Korean J Gastrointest Endosc > Volume 27(2); 2003 > Article
Korean Journal of Gastrointestinal Endoscopy 2003;27(2): 64-69.
악성 담도 협착에서 막부착형 금속 배액관과 플라스틱 배액관의 효과 비교
영남대학교 의과대학 내과학교실
A Comparative Study on the Efficacy of Covered Metal Stent and Plastic Stent in Malignant Biliary Obstruction
Jun Hwan Kim, M.D., Byung Ik Jang, M.D., Tae Nyeun Kim, M.D. and Moon Kwan Chung, M.D.
Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea

Insertion of self-expanding metallic stents (SEMS) has become an established option for the palliation of malignant biliary obstruction (MBO). However, stent occlusion by tumor ingrowth is still an unsolved problem. To overcome this problem, membrane-covered SEMSs have been developed. The purpose of this study was to compare the effectiveness of membrane-covered SEMS versus plastic stent in the treatment of MBO.
Between Jan 2001 and Jul 2002, 57 patients with unresectable MBO who initially had plastic stents inserted were randomized to receive either plastic stent and membrane-covered SEMSs after initial plastic stent failure.
Placement of either plastic stents or membrane- covered SEMs was successful in all patients. Mean patency duration of stents were significantly longer in membrane- covered SEMS group (189 days) than in plastic stent group (82 days) (p=0.01). The causes of stent failure were occlusion in 10 cases and migration in 1 case in membrane- covered SEMS group. Of these occluded 10 cases, tumor ingrowth was noted in 7, tumor overgrowth in 2, and biliary incrustation in 1.
Membrane-covered SEMS has a longer patency than plastic stent. However, new membrane covering material is needed to prevent tumor ingrowth more effectively. (Korean J Gastrointest Endosc 2003;27:64⁣69)
Key Words: Malignant biliary obstruction, Membrane covered metal stent
주요어: 악성 담도협착, 막부착형 금속 배액관
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