Metanephrines, fractionated, plasma free-13578

 

 

Test info

  
Metanephrines, fractionated, plasma free
  
13578
  
LAB13578
  
METAFRAC
  
Metanephrine
Normetanephrine
Plasma metanephrines
Quantitative metanephrines
  

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

Specimen

  
  • Patient should be fasting overnight (water and non-caffeinated soft drinks are permissible).
  • Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection.
  
EDTA plasma
  

Lavender (EDTA), 4mL

  
0.6 mL
  
0.4 mL
  
  1. Draw blood in chilled lavender-top (EDTA) tube
  2. Immediatley following collection, mix sample by inverting 8 - 10 times to prevent clotting
  
  1. Spin
  2. 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

 

  

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

  

Refrigerated (preferred) - 14 days

Frozen - 14 days

Freeze/thaw cycles - stabile x3

Ambient - NO

Performance

  
LabCorp Burlington (121806): R-LC
  
Mo - Fr
  
7 - 9 days
  

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

Clinical and Interpretive info

  

Metanephrine:

0 - 88 pg/mL

Normetanephrine:

Age (years) Range (pg/mL)
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

Billing

  
83835
  
Result 2669-0

Tracking

  
04/10/2019
  
06/13/2023
  
06/13/2023