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Catecholamines, Fractionated, 24-Hour Urine (without Creatinine)Test Code
Dopamine, Epinephrine, Norepinephrine, Total Catecholamines (calculated)
10 mL of a 24-hour urine, preserved with 25 mL 6N HCI during collection, submitted in a plastic, leak-proof container
Urine with preservative should maintain a pH below 3.
Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen.
Random Urine: After urine collection, add enough 6N HCL to maintain PH below 3.
Please specify on the request form and on the urine container random, timed (not 24-hour), or the total 24-hour volume.
Room temperature: 7 days
Refrigerated: 30 days
Frozen: 49 days
High Performance Liquid Chromatography (HPLC)
Recent surgery, traumatic injury, upright posture, cold, anxiety, pain, clonidine withdrawal, and concurrent acute or chronic illness may produce elevated results.
|3-8 Years||5-41 mcg/24 h|
|9-12 Years||5-50 mcg/24 h|
|13-17 Years||12-88 mcg/24 h|
|>17 Years||15-100 mcg/24 h|
|3-8 Years||1-7 mcg/24 h|
|9-12 Years||≤8 mcg/24 h|
|13-17 Years||≤11 mcg/24 h|
|>17 Years||2-24 mcg/24 h|
|3-8 Years||80-378 mcg/24 h|
|9-12 Years||51-474 mcg/24 h|
|13-17 Years||51-645 mcg/24 h|
|>17 Years||52-480 mcg/24 h|
|3-8 Years||9-51 mcg/24 h|
|9-12 Years||9-71 mcg/24 h|
|13-17 Years||13-90 mcg/24 h|
|>17 Years||26-121 mcg/24 h|
Fractionated catecholamine measurement is useful in the diagnosis of pheochromocytoma and its differentiation from essential hypertension.
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153