Self-venting balloon dilatation catheter.

摘要

A self-venting balloon dilatation catheter (10) having a flexible tubular, member with first (13) and second (16) lumens extending therethrough. An inflatable balloon (17) is carried by the distal extremity of the tubular member in such a manner that the first lumen (13) extends through the balloon (17) and is out of communication with the interior of the balloon (17) and the second lumen (10) is in communication with the interior of the balloon (17). A venting device (21) is disposed between the balloon (17) and the tubular member (12) for venting air from the interior of the balloon (17) but inhibiting the escape of liquid from the balloon (17).