■ Respiratory pattern
If regular, may be normal or hyperventilation. If irregular, usually Cheyne-Stokes
Irregular, especially Cheyne-Stokes or ataxic breathing
■ Pupillary size and reaction
Equal, reactive to light, li pinpoint from opiates or cholinergics, you may need a magnifying glass to see the reaction.
LTnequal or unreactive to light (fixed)
Midposition, fixed—suggests midbrain compression
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