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A New Covered Biliary Metal Stent versus Uncovered Wallstent for Malignant Biliary Obstruction / 대한소화기내시경학회지
Korean Journal of Gastrointestinal Endoscopy ; : 93-99, 2001.
Artículo en Coreano | WPRIM | ID: wpr-192841
ABSTRACT
BACKGROUND/

AIMS:

In order to provide a complete obstacle to tumoral growth, we designed a new self-expandible metal stent fully covered with polyurethane membrane. The purpose of the study was to compare the safety and effectiveness of a new membrane-covered Niti-S stent versus conventional uncovered Wallstent.

METHODS:

In a prospective trial, 59 patients with malignant extrahepatic biliary obstruction received either a newly developed covered metal stent (Niti-S stent, 30 cases) or an uncovered metal stent (Wallstent, 29 cases) by the endoscopic transpapillary route.

RESULTS:

Effective biliary decompression was achieved in all patients initially, and short-term results were similar in both groups. Stent failure was observed in 4 of the 30 patients (13%) after a median period of 165 days in the Niti-S group and in 8 of the 29 patients (28%) after a median period of 152 days in the Wallstent group. The reasons of stent failure were occlusion (n=3) and migration (n=1) in the covered Niti-S stent group and occlusion (n=8) in uncovered Wallstent group. According to the Kaplan-Meier life table analysis, the patency rates after 90, 180, and 360 days were 100%, 90%, and 74% in covered Niti-S stent group and 100%, 73%, and 61% in uncovered Wallstent group respectively. The occluded membrane-covered Niti-S stent was easily removed endoscopically and a new Niti-S stent was reinserted in one patient.

CONCLUSIONS:

The new, membrane-covered Niti-S stent has a lower stent failure rate and a tendency toward long-term patency rate compared to uncovered Wallstent. The covering may effectively prevent tumor ingrowth and it is sometimes possible to remove an occluded Niti-S stent.
Asunto(s)

Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Poliuretanos / Stents / Estudios Prospectivos / Tablas de Vida / Descompresión / Membranas Tipo de estudio: Estudio observacional Límite: Humanos Idioma: Coreano Revista: Korean Journal of Gastrointestinal Endoscopy Año: 2001 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Poliuretanos / Stents / Estudios Prospectivos / Tablas de Vida / Descompresión / Membranas Tipo de estudio: Estudio observacional Límite: Humanos Idioma: Coreano Revista: Korean Journal of Gastrointestinal Endoscopy Año: 2001 Tipo del documento: Artículo