Patent ID: 6447479
Filing Date: 2002-09-10
Classification: A61M

Abstract:
A blood vessel dilatation apparatus comprising:an inner tube having a first lumen whose distal end is open, said inner tube having a front end; an outer tube coaxial with said inner tube, having a front end at a position rearward a predetermined length from said front end of said inner tube, and forming a second lumen between said outer tube and an outer surface of said inner tube; a dilatation member contractible or foldable, having a front end portion secured to said inner tube and a rear end portion secured to said outer tube and communicating with said second lumen in the vicinity of a rear end thereof; a first opening provided at a rear end portion of said inner tube and communicating with said first lumen; and a second opening provided at a rear end portion of said outer tube and communicating with said second lumen, wherein said outer tube has a front part having a comparatively small diameter relative to another portion of the outer tube and extending rearward a predetermined length from a position at which said outer tube and said dilatation member are connected with each other; and a rear part located rearward of said front part and having an inner diameter greater than that of said front part at least in a greater part thereof; and said outer tube is fixed to said inner tube through an inner surface of said rear part at a front end portion of said rear part of said outer tube.