A flexible endoscopic surgical port comprises a trocar tube or cannula made partially or entirely of flexible material which can be inserted into a body wall at an intercostal location to allow the insertion and manipulation of endoscopic surgical instruments within the thoracic cavity. The surgical...http://www.google.fr/patents/US5490843?utm_source=gb-gplus-shareBrevet US5490843 - Flexible endoscopic surgical port
