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We established and tested an unconstrained sleep apnea monitoring method using a polyvinylidene (PVDF) film-based sensor for continuous and accurate monitoring of apneic events occurred during sleep. Twenty-six sleep apnea patients and six normal subjects participated in this study. Subjects’ respiratory signals were measured using the PVDF-based sensor during polysomnography. The PVDF sensor comprised...
Pulse transit time (PTT) is a simple non-invasive method to evaluate vascular function using photoplethysmography (PPG) and electrocardiography (ECG). This study introduces unconstrained PTT measurement method for computer users and evaluates that. The proposed system consists of chair and mouse those can measure ECG and PPG respectability. PTT was defined as time delay between ECG R peak and PPG...
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