Patent ID: 6723113
Filing Date: 2004-04-20
Classification: A61M

Abstract:
A balloon catheter having a balloon and a catheter body formed of dissimilar polymeric materials, said balloon catheter comprising:a catheter body including an outer tubular member having proximal and distal ends and a lumen extending therethrough, said outer tubular member formed from a first polymeric material; said catheter body further including an inner tubular member having proximal and distal ends and a lumen extending therethough, said inner tubular member being coaxial with said outer tubular member, said inner tubular member running longitudinally through said outer tubular member and extending distally beyond the distal end of said outer tubular member, said inner tubular member formed from said first polymeric material; an inflatable balloon having a main body portion and proximal and distal portions extending from said main body portion, said proximal and distal portions each having an inner and outer surface, said inflatable balloon formed from a second polymeric material different from said first polymeric material; a first layer of adhesive material interposed between said inner surface of the proximal portion of the balloon and said distal end of the outer tubular member to bond said inner surface of the proximal portion of the balloon to said distal end of the outer tubular member; a first metallic retaining ring positioned over and crimped tightly around said proximal portion of the balloon to reinforce the bond formed with said first layer of adhesive material and said distal end of the outer tubular member; a proximal retaining ring sleeve is in overlapping contact with the proximal end of said first retaining ring and extends to at least half of the length of said first retaining ring, said proximal retaining ring sleeve being secured to said outer tubular member and to said first retaining ring thereby preventing said first retaining ring from moving along the length of said outer tubular member; a second layer of adhesive material interposed between said inner surface of the distal portion of the balloon and said distal end of the inner tubular member to bond said inner surface of the distal portion of the balloon to said distal end of the inner tubular member; a second metallic retaining ring positioned over and crimped tightly around said distal portion of the balloon to reinforce the bond formed with the second layer of adhesive material and said distal end of the inner tubular member; and, a coupling member having a lumen extending therethrough, said coupling member being mounted on the proximal end of the inner tubular member and the lumen of the coupling member communicating with the lumen between the outer tubular member and the inner tubular member so that fluid may be injected into the lumen of the coupling member to inflate the balloon.