Gastroenterology Research and Practice

Research Article

The Usefulness of the Alpha-Retroflex Position in Biliary Cannulation on Single-Balloon Enteroscopy-Assisted Endoscopic Retrograde Cholangiopancreatography in Patients with Roux-en-Y Gastrectomy: A Retrospective Study

Table 2

Outcomes of a biliary cannulation strategy with three types of scope position.
Success rate of reaching the papilla, (n/N)%100 (52/52)
Successful biliary cannulation rate, (n/N)%96.2 (50/52)
Procedure success rate, (n/N)%100 (50/50)
Scope position and cannulation method, n(%)
 S-position24 (48%)
  Standard method (Step 1)18
  Rescue method (Step 5)6
 J-position14 (28%)
  Standard/rescue method (Step 2)11/1
  J-position from A-position with standard method (Step 4)2
 A-position12 (24%)
  Standard/rescue method (Step 3)11/1
Endoscopic procedures
 EST + stone extraction1
 EPBD + stone extraction14
 EBD32
 Cholangiography3
Adverse event
 Post-ERCP pancreatitis0
 Others0
A-position, alpha-retroflex position; EBD, endoscopic biliary drainage; EPBD, endoscopic papillary balloon dilation; ERCP, endoscopic retrograde cholangiopancreatography; EST, endoscopic sphincterotomy; J-position, J-retroflex position; S-position, straight position.