US Patent 12059176 Surgical access device with differential pressure induced fluid evacuation

A surgical access device includes a tube and a housing coupled to the tube. The housing is configured for passage of a surgical instrument therethrough. The housing includes first and second chambers where the second chamber surrounds the first chamber. A seal is disposed in the first chamber. A port extends from the housing and is in fluid communication with the second chamber. A nozzle is defined between a distal portion of an outer wall of the first chamber and a wall of the housing. The nozzle is configured to direct fluid towards the second chamber.