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Amylase

Results

An amylase test measures the amount of this enzyme in a sample of blood taken from a vein or in a sample of urine. Many conditions can change amylase levels. Your doctor will discuss any significant abnormal results with you in relation to your symptoms and past health.

Results are normally available within 72 hours.

The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.

Normal

Amylase in blood 1
Adults age 60 and younger:

25–125 units per liter (U/L) or 0.4–2.1 microkatals/liter (mckat/L)

Adults older than age 60:

24–151 U/L or 0.4–2.5 mckat/L

Amylase in urine 1
2-hour urine sample:

2–34 U or 16–283 nanokats/hour

24-hour urine sample:

24–408 U or 400–6,800 nanokats/day

Amylase/creatinine clearance ratio 1
Normal:

1%–4% or 0.01–0.04 clearance fraction

High values

Values may be high because of:

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

WebMD Medical Reference from Healthwise

Last Updated: March 08, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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