Stone Basket Disposal Appliance

Abstract

The stone extraction basket type treatment instrument of the present invention includes a sheath, a top end cover installed on the top of the sheath and having a plurality of grooves, a plurality of stone retrieval basket wires and an operation wire forming the stone extraction basket, and the plurality of grooves have a first A groove and a second groove, the first groove has a first surface inclined from the bottom surface of the first groove toward the inner peripheral surface of the tip cover, the first surface is passed through the first In the bottom surface of the groove, at least the inner peripheral surface side of the tip cover is chamfered, and the second groove has a second surface from the bottom surface of the second groove toward the tip cover. The inner peripheral surface is inclined, and the second surface is formed by chamfering at least the inner peripheral surface side of the tip cover in the bottom surface of the second groove into a shape different from that of the first surface, and the When the operation wire is pulled with the object to be disposed in the stone retrieval basket, the plurality of stone retrieval basket wires are pulled so as to pass through the plurality of different grooves respectively, and the breaking force of the stone retrieval basket wires is The first side and the second side are different.

Description

technical field [0001] The invention relates to a stone basket-type disposal device. Background technique [0002] Conventionally, there has been known a basket-type grasping forceps for collecting stones, etc., which are inserted into a conduit such as a bile duct in the body (for example, refer to Patent Document 1). Since the stone basket-type grasping forceps have a structure in which foreign matter is held by a plurality of wires, when collecting a large foreign matter, the stone basket may not be pulled out from the pipeline without holding the foreign matter. For example, in the stone basket type grasping forceps described in Patent Document 1, the stone basket cannot be pulled out from the pipeline unless the foreign matter is detached from the plurality of wires. [0003] prior art literature [0004] Patent Literature [0005] Patent Document 1: Japanese Patent Laid-Open No. 2013-22386 SUMMARY OF THE INVENTION [0006] Invention to solve problem [0007...

AI Technical Summary

Problems solved by technology

Since the stone extraction basket type gripping pliers have a structure to hold foreign objects with multiple wires, when recovering large foreign objects, sometimes the stone extraction basket cannot be pulled out from the pipeline without holding the foreign objects.

For example, in the stone-taking basket-type gripping pliers described in Patent Document 1, if the foreign matter does not escape from between the multiple wires, the stone-taking basket cannot be pulled out from the pipeline.

Images