A medical assistant needs to collect four tubes during a blood draw. Which of the following tubes should be filled last?
Yellow
Light blue
Red
Gray
The Correct Answer is D
A. Yellow: The yellow tube, used for blood cultures, is typically collected first to prevent contamination.
B. Light blue: The light blue tube is used for coagulation studies and should be collected before tubes containing additives that could interfere with coagulation tests.
C. Red: The red tube, which may contain no additives or a clot activator, is usually collected after the light blue tube.
D. Gray: The gray tube is used for glucose testing and should be filled last as it contains additives that could interfere with other tests if collected earlier.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Measuring capillary hematocrit: Measuring capillary hematocrit is within the scope of practice for medical assistants.
B. Obtaining a throat culture: Obtaining a throat culture is a common task for medical assistants.
C. Performing a fecal occult blood test: Performing a fecal occult blood test is within the medical assistant’s scope of practice.
D. Interpreting microscopic preparation of urine: Interpreting the results of a microscopic urine preparation typically requires a higher level of training and is often performed by a lab technician or other specialized personnel.
Correct Answer is D
Explanation
A. Cotton balls: Cotton balls are not required for the autoclave process and do not aid in sterilization.
B. Masking tape: Masking tape is not used in the autoclave process; it does not contribute to the sterilization of instruments.
C. Tap water: Tap water is not recommended for use in autoclaves; distilled or deionized water is preferred to avoid mineral deposits.
D. Sterilization indicators: Sterilization indicators (such as indicator strips or tape) are used to confirm that the autoclave has reached the necessary temperature and pressure for effective sterilization.
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