The sphincter of Oddi is a circular band of muscle which controls the flow of pancreatic juices and bile into the small intestine. Abnormal function of the Sphincter of Oddi, known as Sphincter of Oddi dysfunction (SOD), can lead to recurrent episodes of abdominal pain. Making a diagnosis of SOD is difficult and is currently achieved using an invasive pressure test. This pressure test is associated with some adverse effects including inflammation of the pancreas gland. We are investigating an alternative test in which medication is given to provoke spasm of the sphincter. Following provocation, blood can be sampled to detect changes in blood composition and changes in sphincter anatomy can be evaluated using specialized imaging techniques. Our aim is to study and compare the effects of two provocation medications (morphine-prostigmine and secretin) on biliary and pancreatic ductal anatomy, using dynamic serial MRCP in healthy volunteers. Our hypothesis is that morphine-neostigmine provocation results in greater changes in biliary and pancreatic ductal anatomy when assessed using dynamic serial MRCP.
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Serum amylase (U/L)
Timeframe: 0, 60, 120, 180 and 240 minutes
Serum lipase (U/L)
Timeframe: 0, 60, 120, 180 and 240 minutes
Liver function tests
Timeframe: 0, 60, 120, 180 and 240 minutes