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. A high CVP, not a low CVP, is typically associated with fluid overload.
B. A low CVP indicates decreased fluid volume, which is characteristic of hypovolemia. This is particularly relevant to a patient with multiple traumas who may have significant blood loss.
C. While left ventricular failure can contribute to hemodynamic instability, it's not directly correlated with a low CVP.
D. This would affect the oxygenation status of the blood, rather than the overall blood volume and CVP.
Correct Answer is C
Explanation
A. amiodarone is a medication used to treat ventricular fibrillation administered after defibrillation.
B. Epinephrine is also used in cardiac arrest, but it is administered after unsuccessful defibrillation attempts.
C. Defibrillation is the immediate life-saving intervention for ventricular fibrillation. It delivers a high- energy shock to the heart to try to restore normal rhythm.
D. While important in cardiac arrest, it is not the immediate priority. Defibrillation takes precedence.
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