Effect of sphincteroplasty on gallbladder function and bile composition

Area of Science:

• Gastroenterology and Hepatobiliary Surgery
• Comparative Physiology

Background:

• Sphincteroplasty is a surgical procedure affecting the biliary system.
• Understanding its impact on gallbladder function and bile composition is crucial for patient outcomes.

Purpose of the Study:

• To investigate the effects of sphincteroplasty on bile concentration, composition, and gallbladder function in a canine model.
• To determine if sphincteroplasty alters the lithogenicity of bile and gallbladder pathophysiology.

Main Methods:

• Analysis of gallbladder and hepatic bile for cholesterol, phospholipids (lecithin), and bile salts.
• Assessment of gallbladder motor function using cholecystokinin-cholecystography.
• Histological examination and bacterial culture of gallbladders post-procedure.

Main Results:

• Sphincteroplasty decreased lecithin and bile salt concentrations in gallbladder bile, increasing lithogenicity.
• Changes in bile salt profiles (increased monohydroxy/dihydroxy, decreased trihydroxy) favor gallstone formation.
• Gallbladder concentrating ability was impaired, and chronic inflammation and bacterial flora developed.

Conclusions:

• Sphincteroplasty significantly alters gallbladder pathophysiology, increasing the risk of gallstone formation.
• These changes, rather than motor function abnormalities, necessitate cholecystectomy following transduodenal sphincteroplasty.