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Catecholamines, Fractionated, Plasma [314X]Test Code
Dopamine, Epinephrine, Norepinephrine and Total Catecholamines (calculated)
4 mL plasma collected in a sodium heparin (green-top) tube
Other Acceptable Specimens
Plasma collected in a lithium heparin (green-top), or sodium heparin, lead-free (tan-top) tube
Plasma should be separated in a refrigerated centrifuge within 30 minutes of collection and then frozen immediately at -20°C in plastic vials. Each specimen will be invoiced separately.
Plastic screw-cap vial
Room temperature: 6 hours
Refrigerated: 6 hours
Frozen: 30 days
High Performance Liquid Chromatography (HPLC) with Electrochemical Detection
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the FDA. 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.
See Laboratory Report
The three catecholamines (norepinephrine, epinephrine, and dopamine) are the principal secretory products of neural tissue. Clinically, the measurement of circulating catecholamines is valuable in the diagnosis of catecholamine secreting tumors associated chiefly with hypertension (pheochromocytomas, neuroblastomas, and gangliomas) and with the evaluation of orthostatic hypotension.
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153