Surgical sleeve and trocar

A surgical sleeve for the introduction of surgical instruments into a body cavity, the surgical sleeve comprising:

• a housing having an opening through which surgical instruments are introduced into the sleeve;
• a sleeve portion extending from the housing, the sleeve portion including an outer sleeve and an inner sleeve concentrically disposed in the outer sleeve;
• an expandable member carried by the sleeve portion to selectively radially expand to resist withdrawal of the sleeve from the body cavity;
• and
• a reducer assembly including:
• a rigid slider plate slidably and removeably coupled to the housing by a pair of grooves carried by the housing;
• a resilient, laminar seal layer generally coextensive with the slider plate and disposed between the slider plate and the housing and sealingly engaging a portion of the housing;
• and
• a plurality of apertures formed in the slider plate and the seal layer, the apertures having varying diameters and defining seals that are selectively movable over the opening in the housing to seal against exteriors of instruments disposed in the sleeve.

A surgical sleeve for the introduction of surgical instruments into a body cavity, the surgical sleeve comprising:

• a housing having an opening through which surgical instruments are introduced into the sleeve;
• a sleeve portion extending from the housing;
• and
• a reducer assembly including:
• a slider plate slidably and removeably coupled to the housing;
• a resilient seal layer disposed between the slider plate and the housing and sealingly engaging a portion of the housing;
• a plurality of apertures formed in the slider plate and the seal layer, the apertures having varying diameters and defining seals that are selectively movable over the opening in the housing to seal against exteriors of instruments disposed in the sleeve;
• and
• at least one detent disposed between the housing and the slider plate to releasably secure the slider plate in a position in which one of the apertures is disposed over the opening in the housing.