Study on sleep structure and respiratory characteristics of children with nocturnal enuresis through overnight polysomnography
Objective:To investigate the sleep and respiratory characteristics and its related factors in children with nocturnal enuresis(NE).Methods:A total of 45 children with NE from June 2021 to March 2023 were col-lected.They were categorized into monosymptomatic nocturnal enuresis(MNE)and non-monosymptomatic noc-turnal enuresis(NMNE)groups.A control group contains 25 children without lower urinary tract dysfunction.All-night polysomnography(PSG)monitoring and a 7-day urination diary were carried out in all children.Results:Compared with the control group,NE group showed an increase in sleep apnea hypopnea index(AHI),body mass index standard score(BMI z-score),and cortical arousal index(CAI)(P＜0.05).There were no significant differ-ences in blood oxygen saturation or mean blood pressure among the three groups(P＞0.05).The NMNE group showed a significant increase in sleep time and CAI during the light sleep phase in non-rapid eye movement sleep([61.1±9.5]％vs[48.0±10.6]％,[10.5±4.2]times/h vs[8.6±2.8]times/h,P＜0.001).Additionally,the average heart rate significantly decreased([69.5±5.7]times/min vs[82.7±4.3]times/min,P＜0.001).The BMI z-score of the NMNE group was higher than that of the MNE group([1.7±0.5]vs[1.4±0.4],P＜0.001).Both CAI and AHI were positively correlated with the days of enuresis per month(r=0.848,P＜0.001;r=0.466,P=0.001).Conclusion:Sleep breathing disorder in children with NE is common,and the incidence is associated with daytime lower urinary tract symptoms,severity level of NE and obesity in children with NE.
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