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24 HR URINE BUN/UREA PANEL (WRJ)
MessageCHEMISTRY
Test Code
24 HR UA UREA
Alias/See Also
24 HR URINE UREA
Includes
TOTAL VOLUME, URINE UREA, URINE CREATININE
Preferred Specimen
24 HR URINE
Minimum Volume
20 ML
Instructions
OBTAIN 24HR URINE CONTAINER FROM THE LAB. THIS IS A DRY URINE JUG. DATE AND TIME OF COLLECTION AT THE START OF COLLECTION, AND AT THE END OF COLLECTION MUST BE RECORDED ON THE JUG. KEEP ON ICE DURING COLLECTION PERIOD.
Transport Container
24HR URINE CONTAINER-NO PRESERVATIVE
Transport Temperature
REFRIGERATED OR CONTAINER ON ICE
Specimen Stability
Room temperature: 2 days
Refrigerated (2-8°C): 6 days
Frozen (-20°C or colder): 6 months
Refrigerated (2-8°C): 6 days
Frozen (-20°C or colder): 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
IMPROPER COLLECTION CONTAINER
Methodology
Kinetic Jaffe
Setup Schedule
DAILY:M-F
Report Available
24-48 HRS
Reference Range
600 - 2000 mg/24hr
Clinical Significance
Creatinine is the endproduct of creatinine metabolism. Creatinine is present primarily in muscle and the amount of creatinine produced is related to total skeletal muscle mass. Daily creatinine production is fairly constant except when there is a massive injury to muscle. The kidneys excrete creatinine very efficiently and blood levels and daily urinary excretion of creatinine fluctuate very little in healthy normal people. Since blood and daily urine excretion of creatinine show minimal fluctuation, creatinine excretion is useful in determining whether 24-Hour urine specimens for other analysis (e.g., Protein) have been completely and accurately collected.
Performing Laboratory
WHITE RIVER JUNCTION VT VA-CHEMISTRY 802-295-9363 EXT: 5518, 5519
