Fifty-nine patients with unilateral multiple rib fractures were randomized to receive either ultrasound-guided serratus anterior plane block (SAPB) with continuous local anaesthetic infusion (n=30) or thoracic epidural analgesia (EA) (n=29). The primary outcome of interest was the reduction in the numerical rating scale (NRS) pain score at rest and upon movement from baseline to Day 2. Secondary o...