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HelpTest Code LAB4192 SODIUM, URINE, 24 HOUR
Specimen Type
24-hour urine collection
Collection Instructions
Collect a 24-hour urine in a 24-hour dark plastic urine container wtih no preservatives. Refrigerate during collection. Record Collection dates and start/stop times. Deliver to the laboratory on ice.
Specimen Volume
50 mL
Minimum Volume
40 mL
Turnaround Time
STAT: 1 hour
Routine: 4 hours
Test Schedule
Daily
Sample Stability
Room Temperature: 45 days
Refrigerated: 45 days
Frozen: 1 year
Specimen Processing
Invert 24 hour urine container several times to mix the specimen.
Aliquot 50 mL of a well-mixed 24-hour urine collection into a leakproof plastic urine container.
Aliquot 5 mL into a transparent red top tube.
Record collection time and total volume.
Freeze 50ml Specimen Aliquot.
Method
Indirect ISE (Ion-selective electrode)
Reference Ranges
| Sodium, 24-hr urine, mmol/24 Hrs | ||
| Male | Female | |
| 0-6 Years | None Established | |
| 6-10 Years | 41 - 115 | 20 - 69 |
| 10-14 Years | 63 - 177 | 48 - 168 |
| >14 Years | 40 - 220 | 27 - 287 |
Synonyms
Na, Urine
Test Components
Collection Period, h; Volume, mL; Sodium, Urine, mmol/24h.
CPT Codes
84300
Specimen Rejection
Specimens contaminated with fecal material or meconium will be rejected.