The test requires 24-hour urine (total urine produced over a 24-hour period). The collected urine should be stored in a refrigerator during this time interval.
If the patient is taking medication, it is recommended that they consult their physician before the test. Drugs, diet, and physical activity all affect catecholamine levels, so it is especially important that the result reflects a real metabolic situation.
A blood sample taken from a vein is needed to determine the level of catecholamines in the blood.
Catecholamines are normally produced in larger amounts when some stress affects the body. Too elevated level of catecholamine in the body may indicate a tumour, but further tests may be needed to make an accurate diagnosis.