Diagnostic and therapeutic direct peroral cholangioscopy using an intraductal anchoring balloon

Figure 1 Ex vivo and in vivo views of the anchoring balloon. A: Overall view of the anchoring balloon; B: Fluoroscopic view of an inflated anchoring balloon that has been passed over a guidewire and anchored in one of the intrahepatic bile ducts; C: Fluoroscopic view of an ultraslim upper endoscope that has been backloaded over the catheter of an inflated anchoring balloon and advanced into the bile duct to the level of the confluence of the right and left hepatic ducts.