| http://www.w3.org/ns/prov#value | - A cannula system, comprising:a reusable cannula which has a first end but includes neither a fluid seal nor an instrument seal; and a disposable seal assembly, wherein the disposable seal assembly comprises:a body through which a channel extends, said body including a flange removably attached to the first end of the cannula, wherein the channel has a first radius at a first end of the body; a fle
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