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HelpTest Code UUNR or LAB748 Urea Nitrogen (BUN), Random, Urine
Specimen Requirements
| Container Type: |
Sterile urine cup
|
| Optimal Collection Volume: |
5 mL |
| Minimum Volume: |
1 mL |
| Collection Instructions: |
1. Collect a random urine specimen from the patient. 2. Ensure the lid is secured tightly before sending it to the lab. 3. Ensure that no preservatives are used. |
| Specimen Transport: |
Refrigerate |
| Processing Instructions: |
1. Pour off urine into a labeled aliquot tube. 2. Centrifuge the urine aliquot. 3. Deliver the urine aliquot to the chemistry department. |
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated | 7 days |
| Room Temperature | 2 days | |
| Frozen | 1 month |
Specimen Rejection Criteria
Quantity not sufficient
Useful For
Assessment of kidney failure (prerenal vs. acute kidney injury)
Methodology
Roche Cobas - Kinetic test with urease and glutamate dehydrogenase
Reference Ranges
No established reference values.
Day(s) Performed
24/7
Expected TAT
Same day
Performing Laboratory
Bronson Laboratory, Chemistry - Kalamazoo and Battle Creek
Sample Retention Time
7 days
CPT Code
84540
LOINC Code
3095-7