Home
HelpTest Code U24 Na SODIUM 24-HR URINE
Patient Preparation
No special preparation required
Special Collection Instructions
Specimen must be received with the following information included:
- Total volume of collection
- Start date and time
- Stop date and time
Collection Method
Urine collection
Container
24 hour urine container
Preferred Specimen
24 hour urine container
Acceptable Specimen(s)
24 hour urine container
Reference or Target Ranges
40-220 mmol/L
Reportable Units
mmol/L
Critical Value
Not defined for this assay
Reasons for Rejection
|
Hemolysis Threshold: |
500 mg/dL |
|
Icterus Threshold: |
60 mg/dL |
|
Lipemia Threshold: |
2000 mg/dL |
|
Other: |
QNS, contaminated, improperly labeled, improper specimen type |
Specimen Stability
|
Refrigerated |
7 Days |
|
Frozen |
30 Days |
24-hour urine collection should be made without addition of preservatives.
Performance Information
|
Days and Time Performed |
24/7 |
|
Expected Turn Around Time |
Stat: 1 Hour, Routine: 4 Hours |
|
Stat Availability |
Yes |
|
Performing Bench |
CRMC Chemistry |
|
Methodology/Method Description |
Siemens Atellica Ion-Specific Elctrode Indirect |
Additional Information / Important Notes
The laboratory computer system cannot extrapolate a 24 hour urine result with data from a timed urine sample that is not 24 hours. If a timed urine specimen is submitted that is not 24 hours and the physician insists that it be tested, the order cannot be resulted as a 24 hour urine. Cancel the 24 hour urine order and reorder the test as for a random urine. Enter the sodium result in mmol/L and add the following comment: “This urine specimen was collected over a period of _ hours with a total volume of _ mL. Since the collection period is not 24 hours, automatic extrapolation to 24 hour reports is not available. Clinical correlation and/or manual calculation of extrapolated 24 hour urine excretion levels is required.” (Enter the collection period in the first blank and the total volume in mL in the second blank.)
CPT Codes
81050
84300