Catheter for use in biliary procedures, including a shaft having a proximal end and a distal end. A guidewire lumen is carried by the shaft extending from a location proximal the distal end of the shaft to a location proximate the distal end of the shaft. An opening is included for accessing the guidewire...http://www.google.es/patents/US6312404?utm_source=gb-gplus-sharePatente US6312404 - Single operator exchange billiary catheter
