Safa B, Flynn B, McHardy PG, Kiss A, et al. Comparison of the Analgesic Duration of 0.5% Bupivacaine With 1:200,000
Epinephrine Versus 0.5% Ropivacaine Versus 1% Ropivacaine for Low-Volume
Ultrasound-Guided Interscalene Brachial Plexus Block: A Randomized Controlled
Trial. Anesth Analg 2021;132:1129-1137.
PMID: 33464760