When Amylase (AMY) is ordered on a specimen, which factor could cause a false result?

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Interference from the specimen itself can distort amylase readings. Many amylase tests use a colorimetric/photometric method to track enzymatic activity, and a lipemic (high triglyceride) sample becomes turbid. That turbidity scatters light and creates background that interferes with the optical measurement, leading to an inaccurate result. This effect is a well-recognized cause of false readings in amylase testing, since the lipids distort the signal the assay relies on.

Hemolysis can affect some tests, but it’s not the most consistent source of interference for standard amylase measurements. Prolonged fist clenching can raise salivary amylase and potentially contaminate the serum sample, but properly collected specimens aim to avoid this, and the lipemic interference is the clearer, more direct factor here. Low protein doesn’t typically alter amylase measurement in the same way.