Evaluation of hyperspectral NIRS for quantitative measurements of tissue oxygen saturation by comparison to time-resolved NIRS

Near-infrared spectroscopy (NIRS) is considered ideal for brain monitoring during preterm infancy because it is non-invasive and provides a continuous measure of tissue oxygen saturation (StO 2 ). Hyperspectral NIRS (HS NIRS) is an inexpensive, quantitative modality that can measure tissue optical p...

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Bibliographic Details
Published in:Biomedical optics express 2019-09, Vol.10 (9), p.4789-4802
Main Authors: Kewin, Matthew, Rajaram, Ajay, Milej, Daniel, Abdalmalak, Androu, Morrison, Laura, Diop, Mamadou, St Lawrence, Keith
Format: Article
Language:English
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Summary:Near-infrared spectroscopy (NIRS) is considered ideal for brain monitoring during preterm infancy because it is non-invasive and provides a continuous measure of tissue oxygen saturation (StO 2 ). Hyperspectral NIRS (HS NIRS) is an inexpensive, quantitative modality that can measure tissue optical properties and oxygen saturation (StO 2 ) by differential spectroscopy. In this study, experiments were conducted using newborn piglets to measure StO 2 across a range of oxygenation levels from hyperoxia to hypoxia by HS and time-resolved (TR) NIRS for validation. A strong correlation between StO 2 measurements from the two techniques was observed (R 2  = 0.98, average slope of 1.02 ± 0.28); however, the HS-NIRS estimates were significantly higher than the corresponding TR-NIRS values. These regression results indicate that HS NIRS could become a clinically feasible method for monitoring StO 2 in preterm infants.
ISSN:2156-7085
2156-7085
DOI:10.1364/BOE.10.004789