Urea Nitrogen, Quantitative, Urine

CERNER / EPIC MNEMONIC: RU/UN (random urine); U/UN (24-hour urine)
POE DESCRIPTION:

Urine Urea Nitrogen Random; Urine Urea Nitrogen Timed

CPT CODE:

Random = 84540; Timed = 84540, 81050

TEST INFORMATION: Results are reported as grams of urea nitrogen in total volume of urine submitted. Normal range is based on a 24-hour collection.
DAYS PERFORMED: Specimen accepted daily, 24 hours
TURNAROUND TIME:

8 hours

SPECIAL INSTRUCTIONS: For times urine collection, instruct the patient to void at the beginning of the collection period and discard the specimen. Then collect all urine including the final specimen voided at the end of the collection period. Containers must be labeled with patient`s full name, room number, date and time collection started, and date and time collection finished.
CONTAINER TYPE:

Random Sterile 80 ml specimen container, Timed 24 hour urine container (Bottle #1) with no preservative

SPECIMEN REQUIREMENTS:

Random or 24-hour urine

MINIMUM VOLUME: Random urine: 1 mL; Timed urine: Submit entire urine collection to the laboratory.
HANDLING INSTRUCTIONS: Refrigerate during collection.
REFERENCE RANGE: Random: None established; Timed: 7-20 g/24 hours
TEST SYNONYM(S):Urine Urea Nitrogen; UUN