The nurse tells a patient that he will be performing a visual acuity test using the Snellen eye chart. The patient asks how the test is done. The nurse's best reply is:
"You stand 20 feet away from the chart while I test each of your eyes."
The number beside the largest print read is your visual acuity score!
"I will be testing your vision with your reading glasses on."
"You stand 50 feet away from the chart while I test each of your eyes."
The Correct Answer is A
A. The patient should stand 20 feet away from the Snellen chart to accurately measure visual acuity, which is the standard procedure.
B. The number beside the largest print is not the correct visual acuity score; the patient must read progressively smaller lines.
C. Testing with reading glasses is appropriate only for patients who need them for close-up vision, but the Snellen test typically measures distance vision.
D. The distance should be 20 feet, not 50 feet, to ensure proper testing conditions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Tapping is the first Korotkoff sound and corresponds to the systolic pressure, not the diastolic pressure.
B. Knocking does not describe any Korotkoff sound associated with the blood pressure reading.
C. Silence is typically noted after the muffling sound and indicates the cessation of Korotkoff sounds, which can be used to assess diastolic pressure in adults, but it is not used in children.
D. The muffling sound occurs before the disappearance of Korotkoff sounds and is often used to mark the diastolic pressure in both children and some adults, making it the correct answer.
Correct Answer is A
Explanation
A. Pulse oximetry works by using light absorption to measure the oxygen saturation of hemoglobin in the blood, which typically occurs through the capillary bed in areas like the finger or earlobe.
B. The pulse oximeter does not measure the amount of blood passing through the sensor directly, but rather the oxygen content of the blood.
C. The pulse oximeter does not assess the warmth of the skin as a mechanism for measuring oxygenation.
D. Pulse oximeters measure oxygen saturation levels, not the respiratory rate or blood pressure.
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