Catecholamines, free, 24 hour urine-13490

Test info

  
Catecholamines, free, 24 hour urine
  
13490
  
LAB13490
  
CTU
  
Catecholamines, fractionated
Dopamine, 24-Hr urine
Epinephrine, 24-hr urine
Free Catecholamine fractionation
Norepinephrine, 24-hr urine
  
  • Urinary epinephrine
  • Urinary norepinephrine
  • Urinary dopamine
  
  • Work up neuroblastoma
  • Diagnose pheochromocytoma

Specimen

  
Urine, 24 hr
  

24 hr urine collection container with HCl

CAUTION: Strong acid; may cause skin burns.

  
30 mL aliquot of a 24 hour collection
  
4 mL aliqouot of a 24 hour collection
  

Refrigerate during collection

How to collect a 24 hr urine sample

 

  
  1. Measure and record the total urine volume 
  2. Mix well
  3. Transfer a 30 mL (minimum 4mL) aliquot to a Screw cap plastic container (sterile)

 

 

 

  
  

Refrigerated (preferred) - 14 days

Ambient - 3 days

Frozen (-70 °C) - 30 days

  
  • Specimen with no preservatives
  • Original container with pH >5

Performance

  
LabCorp Burlington (004176): R-LC
  
Mo - Fr
  
3 - 8 days
  

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

Clinical and Interpretive info

  

Epinephrine 
0 - 9 years:     0−11 µg/24 hours
10 - 19 years:  0−18 µg/24 hours
>19 years:       0−20 µg/24 hours

Norepinephrine
0 - 9 years:      0−59 µg/24 hours
10 - 19 years:  0−90 µg/24 hours
>19 years:       0−135 µg/24 hours

Dopamine
0 - 9 years:      0−414 µg/24 hours
10 - 19 years:   0−575 µg/24 hours
>19 years:        0−510 µg/24 hours

  

Pheochromocytomas and occasional paragangliomas may cause persistent or paroxysmal hypertension. Work up palpitation, severe headache, diaphoresis.

Urine collections are preferred to blood sampling when there is suspicion for tumor (eg, family history of MEA II) when hypertension is not paroxysmal. Evaluate for possible multiple endocrine adenomatosis type II.

Billing

  
82384
  
Result 11046-0

Tracking

  
03/29/2019
  
01/26/2021
  
02/19/2021