Modelling light propagation for fetal monitoring in utero
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Date
2019-06-23
Authors
Gunther, Jacqueline
Jayet, Baptiste
Burke, Ray
Andersson-Engels, Stefan
Journal Title
Journal ISSN
Volume Title
Publisher
SPIE-OSA
Published Version
Abstract
About one in three births in the United States is through Cesarean section. Current monitoring techniques are insufficient to determine hypoxia and acidosis in the fetus during labor. An FDA approved transvaginal fetal pulse oximeter has been used in clinical trials to show that the device can help decrease the rate of Cesarean section. However, this technique has not been adapted into normal hospital procedure. Past pre-clinical and clinical studies have shown the feasibility of transabdominal fetal pulse oximetry. To understand the fundamentals of transabominal fetal pulse oximetry, we examined a layer model with both Monte Carlo and NIRFAST simulations. The NIRFAST model was used to model concentric spheres to understand the effect on geometry. The simulations were used in order to determine how much optical power can be detected from the fetus with a light source at 850 nm. The signal decreased as the fetal depth increased and as source-detector distance increased. The results can be used to aid in the design of a transabdominal fetal pulse oximeter.
Description
Keywords
Fetal monitoring , Light propagating , Monte Carlo , NIRFAST , Pulse oximetry
Citation
Gunther, J., Jayet, B., Burke, R. and Andersson-Engels, S. (2019) 'Modelling light propagation for fetal monitoring in utero'. SPIE Proceedings. Clinical and Preclinical Optical Diagnostics II, Munich, Germany, 23-25 June, Optical Society of America, 11074_31 (3 pp). doi: 10.1117/12.2526758
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© SPIE-OSA 2019. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.