欢迎访问《中国临床药理学与治疗学》杂志官方网站,今天是

中国临床药理学与治疗学 ›› 2013, Vol. 18 ›› Issue (9): 1004-1007.

• 基础研究 • 上一篇    下一篇

等容量血液稀释对罗哌卡因犬药代动力学的影响

董锡臣1, 黄宇光2   

  1. 1中国中医科学院广安门医院麻醉科,北京 100053;
    2中国医学科学院北京协和医院麻醉科,北京 100730
  • 收稿日期:2013-02-04 修回日期:2013-07-30 发布日期:2013-09-07
  • 作者简介:董锡臣,男,医学博士,副教授,从事麻醉与疼痛的临床科研工作。Tel: 010-88001043 E-mail: gamhdongxc@yahoo.cn; 黄宇光,男,教授,博士生导师,从事麻醉与疼痛的临床科研工作。Tel: 010-65295580 E-mail: pumhhyg@yahoo.com.cn

Effect of isovolemic hemodilution on pharmacokinetics of ropivacaine for sciatic nerve block in dogs

DONG Xi-chen1, HUANG Yu-guang2   

  1. 1Department of Anesthesia, Guanganmen Hospital, China Acadamy of Chinese Medical Science, Beijing 100053,China;
    2Department of Anesthesia, Peking Union Medical College Hospital, Chinese Aademy of Medical Sciences, Beijing 100730, China
  • Received:2013-02-04 Revised:2013-07-30 Published:2013-09-07

摘要: 目的: 探讨等容血液稀释对罗哌卡因阻滞犬坐骨神经时药代动力学的影响。方法: 健康杂种犬12只,体重 13.5~15.8 kg,年龄6~8月龄,随机分为两组(n=6):A组为等容血液稀释组,B组为对照组。肌肉注射3%戊巴比妥钠 30 mg/kg 麻醉后,解剖坐骨神经,鞘内置管,恢复 48 h。股静脉与股动脉穿刺。等容量血液稀释组由股动脉放血,同时经股静脉1∶1快速输入6%羟乙基淀粉,直至红细胞压积达25%。两组分别采用 0.5%罗哌卡因 10 mg/kg 行单次坐骨神经阻滞,分别于罗哌卡因给药前、给药后10、20、30、40、60、90、120、150、180、240、360、720 min 抽取股动脉血 5 mL,反相高效液相色谱法测定血浆罗哌卡因浓度,监测心电图(ECG)、血压(BP)、心率(HR),记录不良反应。结果: 两组未见中枢神经系统毒性反应和其他局麻药中毒症状,各时点HR、收缩压(SBP)、舒张压(DBP)、平均动脉压(MAP)差异无统计学意义(P>0.05)。血液稀释组分布半衰期(t1/2α)、峰值浓度(Cmax)、曲线下面积(AUC)、一阶矩曲线下面积(AUMC)降低,消除半衰期(t1/2β)、达峰时间(tmax)延长(P<0.01)。结论: 等容血液稀释对罗哌卡因的药代动力学产生影响,降低了血药峰值浓度(Cmax)。

关键词: 罗哌卡因, 药代动力学, 血液稀释

Abstract: AIM: To investigate the effect of isovolemic hemodilution on pharmacokinetics of ropivacaine for sciatic nerve block in dogs.METHODS: Twelve healthy adult mongrel dogs (6 male, 6 female) weighing 13.5-15.8 kg were divided into 2 groups (n=6 each): isovolemic hemodilution group and control group.The animals were anesthetized with intramuscular 3% pentobarbital 30 mg/kg.A polyethylene catheter was surgically inserted into the sheath of sciatic nerve for nerve block with ropivacaine. Femoral artery and vein was cannulated respectively. Isovolemic hemodilution group was conducted by removing blood from femoral artery and replacing it with 6% hydroxyethyl starch(HES) until hematocrit(Hct) was reduced to 25%. Ropivacaine 10 mg/kg was injected into the sheath of sciatic nerve through the catheter at 48 hours after cannulation.Arterial blood samples (5 mL)were taken for determination of plasma ropivacaine concentration (using HPLC) before and at 10, 20, 30, 60, 90, 120, 150, 180, 240, 360 and 720 min after ropivacaine injection.The pharmacokinetic parameters were determined from concentration-time data using DAS 1.0 software package.Electrocardiogram(ECG),blood pressure(BP), heart rate(HR)and heart rate(HR)were continuously monitored before and after ropivacaine injection.RESULTS: No signs of cardiovascular or central nervous system(CNS) toxicity were observed after sciatic nerve block with ropivacaine in the two groups.The pharmacokinetic parameters of t1/2α,Cmax,AUC,AUMC were decreased in the isovolemic hemodilution group, but t1/2β,tmax were increased.CONCLUSION: Normovolemic hemodilution leads to lower plasma ropivacaine concentrations after epidural anesthesia, probably due to an increased volume of distribution.

Key words: Ropivacaine, Pharmacokinetics, Hemodilution

中图分类号: