The<unk> , also known as the morphine-neostigmine provocation test is a test for dysfunction of the sphincter of Oddi, a valve which divides the biliary tract from the duodenum. Two medications, morphine and neostigmine, are given to people with symptoms concerning for sphincter dysfunction, including sharp right-sided abdominal pain. If the pain is reproduced by the medications, then dysfunction is more likely. The test poorly predicts dysfunction, however, and is rarely used today. The<unk>  was named for George<unk> , who first described the procedure in 1966.
Nardi test
Elek's test
Cozen's test
Beutler test
Conconi test
Ames test
Vinegar test
Monoyer chart