Urea Nitrogen, Timed Urine


Abbrev Code:UBUNT   
Order Code:LAB3816Order Name:Urea Nitrogen Timed Urine
Methodology:Bichromatic rate
St Joseph: Urease
CPT Codes: 84540 x1, 81050 x1
Test Includes:Urea Nitrogen Urine mg/dL; Urea Nitrogen Urine g/g Cr; Creatinine Urine mg/dL
Turnaround Time:Performed and reported 24 hours/day.
Associated Links:

Urine Collection Procedure



Collection Instructions

Specimen:Urine, timed collection (20 to 28 hours)
Optimal Volume:Submit entire collection; analysis requires 1 mL
Container:3 L plastic jug
Collection Instructions:IVP dye does not interfere with sample analysis.


Processing and Shipping

Specimen Processing:Mix collection well before aliquot is taken. Centrifuge specimens containing red cells or precipitate. Aliquot 5 mL, 1 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:4 days refrigerated.
Test Performed at or Referral Lab Chemistry  (Range, UMMC-West Bank, UMMC-East Bank, Ridges, Southdale, St. Joseph's)


Interpretive

Reference Range:24 hour collection: Urea Nitrogen: 12-20 g/24 hours.
Use:Evaluate metabolism of urate, including gout and renal stones.


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