PURPOSE: To evaluate the effectiveness of partially covered metallic Wallstents to prevent @entity5 in @entity1 with @entity5 of the biliary tract. METHODS: Twenty-one @entity1 with @entity3883 have been treated with Wallstents partially covered with a @entity2636 polymer. In total, 36 covered stents (8 and 10 mm in diameter, 70 and 90 mm long) were deployed. All the stents were free from covering at both ends. RESULTS: @entity1087 was successfully treated in 100% of cases. There were no problems related to the releasing system during stent positioning, no major complications, and no incompatibility reactions to the materials composing the endoprostheses. At 23-month follow-up, 6 @entity1 are still alive and 15 are dead; of these 15 @entity1 , 11 died in the first 6 months and the last 4 died between 6 and 23 months. Seven @entity1 had an obstructed stent; in four of these, cholangioscopy showed the presence of @entity5 and in one it showed necrotic tissue with biliary pigments and inflammatory cells. No biopsy specimen was obtained in the remaining two @entity1 with stent obstruction. The follow-up, ranging from 7 to 23 months, showed a primary patency of 46.8% and 24.6% and an assisted patency of 66.3% and 59% at 6 months and 23 months, respectively. CONCLUSIONS: Covered metallic stents are effective and may produce improved survival in @entity1 with @entity5 (27. 8% at 23 months). Stent patency, however, is similar to that of uncovered stents. Modifications in the design of the covering membrane may reduce stent obstruction resulting from disruption of the plastic covering.

Clinical experience with covered wallstents for XXXX : 23-month follow-Up.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity3883 :: ('MESH:D041781', 'Disease') :: ['malignant obstructive jaundice'] @entity1087 :: ('MESH:D007565', 'Disease') :: ['Jaundice'] @entity5 :: ('MESH:D009369', 'Disease') :: ['neoplastic obstruction', 'malignant biliary obstruction', 'tumoral ingrowth'] @entity2636 :: ('MESH:D011140', 'Chemical') :: ['polyurethane']
@entity5 :: (MESH:D009369,Disease) :: ['biliary malignancies']
