A Prospective Randomized Study for Efficacy of Uncovered Double Bare Metallic Stent Compared to Uncovered Single Bare Metallic Stent in Malignant Biliary Obstruction

The patients who had malignant biliary obstruction will be enrolled our study. Enrolled patient will be randomized to three group (uncovered double bare metallic stent (S\&G Biotech.) vs. uncovered single bare metallic stent (S\&G Biotech.) vs. uncovered single bare metallic stent (Taewoong Medical.)). After metallic biliary stent insertion, enrolled patients will be followed at least one time per one month. Blood test (including total bilirubin, gamma-GT) will be done for follow-up study. During follow-up period, if biliary obstruction is suspected, imaging study (CT or MRCP) will be done. With such follow-up tools, we compare 6-month patency rate and median patency duration among three groups.

The patients who had malignant biliary obstruction will be enrolled our study. Enrolled patient will be randomized to three group (uncovered double bare metallic stent (S\&G Biotech.) vs. uncovered single bare metallic stent (S\&G Biotech.) vs. uncovered single bare metallic stent (Taewoong Medical.)). After metallic biliary stent insertion, enrolled patients will be followed at least one time per one month. Blood test (including total bilirubin, gamma-GT) will be done for follow-up study. During follow-up period, if biliary obstruction is suspected, imaging study (CT or MRCP) will be done. With such follow-up tools, we compare 6-month patency rate and median patency duration among three groups.

The patients who had malignant biliary obstruction will be enrolled our study. Enrolled patient will be randomized to three group (uncovered double bare metallic stent (S\&G Biotech.) vs. uncovered single bare metallic stent (S\&G Biotech.) vs. uncovered single bare metallic stent (Taewoong Medical.)). After metallic biliary stent insertion, enrolled patients will be followed at least one time per one month. Blood test (including total bilirubin, gamma-GT) will be done for follow-up study. During follow-up period, if biliary obstruction is suspected, imaging study (CT or MRCP) will be done. With such follow-up tools, we compare 6-month patency rate and median patency duration among three groups.