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布美他尼鞘内预先注药对大鼠急性伤害刺激诱发疼痛的影响

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摘要 目的观察布美他尼鞘内预先注药对切口痛模型大鼠疼痛行为的影响。方法健康雄性SD大鼠24只,随机分为对照组、注药组、切开组与实验组,每组各6只。对照组不作鞘内注药和切口痛模型;注药组单纯鞘内注射布美他尼100μg;切开组按Brennan方法制成切口痛模型;实验组先鞘内注射布美他尼100μg,然后制成切口痛模型。采用疼痛累计评分法、热辐射法及von Frey细丝法,观察大鼠不同时间点的疼痛累计评分、热痛阈及机械痛阈的变化。结果与对照组比较,注药组大鼠的热痛阈和机械痛阈均提高(P<0.05),分别于4 h和2 h恢复正常;切开组与实验组大鼠手术后均出现疼痛累计评分升高、热痛阈及机械性痛阈降低(P<0.05),但实验组大鼠疼痛累计评分升高的幅度低于切开组(P<0.05),热痛阈值及机械痛阈值的降低幅度也低于切开组(P<0.05)。结论鞘内预先给予布美他尼能减轻大鼠急性创伤后早期疼痛程度,提高热痛阈及机械痛阈,其抗伤害作用可能与布美他尼抑制脊髓钠钾氯协同转运蛋白1活动有关。
出处 《广东医学》 CAS CSCD 北大核心 2012年第9期1223-1225,共3页 Guangdong Medical Journal
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