| http://www.w3.org/ns/prov#value | - In another alternative embodiment, illustrated by articulating cannula 700B in FIG. 7B, the endoscopic cannula is constructed of a flexible material, such as flexible plastic (polyethylene, polyurethane, polytetrafluoroethylene, etc.) and its tip 708 is articulable, for example by a wire 720 running through a separate wire lumen 724 and attached to the distal end of the device, as shown in FIGS. 7
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