Table 1 Causes of polyuria

Solute Diuresis

• Diabetes mellitus

• High-protein tube feeding

• Excess isotonic or hypertonic saline infusion

Water Diuresis

• Central diabetes insipidus

• Nephrogenic diabetes insipidus

• Primary polydipsia

• Diuretic use

• Sickle cell disease

• Amyloidosis

• Sjögren syndrome

• Hypercalcemia

• Excess hypotonic saline infusion