The present invention is directed to an apparatus for use in internal surgical procedures and is particularly advantageous for use in laparoscopic surgical procedures. An example implementation is directed to a tool having a depth-adjustable cannula having an upper portion that rests on the body, and...http://www.google.fr/patents/US20010029353?utm_source=gb-gplus-shareBrevet US20010029353 - Laparoscopic tool and method
