| http://www.w3.org/ns/prov#value | - Suitable materials for the catheter 12 include an alloy of polyvinyl chloride (PVC) and polyurethane (PU), such as sold under the trade designation Vythene by Dexter Plastics Division of the Dexter Corporation, Pineville, N.C., although other materials, such as silicone or PVC, could also be employed.
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