| 摘要 |
<p>A surgical access apparatus includes an access member (100) dimensioned for positioning within body tissue. The access member includes an outer wall (112) defining a longitudinal opening (114) along a longitudinal axis (j) of the access member. The outer wall includes at least one locking element (116) projecting radially outwardly from the outer wall. The at least one locking element defines first (118), second (120) and third (122) surfaces. The first surface is a leading surface and is arranged at a leading angle relative to the longitudinal axis to permit insertion of the access member in the body tissue. The second surface extends from the first surface. The third surface extends from the second surface and is a trailing surface arranged at a trailing angle relative to the longitudinal axis to resist removal of the access member from the body tissue. Preferably, the outer wall of the access member is transparent. The outer wall may include a plurality of locking elements. Adjacent locking elements may be longitudinally spaced relative to the longitudinal axis.</p> |
