Nitrogen, Total, Urine
| Abbrev Code: | MMMISC | ||
| Order Code: | LAB4909 | Order Name: | Nitrogen, Total, Urine |
| Methodology: | Dumas combustion | ||
| CPT Codes: | 84999 x1 | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Fri; results are reported within 1-5 days. | ||
| Compliance: | This test was developed and its performance characteristics determined by Laboratory Medicine and Pathology, Mayo Clinic. This test has not been cleared by the U.S. Food and Drug Administration. |
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Collection Instructions
| Specimen: | Urine, 24 hour collection |
| Optimal Volume: | Submit entire 24 hour collection; analysis requires 2 mL. |
| Container: | 3 L plastic jug |
| Collection Instructions: | Refrigerate during collection. |
Processing and Shipping
| Specimen Processing: | Mix collection well before aliquot is taken. Aliquot 10 mL, 2 mL minimum, into two transport tubes. Store in refrigerator. |
| Shipping Instructions: | Ship at refrigerated temperature. |
| Test Performed at or Referral Lab | Lab Sendouts (Mayo) |
| Referral Lab number: | NITU |
Interpretive
| Reference Range: | 16 years of age and older: 4-20 g/24hours. A reference range for patients under 16 years of age has not been established by the reference laboratory. |
| Use: | Measure of protein catabolism; monitor total parenteral nutrition. |
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