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The effect of meconium on neonatal and fetal reflectance pulse oximetry



The effect of meconium on neonatal and fetal reflectance pulse oximetry



Journal of Perinatal Medicine 18(5): 351-355



Reflectance probes are being developed for neonatal use and obstetricians are beginning to use reflectance pulse oximetry to monitor the fetus. When a reflectance probe was used to monitor the arterial oxygen saturation of a baby whose skin was stained with meconium an artificially low result was obtained. This is because meconium absorbs more red than infra-red light and acts as a red light filter between the vascular bed and the probe. This effect may be reproduced by interposing a red filter between a reflectance pulse oximetry probe and the skin. Obstetricians who use a pulse oximeter to assess the fetus through intact membranes will record an erroneously low result if they are stained with meconium. Similarly neonatologists should avoid placing a reflectance pulse oximetry probe on babies skin which is stained with meconium.

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Accession: 007890114

Download citation: RISBibTeXText

PMID: 2292758

DOI: 10.1515/jpme.1990.18.5.351



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