02206nas a2200313 4500008004100000245007100041210006900112300001600181490000700197520133800204653001901542653001301561653001501574653001701589653001001606653001601616653001801632653002501650653001701675653002001692653001101712653002601723100002701749700001501776700002201791700002401813700001801837856003701855 2013 eng d00aCuffless Differential Blood Pressure Estimation Using Smart Phones0 aCuffless Differential Blood Pressure Estimation Using Smart Phon a1080 - 10890 v603 a
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.
10aBlood pressure10acuffless10aEstimation10afinger pulse10aHeart10aMicrophones10amobile camera10aMobile communication10amobile phone10aSynchronization10aValves10avascular transit time1 aChandrasekaran, Vikram1 aDantu, Ram1 aJonnada, Srikanth1 aThiyagaraja, Shanti1 aSubbu, Kalyan uhttps://nsl.cse.unt.edu/node/147