Pupil dysfunctions

Nonreactive, midposition pupils

Midbrain damage
Nonreactive, pinpoint pupils

Pons lesion or opiate drug overdose
reactive, small pupils

bilateral injury to thalamus or hypothalamus or metabolic coma
Unilateraly dilated, fixed pupils

compression of oculomotor nerve
nonreactive, dilated pupils

severe anoxia (no o2) or ischemia (atropine and epinephrine)
pupils that are fixed (non-reactive) and dilated are a poor prognostic sign, resulting from a marked increase in ICP. Pt's w/ this problem are sometimes referred to as having?

blown pupils
ominous sign of oculomotor dysfunction. The head is turned but the eyes go the opposite way

Oculocephalic reflex. (Doll's eyes)
Filling syringe with ice cold water and squirting it into the pt't tympanic membrane. If the eye's dont both turn towars the ear that was squirted, they have a dsyfunction with the ?

oculovestibular reflex (caloric). dysfunction of the brainstem (occulomotor)

Author

Gandrews

188302

Card Set

Pupil dysfunctions

Description

Pupil dysfunctions

Updated

2012-12-10T03:38:48Z

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