Department of Computer Science, University of North Texas, Denton, TX 76203, USA.
IEEE Trans Biomed Eng. 2013 Apr;60(4):1080-9. doi: 10.1109/TBME.2012.2211078. Epub 2012 Aug 1.
Smart phones today have become increasingly popular with the general public for their diverse functionalities such as navigation, social networking, and multimedia facilities. These phones are equipped with high-end processors, high-resolution cameras, and built-in sensors such as accelerometer, orientation-sensor, and light-sensor. According to comScore survey, 26.2% of U.S. adults use smart phones in their daily lives. Motivated by this statistic and the diverse capability of smart phones, we focus on utilizing them for biomedical applications. We present a new application of the smart phone with its built-in camera and microphone replacing the traditional stethoscope and cuff-based measurement technique, to quantify vital signs such as heart rate and blood pressure. We propose two differential blood pressure estimating techniques using the heartbeat and pulse data. The first method uses two smart phones whereas the second method replaces one of the phones with a customized external microphone. We estimate the systolic and diastolic pressure in the two techniques by computing the pulse pressure and the stroke volume from the data recorded. By comparing the estimated blood pressure values with those measured using a commercial blood pressure meter, we obtained encouraging results of 95-100% accuracy.
如今，智能手机因其多样化的功能，如导航、社交网络和多媒体设施，越来越受到大众的欢迎。这些手机配备了高端处理器、高分辨率摄像头和内置传感器，如加速度计、方向传感器和光传感器。根据 comScore 的调查，26.2%的美国成年人在日常生活中使用智能手机。受这一统计数据和智能手机多样化功能的推动，我们专注于将其用于生物医学应用。我们提出了一种新的智能手机应用，利用其内置的摄像头和麦克风取代传统的听诊器和基于袖带的测量技术，来量化心率和血压等生命体征。我们提出了两种使用心跳和脉搏数据估算血压的差分技术。第一种方法使用两部智能手机，而第二种方法则用一个定制的外部麦克风替换其中一部手机。我们通过计算从记录的数据中得出的脉搏压和心排量，来估算这两种技术中的收缩压和舒张压。通过将估计的血压值与使用商业血压计测量的值进行比较，我们得到了令人鼓舞的 95-100%的准确率。
