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![Trocar [#20M]](/cartgenie/Images/Medium/20m.jpg "Trocar [#20M]")
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The term "trocar" was apparently first used in 1706 as a proper British corruption of the French "trois-quarts", a three-faceted instrument consisting of a perforator in a tube, or cannula, used for withdrawing fluid from a bodily cavity. By the end of the century, most cannulae had a circular shield at the handle end and a prismatic point. Mostly used in dropsy, or hydrocele, applications also were illustrated for draining ovarian cysts and the nasal cavity.
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