Fibrinogen-to-Albumin Ratio as a Predictor of Acute Respiratory Distress Syndrome in Traumatic Brain Injury

Inclusion Criteria: * Patients ≥ 18 years admitted to the ICU with traumatic Brain Injury * Admission to the ICU within 24 hours of injury. * Patients will be expected to remain under hospital care for follow-up * Availability of fibrinogen and albumin measurements within the first 24 hours of ICU admission. * Informed consent will be obtained from a legally authorized representative. Exclusion Criteria: * Preexisting advanced chronic liver disease, nephrotic syndrome, or protein-losing enteropathy. * Pre-existing ARDS on admission. * Recipient of albumin, fibrinogen concentrate, or cryoprecipitate before admission sampling. * Use of anticoagulant or fibrinolytic therapy before admission. * Active malignancy or severe systemic infection at admission. * Direct sever lung injury * Pregnancy * Refusal of consent