| http://www.w3.org/ns/prov#value | - Preferably, the cannula assembly includes at least one instrument sealing arrangement (e.g., comprising at least one of a gasket, seal, and valve such as a duckbill valve), that can be pliable, adapted to contact the instrument(s) used during the procedure and reduce or minimize the leakage of gas from the inflated body cavity.
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