<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> 同等强度的剂量(2倍ED95),Belmont报道Cis与Atr的临床作用时间分别为45和4614分钟,本试验结果与之相仿,即同属于中等时效的非去极化肌松药。Cis增加(由2倍至3倍ED95)临床作用时间仅增加约516分钟,95%的肌松恢复时间增加仅约7分钟,肌松完全恢复时间延长仅7分钟,提示Cis无蓄积作用。Belmont报道Cis每增加2倍ED95的剂量,肌松作用时间仅延长23分钟左右[4],表明该药无蓄积作用,与其特有的Hofmann代谢方式有关。 Cis的25%~75%恢复指数与5%~95%的恢复指数分别约为12分钟与22分钟,文献报道分别为13分钟与30分钟左右[4],且与剂量大小无关,提示该药肌松恢复可预测性好,这是与该药的特有的代谢方式,即Hofmann代谢方式有关。Atr的25%~75%恢复指数为1018分钟,可见Cis与Atr的恢复过程相似。 总之,Cis具有中时效非去极化肌松药的肌松作用特点,与Atr相比,其作用强而起效较慢,有相似的代谢方式,即Hofmann代谢,无蓄积作用,肌松恢复过程亦相似。初步实验没有发现组胺释放征象,但其血药浓度与血浆的组胺浓度相关性有待进一步研究。 参考文献 1. age J Y,Melinovsky JM,Melinge M,et al. 51W89 :Dose2response ,neuromuscular blocking profile and cardiovascular effects.Anesthesiology,1993,79:A943. 2. tt RPF,Savarese JJ,Basta SJ,et al.Atracurium:clini2 cal strategies for preventing histamine release and attenuat2 ing the haemodynamic response.Br J Anaeth,1985,57:5502553. 3. CA ,elmont MR,Abalos A,et al. The cardiovascular effects and hitamine releasing properties of 51W89 in pa2 tients receiving nitrous oxide/barbiturate anesthesia.Anesthesiology,1995,82:113121138. 4. ment MR,Lien CA,Quessy S,et al. The clinical neu2 romuscular pharmacology of 51W89 in patients receiving ni2 trous oxide/ opioid/ babiturate anesthesia. Ansthesiology,1995,82:113921145. 5. an AF. Pancoronium,gallamine and d2tubocurarine compared: Is speed of onset inversely related to drug potency?Anesthesiology,1989,70:9152920. |