| Abstract: | Background: A new plastic stent was designed for endoscopic biliary stenting to achieve a long and effective drainage period. Method: The Double layer stent is composed of Teflon as the inner layer and nylon as the outer layer divided with metallic mesh. This structure gives the stent several side‐flaps without side‐holes. Double layer stents were applied in 24 patients with inoperable malignant biliary obstruction. Results: The Double layer stents were successfully placed in all cases, and the effective drainage rate of these stents was 96%. The mean patency period evaluated by the Kaplan–Meier method without ineffective cases was 207 days, which was longer than the ordinary plastic stent of the same diameter. Concerning the complications related to inserting, we experienced dislocation was experienced in three patients. Conclusions: The authors regard this new device as an useful stent, which users can expect long patency period, easy exchange management, and reduced cost for the patients with inoperable obstruction in the biliary tract. |
