An optical endoscopic portal for providing a passage through a body cavity wall includes a cannula comprising an absorbent member having a distal end for positioning in a body cavity, a proximal end for positioning external of the body cavity and a passage between the distal and proximal ends for receiving...http://www.google.fr/patents/US5842971?utm_source=gb-gplus-shareBrevet US5842971 - Optical endoscopic portals and methods of using the same to establish passages through cavity walls
Optical endoscopic portals and methods of using the same to establish ...
