Table 2: Incidence of stent malfunction.

DLS (24)New DLS (23)UMS (17)

Mean patency time74 ± 66160 ± 136*1196 ± 147*3
Stent malfunction1615*27*3
(%)(66.6)(65.2)(41.1)
 Ingrowth004
 Overgrowth210
 Sludge530
 Food scraps241
 Impaction (bile duct)330
 Impaction (duodenal wall)311
 Other131
Complication32*20*3
(%)(12.5)(8.7)(0)
 Cholecystitis200
 Pancreatitis100
 Hemorrhage000
 Migration010
 Other010

DLS versus new DLS: *1 . *2n.s. UMS versus new DLS: 3n.s.