alexa The efficacy of dexmedetomidine versus morphine for postoperative analgesia after major inpatient surgery.
Anesthesiology

Anesthesiology

Journal of Anesthesia & Clinical Research

Author(s): Arain SR, Ruehlow RM, Uhrich TD, Ebert TJ

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Abstract Thirty-four patients scheduled for elective inpatient surgery were randomized equally to receive either dexmedetomidine (initial loading dose of 1- microg/kg over 10 min followed by 0.4 microg. kg(-1). h(-1) for 4 h) or morphine sulfate (0.08 mg/kg) 30 min before the end of surgery. We determined heart rate (HR), mean arterial blood pressure (MAP), respiratory rate (RR), sedation and analgesia (visual analog scale), and use of additional morphine in the postanesthesia care unit (PACU) and up to 24 h after surgery. Groups were similar for patient demographics, ASA physical status, surgical procedure, baseline hemodynamics, and intraoperative use of drugs and fluids. Dexmedetomidine-treated patients had slower HR in the PACU (by an average of 16 bpm), whereas MAP, RR, and level of sedation were similar between groups. During Phase I recovery, dexmedetomidine-treated patients required significantly less morphine to achieve equivalent analgesia (PACU dexmedetomidine group, 4.5 +/- 6.8 mg; morphine group, 9.2 +/- 5.2 mg). Sixty minutes into recovery only 6 of 17 dexmedetomidine patients required morphine in contrast to 15 of 17 in the morphine group. The administration of dexmedetomidine before the completion of major inpatient surgical procedures significantly reduced, by 66\%, the early postoperative need for morphine and was associated with a slower HR in the PACU. IMPLICATIONS: The use of dexmedetomidine for postoperative analgesia resulted in significantly less additional pain medication (morphine) and slower heart rates than a control group receiving only morphine. These outcomes may prove advantageous for patients who might be placed at higher risk by tachycardia or large doses of morphine.
This article was published in Anesth Analg and referenced in Journal of Anesthesia & Clinical Research

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