to determine in infants and children the neuromuscular effect of pipecuronium during alfentanil-n2o/o2 anesthesia , the authors studied 32 asa physical status 1 and 2 pediatric patients undergoing minor elective surgery , divided into three groups according to their age : group 1 included 12 infants , 1.9 +/- 0.2 months old ( mean +/- se ; range , 20 days to 3 months ) , weighing 5.2 +/- 0.3 kg ;
C0004057
asa
C0021270
infants