Georg Thieme Verlag KG Stuttgart · New York
New Design Double Bare or Double Covered Stents for Malignant Colorectal Obstruction:
comparative, prospective, randomized, single-center trial
A Vodoleev, V Duvanskiy, D Kryazhev
When it comes to placement of colorectal stents, reoccurrence of obscuration has been concerned. Even though covered colorectal stents are effective not only to prevent tumor ingrowth but also to seal fistulas, it has a higher risk of migration compared to uncovered stents. On the other hand, uncovered stents have anchoring power against migration but the duration of patency is shorter than covered stents. Clinical failure after successful colorectal SEMS placement is mainly caused by stent occlusion (16%), stent migration (uncovered SEMSs, 3%~12%; covered SEMSs, 30~50%) and perforation of the tumor and/or normal colonic wall. (Repici A, de Paula Pessoa Ferreira D. Expandable metal stents for malignant colorectal strictures. Gastrointest Endos Clin N Am 2011;21:511-33)
The following case study shows good clinical results (clinical success rate: 97%, re-obstruction was rare) in both groups; EGIS covered & uncovered colorectal stents.