In ACLS, what is the purpose of the Disability step?

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The main idea tested is evaluating neurologic status and level of consciousness during resuscitation. In ACLS, the Disability step focuses on quickly gauging brain function to detect problems such as altered mental status from neurological injury, stroke, metabolic disturbances like hypoglycemia, or drug effects that require urgent attention. This is typically done with a rapid mental-status check (using AVPU or a Glasgow Coma Scale), assessment of pupil size and reactivity, and a quick check of motor responses to stimuli. If the patient is not fully alert, a bedside glucose check is often performed because low blood sugar can cause or worsen unconsciousness and needs immediate treatment. The findings guide crucial next actions: securing or protecting the airway if consciousness is reduced, prioritizing interventions or imaging for suspected stroke, and administering dextrose if hypoglycemia is present. This step focuses on brain function and its implications for resuscitation, rather than on external bleeding control, routine vital-sign recording, or analgesia.