Table 1. StabilIty of Theophylline in Serum, Plasma, and Saliva
نویسندگان
چکیده
CLINICAL CHEMISTRY, Vol. 27, No. 12, 1981 2071 displacement during head rotation and vaginal examinations, and amniotic fluid contamination may explain in vivo differences. Biological factors, reflecting blood and tissue fluid, might also affect the measurements, producing real differences in tissue and blood pH values. At present, because of these differences, in vivo continuous measurement of TpH must make use of fetal scalp blood and umbilical artery pH for verification. However, the observed differences are not related to the systems of measurement. Further investigation is needed to find the reason for this blood and tissue pH discrepancy.
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