Catecholamines, Fractionated, Upright, Plasma
Use
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.
Special Instructions
Patient preparation includes overnight fasting preferred. Patients should be relaxed in an upright position before blood is drawn; avoid alcohol, coffee, tea, tobacco, and strenuous exercise prior to collection.
Limitations
Not provided.
Methodology
Mass Spectrometry
Biomarkers
Result Turnaround Time
3-6 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
2 mL (1 mL minimum)
Minimum Volume
1 mL
Container
sodium heparin (green‑top) tube
Collection Instructions
Draw specimen in a pre‑chilled green‑top vacutainer. Plasma should be separated in a refrigerated centrifuge within 30 minutes of collection and then frozen immediately at -20 °C in plastic vials.
Patient Preparation
Overnight fasting preferred; patients should be relaxed upright; avoid alcohol, coffee, tea, tobacco and strenuous exercise before collection.
Causes for Rejection
Received room temperature or refrigerated (not frozen)
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 6 hours |
| Refrigerated | 6 hours |
| Frozen | 30 days |