„Stone splinter“ like phasic contraction abnormality of the human sphincter of ODDI (SO) – a preliminary report of two cases documented by endoscopic so manometry

Introduction: Currently elevated SO basal pressure is the only accepted manometric abnormality in patients with postcholecystectomy pain and SO dysfunction (SOD) that necessitates therapeutic measures such as endoscopic sphincterotomy (EST). Although normal ranges of SO phasic contractions (PCs) are well described in healthy volunteers, no specific PC abnormalities were characterized in SOD patients. Patients and methods: We retrospectively analyzed our endoscopic SO manometric (ESOM) database of 57 separate manometric recordings of 52 patients. PC activity of the SO could be sufficiently analyzed on 41 ESOM rec…