Catecholamines, Fractionated, Plasma

Message
Patient should be supine 30 minutes before drawing.

Test Code
CATFP (314)

Quest Code
314

CPT Codes
82384

Includes
Dopamine, Epinephrine, Norepinephrine and Total Catecholamines (calculated)

Preferred Specimen
4 mL plasma collected in a sodium heparin (green-top) tube

Patient Preparation
Overnight fasting is required. Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection.
Patients should be relaxed in either a supine or upright position before blood is drawn. States of anxiety and stress can cause fluctuations in the catecholamine levels. Draw specimen in a pre-chilled green-top Vacutainer®.

Minimum Volume
2.5 mL

Other Acceptable Specimens
Lithium heparin (green-top) tube, or sodium heparin lead-free (tan-top) tube

Instructions
Plasma should be separated in a refrigerated centrifuge within 30 minutes of collection and place in ice and centifuge for 20 minutes.

The plasma **must** be free of RBC'S. Transport on dry ice.

Transport Temperature
Frozen

Specimen Stability
Room temperature: 6 hours
Refrigerated: 6 hours
Frozen: 30 days

Methodology
High Performance Liquid Chromatography (HPLC) • Electrochemical Detection

Setup Schedule
Mon-Fri

Report Available
3 to 6 Day(s)

Limitations
Recent surgery, traumatic injury, upright posture, cold, anxiety, pain, clonidine withdrawal, and concurrent acute or chronic illness may produce elevated results.

Reference Range
see Laboratory Report

Clinical Significance
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 (phechromocytomas, neuroblastomas, and gangliomas) and with the evaluation of orthostatic hypotension.

Performing Laboratory
Quest Diagnostics Nichols Institute San Juan Capistrano
33608 Ortega Hwy
San Juan Capistrano, CA 92675-2042



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.