Man G C, Kang B V
Department of Medicine, University of Alberta, Edmonton, Canada.
Chest. 1995 Aug;108(2):388-93. doi: 10.1378/chest.108.2.388.
To assess the sensitivity and specificity of a portable sleep apnea monitoring device (PolyG; CNS Inc; Chantassen, Minn) using standard polysomnography (PSG) as a gold standard.
The University of Alberta Hospitals Sleep Disorders Laboratory.
One hundred and four consecutive patients referred for assessment of sleep complaints.
Patients underwent simultaneous PSG and PolyG overnight recordings. The PSG included recordings of EEG, Chin electromyogram, electroculogram, ECG, oronasal airflow, thorax and abdomen respiratory movements, bilateral tibialis anterior electromyogram, and ear oximetry. The PolyG monitoring included oronasal airflow (thermistors), chest and abdomen pneumobelts, oximetry, ECG, and body position sensor. The raw data were screened and analyzed separately by two technicians without knowledge of results of the other system.
The coefficient of correlation for apnea index (AI) was 0.94. The r value for apnea-hypopnea index (AHI) was 0.97. Using the criteria of AI more than 5 as diagnostic for sleep apnea syndrome, 23 out of the 104 patients had the disease based on PSG results. Twenty-six patients had AI more than 5 based on PolyG results. The sensitivity was 82.6% and the specificity was 91.4%. The positive predictive value was 73.1% and the negative predictive value was 94.9%. The overall accuracy was 89.4%. Using the criteria of AHI more than 15 as diagnostic for sleep apnea syndrome, 28 of the 104 patients had the disease based on the PSG results. Twenty-four patients had AHI more than 15 based on PolyG results. The sensitivity was 85.7% and the specificity was 94.7%. The positive predictive value was 85.7% and the negative predictive value was 94.7%. The overall accuracy was 92.3%.
The PolyG monitoring device is useful in identifying patients without significant sleep apnea.
以标准多导睡眠图（PSG）作为金标准，评估便携式睡眠呼吸暂停监测设备（PolyG；CNS公司；明尼苏达州钱塔森）的敏感性和特异性。
阿尔伯塔大学医院睡眠障碍实验室。
连续104例因睡眠问题前来评估的患者。
患者同时进行整夜的PSG和PolyG记录。PSG包括脑电图、颏肌电图、眼电图、心电图、口鼻气流、胸腹部呼吸运动、双侧胫前肌电图和耳部血氧饱和度记录。PolyG监测包括口鼻气流（热敏电阻）、胸腹部呼吸带、血氧饱和度、心电图和体位传感器。原始数据由两名技术人员分别筛选和分析，他们均不知道另一个系统的结果。
呼吸暂停指数（AI）的相关系数为0.94。呼吸暂停低通气指数（AHI）的r值为0.97。以AI大于5作为睡眠呼吸暂停综合征的诊断标准，基于PSG结果，104例患者中有23例患有该疾病。基于PolyG结果，26例患者的AI大于5。敏感性为82.6%，特异性为91.4%。阳性预测值为73.1%，阴性预测值为94.9%。总体准确率为89.4%。以AHI大于15作为睡眠呼吸暂停综合征的诊断标准，基于PSG结果，104例患者中有28例患有该疾病。基于PolyG结果，24例患者的AHI大于15。敏感性为85.7%，特异性为94.7%。阳性预测值为85.7%，阴性预测值为94.7%。总体准确率为92.3%。
PolyG监测设备有助于识别无明显睡眠呼吸暂停的患者。
