COVID-19(8) reduce(6) patients with COVID-19(6) pandemic(6) recent(6) Coronavirus disease 2019(5) SARS-CoV-2(5) acute respiratory distress syndrome(5) Frontal(4) edema(4) marker(4) Oxygenation(4) epileptic(4) invasive(4) oxygen(4) transcranial Doppler(4) Hypoxemia(4) Neurological complications(4) Neurological complication(4) emboli(4) Doppler(4) coronavirus disease(4) Pupillometry(4) Brain(4) large vessel(4) Encephalopathy(4) Evidence(4) intracranial pressure(4) parameter(4) treating(4)