Test Overview
Test Methodology

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Test Usage

Investigation of primary aldosteronism (e.g., adrenal adenoma/carcinoma and adrenal cortical hyperplasia) and secondary aldosteronism (renovascular disease, salt depletion, potassium loading, cardiac failure with ascites, pregnancy, Bartter's syndrome).

Reference Range *

0-30 days: 0.7 - 11.0 mcg/24 hr; 31 days-11 months: 0.7 - 22.0 mcg/24 hr; >or=1 year: 2.0 - 20.0 mcg/24 hr.

Test Details
Days Set Up
Tuesday, Thursday
Analytic Time

2 - 7 days

Soft Order Code
ALDU
MiChart Code
Aldosterone, 24HR Urine(Sendout)
Synonyms
  • Aldosterone, 24Hour Urine
  • ALDU
  • ALDOS
  • ALDUD - ALDU: Collection Duration
  • ALDUV - ALDU: Urine Volume
Laboratory
Sendout
Reference Laboratory
Mayo ALDU (8556)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect 24 hour urine specimen. Add 25 mL of 50% acetic acid (15 mL for pediatric patients <5 years) as a preservative prior to start of collection. Aliquot 10 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form.

Alternate Specimen
Frozen acceptable. Boric acid acceptable. HCl not acceptable. [5/10]
Normal Volume
10 mL aliquot of 24 hour urine collection
Minimum Volume
1 mL aliquot of 24 hour urine collection
Additional Information

Test sent to Mayo Medical Laboratories.

Billing
CPT Code
82088
Fee Code
37975
LOINC
1765-7