Passive-bending, short-type single-balloon enteroscope for endoscopic retrograde cholangiopancreatography in Roux-en-Y anastomosis patients

Table 1 Baseline characteristics of the patients n (% of procedures)

Characteristic	SIF-Y0004-V01 (n = 50)	SIF-Y0004 (n = 34)	P value	All SBE-assisted ERCP (n = 84)
Reconstruction method
Roux-en-Y gastrectomy	34 (68)	29 (85)	0.124	63 (75)
Roux-en-Y hepaticojejunostomy	16 (32)	5 (17)		21 (25)
Age, (yr) (mean ± SD)	71.4 ± 9.2	70.0 ± 11.0	0.529	70.8 ± 9.9
Sex
Male	40 (80)	31 (91)	0.168	71 (85)
Female	10 (20)	3 (9)		13 (15)
Reasons for surgery
Gastric ulcer	0 (0)	1 (3)	0.218	1 (1)
Duodenum ulcer	0 (0)	2 (6)	0.080	2 (2)
Carcinoma of the stomach	32 (64)	25 (73)	0.387	57 (68)
Malignant lymphoma of the stomach	2 (4)	0 (0)	0.238	2 (2)
Carcinoma of the duodenum	1 (2)	0 (0)	0.407	1 (1)
Tumors of the pancreas
Carcinoma of the pancreas	3 (6)	0 (0)	0.146	3 (4)
SCN	1 (2)	0 (0)	0.407	1 (1)
NET	1 (2)	0 (0)	0.407	1 (1)
Tumors of the biliary tract
Carcinoma of the bile duct	4 (8)	0 (0)	0.091	4 (5)
IPNB	2 (4)	3 (9)	0.345	5 (6)
Pancreaticobiliary maljunction	2 (4)	1 (3)	0.809	3 (4)
Congenital choledochal cyst	0 (0)	1 (3)	0.218	1 (1)
Other	2 (4)	1 (3)	0.809	3 (4)
Reasons for ERCP
AOSC (due to CBD stone)	0 (0)	2 (6)	0.080	2 (2)
Pancreatitis (due to CBD stone)	1 (2)	0 (0)	0.407	1 (1)
CBD stone	26 (52)	21 (62)	0.365	47 (56)
Intrahepatic stone	10 (20)	3 (9)	0.172	13 (16)
Carcinoma of the pancreas	2 (4)	1 (3)	0.809	3 (4)
Carcinoma of the gallbladder	1 (2)	0 (0)	0.407	1 (1)
Cholangiocellular carcinoma	3 (6)	0 (0)	0.146	3 (4)
IPMN	0 (0)	2 (6)	0.080	2 (2)
IPNB	2 (4)	4 (12)	0.165	6 (7)
Pancreaticobiliary maljunction	1 (2)	0 (0)	0.407	1 (1)
Metastasis of L/n in porta hepatis	0 (0)	5 (15)	0.005	5 (6)
Stricture of the anastomotic site	4 (8)	0 (0)	0.091	4 (5)
Other	1 (2)	1 (3)	0.769	2 (2)
Other abdominal or pelvic surgery	9 (18)	10 (29)	0.236	19 (23)
Peritoneal metastasis	0 (0)	2 (6)	0.080	2 (3)

AOSC: Acute obstructive suppurative cholangitis; ERCP: Endoscopic retrograde cholangiopancreatography; CBD: Common bile duct; IPMN: Intraductal papillary mucinous neoplasm; IPNB: Intraductal papillary neoplasm of the bile duct; NET: Neuroendocrine tumors; SCN: Serous cystic neoplasm.