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Test ID NITF Nitrogen, Total, Feces

Useful For

Determining nitrogen balance, when used in conjunction with 24-hour urine nitrogen measurement

 

Assessing nutritional status (protein malnutrition)

 

Evaluating protein catabolism

Method Name

Dumas Combustion

Reporting Name

Nitrogen, Total, F

Specimen Type

Fecal


Shipping Instructions


Send entire stool collection (must contain at least 5 g of feces) frozen on dry ice in Mayo Clinic Laboratories-approved container.



Necessary Information


Length of collection period is required.



Specimen Required


Patient Preparation: Laxatives and enemas should not be used during collection.

Supplies: Stool Containers - 24, 48, 72 Hours Kit (T291)

Container/Tube: Stool container (T291); complies with shipping requirements, do not use other containers.

Specimen Volume: Entire collection (24, 48, 72, or 96 hour)

Collection Instructions:

1. Entire collection must be submitted which should contain at least 5g to 10 g of feces.

2. See Stool Collection Information Sheet in Special Instructions

Additional Information: Barium and boric acid interfere with test procedure.


Specimen Minimum Volume

2.5 g

Specimen Stability Information

Specimen Type Temperature Time Special Container
Fecal Frozen (preferred)
  Ambient  7 days
  Refrigerated  7 days

Reference Values

<16 years: not established

≥16 years: 1-2 g/24 hours

Day(s) and Time(s) Performed

Tuesday, Friday; 11 a.m.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

84999

LOINC Code Information

Test ID Test Order Name Order LOINC Value
NITF Nitrogen, Total, F 16141-4

 

Result ID Test Result Name Result LOINC Value
17417 Nitrogen, Total, F 16141-4
DUR9 Collection Duration 13363-7
17416 Total Weight 30078-0

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

NY State Approved

Yes