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Perioperative Methadone for Spine Surgery: A Scoping Review.

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Methadone may reduce pain and opioid use after complex spine surgery. While observational studies suggest safety concerns, prospective studies have not confirmed these risks, warranting further research.

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Area of Science:

  • Anesthesiology and Pain Management
  • Neurosurgery
  • Pharmacology

Background:

  • Complex spine surgery frequently results in severe acute postoperative pain.
  • Methadone's unique pharmacological profile suggests potential as an effective analgesic for major surgical procedures.

Purpose of the Study:

  • To conduct a scoping review summarizing existing evidence on the perioperative use of methadone in adults undergoing complex spine surgery.
  • To identify gaps in the literature regarding methadone's efficacy and safety in this patient population.

Main Methods:

  • A comprehensive literature search was performed across multiple databases (MEDLINE, CINAHL, Cochrane Library, Scopus, Embase, Joanna Briggs) from January 1946 to April 2023.
  • The review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines.
  • Twelve studies met the inclusion criteria from an initial 317 citations, revealing significant heterogeneity in methadone administration protocols.

Main Results:

  • Available literature indicates that perioperative methadone use is associated with decreased postoperative pain scores.
  • Studies suggest a reduction in overall postoperative opioid consumption when methadone is administered.
  • Observational studies have raised safety concerns, but these have not been substantiated by prospective randomized trials.

Conclusions:

  • Perioperative methadone appears to be a promising option for managing pain and reducing opioid requirements after complex spine surgery.
  • Further high-quality research is necessary to establish optimal dosing strategies, explore synergistic effects with other analgesics, and evaluate long-term benefits.
  • Prospective studies are needed to definitively address safety concerns raised by earlier observational data.