A surgical device for endoscopic surgical procedures capable of preventing injuries to internal organs during insertion. The surgical device can include one or more of the following: at least one sharp bladed edge, a mechanical tissue protection device that includes a series of thin plastic guards sliding...http://www.google.fr/patents/US20020161387?utm_source=gb-gplus-shareBrevet US20020161387 - Safety trocar with progressive cutting tip guards and gas jet tissue deflector
Safety trocar with progressive cutting tip guards and gas jet tissue deflector
