Vein valve resection instrument

Abstract

Disclosed is a vein valve resection instrument. The vein valve resection instrument comprises a blood vessel supporting tube, a resection structure and a butt-joint structure; a blood vessel supporting structure is arranged at the initial end of a blood vessel; the front end of the resection structure is a first globe-roof-shaped structure, the rear end of the resection structure comprises a globe-roof-shaped recess, and the tail end of the globe-roof-shaped recess forms a circular cutter; the front end of the butt-joint structure comprises a first globe-roof-shaped protruding structure matched with the globe-roof-shaped recess; the rear end of the butt-joint structure is provided with a second globe-roof-shaped protruding structure for ensuring smooth withdrawal; in addition, a setting channel of a traction guide wire is arranged between the resection structure and the butt-joint structure in the longitudinal direction; the setting channel of the resection structure and the traction guide wire are bonded together, and the traction guide wire does not penetrate out of the setting channel in the resection structure; the traction guide wire passes through the setting channel of the butt-joint structure; the butt-joint structure performs relative sliding motion on the traction guide wire; and a front push tube which pushes the butt-joint structure to move along the traction guide wire and is arranged on the outer side of the traction guide wire is additionally arranged. The vein valve resection instrument can effectively resect and bring out the valve, and is reasonable in structure and easy to use.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a venous valve resection device. Background technique [0002] Orthotopic saphenous vein bypass grafting is a surgical method for the treatment of lower extremity ischemia. It obtains the great saphenous vein, and then transplants it to the arterial vessel at the original position to anastomose with it; the orthotopic saphenous vein reported in the literature The 5-year patency rate of bypass grafting is similar to the 5-year patency rate of inverted great saphenous vein bypass grafting, and in situ great saphenous vein bypass grafting matches the corresponding arterial anastomotic caliber higher, which can be anastomosed to the pretibial , posterior tibial or even dorsalis pedis artery, etc., this kind of operation will not damage the vascular bed. [0003] However, because arterial blood has no valves, the great saphenous vein that does not turn over needs ...

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Problems solved by technology

[0003] However, because arterial blood has no valves, the great saphenous vein that does not turn over needs to be anastomosed after resection of the venous valves. Usually, venous valvulotomy is used for valve resection. At present, the common valvular knife usually enters the blood vessel along the direction of the valve, and then Reuse the back-end valvulotomy to destroy the valve to achieve the effect of ensuring smooth blood flow. The existing technical solutions include CN90207022-in situ venous valve cutter; CN201220694589-a kind of venous valve cutter; the existing technical solutions are all through The method of withdrawing the valvular knife is achieved by destroying the venous valve; the amount of venous valve resection cannot be guaranteed during the process, and the speed of withdrawal is high, which is prone to damage to the venous vessel; in addition, the traditional great saphenous vein is in a free state. If it cannot be stretched ahead of time, it will be difficult for the entire valvulectomy instrument to enter, and it will cause damage to the blood vessel without effective guidance when it is withdrawn, so the doctor needs to be very careful during the operation

[0004] In addition, after the great saphenous vein is dissociated, the venous lumen will be in a "compressed" state without perfusion. At this time, when the venous valve knife is inserted antegrade, it often causes difficulties in insertion and advancement, especially in relatively small saphenous veins. Under the circumstances; the lumen of the great saphenous vein whose valve has not been damaged lacks fluid lubrication, which leads to the adhesion of the valve knife to the vein wall, making it difficult to withdraw the valve knife. Vein graft failure

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