Which of the following is a phlebotomist required to document on a CBC specimen label?
Patient's insurance provider name
Phlebotomist's full name
Phlebotomist's certification number
Patient's identification number
The Correct Answer is D
Choice A reason:
The patient's insurance provider name is not typically required on a CBC specimen label. While insurance information is crucial for billing purposes, it does not serve as an identifier for the specimen itself and is therefore not documented on the label.
Choice B reason:
The phlebotomist's full name is not a requirement for a CBC specimen label. The focus of documentation on the label is on patient identification and specimen integrity, not the identity of the healthcare professional collecting the specimen.
Choice C reason:
A phlebotomist's certification number is also not required on a CBC specimen label. While the phlebotomist's credentials are important for their professional status, they are not part of the necessary documentation for a specimen label.
Choice D reason:
The patient's identification number is a critical piece of information that must be documented on a CBC specimen label. This unique identifier links the specimen to the patient's medical record, ensuring that the test results are accurately recorded in the patient's health history.
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Correct Answer is A
Explanation
Choice A reason:
Chilling the sample is the correct method for preparing a lactic acid sample for processing and transportation. Lactic acid levels can continue to change after the blood is drawn due to ongoing cellular metabolism. Chilling the sample slows down this metabolism, preserving the accuracy of the lactic acid measurement. The sample should be placed on ice or in a refrigerated environment as soon as possible after collection.
Choice B reason:
While protecting the sample from light is important for some types of specimens, it is not the primary concern for lactic acid samples. The key factor for lactic acid stability is temperature control, not light exposure. Therefore, while it may be beneficial to keep the sample out of direct sunlight, chilling it is the priority to prevent changes in lactic acid levels.
Choice C reason:
Attaching a heat block to the sample is not a recommended method for lactic acid samples. Heat can increase metabolic activity, potentially altering the lactic acid levels in the sample. This would lead to inaccurate results, as the goal is to preserve the state of the sample at the time of collection.
Choice D reason:
Freezing the sample is not typically recommended for immediate processing and transportation of a lactic acid sample. While freezing can preserve certain types of specimens for long-term storage, it is not necessary for short-term transport and can cause issues such as hemolysis, which may interfere with the test results.
Correct Answer is A
Explanation
Choice A reason:
The standard recommendation for fasting before a blood specimen collection is typically between 8 to 12 hours¹²³. This duration is considered sufficient to ensure that food intake does not affect the blood test results, such as glucose or lipid levels.
Choice B reason:
A fasting period of 1 to 2 hours is too short and would not provide an accurate representation of the body's baseline levels for most tests that require fasting. It is important for certain levels, like blood sugar and lipids, to stabilize, which takes longer than 1 to 2 hours.
Choice C reason:
Fasting for 4 to 6 hours may be appropriate for some tests, but it is not the standard fasting duration for most blood tests that require fasting. The shorter time might not allow for the clearance of lipids and glucose from the bloodstream that can influence the test outcomes.
Choice D reason:
A 24-hour fast is generally not required for routine fasting blood tests and could be potentially harmful, as it may lead to hypoglycemia, especially in diabetic patients or those with metabolic disorders. It is excessive for the purposes of standard blood tests.
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