Full polysomnography in the home

Abstract

Study Objectives: To evaluate unattended full polysomnography (PSG) recorded in the home by the DigiTrace Home Sleep System (DHSS) and to assess the ability to acquire, store and analyze polysomnographic data using the DHSS compared to standard paper PSG. Design: Part 1 used a prospective, cross-over design. Part 2 consisted of a prospective concurrent collection of polysomnographic data. Setting: Sleep Disorders Center in a university medical center. Participants: All adult patients who required standard clinical PSG as part of their clinical evaluation, regardless of suspected diagnosis, except patients requiring video recording for abnormal behaviors. Measurements and Results: The DHSS is a digital recording system with miniature preamplifiers and the capacity to record 18 channels of polysomnographic data, including 4 channels of EEG (C3-A2, C4-A1, C3- O1 and C4-O2), right and left EOG, two channels of chin EMG, ECG naso- oral airflow, respiratory effort (piezo crystal thoracic and abdominal belts and bilateral intercostal EMG), snore microphone, bilateral anterior tibialis EMG, and body-position sensor. In part 1, 77 DHSS home recordings were evaluated. No recordings were lost due to equipment failure and each parameter was scorable in greater than 95% of all epochs. Most of the subjective assessments by questionnaire following each study revealed no difference between the two testing situations. However, patients reported more sleep time and a better overall test experience in the lab. Assessments of sleep quality and morning alertness compared to usual were rated higher in the lab. After completing both studies, more patients preferred the lab study (p