Causes of Altered Level of Consciousness GCS < 7 - Differential Diagnosis Algorithm
Brain Involvement - Hemispheric
• Hemorrhage
• Traumatic
• Ischemia/Infarction
• Neoplastic Abscess
• Skull fracture
• Subdural hematoma
• Intracranial Bleeding
Brain Involvement - Brain Stem
• Hemorrhage
• Traumatic
• Ischemia / Infarction
• Neoplastic Abscess
• Herniation
• Brain stem Lesion
Brain Involvement - Vascular
• Hypertensive encephalopathy
• Vasculitis
• TTP
• DIC
• Hypoxemia
• Multiple emboli
Brain Involvement - Infection
• Meningitis
• Encephalitis
Brain Involvement - Other
• Trauma / Concussion
• Post-ictal
Systemic - Excesses
• Liver/Renal Failure
• Carbon Dioxide Narcosis
• Metabolic Acidosis
• Hypernatremia
• Hypercalcemia
• Hypermagnesemia
• Hyperthermia
• Thyroid Storm
Systemic - Deficiencies
• Hypoxemia
• Hypoglycemia
• B12/Thiamine deficiency
• Hyponatremia
• Hypocalcemia
• Hypomagnesemia
• Hypothermia
• Myxedema Coma
Systemic - Drugs/Toxins
• Alcohols
• Barbituates
• Tranquilizers
• Other
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