| http://www.w3.org/ns/prov#value | - A cannula for insertion through an anatomical cavity wall to establish communication with the anatomical cavity includes an elongate tubular body having a distal end adapted to be disposed within the anatomical cavity and a proximal end adapted to be disposed externally of the anatomical cavity, a seal including a seal member disposed along the tubular body of the cannula, and a tubular pusher dis
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