| 摘要 |
A sealing mechanism for sealing a trocar used in medical procedures is provided. The cannula is configured to allow passage therethrough of medical devices. The cannula is attached to a conduit piece formed to define at least one channel. A compressible annular seal is positioned in the at least one channel to allow passage through its central aperture of a medical device. An adjustable mechanism is provided for compressing the compressible annular seal to provide an airtight seal across the least one channel. A duckbill flap valve is also positioned in the at least one channel adjacent to the compressible annular seal to receive the medical device after its insertion through the central aperture of the compressible annular seal. Included on the external surface of the cannula is structure for engaging the body wall of a patient for retaining the trocar in place.
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