Seal assembly for access device

摘要

A trocar having a working channel extending between a distal end and a proximal end is adapted for disposition across a body wall. A valve is disposed in the working channel so that an instrument inserted into the working channel extends through the valve resulting in undesirable friction forces. The valve is provided with a first wall which intersects a second wall to define a contact surface with an area less than the combined area of the first wall and second wall. This surface provides a substantially reduced contact with the instrument thereby reducing the friction forces and facilitating movement of the instrument through the working channel. An associated method includes the step of orienting the first wall and the second wall to provide the contact surface with the configuration of a line.