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Ammonium, 24-Hour Urine
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Ordering Recommendation
Use to determine cause of acidosis. May aid in diagnosis and monitoring of kidney stones.
Mnemonic
Methodology
Quantitative Enzymatic
Performed
Varies
Reported
3-5 days
New York DOH Approval Status
Specimen Required
24-hour urine. Refrigerate during collection or add 5 mL of diazolidinyl urea (Germall) as preservative at start of collection.
From a well-mixed 24-hour collection, transfer 4 mL urine to an ARUP Standard Transport Tube. (Min: 1 mL). Collection duration and urine volume must be provided for testing.Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Refrigerated. Also acceptable: Frozen.
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.
Ambient: 72 hours; Refrigerated: 2 weeks; Frozen: 2 weeks
Reference Interval
By Report
Interpretive Data
Performed by non-ARUP Laboratory
Note
Reference values have not been established for patients less than 18 years and greater than 77 years of age. The presence of sulfasalazine, sulfapyridine, or temozolomide may lead to false results.
Hotline History
Hotline History
CPT Codes
82140
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 3004263 | Ammonium, 24 Hour Urine | 25308-8 |
| 3004264 | Ammonium Collection Duration | 13362-9 |
| 3004265 | Ammonium Urine Volume | 3167-4 |
Aliases
- Ammonia
Mayo Clinic Laboratories
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