[Analysis of continuous polysomnography in children with recurrent vertigo].

Objective: To explore the relationship between sleep status and the disease in children with recurrent vertigo（RVC） by analyzing the objective sleep condition of children with recurrent vertigo. Methods: According to the diagnostic criteria of RVC, 50 children with RVC and 20 normal controls without RVC were selected. According to the vertigo questionnaire score, the RVC group was divided into mild, moderate and severe groups according to severity. Continuous polysomnography（PSG） was performed for all participants, and SPSS 25.0 statistical software was used to analyze the monitoring results. Results: ①There were significant differences in sleep time of each period, total sleep time and sleep efficiency between RVC group and control group（ P <0.05）, but there was no significant difference in sleep latency（ P >0.05）. The specific manifestations were that the proportion of sleep time in N1 and N2 phases increased, the proportion of sleep time in N3 and REM phases decreased, the total sleep time and sleep efficiency decreased in RVC group. ②The abnormal rate of sleep apnea hypopnea index, that is, the proportion of AHI≥5 times/h and the abnormal rate of lowest blood oxygen saturation in RVC group were higher than those in normal control group. There was significant difference between the two groups（ P <0.05）. ③There were significant differences in the proportion of AHI≥5 times/h and lowest SpO2 among mild group, moderate group and severe group（ P <0.05）. ④There was no significant correlation between the degree of vertigo and the abnormal rate of AHI in children with RVC, but there was a negative correlation between the degree of vertigo and the abnormal rate of lowest SpO2 in children with RVC. Conclusion: Children with RVC are often accompanied by sleep disorders, clinicians should pay attention to both the symptoms of vertigo and sleep condition in children. Polysomnography is non-invasive and operable, providing a new idea to the auxiliary examination of RVC in children. It is of certain clinical significance for the comprehensive treatment of children with RVC to actively improve vertigo symptoms and pay attention to improving sleep quality.