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Efficacy of Intraoperative Dexmedetomidine Compared with Placebo for Postoperative Pain Management: A Meta-Analysis of Published Studies.

AbstractINTRODUCTION:
Dexmedetomidine (Dex) has sedative, analgesic, and anesthetic-sparing effects. This meta-analysis examines demonstrated intraoperative and postoperative effects of intraoperative Dex administration during pediatric surgery.
METHODS:
A search for randomized placebo-controlled trials was conducted to identify clinical trials examining intraoperative Dex use in children, infants, and neonates. Primary outcome was postoperative opioid consumption; secondary outcomes were: postoperative pain intensity and postoperative nausea and vomiting (PONV).
RESULTS:
Fourteen randomized controlled trials performed during painful procedures were analyzed. Intraoperative Dex administration was associated with significantly reduced postoperative opioid consumption in the postanesthesia care unit [PACU; risk ratio (RR) = 0.31 (0.17, 0.59), I (2) = 76%, p < 0.0001 and cumulative z score using trial sequential analysis], decreased pain intensity in PACU [standardized mean difference (SMD) = -1.18 (-1.88, -0.48), I (2) = 91%, p < 0.0001] but had no effect upon PONV incidence [RR = 0.67 (0.41, 1.08), I (2) = 0%, p = 0.48]. Subgroup analyses found administering Dex during adenotonsillectomy and using a bolus <0.5 µg/kg (irrespective to the use of a continuous administration) without effects on studies outcomes. Heterogeneity was high among results and a high suspicion of publication bias was present for all analyzed outcomes.
CONCLUSIONS:
This meta-analysis shows that intraoperative Dex administration in children reduces postoperative opioids consumption and postoperative pain in PACU. According to our results, optimal bolus dose was found to be ≥0.5 µg/kg. Future studies have to explore this particular point and the postoperative analgesic effects of Dex during longer periods.
AuthorsMyriam Bellon, Alix Le Bot, Daphnée Michelet, Julie Hilly, Mathieu Maesani, Christopher Brasher, Souhayl Dahmani
JournalPain and therapy (Pain Ther) Vol. 5 Issue 1 Pg. 63-80 (Jun 2016) ISSN: 2193-8237 [Print] New Zealand
PMID26861737 (Publication Type: Journal Article)

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