| 摘要 |
An expandable endoscopic portal (10) for providing a passage through a body cavity wall includes a cannula (12) comprising an absorbent member (20) having a distal end (24) for positioning in the body cavity, a proximal end (26) for positioning external of the body cavity and a passage (69) between the distal and proximal ends for receiving instruments. The absorbent member (20) has a compressed dry state prior to introduction through the cavity wall and an expanded wet state when supplied with fluid upon introduction of the distal end (24) in the body cavity. A method of establishing a passage through a cavity wall includes introducing an elongate absorbent member (20) in an opening in the cavity wall with the absorbent member (20) in a dry state such that the absorbent member (20) extends longitudinally through the cavity wall and hydrating the absorbent member (20) to place the absorbent member (20) in a wet state to cause the absorbent member (20) to expand radially within the opening. |
