Abstract
Objectives: To evaluate the efficacy of intranasal desmopressin inhalation on nocturnal enuresis in patients with spinal cord injury (SCI) and to investigate the validity of maximal bladder capacity as the predictor of response to intranasal desmopressin inhalation. Design: Before and after interventional trial. Setting: University-affiliated hospital. Participants: 22 adults SCI with nocturnal enuresis were divided into 2 groups: the large bladder capacity group (bladder capacity, >250mL; n=11) and the small bladder capacity group (bladder capacity, <250mL; n=11). Intervention: All participants were treated with intranasal desmopressin, 10μg daily at bedtime for 4 weeks. Main Outcome Measures: Total volume of daily nocturnal incontinence and serum electrolytes. Maximal bladder capacities were measured by urodynamic evaluation. Results: After intranasal desmopressin inhalation, mean volume of nocturnal incontinence decreased significantly in the large bladder capacity group ( P<.05), but not in the small bladder capacity group ( P>.05). The mean maximal bladder capacity of responders was larger than that of nonresponders ( P<.05). Neither hyponatremia nor serum electrolytes abnormalities occurred. Conclusions: Intranasal desmopressin inhalation is safe and effective in symptomatic management of neurogenic bladder dysfunction in selected patients with SCI. Maximal bladder capacity is a valuable predictor of response to desmopressin.
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