Question 40

The use of an outdated tube may lead to the rejection of the specimen.

Using an outdated tube can compromise the integrity of the sample, leading to potential rejection by the laboratory due to concerns about the reliability of test results.

A) Allergic reaction from patient

While allergic reactions can occur from various medical procedures, they are not directly related to the use of an outdated tube. The materials used in the tube are stable within their expiration dates, and usage beyond that date is more likely to affect the sample quality rather than cause allergic reactions.

B) Rejection of specimen

The rejection of the specimen is a likely outcome when an outdated tube is used. Laboratories have strict protocols regarding sample integrity, and using tubes past their expiration date can lead to erroneous results or contamination, prompting rejection to ensure accurate testing.

C) Inadequate clotting at puncture site

Inadequate clotting at the puncture site is typically related to the patient's physiological response or the technique used rather than the age of the tube. Therefore, this option does not directly correlate with the issue of using an outdated tube.

D) Contamination of sample

Although contamination can occur at any stage of sample collection, it is not a direct consequence of using an outdated tube. Contamination is more often related to handling and environmental factors rather than the tube's expiration status, making this option less relevant in the context of the question.

Conclusion

The rejection of the specimen is the most appropriate outcome when using an outdated tube, as it directly impacts the validity of laboratory results. Other options, while plausible in different contexts, do not specifically relate to the implications of using an expired tube, highlighting that option B is the most accurate response.