摘要
Aims:To assess the presence of a first night effect(FNE)in children and adolescents and to examine if a single night polysomnography(PSG)is sufficient for diagnosing obstructive sleep apnoea syndrome(OSAS).Methods:Prospective case study of 70 patients(group 1:2-6 years,n = 22;group 2:7-12 years,n = 32;group 3:13-17 years,n = 16)referred for OSAS.Diagnostic criteria for OSAS:one or more of the following:(1)obstructive apnoea index(OAI)≥1;(2)obstructive apnoea hypopnoea index(oAHI)≥2;(3)SaO2 ≤89%in association with obstruction.Results:In all age groups,but mainly in the oldest children,REMS increased during the second night,mainly at the expense of stage 2 sleep.The first night PSG correctly identified OSAS in 86%,91%,and 100%of the children for groups 1,2,and 3 respectively.This represents 9%false negatives for OSAS when only the first night PSG was used.All cases missed had mild OSAS,except for one with oAHI > 5 on night 2.There were also seven patients with OSAS on night 1 but with a normal PSG on night 2:all had oAHI < 5.Conclusion:There is a FNE in children and adolescents.A single night PSG is sufficient for diagnosing OSAS,but in cases with a suggestive history and examination and with a negative first night,a second night study might be advisable.
Aims： To assess the presence of a first night effect （FNE） in children and adolescents and to examine if a single night polysomnography （PSG） is sufficient for diagnosing obstructive sleep apnoea syndrome （OSAS） Methods： Prospective case study of 70 patients （group 1： 2-6 years, n = 22; group 2：7-12 years, n = 32; group 3： 13- 17 years, n = 16）referred for OSAS. Diagnostic criteria for OSAS： one or more of the following： （1） obstructive apnoea index （OAI）≥1; （2） obstructive apnoea hypopnoea index （oAHI）≥2; （3） SaO2≤89% in association with obstruction. Results： In all age groups, but mainly in the oldest children, REMS increased during the second night, mainly at the expense of stage 2 sleep. The first night PSG correctly identified OSAS in 86%, 91%, and 100% of the children for groups 1, 2, and 3 respectively. This represents 9% false negatives for OSAS when only the first night PSG was used. All cases missed had mild OSAS, except for one with oAHI 〉 5 on night 2. There were also seven patients with OSAS on night 1 but with a normal PSG on night 2： all had oAHI 〈 5. Conclusion： There is a FNE in children and adolescents. A single night PSG is sufficient for diagnosing OSAS, but in cases with a suggestive history and examination and with a negative first night, a second night study might be advisable.
