Performance and Evaluation of Smartphone Based Wireless Blood Pressure Monitoring System Using Bluetooth

In medical practice, blood pressure is intensively studied parameter and often measured for diagnosis at primary healthcare level. In this paper, the state-of-the-art Bluetooth technology has been used for designing an innovative wireless blood pressure monitoring system to display the systolic and diastolic blood pressure values on Android-based smartphone. A pilot study was undertaken on 12 healthy subjects to validate the performance of developed prototype by comparing with OMRON HEM-7111 and mercury sphygmomanometer. Comparison shows an accuracy of 98.63% and 97.13% with OMRON HEM-7111 and 98.99% and 98% with mercury sphygmomanometer for systolic blood pressure and diastolic blood pressure, respectively. Bias value in Bland-Altman plots gives good level of agreement within 95% confidence limits. The developed prototype device mean and standard deviation of differences is less than 5 and 8 mmHg, respectively, and it fulfills the recommendation criteria as per the requirement of the Association for Advancement of Medical Instruments protocol.