Casandra
Casandra Test Code LC77932Version 1 (DRAFT)
Performing Lab
Urea Nitrogen Clearance
Also known as: Urea Clearance, UUN Clearance
Clinical Use
Order TestUse
Renal function test
Special Instructions
Not provided.
Limitations
The test may not reflect accurate renal function in patients with abnormal urine output or with significant muscle mass abnormalities. External factors such as diet or medications that affect renal function can also influence results. Accurate specimen collection and processing are crucial for valid results.
Test Details
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
Blood urea nitrogen
AnalyteConcentration / Level
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Urea clearance
AnalyteConcentration / Level
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Urine urea nitrogen
AnalyteConcentration / Level
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
LOINC Codes
Order Codes
- 81232-1 - Supersaturation Pnl 24h Ur
Result Codes
- 3094-0 - BUN SerPl-mCnc
- 3098-1 - Urea Cl 24h Ur+SerPl-vRate
- 3095-7 - UUN Ur-mCnc
- 3096-5 - UUN 24h Ur-mRate
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
Gel-barrier tube or transport tube
Collection Instructions
Serum must be drawn during urine collection. Separate serum from cells within 45 minutes of collection.
Storage Instructions
Maintain specimen at room temperature.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |
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