| 摘要 |
A surgical access device for use during a surgical procedure is disclosed and includes a housing, an access member and a seal assembly. The access member extends distally from the housing and is dimensioned for positioning within tissue. The seal assembly is disposed in mechanical cooperation at least partially within the housing and comprises an instrument seal and a zero-closure valve. The instrument seal comprises an outer portion and an inner portion. The inner portion has an aperture extending therethrough. The instrument seal is configured to maintain a substantially fluid-tight seal with respect to a surgical instrument inserted therethrough. The zero-closure valve is configured to maintain a substantially fluid-tight seal in the absence of a surgical instrument inserted therethrough. The zero-closure valve includes an annular groove disposed along an inner periphery thereof and is configured and dimensioned to accommodate an outer periphery of the instrument seal.
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