초록

There is provided a catheter composed of a main body fitted with a shape memory alloy member and having a liquid injection means to supply warming liquid to have said member recover the original shape thereof.

대표청구항 ▼

A catheter for insertion of a shape memory alloy endoprosthesis into a stenosis comprising: a main body provided with an extensible balloon portion at a leading end thereof; a narrow body portion adjacent said balloon portion, fitted therearound with a cylindrical shape memory alloy endoprosthesis;

A catheter for insertion of a shape memory alloy endoprosthesis into a stenosis comprising: a main body provided with an extensible balloon portion at a leading end thereof; a narrow body portion adjacent said balloon portion, fitted therearound with a cylindrical shape memory alloy endoprosthesis; a slightly wider body portion at an end of said narrow body portion opposite said balloon portion, forming a bulge portion projecting thereat; a first lumen passing through said main body and terminating in said balloon portion for injection fluid into said balloon portion to cause inflation thereof; a second lumen passing through said main body to a distal end, through which a guide wire can pass; and a sheath substantially covering said main body except for said balloon portion, said sheath forming a third fluid injection lumen defined by an inner surface of said sheath and outer surface of said main body and having an inlet port provided at a rear end thereof to supply a warming fluid to said endoprosthesis located inside a front part of said sheath at said narrow body portion, at a temperature above a transition point of the shape memory alloy, to cause recovery of an original shape of said endoprosthesis.