Patent ID: 7901380

Claim:
A surgical portal apparatus comprising: a housing; a portal member extending from the housing, the portal member dimensioned for positioning within tissue, the portal member defining a longitudinal axis and having a longitudinal opening for permitting passage of a surgical object; an iris seal disposed within the housing and defining an opening therethrough and being adapted to establish a substantial sealing relationship with the surgical object introduced within the opening, the iris seal including a plurality of leaf members adapted for movement relative to the longitudinal axis between a first relative position where the leaf members permit passage of the surgical object and a second relative position where the leaf members establish a substantial seal about the surgical object; and an actuation mechanism operatively coupled with the leaf members to move the leaf members between the first relative position and the second relative position, the actuation mechanism including a motor and resistive circuitry, the resistive circuitry adapted to detect an increase of load on the motor thereby causing the actuation mechanism to releasably secure the leaf members in the second relative position.