Among the methods recommended to aid in the decision of whether or not to open the common bile duct is the operative cholangiogram. An increasing number of surgeons have adopted operative cholangiography as a routine in all cholecystectomies. In the past several years since we have been performing operative cholangiography, using the cystic duct, we have felt that it has obviated the necessity of opening many common ducts as well as induced us to open others that would not otherwise have been explored. If the procedure accomplished nothing other than to relieve the surgeon of the necessity for further search for calculi after he has recovered enough to explain all defects visualized on the x-ray film, it would be well worth the time spent in performing the study.
Of the various techniques advocated for the performance of the cholangiogram, we do not care for the direct puncture of the common