Aldosterone, urine

Alphabetical Test listing

Aldosterone, urine-13492

  
Aldosterone, urine
  
13492
  
LAB13492
  
ALSU
  
Aldosterone, 24-hour urine
  
  • Study of adrenocortical-renin-angiotensin system
  • Adrenal cortical function test
  • Evaluate renal hypertension
  • Diagnose Conn syndrome (primary aldosteronism)
  • Evaluate hypokalemia with hypertension
  
  • If patient is taking diuretics, antihypertensive drugs, cyclic progestational agents, estrogen, or licorice, results for aldosterone may not be interpretable
  • Patient should be on a diet containing 135 mmol (3 g) sodium per day for at least two weeks and preferably 30 days prior to testing
  
Urine, 24-hour collection
  

Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning) into the plastic urine container. Screw the lid on securely. Transport the specimen promptly to the laboratory.

Container MUST be labeled with patient's full name, date and time collection started, and date and time collection finished.

How to collect a 24 hr urine sample

  
  1. Measure and record the total volume of 24 hour collection
  2. Mix sample well
  3. Transfer  a 10mL (minimum 1.0mL) aliquot to a Transfer vial/tube with cap - 12mL (LabCorp)

pH must be 4 to 8

  

Refrigerated (preferred) - 14 days

Ambient - 7 days

Frozen - 14 days

  
  • Incomplete 24-hour collection
  • Original container with pH <2
  
LabCorp Burlington (004291): R-LC
  
Tu, Th
  
6 - 9 days
  

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

  

Pediatric:
0 - 3 days:           0.00−5.00 μg/24 hrs
4 days - 10 years: 0.00−8.00 μg/24 hrs
>10 years:           0.00−19.00 μg/24 hrs

Adult:
Low sodium intake:     20.00−80.00 μg/24 hrs
Normal sodium intake:  0.00−19.00 μg/24 hrs
High sodium intake:      0.00−12.00 μg/24 hrs

  
82088
  
Result 1765-7
  
03/27/2019
  
03/29/2021
  
02/11/2021