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Psychogenic polydipsia and water intoxication--concepts that have failed
Biological Psychiatry
|December 1, 1985
Summary
This study investigated Polydipsia, Intermittent Hyponatremia, and Psychosis (PIP) syndrome in 10 patients. Lithium treatment improved serum sodium levels in bipolar disorder patients, suggesting non-psychogenic causes for PIP syndrome.
Area of Science:
- Neuroscience
- Psychiatry
- Endocrinology
Background:
- Polydipsia, intermittent hyponatremia, and psychosis (PIP) syndrome presents a complex clinical challenge.
- The etiology of PIP syndrome, particularly the roles of polydipsia and water excretion, remains incompletely understood.
Purpose of the Study:
- To investigate the relationship between serum sodium levels and urinary water excretion in patients with PIP syndrome.
- To evaluate the efficacy of lithium in managing PIP syndrome and its impact on water balance.
Main Methods:
- Detailed analysis of serum sodium and urinary water excretion in 10 patients with PIP syndrome.
- Observation of treatment response to lithium in three patients with bipolar disorder and PIP syndrome.
Main Results:
- Lithium administration successfully improved serum sodium levels and reduced urinary water excretion in PIP patients with bipolar disorder.
- Observed changes in urinary water excretion did not fully account for the fluctuations in serum sodium levels across all PIP patients.
Conclusions:
- Findings challenge psychogenic explanations for polydipsia and excessive water intake in PIP syndrome.
- Results suggest that factors beyond simple water intoxication contribute to hyponatremia in PIP syndrome, supporting a potential organic basis.