Whole blood and Plasma Vitamin C Concentrations of Elementary School Children in Chinju

PURPOSE: Recommended dietary allowance of vitamin C was determined on the basis of preventing the scurvy without considerations of the important function of the vitamin C as a first line antioxidant. So we measured the whole blood and plasma vitamin C concentrations of the contemporay healthy elementary school children in Chinju for the establishment of the optimal daily vitamin C requirment in the elementary school children. METHODS: Whole blood and plasma vitamin C concentrations were measured by the 2,4-dinitrophenylhydrazine method in 338 children from the 1st to the 6th grade of one elementary school in Chinju. RESULTS: Whole blood and plasma vitamin C concentrations were 1.36+/-0.34mg/dL and 1.07+/-0.33mg/dL respectively. There existed an close relationship between whole blood and plasma vitamin C concentrations (r=0.77, p=0.0001). Whole blood vitamin C concentration decreased as the age became older (r=-0.22 p=0.0001), but plasma vitamin C concentration did not change. There were no sex differences in the whole blood and plasma vitamin C concentrations except in the 3rd grade (p<0.05). Twenty-three of 338 elementary school children (6.8%) had the plasma vitamin C concentration less than 0.6mg/dL. CONCLUSIONS: We produced the blood and plasma vitamin C concentrations of the contemporay elementary school children in Chinju. These values were not satisfactory in consideration of the importance of the childhood health.

Exchange Transfusion Using Percutaneous Femoral Vein Catheterization in Neonates: Comparison with Umbilical Vein Catheterization

Traditionally umbilical vein has been used for exchange transfusion in neonates. This method is relatively safe and effective but with a few complications. So via percutaneous femoral vein catheters we tried exchange transfusions in 30 patients with neonatal hyperbilirubinemia admitted to GNUH from September 1990 to August 1992. Femoral vein catheterization succeeded in 2~3 trials, In all cases high bilirubin level was lowered by half at the end of exchange transfusion. Transient microscopic hematuria by bladder puncture occurred in one neonate. Exchange transfusion via femoral vein catheter is a sage, easy and effective method.