Prone Positioning in ARDS: Predicting Neurological Complications Via Cerebral Hemodynamics

Inclusion Criteria: * Age≥18 years * Meet the diagnostic criteria for ARDS(Acute Respiratory Distress Syndrome),with PaO₂/FiO₂\<150 mmHg,and requiring prone ventilation * Expected duration of mechanical ventilation\>48 hours * Written informed consent obtained Exclusion Criteria: * Presence of contraindications to prone positioning(e.g.,head and neck injuries,spinal instability,severe intracranial hypertension) * Severe neurological diseases(e.g.,cerebral hemorrhage,cerebral infarction,intracranial space-occupying lesions)that may affect the monitoring of cerebral hemodynamics * Life-threatening ARDS * Patients who are unable to undergo neurological assessment * Poor image quality or absence of images