Difficulty: Medium

Average Score: 59%

Which of the following meets recommended handling requirements for a blood specimen that is to be collected and tested for the presence of bilirubin

Rationale

Protect the collected specimen from sources of bright light.

Bilirubin is a photosensitive compound that can degrade when exposed to bright light, leading to inaccurate test results. Therefore, it is crucial to shield the specimen from light during transport and storage to preserve its integrity for accurate bilirubin measurement.

A (Transport the collected specimen to the laboratory within 30 min) YOUR ANSWER

While timely transport is important for many laboratory tests, for bilirubin specifically, the critical factor is protection from light rather than just the speed of transport. Delays can be acceptable as long as the specimen is adequately shielded from light during transport.

B (Chill the collected specimen in an icy water mixture) YOUR ANSWER

Chilling the specimen is not a recommended practice for bilirubin testing. Instead, the primary concern is light exposure. Although temperature management is important for other analytes, bilirubin testing explicitly requires protection from light rather than chilling the specimen.

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

Using a heating block is inappropriate for bilirubin specimens, as heat can potentially alter the sample's composition and lead to erroneous results. Like chilling, heat is not a necessary requirement for bilirubin handling; the focus should remain on light protection.

D (Protect the collected specimen from sources of bright light) CORRECT

This is the correct handling requirement for bilirubin specimens. Light exposure can lead to the photo-oxidation of bilirubin, resulting in inaccurate test results. Therefore, it is essential to cover the specimen with aluminum foil or place it in a dark container before transport and analysis.

Conclusion

Accurate bilirubin measurement requires careful handling to prevent light exposure, which can degrade the substance. While transport time and temperature management are important for other specimens, they do not apply in the same way for bilirubin. The key to reliable testing lies in the protection of the specimen from bright light, ensuring that the bilirubin levels are accurately assessed.

Related Questions

View all