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Continuous plexus and peripheral nerve blocks for postoperative analgesia.

T here is increasing interest in peripheral nerve blocks because of potential benefits and concerns over interactions of anticoagulants and central neuraxial techniques. In a recent survey of members of the American Society of Anesthesiologists and the American Society of Regional Anesthesia and Pain Medicine, nearly half of the respondents anticipated an increased use of peripheral nerve blocks in their practice (1). Continuous plexus and peripheral nerve blocks offer the potential benefits of prolonged analgesia with fewer side effects, greater patient satisfaction, and faster functional recovery after surgery. In this review article, we summarize pertinent anatomy, technical aspects, and current evidence when available in prospective randomized trials for the indications and efficacy of continuous perineural techniques for postoperative analgesia.