[Intraoperative sonography of the bile ducts]

The experience with intraoperative ultrasonography (IOUS) during biliary surgery demonstrates positive and negative aspects. An evaluation of the method is possible by two prospective studies from the literature. The IOUS of the bile ducts is not a substitute for intraoperative cholangiography. Imaging of the papilla is possible in 30% only and examination of the drainage into the duodenum is impossible. The predictive value of a positive IOUS test is higher in comparison with cholangiography.