The prediction of fetal acidosis by means of intrapartum fetal pulse oximetry

Article Abstract:

Pulse oximetry can be used to predict fetal acidosis before the fetus is severely damaged. Acidosis occurs when the fetus is deprived of oxygen. This in turn causes the pH of the blood to drop. Researchers used a pulse oximeter that can be placed on the baby's head to measure oxygen levels in the blood. In a study of 400 deliveries, they also measured the pH of umbilical blood after the baby was born. Those with low Apgar scores and acidic blood had longer periods of low oxygen levels in the uterus. An oxygen saturation of 30% or less for 10 or more minutes was the best predictor of acidosis.

Evaluation, Forecasts and trends, Measurement, Oxygen, Oxygen in the body, Oximetry

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Predictive agreement between the fetal arterial oxygen saturation and fetal scalp pH: results of the German multicenter study

Article Abstract:

Monitoring fetal arterial oxygen saturation may provide a valid and noninvasive means of identifying fetuses that are being deprived of oxygen during labor. Oxygen deprivation from impaired blood supply leads to an increase in blood acidity and can be hazardous to the newborn. Researchers in Germany compared measurements of oxygen saturation with blood pH measurements obtained from fetal scalp blood samples. When the arterial oxygen saturation fell below 30%, it was highly predictive of a pH below 7.20 and evolving blood acidosis.

Methods, Fetal monitoring

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Doppler ultrasonographic evidence of intrapartum brain-sparing effect in fetuses with low oxygen saturation according to pulse oximetry

Article Abstract:

Doppler ultrasound imaging shows that when a fetus is deprived of oxygen, blood flow to the brain speeds up. This helps to spare the brain from the effects of low oxygen levels.

Statistical Data Included, Usage, Cerebral circulation, Hypoxia, Anoxia, Doppler ultrasonography

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