Citrate, Urine 24 Hour
Test Mnemonic
UCITD
CPT Codes
- 82507 - QTY (1)
LOINC ®
6687-8
Aliases
- Citric Acid, urine
- Urine Citric Acid 24 Hour
Performing Laboratory
Cleveland Clinic Laboratories
FDA Category
Laboratory Developed Test
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 5 mL | Urine, 24-hour (well-mixed) | 24 HR Urine Container | Refrigerate during collection. | Refrigerated | Transfer aliquot to clean transport tube. Acidify to pH < 4 with hydrochloric acid, when possible. Indicate total urine volume on requisition. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | None if not acidified. 48 hours if acidified (pH < 4) |
| Frozen | 30 days if not acidified. 30 days if acidified (pH < 4) |
| Refrigerated | 7 days if not acidified. 14 days if acidified (pH < 4) |
Days Performed
Mon - Fri
Turnaround Time
1 - 3 days
Methodology
| Name | Description |
|---|---|
| Enzymatic |
Reference Range
| Citrate, Urine 24 Hour | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Female | 18 Years | Years | Normal | 250 - 1160 | mg/24 hrs | Male | 18 Years | Years | Normal | 120 - 930 | mg/24 hrs |
Special Info
Indicate total volume on requisition. When possible, acidify urine with hydrochloric acid to obtain a pH <4 prior to transporting sample to testing laboratory.
Clinical Info
Evaluation of nephrolithiasis risk and prevention