Sign in →

Test Code UALDOM Aldosterone, 24 Hour, Urine

Additional Codes

 

MAYO Test ID

ALDU

EPIC Test ID

LAB354

 

Reporting Name

Aldosterone, U

Useful For

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

Method Name

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

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Urine


Advisory Information


Advice on stimulation or suppression tests is available from Mayo Clinic's Division of Endocrinology and may be obtained by calling Mayo Medical Laboratories.



Necessary Information


24-Hour volume is required.



Specimen Required


Patient Preparation: Spironolactone (Aldactone) should be discontinued for 4 to 6 weeks before testing.

Supplies: Urine tubes, 10-mL (T068)

Submission Container/Tube: Plastic, urine tube (T068)

Specimen Volume: 10 mL

Collection Instructions:

1. Collect urine for 24 hours.

2. Add 25 mL of 50% acetic acid as preservative at start of collection. Use 15 mL of 50% acetic acid for children <5 years old. This preservative is intended to achieve a pH of between approximately 2 and 4.

Additional Information: See Urine Preservatives for multiple collections and Renin-Aldosterone Studies for more detailed instructions in Special Instructions.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  14 days

Reject Due To

Hemolysis

NA

Lipemia

NA

Icterus

NA

Other

NA

Reference Values

0-30 days: 0.7-11.0 mcg/24 hours*

31 days-11 months: 0.7-22.0 mcg/24 hours*

≥1 year: 2.0-20.0 mcg/24 hours

 

*Loeuille GA, Racadot A, Vasseur P, Vandewalle B: Blood and urinary aldosterone levels in normal neonates, infants and children. Pediatrie 1981;36:335-344

Day(s) and Time(s) Performed

Tuesday, Thursday; 1 p.m.

CPT Code Information

82088

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ALDU Aldosterone, U 1765-7

 

Result ID Test Result Name Result LOINC Value
8556 Aldosterone, U 1765-7
TM47 Collection Duration 13362-9
VL45 Urine Volume 3167-4

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

Analytic Time

2 days

Urine Preservative Collection Options

Ambient

Yes

Refrigerated

Yes

Frozen

Yes

6N HCl

No

50% Acetic Acid

Preferred

Na2CO3

No

Toluene

Yes

6N HNO3

No

Boric Acid

Yes

Thymol

No