Which of the following methods should a phlebotomist use to invert tubes to prevent clotting?
Shaking the tubes 4 to 8 times after collection.
Moving the tubes in a figure-eight motion 4 to 8 times after collection.
Rolling the tubes between the palms of the hands 4 to 8 times after collection.
Passing the tubes from hand to hand 4 to 8 times after collection.
The Correct Answer is C
Choice A Reason:
Shaking the tubes vigorously can cause hemolysis, which is the rupture of red blood cells, leading to inaccurate test results. It is not recommended as it does not provide gentle mixing and can damage the blood cells.
Choice B Reason:
Moving the tubes in a figure-eight motion is not a standard practice for mixing blood samples. This method may not provide the consistent and gentle inversion needed to mix the anticoagulant with the blood effectively.
Choice C Reason:
Rolling the tubes between the palms of the hands 4 to 8 times after collection is the recommended method. This technique allows for gentle and thorough mixing of the blood with the anticoagulant, preventing clotting without causing hemolysis. The number of inversions ensures that the anticoagulant coats the inner surface of the tube and mixes with the blood, which is essential for accurate laboratory results.
Choice D Reason:
Passing the tubes from hand to hand is not an effective method for mixing blood samples. This action may not provide the necessary inversion and can lead to inadequate mixing, resulting in clotted specimens.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A Reason:
Using only one patient identifier is not sufficient to ensure patient safety and accuracy in healthcare settings. It increases the risk of misidentification, which can lead to serious medical errors. Therefore, one identifier is not the standard practice for patient verification before a blood draw.
Choice B Reason:
While two identifiers are commonly used in many healthcare settings as a minimum requirement, they may not always provide enough differentiation, especially in larger facilities where patient names may be similar. Two identifiers are often the minimum standard, but they are not the most comprehensive approach.
Choice C Reason:
Three unique patient identifiers provide a more robust method for verifying a patient's identity, significantly reducing the likelihood of errors. According to the Clinical and Laboratory Standards Institute (CLSI), three identifiers are recommended to ensure the correct patient is being collected. This may include the patient's full name, date of birth, and medical record number or another unique identifier.
Choice D Reason:
While using four unique identifiers could further reduce the risk of patient misidentification, it is not typically required as the standard minimum. Three identifiers are generally considered adequate for most healthcare settings to ensure patient safety and proper identification.
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.
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