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KMID : 0381219900220040384
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Journal of RIMSK
1990 Volume.22 No. 4 p.384 ~ p.390
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The Study on the Cord Blood Acid-Base Status of the Newborn in Normal Spontaneous Vaginal Delivery and Cesarean Section
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Abstract
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This study was performed in order to understand the acid-base status of mother and newborn during parturition and the effect of stressful normal labor on fetal acid-base status through the comparison of acid-base level of newborn delivered by normal spontaneous vaginal delivery with that of newborn by elective cesarean section.
We analyzed acid-base status of maternal radial arterial blood and fetal umbilical arterial and venous blood such as pH, pO2, pCO2, bicarbonate, 02 saturation in 50 mother and her newborn pairs from July, 1989 to July, 1990 in Chung-Ang University Hospital.
The results were as follows;
1) Maternal arterial mean value were pH 7.36, pO2 101.6mmHg, pCO2 28.18mmHg, bicarbonate 16. 25 mEq/L and 02 saturation 95.67%.
2) Umbilical arterial mean value in normal spontaneous vaginal delivery were pH 7.25, p02 19.96 mmHg, pCO2 47.33, bicarbonate 20.62 mEq/L and 02 saturation 27.73%, while umbilical venous mean value were pH 7.30., pO2 25.16 mmHg, pCO2 41.3mmHg, bicarbonate 19.99 mEq/L and O2 saturation 38.3%.
3) Umbilical arterial mean value in cesarean section were pH 7.28, pO2 26.52 mmHg, pCO2 49.13 mmHg, bicarbonate 22.76 mEq/L and 02 saturation 39.65%, while umbilical venous mean value were pH 7.32, pO2 41.77 mmHg, pCO2 41.28 mmHg, bicarbonate 21.60 mEq/L and 02 saturation 69.15%.
4) There was significant increase of mean pH, PO2, bicarbonate in the newborn delivered by cesarean section in comparison to delivered by normal spontaneous vaginal delivery, but there was no difference in the pC02 between both of them.
Analysis of umbilical cord arterial and venous blood for acid-base can be of benefit in retrospectively assessing the intrapartum condition of the fetus and in evaluating obstetric management of labor.
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