Impaired cerebral vasoreactivity may cause cerebral blood volume dip following obstructive sleep apnea termination

Near-infrared spectroscopy (NIRS) is a non-invasive technique for estimating cortical concentration changes of oxy(Δ[HbO2]), deoxy(Δ[HbR]), and total (Δ[HbT]=Δ[HbO2] +Δ[HbR]) hemoglobin [1, 2]. Cortical Δ[HbT] is commonly used as an indicator of cerebral blood volume (CBV) changes. Obstructive sleep apnea (OSA) is characterized by apneas (pause in breathing… CONTINUE READING