UREA

About Test

The Urea assay measures the concentration of urea, a waste product formed in the liver as a result of protein metabolism, in the blood. This test plays a vital role in evaluating kidney function and assessing hydration levels. The kidneys filter urea from the bloodstream, making this test essential in diagnosing kidney diseases and monitoring their progression. Individuals with conditions like chronic kidney disease or dehydration often undergo this test. Elevated levels may indicate kidney dysfunction or dehydration, while low levels could suggest liver disease or malnutrition.

Sample Requirements

Gold SST Tube

Stability

Serum: 7 days 4-25°C

Turnaround Time

4 hours

Gold SST Tube

Assay Interferences

Interferences (<10% up to)

Ammonium: 300 μg/dL 11.2mg/dL, 300 μg/dL 30.7 mg/dL

Ascorbic acid: 60 mg/dL 11.3 mg/dL, 60 mg/dL 29.2 mg/dL

Bilirubin (conjugated): 60 mg/dL 11.3 mg/dL, 60 mg/dL 30.8 mg/dL

Bilirubin (unconjugated): 60 mg/dL 11.5 mg/dL, 60 mg/dL 31.0 mg/dL

Hemoglobin: 900 mg/dL 11.4 mg/dL, 900 mg/dL 29.4 mg/dL

Reference Range (mmol/L):

<1 year: 0.8 – 5.5 1 / 15 years: 2.5 -6.5 / >15 years: 2.5 - 7.8

Critical Value:

If Above 30 mmol/L (10 mmol/L if < 16yo)