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.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Tuesday, Thursday
Analytic Time

2 - 7 days

Soft Order Code
ALDU
MiChart Code
Aldosterone, 24HR Urine(Sendout)
Synonyms
    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
    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
    Storage Temperature
    Refrigerated preferred, ambient or frozen acceptable
    Rejection Criteria
    Specimen MUST have wither acetic or boric acid as preservative. Temperature controls alone are cause for rejection (ie. unpreserved urine refrige or frozen)
    Additional Information

    Test sent to Mayo Medical Laboratories.

    Billing
    CPT Code
    82088
    Fee Code
    37975
    LOINC
    1765-7
    NY State Approved
    No