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Bladder reservoir reduced during sleep in nocturnal enuresis

22 Nov 2017

Wet nights appear to occur with considerable frequency in children with monosymptomatic nocturnal enuresis (MNE) and normal maximal voided volumes (MVV), with a nocturnal urine production well below their MWV and even <65 percent of estimated bladder capacity, according to a study.

The study included 103 children aged 5 to 15 years who were treated for MNE and had normal MVV on daytime frequency volume charts. Home recordings were completed for 2 weeks at baseline and during desmopressin dose titration.

Estimated nocturnal bladder capacity, on the other hand, was evaluated separately each night as the total nocturnal urine production causing a wet night. Estimated nocturnal bladder capacity was considered reduced if nocturnal urine production during the night was less than the MVV.

Of the children, 84 (82 percent) had at least one wet night. In this group, nocturnal urine production below the daytime MVV was indicative of a reduced estimated nocturnal bladder capacity. Mean percentage of wet nights with reduced estimated nocturnal bladder capacity was 49 percent. Response to desmopressin was reported in a total of 11 percent.

In the group of paediatric patients with frequently reduced nocturnal bladder capacity, 91 percent experienced wet nights, with nocturnal urine production <65 percent of expected bladder capacity.

The present data suggest that bladder reservoir dysfunction during sleep is relatively common in MNE, researchers said. As this abnormality may not be reflected on daytime recordings, night-time data with nocturnal urine must be collected.

Bladder reservoir dysfunction during sleep potentially explains treatment failure to desmopressin despite adequate antidiuretic response, researchers added.

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Most Read Articles
21 Jun 2017
Young children may learn deception for their benefit within 10 days, a new study shows. Moreover, the children’s capacities for hiding truthful information and for representing mental life determine the rate at which they learn deception.
05 Jul 2017
Intrauterine exposure to artificially sweetened beverage (ASB) contributes to an increase in birth size and in the risk of overweight or obesity at 7 years of age, a study has found.
19 Jul 2017
Mothers who have high consumption of refined grains during pregnancy are likely to have offspring with higher body mass index z score (BMIZ) and greater risk of overweight or obesity at age 7 years, a recent study has found.
16 Jul 2017
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