In brain death assessment, how long must no eye movement be observed?

In brain death assessment, how long must no eye movement be observed?

• A. 2 minutes
• B. 1 minute
• C. 30 seconds
• D. 5 minutes

Answer: (B)

Eye movements are controlled by the brainstem, so testing the oculocephalic reflex (watching for eye movement when the head is rotated) helps determine brainstem integrity. If the eyes do not move in response to head turning for a full minute, the reflex is considered absent. This one-minute observation period reduces the chance that transient or incidental movements are mistaken for a preserved reflex, supporting the assessment of brain death when all other criteria are also satisfied. Always ensure there are no confounding factors such as sedation, neuromuscular blockers, or unstable physiology that could mask reflexes.

Eye movements are controlled by the brainstem, so testing the oculocephalic reflex (watching for eye movement when the head is rotated) helps determine brainstem integrity. If the eyes do not move in response to head turning for a full minute, the reflex is considered absent. This one-minute observation period reduces the chance that transient or incidental movements are mistaken for a preserved reflex, supporting the assessment of brain death when all other criteria are also satisfied. Always ensure there are no confounding factors such as sedation, neuromuscular blockers, or unstable physiology that could mask reflexes.