| 摘要 |
A surgical portal apparatus for permitting introduction of a surgical obje ct within tissue includes a portal member defining a longitudinal axis and havi ng leading and trailing ends. The portal member includes an outer wall defining a longitudinal opening dimensioned for reception of a surgical object. At least one projection is disposed on the outer wall of the portal member and extends in at least a radial direction relative to the longitudinal axis. The at least one projection is dimensione d and configured for engaging.tissue to resist movement of the portal member withi n tissue. The at least one projection defines a recess dimensioned for receiving tissu e portions adjacent thereto. Preferably, a plurality of projections is spaced about the outer wall of the portal member. At least two of the projections are circumferentially spaced relative to the longitudinal axis and/or at least two of the projections are longitudinally spaced relative to the longitudinal axis.
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