Journal
BIOMEDICAL OPTICS EXPRESS
Volume 3, Issue 1, Pages 125-136Publisher
OPTICAL SOC AMER
DOI: 10.1364/BOE.3.000125
Keywords
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Funding
- National Institutes of Health from the National Institute of Biomedical Imaging and Bioengineering [R01 EB00763, U54EB007954]
- National Institute of Neurological Disorders and Stroke [R01 NS044345]
- National Heart, Lung and Blood Institute [R41HL10309501]
- Moody Center for Brain and Spinal Cord Injury Research/Mission Connect of UTMB
- Texas Emerging Technology Fund
- UTMB
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There is strong clinical evidence that controlling cerebral venous oxygenation (oxyhemoglobin saturation) is critically important for patients with severe traumatic brain injury as well as for patients undergoing cardiac surgery. However, the only available method for cerebral venous blood oxygenation monitoring is invasive and requires catheterization of the internal jugular vein. We designed and built a novel optoacoustic monitor of cerebral venous oxygenation as measured in the superior sagittal sinus (SSS), the large midline cerebral vein. To the best of our knowledge, optical monitoring of cerebral venous blood oxygenation through overlying extracerebral blood is reported for the first time in this paper. The system was capable of detecting SSS signals in vivo at 700, 800, and 1064 nm through the thick (5-6 mm) sheep skull containing the circulating blood. The high (submillimeter) in-depth resolution of the system provided identification of the SSS peaks in the optoacoustic signals. The SSS peak amplitude closely followed the actual SSS blood oxygenation measured invasively using catheterization, blood sampling, and gold standard CO-Oximetry. Our data indicate the system may provide accurate measurement of the SSS blood oxygenation in patients with extracerebral blood over the SSS. (C) 2011 Optical Society of America
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