Does a bilirubin sample need to be protected from light?

Does a bilirubin sample need to be protected from light?

• A. Yes
• B. No
• C. Only if it's more than 24 hours old
• D. Depends on the type of bilirubin

Answer: (A)

A bilirubin sample should indeed be protected from light to ensure the accuracy of test results. Bilirubin, particularly unconjugated bilirubin, is photosensitive. Exposure to light can lead to the breakdown of bilirubin, resulting in decreased levels when the sample is tested. This degradation can lead to erroneous laboratory results, potentially causing misdiagnosis and inappropriate treatment for conditions such as jaundice or liver disease.

Maintaining samples in the dark until testing can prevent this photodegradation, thereby helping to ensure that the values measured reflect the patient's actual bilirubin levels. This is why it is critical to take precautions to shield bilirubin samples from light at all times prior to analysis.