title: The utility and yield of endoscopic ultrasonography for suspected choledocholithiasis in common gastroenterology practice.
abstract: OBJECTIVE
  Endoscopic ultrasonography (EUS) is an established diagnostic modality for diagnosing common bile duct (CBD) stones. Its use has led to a reduction in the number of endoscopic retrograde cholangiopancreatography (ERCP) procedures performed for suspected choledocholithiasis. We aimed to explore the role of EUS in detecting CBD stones and/or sludge in common gastroenterology practice.
  
  
  METHODS
  We reviewed case records of 268 consecutive patients who underwent (EUS) procedures performed to confirm or rule out the presence of CBD stones and/or sludge between November 2006 and January 2011 in the Reinier de Graaf Hospital, Delft, The Netherlands, which is a nonacademic community hospital.
  
  
  RESULTS
  On the basis of EUS findings, 169 of 268 (63%) patients did not undergo ERCP and were therefore not exposed to its risk of complications. Patients with positive findings on EUS (n=99) all underwent ERCP and endoscopic sphincterotomy. Only 57 of 99 (58%) had positive findings at ERCP. The main contributing factors to this finding seem to be time interval between EUS and ERCP and the type of CBD content (i.e. sludge, one CBD stone or more than one CBD stone) described.
  
  
  CONCLUSIONS
  In our common gastroenterology practice, EUS plays an important role in selecting patients suspected to have CBD stones or sludge for ERCP. Much is to be learned about the probability of spontaneous passage of CBD stones and sludge into the duodenum.
authors.affiliation: Departments of aGastroenterology bBiostatistics, Reinier de Graaf Gasthuis, Delft cDepartment of Gastroenterology, Erasmus Medical Center, Rotterdam, The Netherlands.
authors.forename: Rutger
authors.initials: R
authors.lastname: Quispel
authors.forename: Lydi M W J
authors.initials: LM
authors.lastname: van Driel
authors.forename: Bart J
authors.initials: BJ
authors.lastname: Veldt
authors.forename: Paul M M
authors.initials: PM
authors.lastname: van Haard
authors.forename: Marco J
authors.initials: MJ
authors.lastname: Bruno
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002760:Cholangiopancreatography, Endoscopic Retrograde; D042883:Choledocholithiasis / Q000000981:diagnostic imaging* / Q000601:surgery; D003135:Common Bile Duct / Q000000981:diagnostic imaging*; D019160:Endosonography; D005260:Female; D005762:Gastroenterology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D016717:Sphincterotomy, Endoscopic; D055815:Young Adult