US 11,849,969 B2
Cannula with smoke evacuation housing
Garrett P. Ebersole, Hamden, CT (US); Roy J. Pilletere, Middletown, CT (US); Justin Thomas, New Haven, CT (US); Nicolette L. Roy, Windsor Locks, CT (US); Saumya Banerjee, Hamden, CT (US); Jacob C. Baril, Norwalk, CT (US); and Matthew A. Dinino, Newington, CT (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Dec. 4, 2020, as Appl. No. 17/111,636.
Prior Publication US 2022/0175418 A1, Jun. 9, 2022
Int. Cl. A61B 17/34 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/3423 (2013.01) [A61B 17/00234 (2013.01); A61B 2017/00561 (2013.01); A61B 2017/3419 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A surgical access device comprising:
a cannula having a cannula housing and a tubular member extending from the cannula housing; and
a seal housing coupled to the cannula housing, the seal housing including:
a base attached to the cannula housing,
an instrument seal, and
a cover having a port, the cover having a lower cover portion and an upper cover portion attached to the lower cover portion, the lower cover portion attached to the base, the upper cover portion including projections contacting an upper surface of the lower cover portion, a wall, and windows defined between adjacent projections, the projections and the wall circumscribing a central opening of the upper cover portion, the wall radially spaced from the projections and defining a chamber between the wall and the projections, wherein the windows and the projections define a geometry of the chamber that is configured to direct a fluid in the seal housing towards the port, the port being connectable to a source of vacuum.