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Chronic dehydration stone disease
O M Embon1, G A Rose, T Rosenbaum
1St Peter's Hospitals, London.
Insights
Chronic dehydration is a common cause of urolithiasis (kidney stones). Increasing water intake and dietary adjustments effectively treat this condition, leading to a low stone recurrence rate.
Area of Science:
- Nephrology
- Urology
- Metabolic Medicine
Background:
- Urolithiasis is a significant health concern.
- Chronic dehydration is an underrecognized cause of kidney stone formation.
- Metabolic stone clinics manage patients with complex stone disease.
Purpose of the Study:
- To investigate the prevalence and causes of chronic dehydration in urolithiasis patients.
- To evaluate the effectiveness of interventions for chronic dehydration-related urolithiasis.
- To assess the long-term stone recurrence rates after treatment.
Main Methods:
- Retrospective analysis of 819 patients from a metabolic stone clinic.
- Diagnosis of chronic dehydration in 132 patients (19%).
- Analysis of patient demographics, causes of dehydration, dietary factors, and treatment outcomes.
Main Results:
- Chronic dehydration identified as the cause in 19% of diagnosed urolithiasis patients.
- Primary causes included hot climate (62%), hot occupation, and low water intake.
- Dietary advice increased urinary volume significantly (1720 to 2475 ml/24h).
- Urinary calcium increased, while urinary oxalate remained unchanged.
- Low stone recurrence rate observed during a mean follow-up of 4.85 years.
Conclusions:
- Chronic dehydration is a prevalent and treatable cause of urolithiasis.
- Increasing water intake combined with dietary modification is an effective management strategy.
- This approach leads to favorable long-term outcomes with low recurrence rates.
Abstract:
A study was made of 819 patients attending a metabolic stone clinic. A firm diagnosis was made in 708 (86%) and in 132 of these (19%) the diagnosis was thought to be chronic dehydration. The records were available for study for 87 males and 11 females in the chronic dehydration group. The mean age at presentation was 43 years. The causes of chronic dehydration were hot climate (62%), with hot occupation and low water intake almost equal in second place. In patients with a single cause of chronic dehydration, 57% also had a dietary risk factor for urolithiasis and this was most commonly high oxalate intake. Following dietary advice, the mean urinary volume increased from 1720 to 2475 ml/24 h. This was accompanied by a rise in mean urinary calcium from 6.02 to 6.96 mmol/24 h, presumably due to the calcium in the additional water drunk. Urinary oxalate did not change significantly. The mean follow-up time was 4.85 years and the stone recurrence rate was low. It was concluded that chronic dehydration is a common cause of urolithiasis; this can be treated satisfactorily by increasing water intake plus dietary advice in certain cases.