The technology, known as fetal oxygen saturation monitoring, was designed for use along with electronic fetal monitoring, which tracks the fetal heart rate, to measure changes in fetal oxygen levels. Designers of the new technology hoped that knowing the oxygen status of the baby during labor would provide information on the health of the baby, especially when there were disturbances in the fetal heart rate during labor.
"The results of this study show that while a new technology may appear to be very promising, it's not possible to know how effective it will be until it can be fully tested under clinical conditions," said Duane Alexander, M.D., Director of NIH's National Institute of Child Health and Human Development, which operates the network.
The study, appearing in the November 23 New England Journal of Medicine, was conducted by researchers in the NICHD Maternal-Fetal Medicine Units Network. The study's first author was Steven L. Bloom, M.D., of the University of Texas Southwestern Medical Center in Dallas.
"Fetal oxygen saturation monitoring offered no apparent advantage in interpreting the meaning of abnormal fetal heart rates," said Catherine Spong, M.D., an author of the study and Chief of NICHD's Pregnancy and Perinatology Branch. "Abnormal oxygen readings were common among babies showing abnormal heart rates but they were also common among babies with normal heart rates."
The study authors noted that a technology developed earlier, electronic fetal heart rate monitoring, was adopted for use in delivery rooms without prior testing. Although electronic fetal heart rate monitoring is in widespread use, the study authors added, there is controversy about the tec
Source:NIH/National Institute of Child Health and Human Development