When measuring distance visual acuity, the medical assistant should instruct the patient to do which of the following?
Stand 25 feet from the Snellen chart.
Allow them to squint if necessary.
Keep both eyes open while using the occluder.
Start with the bottom line of the Snellen chart and work upward.
The Correct Answer is C
A. Stand 25 feet from the Snellen chart. The standard distance for testing visual acuity with a Snellen chart is 20 feet, not 25 feet. Testing at 25 feet would not provide accurate results.
B. Allow them to squint if necessary. Squinting can artificially improve vision, leading to inaccurate results. The patient should be instructed to avoid squinting during the test.
C. Keep both eyes open while using the occluder. The patient should use the occluder to cover one eye but keep both eyes open during the test. This ensures that each eye is tested individually without any pressure or distortion from closing the other eye.
D. Start with the bottom line of the Snellen chart and work upward. The patient should start from the top of the Snellen chart and work downward. Starting from the bottom would likely result in frustration and inaccurate assessment as the lines become increasingly difficult.
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Correct Answer is B
Explanation
A. Prone: The prone position (lying face down) is not suitable for venipuncture or for patients at risk of syncope.
B. Trendelenburg: The Trendelenburg position (lying flat with the legs elevated) can help prevent syncope by increasing venous return to the heart and improving blood flow to the brain.
C. Supine: While the supine position (lying flat on the back) is appropriate for venipuncture, the Trendelenburg position is preferred for patients with a history of syncope.
D. Fowler's: The Fowler's position (sitting or semi-sitting) is not suitable for preventing syncope during blood draws.
Correct Answer is B
Explanation
A. Antibiotics: Antibiotics are not controlled substances and do not require a DEA number for prescription.
B. Opioids: Opioids are controlled substances and require a DEA number for prescription due to their potential for abuse and dependence.
C. Antimycotic: Antimycotic drugs, used to treat fungal infections, are not controlled substances and do not require a DEA number.
D. Cathartics: Cathartics, used to induce bowel movements, are not controlled substances and do not require a DEA number.