Test Details
Methodology
Urease
Result Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Use
Renal function test; coarse nitrogen-wasting test on patients on hyperalimentation; indicate nitrogen balance in hyperalimentation; rule out tap of urinary bladder in amniocentesis, paracentesis
Special Instructions
Record total 24-hour urine volume on the request form.
Specimen Requirements
Specimen
Urine (24-hour)
Volume
10 mL aliquot of entire collection
Minimum Volume
1 mL aliquot (Note: This volume does not allow for repeat testing.)
Container
Plastic urine container, no preservative
Collection Instructions
Refrigerate the specimen as it is collected. Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely. Container must be labeled with patient's full name, date and time collection started, and date and time collection finished.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 14 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x3 |
Reference Range
See table.
Age | Male (g/24 hr) | Female (g/24 hr) |
|---|---|---|
0 to 5 y | Not established | Not established |
6 to 17 y | 3–21 | 2–13 |
18 to 70 y | 5–22 | 4–16 |
>70 y | 4–16 | 2–12 |
Storage Instructions
Room temperature
Causes for Rejection
Improper labeling
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 003541 | Urea Nitrogen, 24-Hour Urine | 013508 | Urea Nitrogen, U | mg/dL | 3095-7 | |
| 003541 | Urea Nitrogen, 24-Hour Urine | 013236 | Urea Nitrogen, 24hr | g/24 hr | 3096-5 | |
| Order Code | 003541 | |||||
| Order Code Name | Urea Nitrogen, 24-Hour Urine | |||||
| Order Loinc | ||||||
| Result Code | 013508 | |||||
| Result Code Name | Urea Nitrogen, U | |||||
| UofM | mg/dL | |||||
| Result LOINC | 3095-7 | |||||
| Order Code | 003541 | |||||
| Order Code Name | Urea Nitrogen, 24-Hour Urine | |||||
| Order Loinc | ||||||
| Result Code | 013236 | |||||
| Result Code Name | Urea Nitrogen, 24hr | |||||
| UofM | g/24 hr | |||||
| Result LOINC | 3096-5 |