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Register NowUrea Nitrogen, 24-Hour Urine
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CPT Code:
84540
Test Type: 10 mL aliquot, Urine (24-hour)
Stability Time:
|
Temperature |
Period |
|---|---|
|
Room temperature |
14 days |
|
Refrigerated |
14 days |
|
Frozen |
14 days |
|
Freeze/thaw cycles |
Stable x3 |
Reference Range:
|
Age |
Male (g/24 hr) |
Female (g/24 hr) |
|---|---|---|
|
0 to 5 y |
Not established |
Not established |
|
6 to 17 y |
3–21 |
2–13 |
|
18 to 70 y |
5–22 |
4–16 |
|
>70 y |
4–16 |
2–12 |
Overview:
Renal function test; coarse nitrogen-wasting test on patients on hyperalimentation; indicate nitrogen balance in hyperalimentation; rule out tap of urinary bladder in amniocentesis, paracentesis.
Collection Details:
Collection Instructions:
Record total 24-hour urine volume on the request form.
Plastic urine container, no preservative.
Refrigerate the specimen as it is collected. Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely. Container must be labeled with patient's full name, date and time collection started, and date and time collection finished.
Room temperature.