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| horner_syndrome_and_cocaine [2016/05/17 23:31] – Scott Larson | horner_syndrome_and_cocaine [2025/04/18 20:40] (current) – external edit 127.0.0.1 | ||
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| + | ====== Horner syndrome and Cocaine ====== | ||
| + | ====Action of Cocaine==== | ||
| + | Cocaine blocks reuptake of norepinepherine that is normally released from nerve endings. | ||
| + | In a sympathetic lesion, norepinepherine is not released. | ||
| + | |||
| + | ====Effects of Cocaine on Horner' | ||
| + | little or no effect | ||
| + | ====Effects of Cocaine on Normal pupil==== | ||
| + | dilation | ||
| + | ====Test procedure==== | ||
| + | * Place not more than 2 drops of cocaine hydrochloride 10% in both eyes (2% for infants and children,4% and 5% can also work for adults) | ||
| + | * Measure anisocoria 50-60 minutes later | ||
| + | * 0.8 mm or greater anisocoria after the cocaine is highly suggestive of Horner syndrome | ||
| + | ====False Positive result==== | ||
| + | pupil held by membrane, scar or aberrant innervation// | ||
| + | [[cocaine_and_amphetamine_in_horner_syndrome|Image]] | ||
| + | {{tag> | ||