Table 1.

Characteristics of patients in 416 ERCP procedures

	All (n = 416)	Group A (n = 293)	Group B (n = 123)
Age (yr) (mean)	60. 6	61.2	59.5
Gender: Male	214	153	61
Female	202	140	62
Procedure: Elective	399	278	121
Emergency	17	15	2
Anesthesia: TIVA	410	287	123
GA	3	3	0
Indications (%)
Cholelithiasis	203 (48.8)	140 (47. 8)	62 (50.4)
Biliary stricture
Malignant	150 (36.1)	99 (33.8)	52 (42.3)
Benign	22 (5.3)	21 (7.2)	3 (2.4)
GS pancreatitis	4 (1.0)	4 (1.4)	1 (0.8)
Bile leakage	3 (0.7)	3 (1.0)	2 (1.6)
SOD	2 (0.5)	2 (0.7)	0
Miscellaneous	32 (7.7)	24 (8.2)	3 (2.4)
Factors effect to cannulation
Juxtaduodenal diverticulum
Previous operation	66	46 (15.7)	20 (16.3)
HPB surgery	73	47 (16.0)	26 (21.1)
Billroth II gastrectomy	4	3 (1.0)	1 (0.8)

TIVA: Transintravenous anesthesia; GA: General anesthesia; SOD: Sphincter of Oddi dysfunction.