Patent ID: 6017333
Filing Date: 2000-01-25
Classification: A61B,A61M

Abstract:
A trocar assembly comprising:a cannula having a proximate end, a distal end, a central opening extending along a longitudinal central axis of said cannula, an inner wall facing the central opening and an outside wall facing away from the central opening;an inner trocar mounted inside the central opening of the cannula, said inner trocar having a proximate end and a distal end;a body member that connects to the proximate end of said cannula;a conduit connected to said body member for supplying fluid to said cannula;fluid pumping means connected to said conduit for pumping fluid to said cannula;four fluid passages arranged approximately parallel to and separate from the central opening in said cannula, said passages arranged approximately equally around the periphery 90.degree. apart and connected to said pumping means via said conduit near the proximate end of said cannula, said four fluid passages terminating in a respective orifice, said orifices opening into said central opening in said cannula, each of said orifices extending transverse to the axis of the central opening in said cannula and located near the distal end of said central opening, for cleaning medical instruments that are inserted through the central opening of said cannula,said four fluid passages being formed on the outside wall of said cannula, said at least one passage being permanently open for the flow of fluid to said orifice.