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Endoscopic retrograde cholangiopancreatography is technically challenging to perform in patients with surgically altered anatomy (SAA). For these patients, endoscopic ultrasound-guided biliary drainage (EUS-BD) is one of the good indications. The aim of our systematic review and meta-analysis was to identify and evaluate evidence of the efficacy and safety of EUS-BD in patients with SAA. A systematic review of the PubMed was conducted through to December 2021 to identify studies performing EUS-BD in patients with SAA. The primary outcome was the pooled technical success proportion in patients with SAA. The pooled clinical success and adverse event proportions in patients with SAA were also analyzed. The search identified 1195 possible records, with 18 studies meeting our criteria for analysis, reporting data for 409 patients with SAA who underwent EUS-BD. The pooled technical success, clinical success and adverse event proportions in patients with SAA were 97.8% (95% confidence interval [CI], 95.8–99.7%), 94.9% (95% CI, 91.8–98.1%), and 12.8% (95% CI, 7.4–18.1%), respectively. EUS-BD is effective for patients with SAA. However, adverse events should be considered when performing EUS-BD in these patients.

Endoscopic ultrasound‑guided biliary drainage in patients with surgically altered anatomy: a systematic review and Meta‑analysis