An improved surgical instrument for the removal of previously fragmented tissues and fluids from a patient through a small incision including a multi-lumen cannula, one lumen of which is used to supply an irrigating fluid to suspend and dilute the fragmented tissue and the other lumen for the application...http://www.google.fr/patents/US6540713?utm_source=gb-gplus-shareBrevet US6540713 - Vented aspirator and method
