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Detection of bed-exit events using a new wireless bed monitoring assistance

par Bruyneel, Marie ;Libert, Walter;Ninane, Vincent
Référence International journal of medical informatics, 80, 2, page (127-132)
Publication Publié, 2011-02

Article révisé par les pairs

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Résumé :

Objectives: To assess, using complete polysomnography as the gold standard, the capability of Heasys®, an innovative wireless bed monitoring assistance to record body movements and presence and to infer bed-exit events and body position changes at night. Design: Descriptive study. Settings: Sleep laboratory for patient's recording and home for healthy volunteers. Participants: Twelve patients referred for suspicion or treatment of sleep disordered breathing and 5 healthy subjects. Measurements: Complete polysomnography was recorded during one night in patients and during two nights in healthy volunteers. Heasys® sheet was placed under the fitted bed sheet to allow concomitant recording. During the second night, healthy subjects were asked to get out of bed at least 2 times for a minimal duration of 3min. Results: Heasys® allowed the detection of all bed-exit events in patients and volunteers (sensitivity: 100%, and specificity: 85%). When bed-exit events were defined by the lack of the presence signal combined with absence of motion and a dip in temperature, sensitivity and specificity of Heasys® were 92 and 100%, respectively. In patients and volunteers, Heasys® detected body position changes recorded by polysomnography respectively, in 84 and 98% of the cases. Additional recorded motions were mainly related to leg movements or arousals. Conclusion: In this small feasibility study, Heasys® seemed to be an effective innovative device allowing bed-exit events detection in adult patients and healthy volunteers. © 2010 Elsevier Ireland Ltd.