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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 as barium and boric acid interfere with test procedure.

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

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

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

Collection Instructions:

1. All containers must be sent together.

2. Entire collection must contain at least 5 g of feces.

3. The number of containers sent should be indicated on the labels (ie, 1 of 4)

Specimen Stability Information: Frozen 3 years

Additional Information: Patient can store sample at refrigerate temperature during collection period.


Specimen Minimum Volume

See Specimen Required

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) Performed

Friday

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 US Food and Drug Administration.

NY State Approved

Yes

Report Available

1 to 8 days