| EX0726 FRACTIONAL EXCRETION OF SODIUM |
| Specimen: |
3 mL (2 mL min.) serum from 1 SST AND 10 mL (5 mL min.) aliquot of random urine in a sterile screw-capped container. Ship refrigerated or frozen. |
| Stability: |
| Room |
Refrigerated |
Frozen |
| 6 hrs |
1 week |
1 week |
|
| Method: |
Jaffe’s reaction, Indirect ISE |
| Comment: |
|
| Report: |
Contact us to know the TAT. |
| Usage: |
Fractional excretion of Sodium (FeNa) is the fraction of filtered sodium load that is reabsorbed by the tubules and is a measure of both the kidney’s ability to reabsorb sodium as well as endogenous and exogenous factors that affect tubular reabsorption. With prerenal azotemia, FeNa is usually <1% suggesting avid tubular sodium reabsorption. Low FeNa is often seen in Glomerulonephritis, hence should not be considered synonymous with intravascular volume depletion and should not be used as a sole guide for volume management. In ischemic AKI, FeNa is frequently >1% because of tubular injury and resultant inability to reabsorb sodium. |
| Doctor Specialty: |
Nephrologist |
| Disease: |
Disorders of Kidney |
| Components: |
*Creatinine, serum *Creatinine, urine *Sodium, serum *Sodium, urine |
| Courier Charges: |
0.00 |
| Home Collection: |
Available (*T&C Apply) |
| Department: |
Biochemistry |
| Pre Test Information: |
No special preparation required |
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