Sphincter patency and hepatic BSP uptake after biliary sphincterotomy

Area of Science:

• Gastroenterology
• Hepatobiliary Surgery
• Clinical Physiology

Background:

• Biliary sphincterotomy is a common procedure for treating bile duct conditions.
• Assessing the long-term patency and function of the choledochoduodenal junction post-sphincterotomy is crucial.
• Previous studies indicate potential long-term abnormalities after bile duct surgery.

Purpose of the Study:

• To evaluate the patency and function of the choledochoduodenal junction after biliary sphincterotomy.
• To determine the effect of morphine on biliary-duodenal transit time post-sphincterotomy.
• To investigate the incidence of delayed stenosis and abnormal bromosulphalein (BSP) retention after the procedure.

Main Methods:

• Bromosulphalein (BSP) first arrival time in duodenal aspirate was measured in 49 patients 1-12 years post-sphincterotomy.
• The effect of morphine on BSP arrival time was assessed.
• Plasma BSP levels were analyzed to evaluate retention.

Main Results:

• 47 out of 49 patients showed normal BSP arrival times, suggesting preserved function in most cases.
• 2 patients (4%) exhibited delayed arrival times, indicating potential late-onset stenosis.
• Morphine prolonged duodenal BSP arrival time in controls and post-sphincterotomy patients, but not in T-tube bile.
• Abnormal plasma BSP retention was observed in 14 of 49 patients, correlating with pre-existing conditions.

Conclusions:

• Biliary sphincterotomy appears to maintain choledochoduodenal junction patency and function in the majority of patients.
• Late-onset stenosis is a rare complication, not typically detected by standard clinical or radiological methods.
• The sphincter region's protective mechanisms may remain largely intact after this type of sphincterotomy.
• Abnormal BSP retention likely reflects the underlying pathology rather than the surgical intervention itself.