| 摘要 |
A flexible external cannula sheath assembly includes a tubular member having a proximal end portion and a distal end portion and a seal positioned adjacent the distal end portion of the tubular member. The seal defines a hole in a central portion thereof for receiving surgical instruments therethrough. The flexible sheath is formed of a flexible material and is configured and dimensioned to surround an external surface of a cannula. The seal is displaced a predetermined distance from a distal end of the cannula to provide additional flexibility to the assembly.
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