Erschienen in:
01.11.2012 | Original Article—Liver, Pancreas, and Biliary Tract
One- and two-step self-expandable metal stent placement for distal malignant biliary obstruction: a propensity analysis
verfasst von:
Tsuyoshi Hamada, Yousuke Nakai, Hiroyuki Isayama, Osamu Togawa, Hirofumi Kogure, Kazumichi Kawakubo, Takeshi Tsujino, Naoki Sasahira, Kenji Hirano, Natsuyo Yamamoto, Yukiko Ito, Takashi Sasaki, Suguru Mizuno, Nobuo Toda, Minoru Tada, Kazuhiko Koike
Erschienen in:
Journal of Gastroenterology
|
Ausgabe 11/2012
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Abstract
Background
Although self-expandable metal stents (SEMS) are widely used for distal malignant biliary obstruction, one-step SEMS (direct placement without a prior plastic stent) and two-step SEMS (placement at second endoscopic retrograde cholangiopancreatography [ERCP] following plastic stent placement) have not been fully compared.
Methods
In this multicenter retrospective study, patients were included who underwent first-time endoscopic SEMS placement between September 1994 and December 2010. We compared the one-step and two-step strategies using a propensity analysis.
Results
In total, 370 patients were identified and one-step SEMS was performed in 59 patients. After adjustment using propensity scores, the median times to dysfunction were 116 and 219 days, respectively, for one-step and two-step SEMS (P = 0.058). Stent migration was more frequently observed in one-step SEMS as compared with two-step SEMS (25 vs. 11 %, P = 0.031). In one-step SEMS, the number of days of hospitalization associated with first-time SEMS placement was shorter compared with that in two-step SEMS (21 vs. 30 days, P = 0.001), and the total costs of SEMS-related interventions within 6 months were lower (6510 and 8100 USD, P = 0.004). The pathological diagnosis rates for pancreatic and biliary tract cancer at initial ERCP were 52 and 61 %. After failed diagnosis at initial ERCP, pathological diagnosis rates for pancreatic cancer were 32 versus 76 % (P = 0.005) by repeated ERCP versus endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA).
Conclusions
One-step SEMS was associated with increased stent migration, despite having potential cost-effectiveness. The additional yield of pathological diagnosis at repeated ERCP was low compared with that yielded by EUS-guided FNA.