Fig. 3
From: Clinical value of DPOC for detecting and removing residual common bile duct stones (video)
Residual stones were detected by DPOC after mechanical lithotripsy. a well-conditioned duodenal papilla; b 1.8 × 2.5 cm filling defect detected by choledochography; c removal of broken stones after EST plus EPBD and mechanical lithotripsy; d no cholangiographic filling defect were found after balloon cleaning; e:more common bile duct residual stones were found and clean up by DPOC