CATECHOLAMINES, FRACTIONATED, PLASMA

Components
Includes Epinephrine, Norepinephrine, Dopamine and Total Catecholamines

Specimen Required
Patient Preparation: 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. Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection. Overnight fasting is required. Draw blood in a pre-chilled green sodium heparin tube. After drawing specimen place green top tube in a ice bath. Centrifuge for 20 minutes 1000 x G. The plasma must be free of red blood cells. Send 4.0 mL plasma (2.5 mL minimum) frozen in 2 screw-capped plastic vials. CRITICAL FROZEN.

Alternate Specimen
Plasma: Lithium heparin

Methodology
High Performance Liquid Chromatography with Electrochemical Detection

Stability
Room Temperature: 6 hours; Refrigerated: 6 hours; Frozen: 30 days

Reference Range
By report

Performed
Monday-Friday

Turnaround Time4-7 days
Test CodeCATFP
CPT-4 Code (s)
82384
LOINC Codes
Total Catecholamines   2056-0  
Dopamine   2216-0  
Epinephrine   2230-1  
Norepinephrine   2666-6  

Warde
Medical
Laboratory