| http://www.w3.org/ns/prov#value | - The head assembly may include a flexible seal which permits the passage of the obturator with little or no fluid leakage, for example, little or no leakage of treatment or bodily liquids or gases. [0015] An even further aspect of the present invention is a method of using a trocar, the trocar comprising an obturator having a tip and a cannula having a flexible open end, the method of including: in
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