ENDOSCOPIC PAPILLARY BALLOON DILATATION MAY PRESERVE SPHINCTER OF ODDI FUNCTION AFTER COMMON BILE-DUCT STONE MANAGEMENT - EVALUATION FROM THE VIEWPOINT OF ENDOSCOPIC MANOMETRY

Background-Endoscopic papillary balloon dilatation (EPBD) has been rep orted as a safe and effective alternative to endoscopic sphincterotomy in the management of common bile duct (CBD) stones; its effect on pap illary function has yet to be elucidated. Aim-To investigate sphincter of Oddi (SO) motility before and after EPBD to determine its effect o n SO function. Patients and methods-The papillary function of 10 patie nts with CBD stones was studied using endoscopic manometry before and one week after EPBD. The manometric studies were repeated one month af ter EPBD in seven patients. Results-One week after EPBD, CBD pressure, SO peak pressure, SO basal pressure, and SO frequency decreased signi ficantly. One month after EPBD, however, all parameters increased alth ough the increases in SO basal pressure and CBD pressure were not sign ificant. There was no significant difference in values of any paramete r before and one month after EPBD. No serious complications occurred. Conclusion-These data suggest at least partial recovery of papillary f unction one month after the procedure. EPBD seems to preserve papillar y function in treatment of CBD stones; a longer term follow up study w ith SO manometry should be performed to clarify the effect of EPBD on SO function.