Urea Nitrogen, Urine, 24 hrPrint this page
Updated Test Information:
Urea Nitrogen, Urine, 24 hr
|Alternate Specimen Type||
Urine, 24 hour collection
|Specimen Collection / Processing Instructions||
Urine, 24 hour collection - 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.
2 days at 20-25 ˚C
7 days at 4-8 ˚C
1 month at -20 ˚C
|Unacceptable Specimen Conditions||
Bacterial growth in the specimen and high atmospheric ammonia concentrations as well as contamination by ammonium ions may cause erroneously elevated results.
|Minimum Sample Volume||
10 ml aliquot of entire collection
|Pediatric Min. Volume (if applicable)||
24 hr Urine: 12 - 20 g/24h