CATP - Specimen: Catecholamine Fractionation, Free, Plasma

Test Catalog

Test Name

Test ID: CATP    
Catecholamine Fractionation, Free, Plasma

Specimen Type Describes the specimen type validated for testing

Plasma EDTA Meta

Advisory Information

Unless the purpose of the measurement is drug monitoring, discontinue any epinephrine, norepinephrine, or dopamine injections or infusions for at least 12 hours before specimen draw.


Do not perform the test on patients withdrawing from legal or illegal drugs known to cause rebound plasma catecholamine release during withdrawal (see Cautions for details)

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Patient Preparation: Discontinue drugs that release epinephrine, norepinephrine, or dopamine, or hinder their metabolism for at least 1 week before obtaining the specimen (see Cautions for details). If this is not possible for medical reasons, contact the laboratory and discuss whether a shorter drug withdrawal period may be possible in a particular case.


The patient must refrain from eating, using tobacco, and drinking caffeinated beverages for at least 4 hours before the specimen is drawn.


Supplies: Catecholamine tubes containing EDTA-sodium metabisulfite solution (T066) (tubes have a 6-month expiration time)


Submission Container/Tube: Plastic vial

Specimen Volume: 3 mL

Collection Instructions:

1. Drawing from a catheter is required.

2. Calm the patient by giving complete instructions and reassurance regarding the procedure.

3. Insert an indwelling intravenous catheter. Flush with 3 mL of NaCl, using positive pressure.

4. Have the patient rest for 30 minutes in the supine position in a quiet room.

5. At the end of the 30 minutes, withdraw and discard a minimum of 3 mL of blood to remove the saline out of the catheter.

6. If provocative sampling (eg, standing specimen) is required, perform provocative maneuver immediately after obtaining supine specimen. Obtain standing specimen immediately.

7. For each specimen, draw 10 mL of blood into the chilled EDTA-sodium metabisulfite 10-mL tube.

8. Specimens must remain at refrigerated temperature during processing and transport.

9. Separate plasma in a refrigerated centrifuge within 30 minutes of draw.

10. Freeze specimen immediately.


If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

Oncology Test Request Form (T729) (

Specimen Minimum Volume The amount of sample necessary to provide a clinically relevant result as determined by the Laboratory.

2 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected


Mild OK; Gross reject


Mild OK; Gross OK


Mild OK; Gross OK



Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperatures are also included.

Specimen TypeTemperatureTime
Plasma EDTA MetaFrozen7 days