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The increase in amplitude of fluctuations of cerebral hemoglobin concentration in respiratory band related to increase in intra-abdominal pressure

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Abstract

We present results of clinical studies in patients during increase in intra-abdominal pressure (IAP). Changes in brain hemoglobin concentration assessed from time-resolved near-infrared spectroscopy system were analyzed in frequency domain. The amplitude of power spectral density in respiratory band increases while IAP increases what is related to reduced venous outflow.

© 2019 SPIE/OSA

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