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Test Code RAMBO Ammonium, Random, Urine

Reporting Name

Ammonium, Random, U

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Diagnosis of the cause of acidosis using random urine specimens

 

Diagnosis and treatment of kidney stones

Method Name

Enzymatic


Specimen Required


Supplies: Sarstedt 5 mL Aliquot Tube (T914)

Container/Tube: Plastic tube

Specimen Volume: 4 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.


Specimen Type

Urine

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

Random: 3-65 mmol/L

No reference values established for <18 years and >77 years of age.

Interpretation

If a patient has acidosis and the amount of ammonium in the urine is low, this is suggestive of a renal tubular acidosis.

 

If the amount of ammonium is high, this suggests that the kidneys are working normally and that there are other losses of bicarbonate in the body. Typically this implies gastrointestinal losses.

Day(s) Performed

Monday through Sunday

Report Available

Same day to 2 days

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
RAMBO Ammonium, Random, U 1842-4

 

Result ID Test Result Name Result LOINC Value
RAMBO Ammonium, Random, U 1842-4

Forms

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