Patent ID: 8551049

Claim:
A device for safe, effective and efficient evacuating of contaminated insufflated gas from a surgical cavity comprising: a housing defining an elongate trocar sleeve having a distal tapered section; a working channel defined within the trocar sleeve, comprising an upper portion of a single lumen, wherein the upper portion of the single lumen functions as a working channel to allow access for instruments to the surgical cavity through the single lumen; a gas evacuating conduit; comprising a lower portion of the single lumen, the lower portion of the single lumen functioning as a working channel to allow access for instruments to the surgical cavity through the single lumen and also functioning to evacuate contaminated gas from the surgical cavity, a plurality of gas evacuation ports disposed through the trocar sleeve in the lower portion of the single lumen and allowing fluid communication between the surgical cavity and the lower portion of the single lumen, an upper chamber in fluid communication with the lower portion of the single lumen, wherein the single lumen has a volume, the upper chamber having a volume that is larger than volume of the single lumen, a plurality of apertures disposed between the upper chamber and the lower portion of the single lumen, allowing fluid communication therebetween, a restrictor plate having an upper and lower surfaces and comprising a plurality of restrictor plate ports bounding the upper chamber, the restrictor plate ports allowing fluid communication between the upper chamber and an upper region of the gas evacuating conduit, a filtration element disposed on the upper surface of the restrictor plate and within the upper chamber, the upper region of a gas evacuating conduit in fluid communication with the upper chamber and defined by the trocar sleeve housing and the working channel wherein the working channel comprises a radiused curved section for directing evacuating gas radially outward against the trocar sleeve housing within the upper region of the gas evacuating conduit and creating a turbulent environment, and a fluid regulation conduit in operative angled connection and fluid communication with the upper region of the gas evacuating conduit and the turbulent environment, comprising a proximal gas outflow lumen having a diameter, a distal gas outflow lumen having a diameter approximately the same as the diameter of the proximal gas outflow lumen, and a flow regulation lumen having a diameter that is smaller than the diameter of the proximal and distal gas outflow lumens, the flow regulation lumen further comprising a flow regulator therein for actuating the evacuating the gas from the surgical cavity; and an external vacuum source in operative connection and actuable fluid communication with the flow regulation conduit, the upper region of the gas evacuating conduit, the filtration element, the restrictor plate ports, the upper chamber, the single lumen, the gas evacuation ports and the surgical cavity.