EXPANSION TOOL FOR ESOPHAGEAL STRICTURE REGION USING SHAPE MEMORY ALLOY

摘要

PURPOSE: An expansion tool for an esophageal stricture region using a shape memory alloy is provided to prevent the permeation of cancer cells into the esophagus, and to continuously keep an installation condition thereof by preventing the sliding of the tool. CONSTITUTION: The expansion tool for an esophageal stricture region comprises a hollow cylindrical body(2) having a plurality of diamond shaped spaces(3) defined by weaving a shape memory alloy material; both expanded portions(5) having a diameter larger than a diameter of the body; a coating layer(7) applied to the whole surface of the tool; and a separate non-coated expansion tool(10') surrounding around the body in order to prevent the sliding of the tool. The separate non-coated expansion tool has a hollow cylindrical body(2') having a plurality of diamond-shaped spaces(3') defined by weaving a separate superelastic shape memory allow material.