Sleep staging based on signals acquired through bed sensor
IEEE Transactions on Information Technology in Biomedicine - Special section on new and emerging technologies in bioinformatics and bioengineering
Accurate and Rapid QRS Detection for Intelligent ECG Monitor
ICMTMA '11 Proceedings of the 2011 Third International Conference on Measuring Technology and Mechatronics Automation - Volume 01
Adaptive Beat-to-Beat Heart Rate Estimation in Ballistocardiograms
IEEE Transactions on Information Technology in Biomedicine
Combining unobtrusive electrocardiography and ballistography for more accurate monitoring of sleep
BIBE '12 Proceedings of the 2012 IEEE 12th International Conference on Bioinformatics & Bioengineering (BIBE)
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An unobtrusive bed integrated system for monitoring physiological parameters during sleep is presented and evaluated. The system uses textile electrodes attached to a bed sheet for measuring multiple channels of electrocardiogram. The channels are also combined in order to form several additional ECG leads. One lead at a time is selected for beat-to-beat-interval detection. The system also includes force sensors located under a bed post for detecting respiration and movements. The movement information is also used to assist in heart rate detection and combining the ECG derived respiration information with respiration information derived from force sensors, is investigated. The authors tested the system with ten subjects in one hour recordings and achieved an average of 95.9% detection coverage and 99 percentile absolute error of 3.47 ms for the BB-interval signal. The relative mean absolute error of the detected respiration cycle lengths was 2.1%.