Trocar Assembly

A trocar sleeve assembly comprising:

• a cannula;
• a housing assembly connected to said cannula to define a working channel extending axially therethrough, wherein said housing assembly comprises a housing that defines a first opening in fluid communication with said working channel and a second opening in fluid communication with said working channel, said second opening being axially spaced from said first opening, a sleeve slidably received over said housing to define an annular region between said sleeve and said housing, a first sealing member forming a first seal between said sleeve and said housing, and a second sealing member forming a second seal between said sleeve and said housing, said second sealing member being axially spaced from said first sealing member to define a chamber in said annular region;
• and
• an insufflation port in fluid communication with said chamber,
• wherein said sleeve is slidable relative to said housing between at least a first position, wherein said chamber is in fluid communication with both said first and said second openings, and a second position, wherein said chamber is in fluid communication with said second opening, but fluidly decoupled from said first opening.