|Test List||A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #|
Catecholamines, Fractionated, 24-Hour Urine (without Creatinine)Test Code
Dopamine, Epinephrine, Norepinephrine, Total Catecholamines (calculated)
10 mL aliquot from a 24-hour collection preserved with 6N HCl at the start of collection. Unpreserved specimens must be frozen.
See Urine in the Blood, Urine and Stool section of Specimen Collection and Handling
Record 24-hour urine volume on test request form and urine container. Collect 24-hour urine with 25 mL 6N HCl to maintain a pH below 3. 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. Boric Acid and Acetic Acid are no longer acceptable preservatives.
Urine Container, leak-proof
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