Interactive Free Water Deficit calculator. Requires the calculator gadget.
Usage: {{Free Water Deficit Calculator}}
Free Water Deficit
Free Water Deficit in Hypernatremia
| Parameter
|
Value
|
| Weight (kg)
|
|
| Sex
|
1 Male (TBW = 0.6) Female (TBW = 0.5)
|
| Elderly/Child
|
1 No Yes (TBW −0.1)
|
| Current Serum Sodium (mEq/L)
|
|
| Free Water Deficit
|
L
|
Notes
- Formula: FWD = TBW × [(Current Na / 140) – 1]
- TBW = Weight × correction factor (Male 0.6, Female 0.5; reduce by 0.1 for elderly)
- Correction rate: Do not decrease Na by >10–12 mEq/L per 24 hours to avoid cerebral edema.
- Adrogué HJ, Madias NE. Hypernatremia. N Engl J Med. 2000;342(20):1493-1499. PMID 10816188.
|
