A nurse is assessing a client in the emergency department when it is noted the left pupil is enlarged and fixed while the right pupil constricts to 2mm when exposed to light. Which of the following is a possible cause of unequal pupil sizing?
Normal variation in pupil size
Age-related changes
Ocular trauma
Excessive light exposure
The Correct Answer is C
A. There can be slight variations in pupil size but the difference described (one pupil enlarged and fixed, the other constricted and reactive to light) is not considered normal.
B. Age-related changes in pupil size typically involve a gradual decrease in pupil size, not a sudden and dramatic difference between the two eyes.
C. Unequal pupil size, especially when one pupil is fixed and dilated, is a classic sign of increased intracranial pressure (ICP), often caused by head trauma.
D. Exposure to light would cause both pupils to constrict, not one to dilate and fix.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Pupils round, 2mm and constricting to light is a normal pupil response.
B. Decreasing level of consciousness is a critical sign of deteriorating neurological status and requires immediate medical intervention.
C. Temporal headache is a common symptom after head injury but it is not as urgent as a decreasing level of consciousness.
D. Glasgow coma score of 13 indicates a mild to moderate head injury, but it's a static measurement. A decreasing level of consciousness would indicate worsening condition.
Correct Answer is A
Explanation
A. Lorazepam is a benzodiazepine used as the first-line treatment for status epilepticus. It rapidly terminates seizures.
B. A beta-blocker, atenolol is used for conditions like hypertension and angina, not for seizures.
C. While phenytoin is an anti-seizure medication, it has a slower onset of action compared to lorazepam. It's used as a second-line agent in status epilepticus.
D. Levetiracetam is an anti-epileptic drug, but not the first choice for acute seizure management like status epilepticus.
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