Which of the following actions should a medical assistant take to properly process a blood specimen?
Add thixotropic gel to the tube after venipuncture.
Place the tubes in the centrifuge to chill after venipuncture to separate blood cells.
Invert additive tubes multiple times after filling the tube.
Mix the anticoagulant in the tube after filling the tube.
The Correct Answer is C
A. Add thixotropic gel to the tube after venipuncture: Thixotropic gel is used in specific tubes for separating serum or plasma from blood cells and should be added during the manufacturing process, not after venipuncture.
B. Place the tubes in the centrifuge to chill after venipuncture to separate blood cells: Tubes should not be chilled before centrifugation unless specified by the test requirements. Most tubes are centrifuged at room temperature.
C. Invert additive tubes multiple times after filling the tube: Inverting additive tubes multiple times ensures proper mixing of the additive with the blood, which is crucial for accurate test results.
D. Mix the anticoagulant in the tube after filling the tube: The anticoagulant should be mixed by inverting the tube immediately after filling it, not after the fact.
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Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
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.
Correct Answer is B
Explanation
A. Obtaining a tympanic reading: This procedure does not typically require gloves as it is non-invasive and does not involve contact with bodily fluids.
B. Administering a nebulizer treatment: Gloves should be worn during this procedure to maintain hygiene and prevent exposure to respiratory secretions.
C. Performing a visual acuity test: This test is non-invasive and does not require gloves.
D. Removing a cyst: This procedure typically requires more than gloves; it involves aseptic technique and potentially sterile equipment. Gloves are part of the preparation but are not sufficient on their own.
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