US Patent 11931072 Surgical access device with active smoke filtration

A surgical access device includes a housing with an elongate tubular member extending distally from the housing. The elongate tubular member has an open distal aperture. A first electrode is disposed in a first region of the elongate tubular member and circumscribes the elongate tubular member. The first electrode is coupled to an anode of a power supply and is configured to provide airborne particulate matter with a negative electric charge. A second electrode is disposed in a second region of the elongate tubular member and circumscribes the elongate tubular member. The second electrode is coupled to a cathode of a power supply and is configured to attract the airborne particulate matter.