Innerless dilatation balloon catheter

Details Innerless dilatation balloon catheter Innerless dilatation balloon catheter

1994-09-27

1995-10-03

Maglione, Corrine

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

606194, A61M 2902

Patent

active

054547890

ABSTRACT:
An "innerless" balloon catheter controls fluid flow past the guide wire at the distal end of the catheter by a combination of flow resistance and a pressure responsive valve. The catheter includes a shaft which carries an inflatable balloon at its distal end. The shaft has a lumen therethrough with the lumen being in fluid communication with the balloon interior for inflating and deflating the balloon via the shaft lumen. The catheter further includes a lumen extension through the balloon, with the lumen extension being in fluid communication with the shaft lumen. A guide wire extends through the shaft lumen and the lumen extension and out the distal end of the balloon. The resistance to fluid flow past the guide wire in the lumen extension is substantially greater than the resistance to fluid flow between the shaft lumen and the balloon interior. A valve member is responsive to the pressure in the balloon interior for blocking fluid flow through the lumen extension during continuing inflation and at least the initial deflation of the balloon.

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