Question 54

Bilirubin is a photosensitive test that should be protected from light during handling and transportation.

Bilirubin tests require protection from light to prevent degradation of the specimen, ensuring accurate results.

A) Gastrin

Gastrin is not a photosensitive test and does not require light protection during handling or transportation. It is stable under standard laboratory conditions and is not affected by exposure to light.

B) Ammonia

Ammonia testing does not involve photosensitivity; however, it must be handled with care due to its sensitivity to time and temperature. Exposure to light does not compromise ammonia levels, making it unnecessary to protect it from light.

C) Pyruvate

While pyruvate can degrade over time due to factors such as temperature, it is not classified as a photosensitive test. Therefore, it does not require light protection during transportation or handling.

D) Bilirubin

Bilirubin is indeed a photosensitive substance that must be shielded from light to prevent its breakdown. Failure to protect bilirubin samples from light can lead to inaccurate test results due to the alteration of the bilirubin's chemical structure.

Conclusion

Bilirubin is the only option that requires protection from light due to its photosensitivity, which is crucial for obtaining reliable test results. The other options—gastrin, ammonia, and pyruvate—do not have this requirement and can be handled without the need for light protection. This distinction makes option D the definitive correct choice.