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Non-dipping phenomenon in children with monosymptomatic nocturnal enuresis
Aydin Kahraman1, Hasan Dursun, Sami Hatipoglu
1Division of Pediatrics, Dr Sadi Konuk Teaching and Medical Research Hospital, Istanbul, Turkey.
Insights
Children with monosymptomatic nocturnal enuresis often have elevated nocturnal blood pressure and a reduced day-to-night blood pressure difference. This "non-dipping" phenomenon may contribute to the development of enuresis nocturna.
Area of Science:
- Pediatric Nephrology
- Cardiology
- Sleep Medicine
Background:
- Monosymptomatic nocturnal enuresis is a common childhood condition with complex etiopathogenesis.
- Understanding contributing factors is crucial for effective management, especially for treatment-resistant cases.
Purpose of the Study:
- To investigate the association between nocturnal enuresis and 24-hour blood pressure profiles in children.
- To explore potential systemic factors contributing to enuresis nocturna.
Main Methods:
- Ambulatory blood pressure monitoring over 24 hours in 45 children with monosymptomatic nocturnal enuresis and 22 healthy controls.
- Comprehensive medical tests including blood counts, biochemistry, urinalysis, renin-aldosterone levels, and abdominal ultrasound.
Main Results:
- Children with nocturnal enuresis exhibited significantly higher nocturnal blood pressure levels compared to controls.
- A significantly lower day-to-night blood pressure difference (non-dipping) was observed in enuretic children.
Conclusions:
- Nocturnal enuresis may involve systemic factors beyond the urinary system.
- A non-dipping blood pressure profile is identified as a potential contributing factor in the pathogenesis of enuresis nocturna.
- Systemic evaluation is recommended for enuresis cases resistant to initial therapies.
Purpose:
Monosymptomatic nocturnal enuresis is a common disorder seen in childhood, and many factors play a role in its etiopathology to varying degrees. The aim of our study was to investigate the possible association between nocturnal enuresis and 24-h blood pressure profiles of enuretic children.
Methods:
A total of 45 children ranging in age from 6 to 15 years with monosymptomatic nocturnal enuresis and 22 age-matched healthy controls were enrolled in our study. The blood pressure measurement was made at 30-min intervals during a 24-h period via an ambulatory blood pressure measurement device. Both groups underwent medical tests that included a complete blood count, blood biochemistry profile, urinalysis and blood renin-aldosterone levels, and all study subjects received an abdominal ultrasound.
Results:
Statistically significant high nocturnal blood pressure levels were observed in our patients with monosymptomatic nocturnal enuresis compared with the control group (p < 0.05). The mean values of the day-to-night difference (dipping) in the systolic and diastolic blood pressure of the patients were significantly lower than those of control group (p < 0.05).
Conclusion:
Nocturnal enuresis should not only be accepted as a urinary system disorder. Possible systemic causative factors have to be examined, especially in patients that are resistant to first-line therapy. Based on the results of our study, we deduce that one of the factors that plays a role in the pathogenesis of enuresis nocturna is a non-dipping blood pressure profile (the "non-dipping" phenomenon).
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