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Test Code UREA U QNT Urea, 24 Hour Urine

Clinical System Name

Urine Urea Quantitation, 24 Hour

Synonyms

Nitrogen, urea

Sample Requirements

Specimen:  Urine

Container(s): 24 Hour Urine Container

Preferred Vol: 24 hr collection

Minimum Vol: N/A

 

Note: Do not use preservatives in this collection. Go to the clinical lab with patient label to obtain urine container.  Refrigerate urine specimen during collection.  Document start and stop dates and times, along with patient information, on the container.  Deliver labeled container to clinical lab upon completion.

 

Processing Instructions

Reject due to

Spin: N

Aliquot: N

Temp: 2-8oC

Storage location: CPA refrigerator. Labels are stored in CPA refrigerator, FrigB bucket.

 

Off-site collection: Do not use preservatives in this collection. Go to the clinical lab with patient label to obtain urine container.  Refrigerate urine specimen during collection.  Document start and stop dates and times, along with patient information, on the container.  Send original container refrigerated.

Stability

 

Specimen Type Temperature Time
Urine RT

24 H

  2-8oC

 5 D

  -20oC or -70oC

 180 D

 

Availability

STAT Performed TAT
N M - F, day shift 1 -3 d

 

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Chemistry

Location: Chem East

Phone Number: 206-987-2617

Reference Range

Adults: 12.0 - 20.0 g/24 hr
 

Methodology

Method:  Spectrophotometric, Rate methods by Vitros 4600

Analytical Volume:  0.05 mL supernatant

Limitations: Method is affected by fecal contamination, loss of specimen during collection, Loss of 10% of total urine collected invalidates the test.

CPT Codes

84540