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KMID : 0367419770180090001
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Journal of Korean Pediatric Society
1977 Volume.18 No. 9 p.1 ~ p.13
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Studies on Normal Values for Red Blood Cells of Korean Newborn and Infants
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裵錫救/Bai, Seockoo
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Abstract
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Infancy is the period of most rapid extrauterine growth and physiologic changes. There is apt to be a physiologic anemia at 2^-3 month and an iron deficiency anemia at 6^18 month possibly due to an inadequate weaning diet.
Korea has improved her social and economic status during the last few decades and mothers are more concerning about weaning diet and infant care.
The author checked hemoglobin, hematocrit and R.B.C. counts on 803 cases (male 435, female 368) of healthy Korean newborns and infants up to 30 months of birth. Mean corpuscular volume, mean corpuscular hemoglobin and mean corpuscular hemoglobin concentration were calculated as usual, according Wintrobe.
Conclusions;
1. The highest hemoglobin level was 19.29M/100 ml at 5 days after birth, and the lowest level 10.8gm/100 ml at 13 month. Thereafter the values were 11.411.9gm1100 ml up to 2 years.
2. The average value of the hematocrit was 62% at 5 days after birth and M% at 1---3 month. Thereafter it averaged 36^37% up to 2 years.
3. The average RBC court was 5, 660, 000/cub.mm at 5 days after birth, which was the highest level, and the lowest level 3, 760, 000/cub.mm was at 12 month. Thereafter the average RBC count was 4,350,0004, 840, 000/cub.mm up to 2 years.
4. The average M.C.V. value, 113 cub. micron at birth, gradually decreased till abouc 1 year
(13^ 15 month), when the value averaged 76 cub. micron. Trereafter it increased gradually.
5. The average M.C.H. value was highest at birth (37r,) and then,decreased gradually.At 1
year (10^11 month) the value was lowest, being 24rr. Thereafter it increased gradually.
6. The average M.C.H.C. value was 31^33% regardless the age groups.
7. No sex difference was noticed in all age groups.
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