Jeger-Madiot Nathan, Gateau Jérôme, Fink Mathias, Ing Ros-Kiri
ESPCI ParisTech, PSL Research University, CNRS, Université Pierre et Marie Curie, Institut Langevin, 1 rue Jussieu, F-75005 Paris, France.
ESPCI ParisTech, PSL Research University, CNRS, Université Pierre et Marie Curie, Institut Langevin, 1 rue Jussieu, F-75005 Paris, France.
Med Eng Phys. 2017 Dec;50:96-102. doi: 10.1016/j.medengphy.2017.09.003. Epub 2017 Oct 17.
We present a novel non-contact system for monitoring the heart rate on human subjects with clothes. Our approach is based on vibrocardiography, and measures locally skin displacements. Vibrocardiography with a laser Doppler vibrometer already allows monitoring of this vital sign, but can only be used on bare skin and requires an expensive piece of equipment. We propose here to use an airborne pulse-Doppler ultrasound system operating in the 20-60 kHz range, and comprised of an emitter focusing the ultrasound pulses on skin and a microphone recording the reflected waves. Our implementation was validated in vitro and on two healthy human subjects, using simultaneously laser vibrocardiography and electrocardiography as references. Accurate measurements of the heart rate on clothed skin suggest that our non-contact ultrasonic method could be implemented both inside and outside the clinical environment, and therefore benefit both medical and safety applications.
我们提出了一种新颖的非接触式系统，用于监测穿着衣服的人体的心率。我们的方法基于振动心电图，测量局部皮肤位移。使用激光多普勒振动计的振动心电图已经可以监测这一生命体征，但只能用于裸露的皮肤，并且需要昂贵的设备。我们在此提议使用工作在20 - 60kHz范围内的机载脉冲多普勒超声系统，该系统由将超声脉冲聚焦在皮肤上的发射器和记录反射波的麦克风组成。我们的实施方案在体外以及两名健康人体受试者身上得到了验证，同时使用激光振动心电图和心电图作为参考。在穿着衣服的皮肤上准确测量心率表明，我们的非接触式超声方法可以在临床环境内外实施，因此对医疗和安全应用都有益处。
