Tissue scissors used for ureteroscope

Abstract

The invention discloses tissue scissors for an ureteroscope. The tissue scissors include a first handle and a second handle which are hinged, the end, away from the handheld end, of the first handle is provided with a guide rod internally provided with a through hole, the end, away from the first handle, of the guide rod is provided with two blades cooperating in use, the end, away from the handheld end, of the second handle is provided with a traction wire, the traction wire passes through the through hole of the guide rod and is connected with the ends, close to the first handle, of the blades, the diameter of the guide rod is smaller than the diameter of an operation channel of the ureteroscope, and the maximum size of the blades is smaller than the diameter of the operation channel ofthe ureteroscope. The tissue scissors for the ureteroscope achieves the removal of local tissue without heat damage, shearing is easy to perform, and the cutting depth, length and direction can be accurately controlled.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to tissue scissors for ureteroscopes. Background technique [0002] Existing tissue-cutting surgical instruments used through the operating channel of the ureteroscope include: laser fibers, rod-shaped electrodes, cold knives, and expansion balloons. Soft tissue cutting, vaporization, tearing and other operations. [0003] Both laser fiber cutting and electrode cutting have obvious thermal damage, leading to local tissue cell necrosis, local fibrous hyperplasia and scar formation after operation, and these fibrous hyperplasia and scars are likely to form ureteral strictures. Because the cold knife cuts the ureter axially, and the ureter is surrounded by soft tissue, the tube wall itself is tough, so the ureter tends to move with the knife's movement direction during cold knife cutting, and it is difficult to cut tissue. The operation of tearing the ureteral wall by bal...

AI Technical Summary

Problems solved by technology

[0003] Both laser fiber cutting and electrode cutting have obvious thermal damage, resulting in local tissue cell necrosis, postoperative local fibrous hyperplasia and scar formation, and these fibrous hyperplasia and scars are likely to form ureteral stenosis

Because the cold knife cuts the ureter axially, and the ureter is surrounded by soft tissue, the tube wall itself is tough, so the ureter tends to move with the direction of the knife during cold knife cutting, and it is difficult to cut tissue

The operation of tearing the ureteral wall by balloon inflation is difficult to control the location, direction and length of the ureteral wall laceration. The pressure on the tube wall during balloon inflation can easily lead to local ischemia and hypoxia, which is prone to fibrous hyperplasia and recurrence of stenosis after surgery. higher probability

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