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  • Title: Expandable metal stents for endoscopic bilateral stent-within-stent placement for malignant hilar biliary obstruction.
    Author: Chahal P, Baron TH.
    Journal: Gastrointest Endosc; 2010 Jan; 71(1):195-9. PubMed ID: 19945101.
    Abstract:
    BACKGROUND: Placement of biliary stents is effective for palliation of unresectable hilar malignant biliary obstruction. However, when bilateral self-expandable metal stents (SEMSs) are used, placement can be technically challenging. In many studies, side-by-side placement is performed, although it is unclear whether this is the most anatomical and functional approach. OBJECTIVE: We sought to assess the technical feasibility and effectiveness of deploying bilateral SEMSs with a stent-within-stent approach using commercially available stents with a large cell width. DESIGN: Retrospective study. SETTING: Tertiary care medical center. PATIENTS: Patients with malignant biliary hilar obstruction referred for endoscopic palliation of obstructive jaundice. MAIN OUTCOME MEASUREMENTS: Technical success, ie, successful bilateral SEMS placement across the stricture; functional success, ie, decrease in pretreatment bilirubin level; early and late complications; and stent patency. RESULTS: Bilateral biliary drainage was attempted and successfully established in 21 patients with malignant hilar obstruction (15 men, 6 women; mean age 63.7 [standard deviation 13.9] years), resulting in clinical improvement of obstructive symptoms. Median follow-up was 6.14 months (interquartile range 3.5-9.5 months). There were 1 (5%) early and 7 (33%) late stent occlusions that required endoscopic reintervention. The 30-day mortality rate was 10% (2 deaths). LIMITATIONS: Retrospective study of a series of cases treated at a tertiary care center by expert endoscopists. CONCLUSIONS: This simple technique was performed by using an open-cell expandable metal stent is technically feasible and easy and allows bilateral placement of SEMSs in patients with unresectable hilar malignancy.
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