Patent ID: 7722558

Claim:
A trocar sleeve for insufflating a body cavity without damaging a tissue in the body cavity that can occur during transient conditions within the trocar sleeve comprising: a housing; an inlet port connected to said housing; a first member connected to said housing, said first member having a sidewall forming a lumen of fixed size therein; a trocar located in said lumen; and a second member spaced from and maintained in a fixed condition with respect to said first member, said second member coaxial with said first member along an entire length and circumference of said members to form an open circumferentially continuous annular chamber therebetween, said open chamber free of obstruction, said annular chamber having an open end located distal and coaxial to said housing, said second member having a plurality of apertures therein with the plurality of apertures each having a cross sectional fluid discharge area and each having a fluid stream discharging into a body cavity with the total fluid cross sectional fluid discharge area of said plurality of apertures maintaining a velocity of fluid stream discharging from each of the plurality of apertures in a non jet streaming condition whether or not the trocar is present in the lumen.