A retractor endoscope for less invasive, direct access endoscopic surgery includes a rigid frame capable of supporting applied loads required to perform retraction of an incision site. The rigid frame includes a handle at one end and a lower blade mount rotatably connected to the opposite end....http://www.google.es/patents/US5813978?utm_source=gb-gplus-sharePatente US5813978 - Method and apparatus for direct access endoscopic surgery
Method and apparatus for direct access endoscopic surgery
