| 摘要 |
A cannula (12), has an end region (15) of sufficient dimensions as to be located, in use, in an aperture (16) of body tissue to channel fluid through the aperture and adapted so that an operator applying appropriate tension on one or more threads woven in the tissue can draw the tissue around the aperture to control any fluid escape between the cannula and the body; characterised by the provision of one or more members (21, 22) adjacent the said end region of the cannula which are carried by or form part of the cannula adapted to hold the or each thread in tension once the operator is satisfied that the engagement of the cannula end region with the tissue defining the aperture is appropriate. |
