DEVICE: Cadwell (00840067103654)

A battery-powered device assembly intended to continuously measure and record patient physiological parameters (e.g., arterial oxygen saturation level, pulse rate, respiration effort/pattern, airflow waveform) during sleep in the home, to facilitate the diagnosis of sleep apnoea [e.g., obstructive sleep apnoea (OSA)]. It includes primary components such as sensors (e.g., air pressure sensor) and/or a control unit which may have some user-interface functionality, and typically additional devices which may include a gas sampling face mask and/or connecting leads/cables; collected data is transferred to a central database or computerized device.

A mains electricity (AC-powered) device designed to record physiological signals from a sleeping patient to assess sleep disorders (e.g., insomnia, snoring or sleep apnoea). The device is typically computerized and usually records an electrocardiogram (ECG), electroencephalogram (EEG), chest wall motion, airflow at both the nose and the mouth, eye movements, haemoglobin oxygen saturation (SpO2) and electromyogram (EMG). Parameters may be added or omitted depending on the study being performed. The device includes multiple electrodes/sensors placed on the patient in specific areas as well as amplifiers and filters for recording.