Disclosed herein is a catheter device which is operably positionable for use in a biological conduit. The catheter device includes a catheter body having a proximal end and a distal end; a flexible housing; a work element and a sleeve. The housing connects to the distal end of the catheter body and holds...http://www.google.com/patents/US5906627?utm_source=gb-gplus-sharePatent US5906627 - Catheter device having a selectively flexible housing
