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Surgery
A 70-year-old male underwent a choledochoduodenostomy for multiple common duct stones. The patient now presents with RUQ abdominal pain. What should be the initial test (least invasive with the best yield) to determine patency of the choledochoduodenostomy?
ERCP
Percutaneous transhepatic cholangiogram (PTC)
HIDA scan
CT scan of the abdomen
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