| 摘要 |
Various methods and devices are provided for accessing an interior surgical site using an access portal which can be inserted and removed with minimal tissue damage and which can form a seal with tissue while inserted. Generally, a device is provided having a rigid elongate surgical access member with a lumen extending therethrough that is configured to receive a surgical tool. The device can also include a flexible sleeve having a lumen extending therethrough that is configured to receive the elongate surgical access member. A substantially rigid collar is provided disposed adjacent to a proximal end of the flexible sleeve and having a lumen extending therethrough that is configured to receive the elongate surgical access member. In an exemplary embodiment, the collar is movable relative to the elongate surgical access member to selectively configure the flexible sleeve in a relaxed condition in which the flexible sleeve has a relatively smooth outer tissue-contacting surface and a compressed condition in which the flexible sleeve has a plurality of protrusions formed on the outer tissue-contacting surface that are configured to create a seal between the outer tissue-contacting surface and tissue.
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