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 D
Explanation
A. Human hair: Human hair is not considered potentially infectious material under the Bloodborne Pathogens Standard.
B. Sweat: Sweat is not classified as potentially infectious material because it does not typically contain bloodborne pathogens.
C. Normal saliva: Normal saliva is not classified as potentially infectious material; however, saliva can be considered potentially infectious if it is visibly contaminated with blood.
D. Septic wound: A septic wound contains pus and is considered potentially infectious material because it can contain pathogens.
Correct Answer is A
Explanation
A. Deflate the cuff slowly until the last sound is heard. The diastolic reading is determined when the last sound (Korotkoff sound) is heard as the cuff is deflated.
B. Listen for the first sound through the stethoscope: The first sound corresponds to the systolic reading, not the diastolic.
C. Document the reading when the gauge needle jumps: The gauge needle jump is not a reliable indicator of blood pressure readings.
D. Inflate the cuff to at least 180 mm Hg, deflate the cuff slowly, and listen for the first sound: Inflating to 180 mm Hg is unnecessary and might cause discomfort; also, the first sound is the systolic reading, not the diastolic
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