Local infiltration analgesia versus interscalene nerve block for postoperative pain control after shoulder arthroplasty: a prospective, randomized, comparative noninferiority study involving 99 patients.

Background: The aim of this study was to compare the efficacy of local infiltration analgesia (LIA) and interscalene nerve block (ISB) for early postoperative pain control after total shoulder arthroplasty (TSA). The hypothesis was that LIA is not inferior to ISB.

Methods: A prospective, randomized controlled study was performed in 2014-2016.