Intraluminal foreign object catching tool

Abstract

An objective of the present invention is to provide an intraluminal foreign object catching tool capable of dilating a catching member for catching a foreign object to an appropriate size. This foreign object catching tool 10 is for catching an intraluminal foreign object and comprises: a core 20; a catching member 30 movably disposed on the exterior side of the core 20, movement of the leading end of which being restricted in a prescribed position of the core 20, said member dilating due to contraction in an axial direction; a cylindrical member 50 positioned on the exterior side of the core20 and at a base end side of the catching member 30 for limiting movement of the base end side of the catching member 30; and a control member 60 positioned on the exterior side of the core 20 and onthe inner side of the catching member 30 for limiting the degree of contraction of the catching member 30 in the axial direction. Through relative movement of the cylindrical member 50 and the core 20, the catching member 30 contracts in the axial direction through the length limited with the core member 60 and dilates.

Description

technical field [0001] The present invention relates to an intraluminal foreign body capture tool for removing foreign matter such as thrombus and calculus formed in tubular organs such as blood vessels, bile ducts, pancreatic ducts, and urinary ducts. Background technique [0002] Foreign bodies such as thrombus, gallstones, pancreatic stones, and ureteral stones sometimes form in tubular organs such as blood vessels, bile ducts, pancreatic ducts, and urinary ducts. Therefore, such foreign bodies are captured and removed from the tubular organ. [0003] For example, the following Patent Document 1 describes a device for bridging the neck of an aneurysm, comprising: an expandable member capable of being positioned at the opening of a blood vessel in order to form a bridge across the opening of the aneurysm; a wire braided to form a basket; and a stretch wire configured to be combined with at least the distal end of the expandable member to control when an axial force compon...

AI Technical Summary

Problems solved by technology

In this case, in the apparatus of the above-mentioned Patent Document 1, the stretching wire must be stretched relative to the tube with delicate force addition and subtraction, and it is difficult to adjust to the desired expansion amount.

In addition, in the case of increasing the stretching amount of the stretching wire relative to the tube in order to obtain a sufficient expansion force of the expansion member, the expansion force of the expansion member may be too large, which may interfere with the lumen organs around the expansion member. the danger of

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