Which of the following is caused by excessive shaking of a tube?
Hemophilia
Hemoconcentration
Hemolysis
Hemostasis
The Correct Answer is C
Choice A Reason:
Hemophilia is a genetic disorder that impairs the body's ability to make blood clots, a process needed to stop bleeding. This condition is not caused by shaking a blood collection tube; it is an inherited disorder typically caused by a mutation in one of the clotting factor genes.
Choice B Reason:
Hemoconcentration refers to an increase in the concentration of cells and solids in the blood, usually resulting from a loss of plasma. While this can occur due to various reasons, such as dehydration, it is not caused by shaking a blood collection tube. Shaking a tube does not change the ratio of cells to plasma in the blood.
Choice C Reason:
Hemolysis is the rupture of red blood cells, which can occur when a blood sample is handled roughly, such as by excessive shaking. This can cause the cells to break open and release their contents into the plasma, which can interfere with laboratory tests and lead to inaccurate results.
Choice D Reason:
Hemostasis is the process by which the body stops bleeding, which involves the clotting of blood. This process is not caused by shaking a blood collection tube. Hemostasis is a complex process that involves blood vessels, platelets, and clotting factors.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A Reason:
Stopping the procedure is the first and most critical action a phlebotomist should take if a patient slumps over during blood collection. The patient's safety is the primary concern, and continuing the procedure could cause further harm. The phlebotomist should immediately remove any needles or equipment from the patient to prevent injury.
Choice B Reason:
Alerting the supervisor is an important step, but it should come after ensuring the patient is safe and the procedure has been stopped. The supervisor will need to be informed of the incident to help manage the situation and provide assistance as needed.
Choice C Reason:
Documenting the incident is a necessary step for legal and medical records. However, it is not the first action to take. The patient's immediate well-being takes precedence over documentation, which can be completed after the situation is under control and the patient is stable.
Choice D Reason:
Sliding the patient to the floor may be necessary if the patient is at risk of falling from the chair. However, this should only be done after the procedure has been stopped, and if it is safe to move the patient. If the patient is unconscious, the phlebotomist may need to initiate CPR, which is best performed on a flat surface.
Correct Answer is A
Explanation
Choice A Reason:
Taking the specimen temperature before 4 minutes is the correct procedure according to the Department of Transportation (DOT) guidelines. The DOT Rule 49 CFR Part 40 Section 40.65 states that the temperature of the specimen must be checked no later than four minutes after the employee has given the specimen. The acceptable temperature range is 32–38 °C/90–100 °F, which helps to verify the validity of the specimen.
Choice B Reason:
Taking the specimen temperature at 5 minutes is not within the DOT guidelines. The temperature must be taken before 4 minutes have passed to ensure the specimen's integrity and to comply with the regulatory requirements.
Choice C Reason:
At 15 minutes, the temperature check would be too late. The DOT guidelines specify that the temperature should be checked no later than four minutes after collection to ensure the specimen has not been tampered with and is within the acceptable temperature range.
Choice D Reason:
After 30 minutes, the temperature of the urine specimen would not reflect the body temperature at the time of collection, which is necessary for the validity of the test. This delay could allow for the temperature to fall outside of the acceptable range, potentially invalidating the specimen.
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