Difficulty: Medium

Average Score: 68%

A phlebotomist is sending home a stool sample kit with a patient. Which of the following instructions should the phlebotomist provide to the patient?

Rationale

Refrigerate the stool sample after collection.

Stool samples are highly prone to bacterial growth and decomposition if left at room temperature for extended periods. Refrigeration helps preserve the sample's integrity by slowing down bacterial activity and maintaining its suitability for analysis.

A (Avoid urinating in the container.') YOUR ANSWER

Urine contamination would compromise the stool sample's purity and accuracy of any diagnostic testing. However, this particular instruction pertains more to urine sample collection than stool sample handling.

C (Wash the inside and outside of the container before use.') YOUR ANSWER

Preventing external and internal contamination is crucial to ensure the sample's reliability and prevent false results. While cleanliness is essential, this step is typically recommended before collecting the sample, not after its collection.

D (The sample can be brought back to the office within 7 days of collection.') YOUR ANSWER

Timely return of samples is important for maintaining sample integrity and ensuring accurate test results. However, stool samples are perishable and require refrigeration to prevent bacterial overgrowth, making immediate refrigeration after collection a more critical instruction.

Conclusion

For stool sample preservation and accurate diagnostic testing, refrigerating the sample post-collection is a key instruction that the phlebotomist should emphasize to the patient. This practice helps maintain the sample's quality by preventing bacterial growth and decomposition, ensuring reliable test results. Other instructions, such as avoiding urine contamination, washing the container beforehand, and timely sample return, are also important but secondary to the critical step of refrigeration.

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