Intraoperative naloxone reduces remifentanil-induced postoperative hyperalgesia but not pain: a randomized controlled trial.
Br J Anaesth
; 119(6): 1161-1168, 2017 Dec 01.
Article
em En
| MEDLINE
| ID: mdl-29029049
ABSTRACT
Background:
Intraoperative use of a high-dose remifentanil may induce postoperative hyperalgesia. Low-dose naloxone can selectively reverse some adverse effects of opioids without compromising analgesia. We thus hypothesized that the intraoperative use of a high-dose remifentanil combined with a low-dose naloxone infusion reduces postoperative hyperalgesia compared with the use of remifentanil alone.Methods:
Patients undergoing elective thyroid surgery were randomly assigned into one of three groups, depending on the intraoperative effect-site concentration of remifentanil, with or without a continuous infusion of naloxone 4 ng ml-1 remifentanil with 0.05 µg kg-1 h-1 naloxone in the high-remifentanil with naloxone group, and 4 or 1 ng ml-1 remifentanil with a placebo in the high- or low-remifentanil groups, respectively. We measured the pain thresholds (primary outcome) to mechanical stimuli using von Frey filaments and incidence of hyperalgesia on the peri-incisional area 24 h after surgery. We also measured pain intensity, analgesic consumptions and adverse events up to 48 h after surgery.Results:
The pain threshold presented as von Frey numbers [median (interquartile range)] was significantly lower in the high-remifentanil group (n=31) than in the high-remifentanil with naloxone (n=30) and the low-remifentanil (n=30) groups [3.63 (3.22-3.84) vs 3.84 (3.76-4.00) vs 3.80 (3.69-4.08), P=0.011]. The incidence of hyperalgesia was also higher in the high-remifentanil group than in the other groups [21/31 vs 10/30 vs 9/30, P=0.005]. Postoperative pain intensity, analgesic consumptions and adverse events were similar between groups.Conclusions:
The intraoperative use of low-dose naloxone combined with high-dose remifentanil reduced postoperative hyperalgesia but not pain. Clinical trial registration NCT02856087.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Dor Pós-Operatória
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Remifentanil
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Hiperalgesia
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Analgésicos Opioides
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Cuidados Intraoperatórios
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Naloxona
Tipo de estudo:
Clinical_trials
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Observational_studies
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Risk_factors_studies
Limite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article