Trocar

Patent Granted A trocar (variant: trochar;[1] from French: via troquard, alteration of trois-quarts from trois (three) + quart (quarter), i.e., 'three-quarters',[2] term first recorded in the Dictionnaire des Arts et des Sciences, 1694,[3] by Thomas Corneille, younger brother of Pierre Corneille) is a medical device that is made up of an obturator (which may be a metal or plastic sharpened or non-bladed tip), a cannula (basically a hollow tube), and a seal. Trocars are placed through the abdomen during laparoscopic surgery.