不同年龄患儿罗库溴铵药效学的比较

目的 比较新生儿、婴儿、幼儿和儿童罗库溴铵的药效学.方法 择期全麻手术患儿160例,ASAⅠ或Ⅱ级,根据年龄分为4组(n=40):新生儿组、婴儿组、幼儿组及儿童组.各组随机选取患儿20例,采用4次累积给药法静脉注射罗库溴铵,初始剂量:新生儿组40 μg/kg,婴儿组80 μg/kg,幼儿组及儿童组均为120 μg/kg,后3次均追加罗库溴铵40μg/kg.每次给药后.观察TOF反应.当T1连续3次稳定不变时,给予下一次剂量.采用概率单位法计算T1抑制50%、90%、95%的用药量(ED50、ED90、ED95).各组随机选取20例患儿,静脉注射2倍ED95剂量的罗库溴铵,记录肌松起效时间、高峰时间、临床肌松时间、体内作用时间和恢复指数.结果 与新生儿组比较,幼儿组和儿童组罗库溴铵ED50、ED90和ED95均升高(P<0.01),婴儿组上述指标差异无统计学意义(P>0.05).婴儿组、幼儿组和儿童组罗库溴铵起效时间、临床肌松时间和体内作用时间缩短,恢复指数降低(P<0.01);与幼儿组比较.儿童组罗库溴铵ED50、ED90和ED95升高(P<0.01).结论 不同年龄患儿对罗库溴铵的量效关系和时效关系存在明显的差别,新生儿对罗库溴铵的敏感性最强.

Comparison of pharmacodynamics of rocuronium in different age children

Objective To compare pharmacodynamics of rocuronium in neonates,infants,young children and children.Methods One hundred and sixty ASA Ⅰ or Ⅱ pediatric patients undergoing elective surgical procedures under total intravenous anesthesia(TIVA)were divided into 4 groups according to ages(n=40 each):neonate group(0-28d),infant group(28 d0.05).Onset time of muscle relaxation.clinical duration and total duration were significantly shorter and recovery index lower in the other 3 groups than in neonate group(P<0.01).but there was no significant difference in the duration of peak effect among the 4 groups(P>0.05).ED50,ED90 and ED95 of rocuronium were significantly higher in children group than in young children group(P<0.01).Conclusions There are significant differences in dose-effect and time-effect relationships among different age children and neonate is more sensitive to rocuronium than the other age children.