Pain levels and patient comfort after lower limb arthroplasty comparing i.v. patient-controlled analgesia, continuous peripheral nerve block and neuraxial analgesia: a retrospective cohort analysis of clinical routine data

下肢关节置换术后疼痛程度和患者舒适度比较：静脉患者自控镇痛、持续外周神经阻滞和椎管内镇痛的临床常规数据回顾性队列分析