Current status of endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy

Table 1 Success rates of conventional duodenoscope and forward-view endoscope in Billroth II operation

Ref.	Endoscope type	Operation type	Success rate of afferent loop intubation, %	Success rate of cannulation, %	Complication rate, %
Jang et al[44]	Conventional side-view duodenoscope	Billroth II	100	100	0
Bove et al[9]	Conventional side-view duodenoscope	Billroth II	86.7	93.8	2.7
Cicek et al[11]	Conventional side-view duodenoscope	Billroth II	86.4	88.2	10.2
Wu et al[13]	Conventional side-view duodenoscope	Billroth II	90.5	88.6	12.5
Kim and Kim[67]	Conventional side-view duodenoscope	Billroth II	100	100	4
Park et al[68]	Conventional side-view duodenoscope	Billroth II	86.8	92.3	3.6
Wang et al[8]	Conventional side-view duodenoscope	Billroth II	62.5	100	10.3
	Forward-view gastroscope Standard colonoscope	Billroth II	84.6	81.8
		Billroth II	93.5	91.2
	Cap-fitted forward-view gastroscope/ without cap	Billroth II	92.5/88.6	91.1	3
Park et al[38]	Cap-fitted forward-view gastroscope	Billroth II	100	100	10
Lin et al[69]	Forward-view gastroscope	Billroth II	76.8	81.4	0

DBE: Double balloon enteroscope; RYGB: Roux-en-Y gastric bypass.