Total Body Water (TBW) formula - ANSWERS-50% of body weight in women; 60%
in men
Phosphorus (normal range) - ANSWERS-2.5-4.5 mg/dL
Potassium (normal range) - ANSWERS-3.5-5.0 mEq/L
Magnesium (normal range) - ANSWERS-1.5-2.5 mg/dL
Severe HypoNatremia management - ANSWERS-1. Only hypotonic hyponatremia
requires treatment directed at sodium.
2. (<120 mEq/L): infuse 3% hypertonic saline to increase Na by 1-2/hr until rises
by 4-6mEq/L
3. Max correction: 8-12 mEq/L per 24hr period or 25 mEq/L per 48hrs.
4. Restrict fluids to 1000ml/24hrs except in hypovolemic
Moderate HypoNatremia Management - ANSWERS-1. Only hypotonic
hyponatremia requires treatment directed at sodium.
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