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HelpTest Code LAB2004 Urea, 24 Hour Urine
Clinical System Name
Urine Urea Quantitation, 24 Hour
Synonyms
Nitrogen, urea
UREA U QNT
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 | Room temp |
|
| Refrigerated |
14 d |
|
| Frozen |
14 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
CPT Codes
84540
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.
Reference Range
Adults: 12.0 - 20.0 g/24 hr