Patent ID: 9446208
Filing Date: 2016-09-20
CPC Classification: A61B,A61M

Claim Text:
1. A method of conditioning an insufflation gas during an endoscopic surgical procedure including the steps of: extending a first end of a cannula of a trocar into a body cavity with said trocar having an annular chamber supporting a centrally located cylindrical instrument passage therein with said cylindrical instrument passage connecting an instrument inlet port of said trocar to said cannula; flowing an insufflation gas into an annular plenum chamber of the annular chamber in the trocar; conditioning the insufflation gas in the trocar by an action selected from the group of (a) filtering, (b) heating, (c) hydrating, (d) heating and hydrating, (e) filtering and heating, (f) filtering and hydrating, and (g) filtering, heating and hydrating by flowing the insufflation gas through a conditioning media including a porous layer located between a hydrophilic member on a first side of the porous layer and a heater assembly located on an opposite side of the porous layer where the conditioning media comprises a spiral wound layer of the hydrophilic member, the heater assembly and the porous layer within the annular chamber in the trocar; and delivering the conditioned insufflation gas to the body cavity by flowing the conditioned insufflation gas from the annular chamber through an outlet port and into a passage of the cannula of the trocar.