Which of the following parameters should a phlebotomist consider when selecting a blood collection method?
Patient condition, patient age, blood volume required
Patient height, patient gender, patient medications
Ordering physician, number of tests ordered, diagnosis
Time of day, timing of specimen, test status
The Correct Answer is A
Choice A Reason:
The patient's condition is a critical factor as it can influence the ease of blood collection and the choice of collection site. For example, a dehydrated patient may have less accessible veins. Patient age is also important; pediatric and geriatric patients may require different approaches due to vein size and fragility. The blood volume required for testing must be considered to ensure sufficient sample size without compromising patient safety, adhering to guidelines that limit blood collection to a certain percentage of the patient's total blood volume.
Choice B Reason:
While patient height and gender may influence the choice of blood collection site, they are not as critical as the factors listed in choice A. Patient medications are important to consider, as some medications may affect coagulation or the integrity of the sample.
Choice C Reason:
The ordering physician's preferences may be considered, but they are not a primary factor in the method of collection. The number of tests ordered and the diagnosis can influence the volume of blood needed but are secondary to the patient's condition and safety considerations.
Choice D Reason:
The time of day and the timing of the specimen collection can be important for certain tests that are time-sensitive or influenced by diurnal variations. The test status, whether routine or stat, may affect the urgency of collection but not necessarily the method of collection.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A Reason:
Encouraging the patient to chew gum during the procedure may serve as a distraction, which can be helpful for some patients. However, this is not a widely recommended practice for reducing needle phobia. Distraction techniques can be beneficial, but they should be tailored to the individual patient's preferences and should not interfere with the procedure.
Choice B Reason:
Instructing the patient to lie supine during the procedure can help prevent fainting and reduce anxiety for some patients. This position is often used for patients who have a history of fainting or feel dizzy during blood draws. However, it is not specifically targeted at managing needle phobia.
Choice C Reason:
Placing the patient's elbow joint at 90 degrees of flexion is a standard practice to stabilize the arm and provide an optimal angle for venipuncture. While this is a necessary step in the procedure, it does not directly address the patient's needle phobia.
Choice D Reason:
Warming the site for 10 minutes before venipuncture is a technique used to enhance vein visibility and elasticity, making the venipuncture easier and potentially less painful. This can be particularly helpful for patients with needle phobia, as a smoother and quicker procedure may reduce anxiety and discomfort.
Correct Answer is C
Explanation
Choice A Reason:
Signing a release for laboratory results is a form of expressed consent, not implied consent. Expressed consent is given explicitly, either orally or in writing, and is clearly and unmistakably communicated.
Choice B Reason:
Similarly, signing a document of agreement for a research study is another example of expressed consent. The patient is actively agreeing to participate in the study, which is a direct and informed action.
Choice C Reason:
Implied consent occurs when a patient's actions suggest consent without verbal or written confirmation. Offering an arm to a phlebotomist is a non-verbal communication that implies the patient is willing to have their blood drawn. This is a common practice in medical settings where the action of presenting an arm indicates readiness for the procedure.
Choice D Reason:
A family member nodding for a phlebotomist to proceed does not constitute the patient's implied consent. Consent must come directly from the patient unless they are unable to provide it, in which case a legal surrogate may give consent on their behalf.
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