Griffiths C J, Cooper B G, Gibson G J
Department of Medical Physics, Freeman Hospital, Newcastle upon Tyne.
Thorax. 1991 Feb;46(2):136-40. doi: 10.1136/thx.46.2.136.
A system has been developed for investigating breathing during sleep that superimposes physiological signals on a video image of the patient, with the combined image plus sound recorded on video tape for later analysis. Signals normally displayed include oxygen saturation, airflow, chest wall motion, electroencephalogram, and electrooculogram; but others can be recorded if desired. The information is displayed on a timebase appropriate for the recognition and analysis of respiratory events during sleep. In addition, use is made of normally invisible video lines to record the analogue voltage waveforms so that on replay this information can be displayed on a fast timebase for analysing the more rapidly changing waveforms of electrophysiological signals. The system allows detailed polysomnography to be performed in the normal ward setting with the subject monitored overnight by the nursing staff. Subsequent analysis of the synchronised video, audio, and analogue signals allows measurement of the conventional indices obtained by polysomnography and aids their interpretation.
已开发出一种用于研究睡眠期间呼吸的系统，该系统将生理信号叠加在患者的视频图像上，并将组合图像和声音录制在录像带上以供后续分析。通常显示的信号包括血氧饱和度、气流、胸壁运动、脑电图和眼电图；但如有需要，也可记录其他信号。这些信息以适合识别和分析睡眠期间呼吸事件的时基显示。此外，利用通常不可见的视频线来记录模拟电压波形，以便在重放时，这些信息可在快速时基上显示，用于分析电生理信号变化更快的波形。该系统允许在普通病房环境中进行详细的多导睡眠图检查，由护理人员对受试者进行整夜监测。对同步的视频、音频和模拟信号进行后续分析，可测量通过多导睡眠图获得的传统指标，并有助于对这些指标进行解读。
