3. A phlebotomist has collected a lactic acid sample and needs to prepare the sample for processing and transportation. Which of the following methods is correct?
Answer: A
Chill the sample.
Chilling the lactic acid sample is essential for preserving its integrity before processing and transportation. This method helps to prevent any metabolic processes that could alter the results of the test.
A) Chill the sample.
Chilling the sample is the correct method for preparing a lactic acid sample. This practice minimizes the risk of lactic acid levels increasing due to cellular metabolism, thereby ensuring accurate test results.
B) Protect the sample from light.
While protecting samples from light is important for certain tests, it is not relevant for lactic acid samples. Light exposure does not significantly affect lactic acid levels, making this option incorrect.
C) Attach a heat block to the sample.
Attaching a heat block to the sample would not be appropriate as it could raise the temperature, potentially increasing lactic acid levels due to continued cellular activity. This method is therefore incorrect for lactic acid sample preparation.
D) Freeze the sample.
Freezing the sample is not recommended for lactic acid testing because it can lead to changes in the sample's composition and may affect the accuracy of the results. This option is incorrect as well.
Conclusion
Chilling the sample is the only method that effectively preserves the integrity of lactic acid levels for accurate testing. Other options either do not apply to lactic acid testing or could lead to erroneous results, rendering them unsuitable for this specific context. Thus, the correct answer is clearly justified.