Cerebrovascular Hemodynamics in Patients With ARDS.

"Cerebral autoregulation is assessed using a software that calculates correlation coefficients based on the values of cerebral oxygenation (detected by near-infrared spectroscopy) and invasively measured arterial blood pressure.~Correlation coefficients are calculated at 10-second intervals and averaged over a period of 300 seconds, resulting in an autoregulation index (cerebral oxygenation index, COx). The index can range between -1 and +1. It provides information about cerebral autoregulation capacity, with a value below 0.3 indicating intact cerebral autoregulation."