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Diversity of opioid requirements for postoperative pain control following oral surgery--is it affected by polymorphism of the μ-opioid receptor?

Fukuda, Ken-ichi ; Hayashida, Masakazu ; Ikeda, Kazutaka ; Koukita, Yoshihiko ; Ichinohe, Tatsuya ; Kaneko, Yuzuru

Anesthesia progress, 2010-01, Vol.57 (4), p.145-149 [Periódico revisado por pares]

United States: Allen Press Publishing Services

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  • Título:
    Diversity of opioid requirements for postoperative pain control following oral surgery--is it affected by polymorphism of the μ-opioid receptor?
  • Autor: Fukuda, Ken-ichi ; Hayashida, Masakazu ; Ikeda, Kazutaka ; Koukita, Yoshihiko ; Ichinohe, Tatsuya ; Kaneko, Yuzuru
  • Assuntos: Reprint
  • É parte de: Anesthesia progress, 2010-01, Vol.57 (4), p.145-149
  • Descrição: We experience individual differences in pain and sensitivity to analgesics clinically. Genetic factors are known to influence individual difference. Polymorphisms in the human OPRM1 gene, which encodes the μ-opioid receptors, may be associated with the clinical effects of opioid analgesics. The purpose of this study was to determine whether any of the 5 common single-nucleotide polymorphisms (SNPs) of the OPRM1 gene could affect the antinociceptive effect of fentanyl. Fentanyl was less effective in subjects with the G allele of the OPRM1 A118G SNP than in those with the A allele, and subjects with the G allele required more fentanyl for adequate postoperative pain control than those with the A allele. In the future, identifying SNPs might give us information to modulate the analgesic dosage of opioid individually for better pain control. Factors underlying individual differences in sensitivity to pain other than genetic factors may include environmental and psychological factors. We therefore examined the effects of preoperative anxiety on the analgesic efficacy of fentanyl in patients undergoing sagittal split mandibular osteotomy (SSMO). From among the patients enrolled in the study, 60 patients (male/female: 18/42, age: 24.6 ± 6.7 years) who gave informed consent were examined for correlations between preoperative trait/state anxiety, as measured by the state-trait anxiety inventory (STAI) on the day before surgery, and postoperative consumption of patient-controlled analgesia (PCA) fentanyl and visual analog scale (VAS) assessment by patients. Levels of trait and state anxieties measured by the STAI were correlated with neither the consumption of PCA fentanyl nor postoperative VAS assessment. These findings suggest that psychological factors are unlikely to affect postoperative pain or the use of analgesics.
  • Editor: United States: Allen Press Publishing Services
  • Idioma: Inglês
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