New antireflux plastic stent for patients with distal malignant biliary obstruction

Figure 1 The new antireflux plastic biliary stent. A: The newly designed antireflux plastic stent with a “duckbilled” valve attached to the duodenal end of the stent; B: The valve remains open and allows the antegrade flow of bile; C: The valve closes as the intestinal pressure increases, preventing the reflux of the duodenal contents.

Figure 2 Flowchart of patients involved in the trial. ARPS: Antireflux plastic stent; TPS: Traditional plastic stent.

Figure 3 Kaplan-Meier curve comparing the cumulative patency of stent between the antireflux plastic stent group and the traditional plastic stent group (P = 0. 005, log-rank test). ARPS: Antireflux plastic stent; TPS: Traditional plastic stent.

Figure 4 Kaplan-Meier curve comparing the cumulative survival of patients between the antireflux plastic stent group and the traditional plastic stent group (P = 0. 900, log-rank test). ARPS: Antireflux plastic stent; TPS: Traditional plastic stent.