[The measurement of blood lactate concentration and its age change in days on healthy infant].
We measured the lactate concentration in whole blood of healthy infant with use of the recently developed assay system consisting of an enzyme-coated electrode and a small meter. The mean values of blood lactate concentration at each age in days were not showed the significant difference between male and female infants. The trace of lactate concentration change in days showed the peak at the age in 1 days and then, gradually decreased to the almost constant level at the age in 6 days after. At the age in 6-7 days, the concentration mean values of infants, born in 38-40 gestational weeks were lower than that of 37 and 41 weeks one. It was assumed by mathematically that these equilibrium constant level of the lactate concentration in early neonatal period was arrived at 6.20 days and the equilibrium level was estimated to 1.29 mmol/l. As the results, the normal ranges were calculated to the value of 0.49-3.95 mmol/l as initial (age in 0-3 days) and that of 0.29-2.92 mmol/l as final (age in 6-7 days) period, by the truncation method, respectively.
Kinoshita
K
K
Department of Medical Informatics, Toyooka Hospital.
Maeda
E
E
Yoshida
S
S
D000375:Aging / Q000097:blood*; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn / Q000097:blood*; D007773:Lactates / Q000097:blood*; D008297:Male; D012016:Reference Values
D007773:Lactates