Metanephrines, fractionated, plasma free

Alphabetical Test listing

Metanephrines, fractionated, plasma free-13578

Test name:

Test number:

13578

Excellian order number:

LAB13578

Abbreviation:

METAFRAC

Alternate names:

Metanephrine
Normetanephrine
Plasma metanephrines
Quantitative metanephrines

Useful for:

Diagnose pheochromocytoma, a catecholamine-secreting tumor of the adrenal medulla

Patient preparation information:

Patient should be fasting overnight (water and non-caffeinated soft drinks are permissible).
- Fasting for a blood test
Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection.

Specimen type:

EDTA plasma

Collection container:

Lavender (EDTA), 4mL

Volume:

0.6 mL

Minimum volume:

0.4 mL

Collection instructions:

Draw blood in chilled lavender-top (EDTA) tube
Immediatley following collection, mix sample by inverting 8 - 10 times to prevent clotting

Processing instructions:

Spin
Transfer plasma to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as EDTA plasma, within two (2) hours of sample collection

Note: If necessary, the whole blood sample may be kept refrigerated at 4^○C for up to two hours before centrifugation

Transport container:

Transfer vial/tube with cap - 12mL (LabCorp)

Transport and stability:

Refrigerated (preferred) - 14 days

Frozen - 14 days

Freeze/thaw cycles - stabile x3

Ambient - NO

Performing lab:

LabCorp Burlington (121806): R-LC

Days set up:

Mo - Fr

TAT:

7 - 9 days

Method:

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Reference ranges:

Metanephrine:

0 - 88 pg/mL

Normetanephrine:

Age (years)	Range (pg/mL)
Age (years)	Male	Female
0 - 4	Not established	Not established
5 - 11	0.0 - 165.9	0.0 - 148.0
12 - 19	0.0 - 150.8	0.0 - 150.8
20 - 40	0.0 - 210.1	0.0 - 210.1
41 - 50	0.0 - 218.9	0.0 - 218.9
51 - 60	0.0 - 244.0	0.0 - 244.0
61 - 80	0.0 - 285.2	0.0 - 285.2
>80	0.0 - 297.2	0.0 - 297.2

CPT codes:

83835

LOINC code:

Result 2669-0

Date created:

04/10/2019

Revised date:

06/13/2023

Review date:

06/13/2023