Multicenter study on the clinical value of fetal pulse oximetry: methodologic evaluation

Article Abstract:

The non-invasive method of measuring fetal oxygen saturation using a fetal pulse oximeter may be ultimately superior to fetal scalp blood sampling in assessing cases of possible fetal distress. Placement of an oximeter sensor was successful in 164 (95.3%) of 172 attempts when abnormal fetal heart rates were detected. Physicians and midwives positioning the sensor rated placement less difficult than scalp blood sampling. Fetal oxygen saturation values closely reflected fetal scalp blood analysis, and low saturation values were significantly associated with poor neonatal outcomes.

Diagnosis, Fetal distress, Fetal heart rate monitoring, Electronic fetal monitoring

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Fetal pulse oximetry and visual on-line signal identification in the second stage of labor

Article Abstract:

Visual identification of valid signals may ensure the accuracy of fetal pulse oximetry even during the pushing phase of labor. Pulse oximetry uses light to measure blood oxygenation. Motion can give a false reading. Researchers compared fetal reflection pulse oximetry readings taken in the last 10 minutes before birth with blood gas measurements made on umbilical cord blood sampled immediately after birth. The device enabled users to visually identify when there were valid signals. The correlation between the reading and the values at birth was good.

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Compared predictive values of pulse oximetry and fetal blood analysis

Article Abstract:

Oxygen saturation tests using an oximeter appear to be equally valuable as blood analysis tests for evaluating fetuses in distress. Oximetry tests were compared with blood analysis tests in 174 fetuses in apparent distress as indicated by abnormal fetal heart rates. Fetuses with oximetry readings of less than 30% and blood pH of less than 7.20 were equally likely to be born in respiratory distress, have low Apgar scores, or require neonatal intensive care.

Analysis, Fetal blood

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