Question 13

Protect the collected specimen from sources of bright light

To accurately test for the presence of bilirubin, the collected specimen must be protected from bright light, as exposure can lead to the degradation of bilirubin and inaccurate results.

A) Transport the collected specimen to the laboratory within 30 min

While timely transport is important for many laboratory tests, it is not specifically a requirement for bilirubin specimens. The key factor in bilirubin testing is protecting the specimen from light rather than the speed of transport.

B) Chill the collected specimen in an icy water mixture

Chilling the specimen is not a recommended handling requirement for bilirubin testing. In fact, chilling can interfere with bilirubin levels, making this option incorrect regarding best practices for handling bilirubin specimens.

C) Keep the collected specimen in contact with a heating block

Keeping the specimen in contact with a heating block is inappropriate as heat can cause the breakdown of bilirubin. This option is incorrect as it contradicts the necessary conditions for preserving the integrity of the bilirubin in the specimen.

D) Protect the collected specimen from sources of bright light

This option is correct because bilirubin is light-sensitive and can degrade when exposed to bright light. Proper protection from light ensures accurate measurement of bilirubin levels in the specimen.

Conclusion

The correct handling of a blood specimen for bilirubin testing requires protection from bright light to prevent degradation of the bilirubin. Options A, B, and C fail to address the specific needs of bilirubin preservation, while option D directly aligns with the necessary protocols to ensure accurate test results. Therefore, option D is definitively the correct choice.