A shielded tip catheter for use with a pulsed energy source for fracturing deposits such as urinary and biliary stones and atherosclerotic plaque in the human body is disclosed. The flexible catheter has a shielded tip structure which is adapted for insertion through a fluid passage in a living body....http://www.google.es/patents/US5425735?utm_source=gb-gplus-sharePatente US5425735 - Shielded tip catheter for lithotripsy
