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 A
Explanation
A. Ensure the skin is clean and dry. This is the correct action. Sweating can interfere with electrode adhesion and signal quality, so the skin should be cleaned and dried to ensure a good contact for accurate EKG readings.
B. Apply conductive gel to the patient's chest. Conductive gel is typically used with certain types of electrodes, but in the case of disposable adhesive EKG electrodes, it is not necessary and may not improve tracing quality.
C. Shave the electrode sites. Shaving may be necessary if the patient has a lot of body hair, but it is not the first step when dealing with sweating. Drying the skin is more immediate and essential.
D. Place the electrodes below the clavicle. Electrode placement should follow standard EKG guidelines, and moving them to non-standard positions like below the clavicle can result in inaccurate readings.
Correct Answer is B
Explanation
A. Safety data sheet (SDS): SDS provides information on handling and disposing of hazardous materials, not specifically on infection control or disease prevention.
B. Standard precautions: Standard precautions are infection control practices used to prevent the spread of disease in healthcare settings, such as hand hygiene and using personal protective equipment.
C. CLIA: CLIA (Clinical Laboratory Improvement Amendments) regulates laboratory testing but does not specifically address disease prevention in patient interactions.
D. Exposure plan: An exposure plan is related to handling and reporting exposure to bloodborne pathogens, not general disease prevention.
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