For the condition below, give the diagnosis and the effect of:
a. 1% hydroxyamphetamine
b. 0.1% adrenaline 
on the affected pupil
 

Patient D A patient with recent neck injury.

Answer
The angiogram shows a dissection of the internal carotid artery with a false aneurysm. This causes a post-ganglionic Horner's syndrome. 
a. 1% hydroxyamphetamine will not dilate the pupil.
b. 0.1% adrenaline will dilate the pupil

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