Patency and Safety of the Drug Eluting Covered Biliary Stent Comparing to the Common Covered Biliary Stent

Clinical Trial Comparing Patency and Safety of the Paclitaxel Eluting Covered Metallic Biliary Stent(Niti-S Mira-Cover Biliary Stent ) to the Common Covered Metallic Biliary Stent(Niti-S Biliary Stent)

Paclitaxel covered metal biliary stent extents their patency rate comparing to the Common Covered Metallic Biliary Stent.

Paclitaxel covered metal biliary stent(Mira-Cover Biliary Stent) extents their patency rate comparing to the Common Covered Metallic Biliary Stent(Niti-S Biliary Stent.

Inclusion Criteria:

• Patient who is inoperable and/or unresectable cases of pancreatic cancer and/or biliary cancer with mid or distal CBD invasion
• Among patient of a.,Patient who previously had surgical biliary drainage of plastic stent have eligibility

Exclusion Criteria:

• Patient who have life expectancy under 3 months
• Patient who have severe metastasis of Liver or whole body
• Patient who previously had surgical biliary drainage