A safety-shielded trocar having an obturator with a linear cutting edge surface defining a base width substantially less than the diameter of the safety shield is disclosed. When the trocar is inserted through tissue, the tissue dilates from the width of the linear incision to accommodate the size of...http://www.google.es/patents/US5984921?utm_source=gb-gplus-sharePatente US5984921 - Method and apparatus for applying electrical energy to medical instruments
Method and apparatus for applying electrical energy to medical instruments
