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?

Rationale

Chill the sample.

Chilling the lactic acid sample is essential to preserve its stability and prevent any metabolic activity that could alter the concentration of lactic acid. This practice ensures that the sample accurately reflects the patient's lactic acid levels at the time of collection.

A (Chill the sample.) CORRECT

Chilling the sample effectively slows down enzymatic reactions and metabolic processes that could lead to changes in lactic acid levels. This method maintains the integrity of the sample during transportation and processing, making it the most appropriate choice for handling lactic acid.

B (Protect the sample from light.) YOUR ANSWER

While protecting certain samples from light is important to prevent photodegradation, lactic acid is not particularly sensitive to light exposure. Therefore, this method does not address the primary concern of maintaining the sample's stability, making it an inadequate choice for this specific scenario.

C (Attach a heat block to the sample.) YOUR ANSWER

Using a heat block would increase the temperature of the sample, which is counterproductive as it would encourage metabolic activity and potentially increase lactic acid levels. This method would compromise the accuracy of the test results, thus it is not a suitable option.

D (Freeze the sample.) YOUR ANSWER

Freezing the sample could lead to the formation of ice crystals, which may disrupt the cellular structure and affect the analyte concentration. While freezing is a preservation method for some samples, it is not the best practice for lactic acid, making it an incorrect choice in this context.

Conclusion

To ensure the accurate assessment of lactic acid levels, chilling the sample is the most effective method for preserving its integrity during transport and processing. Other options either do not address the primary need for stability or could adversely affect the sample, leading to inaccurate results. Proper handling of lactic acid samples is crucial in clinical settings for reliable diagnostics.

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?

Chill the sample.

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