operative cholangiography /op″ərətiv′/ [L, operare + Gk, chole, bile, angeion, vessel, graphein, to record] , a procedure for radiographically outlining the major bile ducts during surgery. It involves the injection of a radiopaque contrast medium directly into the ducts. The procedure is usually performed to detect residual calculi in the biliary tract. See also cholangiography.
