Endoscopic papillary balloon dilatation may preserve sphincter of Oddi function after common bile duct stone management: evaluation from the viewpoint of endoscopic manometry

摘要

Background—Endoscopic papillary balloondilatation (EPBD) has been reported as a safe and effective alternativeto endoscopic sphincterotomy in the management of common bile duct(CBD) stones; its effect on papillary function has yet to be elucidated. 
Aim—To investigate sphincter of Oddi (SO)motility before and after EPBD to determine its effect on SO function. 
Patients and methods—The papillary function of 10 patients with CBD stones was studied using endoscopic manometry beforeand one week after EPBD. The manometric studies were repeated one monthafter EPBD in seven patients. 
Results—One week after EPBD, CBD pressure, SO peakpressure, SO basal pressure, and SO frequency decreased significantly. One month after EPBD, however, all parameters increased although theincreases in SO basal pressure and CBD pressure were not significant. There was no significant difference in values of any parameter beforeand one month after EPBD. No serious complications occurred. 
Conclusion—These data suggest at least partialrecovery of papillary function one month after the procedure. EPBDseems to preserve papillary function in treatment of CBD stones; alonger term follow up study with SO manometry should be performed to clarify the effect of EPBD on SO function.