| 摘要 |
A sheath and a method of operating the sheath are provided for assisting movement of an endoscope within a cavity of a patient's body. The sheath includes an everting shaft having an internal and external lining with an inflatable lumen between them, proximal and distal regions and a lumen for receiving the endoscope. An expandable member is positioned along the distal region, which is expandable from a first diameter, at which the expandable member grips the endoscope to a second, larger diameter at which the expandable member engages a wall of the cavity.
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