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罗哌卡因乳酸-羟基乙酸共聚物微球家兔皮下给药的药效学和药动学研究 被引量:3

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摘要 目的:研究罗哌卡因聚乳酸-羟基乙酸微球(RoP-PLGA-MS)在家兔皮下给药的药效学和药代动力学。方法:24只新西兰兔随机分为A、B、C3组,分别皮下注射罗哌卡因(RoP)4mg/kg、RoP-PLGA-MS200mg/kg(相当于RoP12mg/kg)和PLGA-MS200mg/kg。以针刺皮肤无反应圈直径(PND)和逃跑运动电刺激阈值(EMT)评价镇痛效果。采用HPLC测定给药后各时间点血浆RoP浓度。结果:A、B组PNDmax为5.28和2.76cm,EMTmax为13.02和11.66s,给药1h后峰值浓度为2.238μg/mL和1.306μg/mL,消除半衰期为2.848h和17.606h,平均滞留时间为4.175h和24.823h。B组镇痛持续时间(34h)较A组(5h)长,C组无镇痛作用。结论:RoP-PLGA-MS局部镇痛持续时间长,扩散范围小,血药浓度稳定且水平低,表明其在体内有明显的缓释作用和良好的安全性。
出处 《实用医学杂志》 CAS 北大核心 2009年第8期1201-1203,共3页 The Journal of Practical Medicine
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