Lindner et al. have screened the database of a Viennese intensive care unit (ICU) to determine the prevalence of hypernatremia, its impact on mortality, and whether it affects length of stay.

Patients who develop hypernatremia (> 148 mEq/l) during the test without concentrating their urine (urine osmolality < 300 mOsm/kg) have either severe central or nephrogenic DI. These can be ...

The diagnosis of diabetes insipidus can be confirmed by continued hypotonic polyuria in the presence of hypernatremia and/or hyperosmolality. [8] Measurement of urine osmolality or specific ...