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Test Code LAB000 - Enter Specimen type, Source, and Test Name Ammonium, 24 Hour, Urine

Additional Codes

Mayo test code: AMMO

Useful For

Diagnosis of the cause of acidosis

 

Diagnosis and treatment of kidney stones

Method Name

Enzymatic

Reporting Name

Ammonium, 24 Hr, U

Specimen Type

Urine


Necessary Information


24-Hour volume (in milliliters) is required.



Specimen Required


Supplies:

-Sarstedt 5 mL Aliquot Tube (T914)

-Diazolidinyl Urea (Germall) 5.0 mL (T822)

Container/Tube: Plastic vial

Specimen Volume: 4 mL

Collection Instructions:

1. Add 5 mL of diazolidinyl urea (Germall) as preservative at start of collection or refrigerate specimen during and after collection.

2. Collect urine for 24 hours.

3. Aliquot urine into plastic vial.

4. Specimens with pH >8 may indicate bacterial contamination and testing will be cancelled. Do not attempt to adjust pH as it will adversely affect results.

Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  72 hours

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

15-56 mmol/24 hour

Reference values have not been established for patients <18 years and >77 years of age.

Reference values apply to 24 hour collections.

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

82140

LOINC Code Information

Test ID Test Order Name Order LOINC Value
AMMO Ammonium, 24 Hr, U 25308-8

 

Result ID Test Result Name Result LOINC Value
AM24 Ammonium, 24 Hr, U 25308-8
TM25 Collection Duration 13362-9
VL91 Urine Volume 3167-4

Urine Preservative Collection Options

Note: The addition of preservative must occur at the start of collection or application of temperature controls must occur during and after collection.

Ambient

No

Refrigerate

OK

Frozen

OK

50% Acetic Acid

OK

Boric Acid

OK

Diazolidinyl Urea

Preferred

6M Hydrochloric Acid

OK

6M Nitric Acid

No

Sodium Carbonate

No

Thymol

OK

Toluene

No

Forms

If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.