抄録
The gallbladder size and its contractile ratio before, during and after oral feeding were examined by ultrasound in 47 normal controls (32 neonates and 15 infants), 3 patients with neonatal hepatitis and 6 patients with congenital biliary atresia. In the control group, the gallbladder size increased its during oral feeding. The muximum size of sonographic gallbladder in two dimensions was 1.14±0.43cm^2 before feeding, 1.59±0.31cm^2 during feeding and 0.76±0.40 cm^2 after feeding. Contractile ratio between maximum and minimum size of gallbladder was 59%. The patients with neonatal hepatitis showed almost the same gallbladder contraction as the control group. However in all 6 patients with biliary atresia we could not identify the gallbladder before, during and after oral feeding. These results suggests that identification of the gallbladder with normal contractile ratio by ultrasound may be applicable to make differential diagnosis of neonatal hepatitis from biliary atresia in infants with jaundice.
