ABSTRACT
Objective To investigate optimum dose of anesthesia in pediatric axillary brachial plexus branch block under ultrasound-guided. Methods Forty-eight children from May 2012 to May 2013 in hand surgery of our hospital,whose age was from 6 to 12 years,were randomly divided into four groups, each group has 12 cases. The doses of Ropivacaine were different in different groups. Group A was 0. 25 mL/kg,group B was 0. 2 mL/kg,group C was 0. 15 mL/kg,group D was 0. 10 mL/kg. And Ketamine was added to the treatment ac-cording to the incidence of anesthesia intraoperative. Evaluating the effect of anesthesia according to the situation of nerve block,observing an-esthesia duration time,dosage of anesthesia and rates of complications. Results The blocking effect of group A,B and C in each nerve area was correspond after 30 min,and anesthesia efficiency was higher than group D,but additional rate was lower than group D,the differences were statistically significant (P<0. 05). The block time in group D was shorter than the other groups,and the dose of Ketamine was most, and the block onset,perfect time were longer than the other groups (P<0. 05). But the differences between group A,B,C were not signifi-cant. Two cases in group D converted to general anesthesia. Four groups did not occur complication related narcotic drug. Conclusion In pediatric brachial plexus block used Ropivacaine under ultrasound-guided would get complete branch block,the exact effect of anesthesia, smaller dosage of local anesthesia. When the dosage of Ropivacaine was 0. 15 mL/kg could achieve a better anesthesia effect.