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Catecholamines, Fractionated, 24-Hour Urine (without Creatinine) [318X]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)
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
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