Properties of end-expiratory breath hold responses measured with near-infrared spectroscopy

Jaakko Virtanen; Tommi Noponen; Risto J. Ilmoniemi

doi:10.1117/12.873743

17 February 2011 Properties of end-expiratory breath hold responses measured with near-infrared spectroscopy

Jaakko Virtanen, Tommi Noponen, Risto J. Ilmoniemi

Author Affiliations +

Proceedings Volume 7896, Optical Tomography and Spectroscopy of Tissue IX; 78960D (2011) https://doi.org/10.1117/12.873743
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

Near-infrared spectroscopy (NIRS) can be used to assess the cerebrovascular response to breath hold. We measured eight healthy subjects during voluntary end-expiratory breath hold to study inter- and intraindividual variability of the deoxy- (HbR) and oxyhemoglobin (HbO₂) response curves for the scalp and cerebral cortex. Although cortical [HbO₂] behaves qualitatively similarly in all subjects, there is large inter- and intraindividual variability, and in the case of [HbR] also qualitative variability. However, the linearity of [HbO₂] increase during the breath hold has encouraging measurement repeatability, and it may even indicate an individual's CO₂ tolerance. This result may help understand why breath hold duration varies between subjects more than the total [HbO₂] increase during breath hold.

Citation Download Citation

Jaakko Virtanen, Tommi Noponen, and Risto J. Ilmoniemi "Properties of end-expiratory breath hold responses measured with near-infrared spectroscopy", Proc. SPIE 7896, Optical Tomography and Spectroscopy of Tissue IX, 78960D (17 February 2011); https://doi.org/10.1117/12.873743

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