UREA NITROGEN, 24-HOUR URINE
Methodology: Urease
	Test Performed At:
		St. Louis Children’s Hospital
	Specimen Required:
		Submit an entire 24-hour urine collection in a urine container supplied by St. Louis Children’s Hospital. Refrigerate specimen during collection, and send specimen refrigerated. Although a 24-hour specimen is preferred, other timed and random specimens will be tested and should be ordered as such.
		NOTE:	1.	24-HOUR COLLECTION START AND STOP TIMES ARE REQUIRED ON REQUEST FORM FOR PROCESSING.
			2.	Follow instructions on policies section, “Urine Collection.”
	Laboratory Notes:
		Mix the specimen well and aliquot 1.0 mL of urine into a conical tube. Spin and separate. Record total volume and collection time in minutes on aliquot container(s).
		NOTE:	If collection duration is NOT 24-hour, cancel order and reorder for Tmd or Rnd testing.
	Reference Values:
		12-20 g/24H
	Day(s) Test Set Up:
		Monday – Sunday
	Cut-Off Time:
	Turn Around Time:
		Same day
	CPT Code:
		84540
	KIDDOS Order Name:
		Urea Nitrogen 24 Hour Urine Battery
	Cerner Order Name:
		24H Ur Urea Nitrogen SLC

Last Updated 05/07

Last Reviewed 12/09