A balloon catheter comprises a catheter body having an elastomeric balloon at its distal end. The balloon has a small diameter vent hole disposed near its distal end. The balloon catheter may be prepared by flushing an inflation lumen and the interior of the balloon with a suitable liquid flushing...http://www.google.es/patents/US5728065?utm_source=gb-gplus-sharePatente US5728065 - Self-venting elastomeric balloon catheter
