Mullen J T, Carr R E, Rupnik E J, Knapp R W
Am J Surg. 1976 Jun;131(6):672-5. doi: 10.1016/0002-9610(76)90175-6.
Operative cholangiography and extraductal palpation are both accurate means of demonstrating common duct stones. When used in combination, accuracy was 94.4%. Routine extraductal palpation and selective cholangiography will prevent excessive and fruitless common duct exploration.