Retrospective Study
Copyright ©The Author(s) 2018.
World J Gastrointest Endosc. Jan 16, 2018; 10(1): 45-50
Published online Jan 16, 2018. doi: 10.4253/wjge.v10.i1.45
Table 1 Characteristics of patients who underwent regular stent exchange, n (%)
Group A (n = 35)Group B (n = 35)P value
Stent-exchange schedule6 mo12 mo
Age, yr82.9 (77-87)84.4 (76-89)NS
Sex, male/female15/2016/19NS
Periampullary diverticulum7 (20.0)8 (22.9)NS
Sphincterotomy30 (85.7)29 (82.9)NS
Post-ERCP pancreatitis1 (2.9)1 (2.9)NS
Reason for endoscopic stone removal failure
No. of stones16 (45.7)14 (40.0)NS
Size of stones17 (48.6)18 (51.4)NS
Anatomical difficulty2 (5.7)3 (8.6)NS
Follow-up periods, mo27.3 (12-40)26.5 (14-37)NS
Table 2 Stent patency of patients who underwent regular stent exchange, n (%)
Group A (n = 35)Group B (n = 35)P value
Stent-exchange schedule6 mo12 mo
Stent patency at scheduled time32 (91.4)31 (88.6)NS
Stent exchange prior to schedule3 (8.6)4 (11.4)NS
Details of stent troubles
Stent occlusion1 (2.9)3 (8.6)< 0.05
Stent migration2 (5.7)1 (2.9)NS
Acute cholangitis1 (2.9)3 (8.6)< 0.05
Biliary-related mortality00NA
Table 3 Characteristics of patients who underwent stent exchange on demand, n (%)
Group C (n = 17)
Age, yr84.1 (76-90)
Sex, male/female6/11
Periampullary diverticulum4 (23.5)
Sphincterotomy14 (82.3)
Post-ERCP pancreatitis0
Reasons for endoscopic stone removal failure
No. of stones9 (52.9)
Size of stones6 (35.3)
Anatomical difficulty2 (11.8)
Reasons for rejecting scheduled stent exchange
Cardiovascular diseases4 (23.5)
Stroke sequelae4 (23.5)
Age factors3 (17.6)
Dementia3 (17.6)
Malignancy3 (17.6)
Follow-up periods, mo24.8 (14-32)
Table 4 Stent patency of patients who underwent stent exchange on demand, n (%)
Group C (n = 17)
Stent-exchange cases12 (70.6)
Indication for stent exchange
Acute cholangitis6 (35.3)
Obstructive jaundice4 (23.5)
Liver dysfunction2 (11.8)
Details of stent troubles
Stent occlusion10 (58.8)
Stent migration2 (11.8)
Duration of stent patency16.3 (12.7-21.2)
Biliary-related mortality0