopic adjustment screw and the limit screw will gradually extend from the right side of the right docking plate, and the left docking plate will move closer while compressing the length adaptive telescopic adjustment mechanism. After the severed blood vessel is stretched to an appropriate length, tighten the limit nut 10. At this time, the bridging operation of the blood vessel is completed; when the two sections of the bridged blood vessels have a "twisted" problem, the left bridging extension tube can be rotated to solve it; at this time, the bridge establishes a temporary blood supply channel to prevent ischemic necrosis of organs or tissues.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A disposable arteriovenous vascular bridge, characterized in that: The invention comprises a left bridging mechanism, a right bridging mechanism and a length-adaptive telescopic adjustment mechanism. The left bridging mechanism and the right bridging mechanism are detachably connected to each other. The length-adaptive telescopic adjustment mechanism is arranged between the docking surfaces of the left bridging mechanism and the right bridging mechanism. The left bridging mechanism comprises a pagoda-shaped vascular expansion joint and a left bridging extension tube. The left bridging extension tube is hinged on the docking surface of the vascular expansion joint and can rotate on the vascular expansion joint. A left docking plate is fixed to the end of the left bridging extension tube. A telescopic adjustment screw and a limit screw are respectively fixed on the upper and lower sides of the left docking plate. The right bridging mechanism The structure also includes a vascular expansion joint. A right bridging extension tube is fixed on the vascular expansion joint of the right bridging mechanism. A right docking plate is fixed to the end of the right bridging extension tube. Locking holes are opened on the upper and lower sides of the right docking plate. A tension adjustment nut is hinged at the locking hole above the right docking plate. The telescopic adjustment screw passes through the locking hole and the tension adjustment nut above the right docking plate in sequence. The telescopic adjustment screw is threadedly connected to the tension adjustment nut. The limit screw passes through the locking hole below the right docking plate. The limit nut is threadedly connected to the limit screw. A plurality of anti-detachment barbs are evenly distributed on the surface of the vascular expansion joint.

2. The disposable arteriovenous vascular bridge according to claim 1, characterized in that: A funnel-shaped anti-backflow valve is arranged between the length adaptive telescopic adjustment mechanism and the docking surface of the left docking plate, a step-shaped clamping opening is opened on the left docking plate, and the funnel-shaped anti-backflow valve is squeezed and fixed in the step-shaped clamping opening.

3. The disposable arteriovenous vascular bridge according to claim 1 or 2, characterized in that: The length adaptive telescopic adjustment mechanism includes a cylindrical base, a cylindrical telescopic slide and an adaptive reset spring coil. Limiting grooves are symmetrically opened on the upper and lower sides of the inner wall of the base. Limiting blocks are fixed on both sides of the end of the telescopic slide. The limiting blocks are inserted into the limiting grooves and can slide in the limiting grooves. The adaptive reset spring coil is arranged in the gap between the base and the telescopic slide.

4. The disposable arteriovenous vascular bridge according to claim 3, characterized in that: A circular channel with the same diameter is provided between the blood vessel expansion joint, the left bridge extension tube, the left docking plate, the right docking plate and the right bridge extension tube, and the inner wall of the circular channel is coated with a phosphorylcholine anticoagulant coating.

5. The disposable arteriovenous vascular bridge according to claim 4, characterized in that: The left bridging mechanism, the right bridging mechanism and the length self-adapting telescopic adjustment mechanism are all made of medical plastics.

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