Disclosed is an apparatus and method for the treatment of the symptoms of obstructive prostatism. The apparatus comprises an expandable dilation catheter and preferably an axially elongate sheath, adapted for transurethral insertion via the external opening of the urethra. The sheath...http://www.google.co.uk/patents/US5836951?utm_source=gb-gplus-sharePatent US5836951 - Balloon dilation catheter
