| 摘要 |
An instrument access device ( 1 ) comprises an instrument seal, a wound retractor for retracting a wound opening ( 2 ), and an opening element for at least partially opening the seal to facilitate insertion of an instrument ( 6 ) through the seal. The instrument seal comprises a gelatinous elastomeric seal ( 3 ) with a pinhole opening ( 4 ) extending therethrough, and a housing ( 5 ) around the seal ( 3 ). The opening element may be employed to at least partially open the pinhole opening ( 4 ) to facilitate insertion of the instrument ( 6 ) through the pinhole opening ( 4 ). The opening element comprises a sheet ( 11 ) of flexible material. The sheet ( 11 ) is movable distally relative to the seal ( 3 ) between a rest configuration and an opening configuration. In the rest configuration the sheet ( 11 ) is substantially planar. In the opening configuration, the pointed, the leading end ( 16 ) of the sheet ( 11 ) enters the pinhole opening ( 4 ) and moves distally through the pinhole opening ( 4 ) to at least partially open the pinhole opening ( 4 ).
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