A Novel Portable and Wearable Broadband Near-Infrared Spectroscopy Device for In-Vivo Oxygenation and Metabolism Measurements

Broadband NIRS (bNIRS) is an extension of fNIRS that provides the same assessment of oxygenation biomarkers along with a valuable marker for oxygen metabolism at a cellular level, the oxidation state of cytochrome-c-oxidase (oxCCO). bNIRS implements many (100s) NIR wavelengths in the full NIR spectr...

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Published inarXiv.org
Main Authors Talati, Musa, Lange, Frederic, Airantzis, Dimitrios, Chitnis, Danial, Illukwe, Temisan, Gopal, Darshana, Pinti, Paola, Ranaei-Zamani, Niccole, Kowobari, Olayinka, Hillman, Sara, Siassakos, Dimitrios, David, Anna, Mitra, Subhabrata, Tachtsidis, Ilias
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 05.07.2024
Subjects
Biomarkers
Broadband
Deoxygenation
Infrared spectra
Metabolism
Near infrared radiation
Occlusion
Oxidation
Oxygen metabolism
Oxygenation
Portable equipment
Spectrometers
Valence
Wavelengths
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Summary:Broadband NIRS (bNIRS) is an extension of fNIRS that provides the same assessment of oxygenation biomarkers along with a valuable marker for oxygen metabolism at a cellular level, the oxidation state of cytochrome-c-oxidase (oxCCO). bNIRS implements many (100s) NIR wavelengths in the full NIR spectrum to address this and provide insight to tissue energetics. To supply these many wavelengths of light, broadband sources are required, and spectrometers are employed to distinguish power per wavelength. Current multi-channel bNIRS instruments are bulky and only semi-portable due to technological limitations. We propose a design for a bNIRS device that has been miniaturized to allow for portable use. This design leverages the innovations in photonic devices that have created a new line of microspectrometers and broadband NIR high-power LEDs; the Hamamatsu SMD-type spectrometer C14384MA and the Ushio SMBBIR45-1100 LED. This first-of-itskind device, referred to as microCYRIL (after its two predecessors CYRIL and miniCYRIL), has been developed for oxygenation and metabolism measurements with dual channel operation. To verify functionality, concentration changes in oxygenated (HbO2) and deoxygenated (HHb) haemoglobin and oxCCO were successfully tracked during a cuff-induced venous and arterial occlusion.
ISSN:2331-8422