| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 100 === In this thesis, we developed a low-power wireless blood pressure monitor system, which comprises a homemade blood pressure measuring device and a smartphone. The device uses single chip (Bluetooth Low Energy System on Chip, BLE SoC) to process the algorithm of blood pressure measurement and perform data transmission. Through the newest Bluetooth Low Energy interface, this device can send measured results to the smartphone. Therefore, users can see the systolic, diastolic, mean blood pressure and pulse rate information on the smartphone. Besides, the data transmission packet format is based on the standard Blood Pressure Profile specification. Therefore, it has high compatibility to communication with other devices.
The blood pressure measuring device can be divided into automatic and manual inflation mode in this thesis. It has very low power consumption and provides 4,400 measurements with a 220mAh battery in manual mode. For the reliability, the accuracy of pulse rate, systolic and diastolic blood pressures were verified by the CuffLink simulator. The accuracy of pulse rate is -1.13 ± 0.52 beats, the accuracy of systolic blood pressure is 0.69 ± 1.63 mmHg, and the accuracy of diastolic blood pressure is 0.20 ± 1.02 mmHg. In clinical trials, the systolic blood pressure average differences between our method and auscultation method is 2.66 ± 2.71 mmHg, the diastolic blood pressure average differences between our method and auscultation method is 3.42 ± 4.42 mmHg. As a result, this device has high accuracy for measuring blood pressure and pulse rate.
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