Test Details

Mnemonic

DOP

Ordering Code

3501425

CPT-4 Code(s)

82542

Specimen Information

Patient Preparation

Patients should be relaxed in either a supine or upright position before blood in drawn. States of anxiety and stress can cause fluctuations in the catecholamine levels. Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection. Overnight fast is preferred.

Collect

Green sodium heparin (pre-chilled)

Specimen Preparation

Plasma should be separated in a refrigerated centrifuge within 30 minutes of collection and then frozen immediately at -20°C in a screw capped plastic vial. Send 4.0 mL plasma frozen in a plastic screw capped vial.

Alternate Specimen

Plasma: Lithium heparin

Minimum Volume

2.0 mL

Transport Temperature

Frozen

Rejection Criteria

EDTA plasma, samples received not frozen.

Stability

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

Methodology

Chomatography
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Reference Range

See report
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Performing Laboratory

Quest SJC
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