Causes of Hypernatremia - Differential Diagnosis

Inadequate water intake:

 • Lack of access to water

Extrarenal hypotonic fluid loss:

 • GI losses or perspiration

Renal concentrating defect:

 • Diuretics

 • Osmotic diuresis

 • Central diabetes insipidus

 • Nephrogenic diabetes insipidus

Excessive salt intake:

 • Hypertonic fluid administration



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