Figure 3From: Threaded biliary inside stents are a safe and effective therapeutic option in cases of malignant hilar obstruction Cumulative patency durations of the plastic stents (PS) and the threaded inside plastic stents (Threaded PS). Kaplan–Meier estimation of the cumulative durations of stent patency in the conventional PS (solid line; median duration, 32 days) and threaded PS groups (dotted line; median duration, 142 days).Back to article page