Mykytyn I J, Sajkov D, Neill A M, McEvoy R D
Sleep Disorders Unit, Repatriation General Hospital, Daw Park, South Australia, Australia.
Chest. 1999 Jan;115(1):114-22. doi: 10.1378/chest.115.1.114.
We compared the validity of a new portable polysomnographic recorder against a laboratory-based polysomnographic system from the same manufacturer.
Simultaneous, full polysomnographic recordings from the portable device (PSGP) and the laboratory-based system (PSGL) were obtained using separate sets of sensors on 20 patients referred for investigation of sleep apnea.
After initial optimization of signals, the portable device was left unattended in 10 of the patients (to simulate home studies), while in the other 10 the signals were reviewed on a laptop computer screen and adjustments to electrode or sensor placement made as needed during the studies. Recordings were manually scored by a technologist blinded to the origin of the data.
The quality of signals was comparable between the PSGP and PSGL studies, apart from a slight decrease in respiratory signal quality during PSGP studies that led to reduced confidence in respiratory event scoring. SaO2 signal loss was also greater in unattended PSGP. There was good agreement between PSGP and PSGL for sleep variables and the apnea-hypopnea index (r=0.99). The periodic limb movement index was slightly lower during unattended PSGP. Blinded physician assessment of the records led to a recommendation for repeat studies due to poor signal quality in one (10%) attended and one (10%) unattended portable recording. There was no significant discordance between PSGP and PSGL in the final diagnostic formulations.
Portable polysomnography is a viable alternative to laboratory-based polysomnography and may be improved further by better sensor attachment.
我们比较了一款新型便携式多导睡眠图记录仪与同一制造商的基于实验室的多导睡眠图系统的有效性。
使用单独的传感器组，对20名因睡眠呼吸暂停接受检查的患者同时进行便携式设备（PSGP）和基于实验室的系统（PSGL）的全多导睡眠图记录。
在对信号进行初步优化后，10名患者的便携式设备在无人值守的情况下使用（以模拟家庭研究），而在另外10名患者中，信号在笔记本电脑屏幕上查看，并在研究过程中根据需要调整电极或传感器的位置。记录由对数据来源不知情的技术人员进行人工评分。
PSGP和PSGL研究中的信号质量相当，但PSGP研究期间呼吸信号质量略有下降，导致对呼吸事件评分的信心降低。在无人值守的PSGP中，SaO2信号丢失也更多。PSGP和PSGL在睡眠变量和呼吸暂停低通气指数方面具有良好的一致性（r=0.99）。在无人值守的PSGP期间，周期性肢体运动指数略低。由于一名（10%）有人员值守和一名（10%）无人值守的便携式记录信号质量差，不知情的医生对记录进行评估后建议重复研究。在最终诊断结果中，PSGP和PSGL之间没有显著差异。
便携式多导睡眠图是基于实验室的多导睡眠图的一种可行替代方法，通过更好的传感器连接可能会进一步改善。
