Multimodal Analgesia and Opioid-Free Anesthesia in Spinal Surgery: A Literature Review.

To determine if opioid-free anesthesia, opioid-sparing anesthesia, or multimodal analgesia improved outcomes in patients undergoing spinal fusion. A literature review was performed by searching PubMed, CINAHL, Embase, Web of Science, and Cochrane Library. MeSH terms included "opioid free" AND "spine surgery," with alternative terms used including: regional anesthesia, multimodal analgesia, opioid-free anesthesia, enhanced recovery after surgery (ERAS), spinal surgery, spinal fusion, ACDF, cervical fusion, lumbar fusion, etc. Seven studies were deemed appropriate for inclusion with a combined sample size of n = 2,102. All of the seven included articles evaluated total opioid administration and found a reduction in total opioid administered in the research groups versus control groups. Six of the seven included articles evaluated postoperative pain scores with mixed results. Various additional benefits of opioid-free, opioid-sparing, or multimodal analgesia included: decreased hospital length of stay (LOS), decreased post-anesthesia care unit (PACU) LOS, decreased post-operative nausea and vomiting (PONV), and decreased post-operative opioid use through 30 days. For patients undergoing spine surgery, opioid-free, opioid-sparing, and multimodal analgesia will be less likely to experience the adverse effects of opioid analgesics and ultimately lead to better patient outcomes and reduced hospital stays.

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