Optoacoustic monitoring of cerebral venous blood oxygenation though intact scalp in large animals

I. Y. Petrov, Y. Petrov, D. S. Prough, I. Cicenaite, D. J. Deyo, R. O. Esenaliev

Research output: Contribution to journalArticle

45 Scopus citations

Abstract

Monitoring (currently invasive) of cerebral venous blood oxygenation is a key to avoiding hypoxia-induced brain injury resulting in death or severe disability. Noninvasive, optoacoustic monitoring of cerebral venous blood oxygenation can potentially replace existing invasive methods. To the best of our knowledge, we report for the first time noninvasive monitoring of cerebral venous blood oxygenation through intact scalp that was validated with invasive, "gold standard" measurements. We performed an in vivo study in the sheep superior sagittal sinus (SSS), a large midline cerebral vein, using our novel, multiwavelength optoacoustic system. The study results demonstrated that: 1) the optoacoustic signal from the sheep SSS is detectable through the thick, intact scalp and skull; 2) the SSS signal amplitude correlated well with wavelength and actual SSS blood oxygenation measured invasively using SSS catheterization, blood sampling, and measurement with "gold standard" CO-Oximeter; 3) the optoacoustically predicted oxygenation strongly correlated with that measured with the CO-Oximeter. Our results indicate that monitoring of cerebral venous blood oxygenation may be performed in humans noninvasively and accurately through the intact scalp using optoacoustic systems because the sheep scalp and skull thickness is comparable to that of humans whereas the sheep SSS is much smaller than that of humans.

Original languageEnglish (US)
Pages (from-to)4159-4167
Number of pages9
JournalOptics Express
Volume20
Issue number4
DOIs
StatePublished - Feb 13 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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