Patent ID: 8764647

Claim:
A surgical apparatus for positioning within a tissue tract accessing an underlying body cavity, which comprises: a seal anchor member comprising a leading end, a trailing end, and at least one longitudinal port defining a passage extending between the leading and trailing ends and being configured for reception of an object, the seal anchor member formed of a compressible material such that the seal anchor member is transitionable between an expanded state and a compressed state; and a membrane having a closed configuration and an open configuration, the membrane formed across the at least one longitudinal port in the closed configuration, wherein when the membrane is in the closed configuration, the membrane defines a gas impermeable barrier across the at least one longitudinal port, and wherein rupturing the membrane in the closed configuration irreversibly changes the membrane to the open configuration such that, in the absence of the object, gas is in communication across the membrane through the at least one longitudinal port between the leading and trailing ends of the seal anchor member.