Fig. 5
From: Evaluation of valve function in antireflux biliary metal stents
Morphologic changes of antireflux. a The wine glass-shaped antireflux valve is deformed, creating small holes (arrow) in the part connected to the stent body. b Compared to the wine glass-shaped antireflux valves used in the bile flow phantom model on the left, the antireflux valves used in the duodenal pH model on the right became relatively thicker, shorter, or deformed. c Windsock-type antireflux valve shape deformed due to the skirt clinging to itself. d funnel type antireflux valve shape deformed due to the skirt clinging to itself