Measurement of blood-oxygen saturation using a photoacoustic technique in the rabbit hypoxemia model View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2019-04

AUTHORS

Kiguna Sei, Masanori Fujita, Takeshi Hirasawa, Shinpei Okawa, Toshihiro Kushibiki, Hidenori Sasa, Kenichi Furuya, Miya Ishihara

ABSTRACT

The golden standard method to obtain accurate blood oxygen saturation is blood gas analysis that needs invasive procedure of blood sampling. Photoacoustic technique enables us to measure real-time blood oxygen saturation without invasive procedure. The aim of this study is to use the photoacoustic technique, an optical method, for accurately determining oxygen saturation in vivo. We measured induced photoacoustic signals of arterial blood in the rabbit model of stable hypoxemia after irradiation at 750 and 800 nm. Oxygen saturation was calculated from the photoacoustic signals using two calibration curves. Calibration curve 1 is a conventional curve derived from the absorbance coefficient of hemoglobin, whereas calibration curve 2 is derived from the photoacoustic signals obtained from the original blood vessel model. Simultaneously, blood-gas analysis was performed to obtain the reference standard of oxygen saturation. Regression analysis and Bland-Altman analysis were performed to assess the accuracy of oxygen saturation obtained using the two methods. The oxygen saturation calculated using calibration curves 1 and 2 showed strong correlations with the reference standard in regression analysis (R = 0.965, 0.964, respectively). The Bland-Altman analysis revealed better agreement and precision with calibration curve 2, whereas there was significant underestimation of values obtained using calibration curve 1. Photoacoustic measurement of oxygen saturation using calibration curve 2 provided an accurate estimate of oxygen saturation, which was similar to that obtained using a portable blood-gas analyzer. More... »

PAGES

269-279

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10877-018-0166-8

DOI

http://dx.doi.org/10.1007/s10877-018-0166-8

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1104433899

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/29876708


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