Endoscopic approaches to biliary intervention in patients with surgically altered gastroduodenal anatomy

Table 3 Studies that evaluated the efficacy of spiral-enteroscopy-assisted endoscopic retrograde cholangiopancreatography in patients with surgically altered gastroduodenal anatomy

Ref.	Method	Cases (n)	Cases with RY anatomy	Reached ampulla/orifice	Diagnostic ERCP success	Therapeutic ERCP success
Shah et al[3]	Spiral	57	N/A	72%	90%1	90%1
Lennon et al[4]	Spiral	29	29	N/A	40%	87.5%
Wagh et al[47]	Spiral	13	6 of 7 patients	77%	89%	90%

¹Reported success was for both diagnostic and therapeutic procedures. Diagnostic success rates were calculated only for those patients in whom the ampulla/orifice was reached. Therapeutic success rates do not include those patients in whom the ampulla/orifice was not reached and/or diagnostic endoscopic retrograde cholangiopancreatography (ERCP) failed or patients who did not require any therapeutic intervention. RY: Roux-en-Y.