Dexmedetomidine reduces propofol and remifentanil requirements during bispectral index-guided closed-loop anesthesia: a double-blind, placebo-controlled trial
| Autor: | Dominique Dardelle, Olivier Tuil, Pierre-Antoine Laloë, Daniel I. Sessler, Felix Tounou, Marc Fischler, Thierry Chazot, Francis Bonnet, Morgan Le Guen, Marion Augé, Ngai Liu |
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| Rok vydání: | 2014 |
| Předmět: |
Agonist
Adult Male medicine.medical_specialty medicine.drug_class Remifentanil Anesthesia General law.invention Intraoperative Period Consciousness Monitors Randomized controlled trial Double-Blind Method Piperidines law Medicine Humans Hypnotics and Sedatives Vasoconstrictor Agents Dexmedetomidine Propofol Aged Ephedrine business.industry Hemodynamics Middle Aged Surgery Anesthesiology and Pain Medicine Bispectral index Anesthesia Sedative Anesthesia Recovery Period Anesthesia Intravenous Atracurium Female business Algorithms Anesthetics Intravenous medicine.drug Neuromuscular Nondepolarizing Agents |
| Zdroj: | Anesthesia and analgesia. 118(5) |
| ISSN: | 1526-7598 |
| Popis: | The α2-adrenergic agonist dexmedetomidine is a sedative and can be used as an adjunct to anesthetics. Our primary goal was thus to determine the extent to which dexmedetomidine reduces the requirement for propofol and remifentanil.This double-blinded, randomized study (NCT00921284) used an automated dual closed-loop administration to maintain the Bispectral Index between 40 and 60. Sixty-6 ASA physical status I and II patients were given either dexmedetomidine (1 μg/kg over 10 minutes followed by a continuous infusion of 0.5 μg/kg/h throughout surgery) or comparable volumes of saline as a placebo. Propofol and remifentanil requirements were compared using nonparametric tests and expressed as medians (interquartile ranges).Twenty-eight patients in each group completed the study. Patients given dexmedetomidine required less propofol (1.0 [0.7-1.3] vs 1.3 [1.0-1.7] mg/kg, P = 0.002) and remifentanil (1.2 [1.0-1.4] vs 1.6 [1.1-2.8] μg/kg, P = 0.02) for anesthetic induction. The propofol dosage required for anesthetic maintenance was 29% (with a 95% confidence interval, 18-40) lower in patients given dexmedetomidine (2.2 [1.5-3.0] vs 3.1 [2.4-4.5] mg/kg/h, P = 0.005), whereas the remifentanil dosage was not significantly different (0.16 [0.09-0.17] vs 0.14 [0.13-0.21] μg/kg/h with P = 0.3). The incidence of adverse events, including hemodynamic instability and delayed recovery, was comparable with and without dexmedetomidine. The first postoperative request for morphine analgesia was delayed in patients given dexmedetomidine (median fourth hour vs first hour, P = 0.008).Dexmedetomidine administration significantly reduced the requirement for both propofol and remifentanil during anesthetic induction and reduced propofol use during maintenance of anesthesia. Dexmedetomidine also delayed postoperative analgesic use. Dexmedetomidine is a useful adjuvant that reduces anesthetic requirement and provides postoperative analgesia. |
| Databáze: | OpenAIRE |
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