Title page for etd-0229117-165555


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URN etd-0229117-165555
Author Meng-Chiao Tsai
Author's Email Address m033020112@student.nsysu.edu.tw
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Department Mechanical and Electro-Mechanical Engineering
Year 2016
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Design of a Wearable Blood Pressure Continuous Monitoring Device
Date of Defense 2017-03-13
Page Count 113
Keyword
  • Continuous blood pressure monitor
  • Tactile sensor
  • Pressure sensor
  • Strain sensor
  • Radial artery
  • Pulse wave signal
  • Abstract With the needs of long-term cares and personal health managements are increasing, the physiological monitoring system are urgent to be established. In physiological signals, the blood pressure is one of the most important signals. Both the mercury and electronic sphygmomanometers adopt inflated cuffs to oppress arteries for blood pressure measurements. The user who uses the cuff chronically or frequently suffers discomfort. Therefore, the cuff-type sphygmomanometers are not suitable for continuous blood pressure measurements.
      This study used a photonthmography (PPG) sensor and a piezoelectric strain sensor to measure the pulse signals from the radial artery and the forefinger tip. The length of the pulse transit time between the two signals is used to estimate the blood pressure. In this study, a push load distribution sensor composed of tactile sensors and pressure sensors has been developed. It provides the user’s skin boundary conditions that enhance the repeatability of wearing conditions to eliminate the signal errors caused by the different wearing conditions.
      In blood pressure measurement experiments performed with 10 subjects aged between 20 and 25 years, the estimation mean errors against a validated cuff-type blood pressure monitor were 2.90% (standard deviation of 22%) and -2.74% (standard deviation of 17%) at rest for systolic and diastolic pressures respectively. The estimation error will be reduced once the push load difference is controlled under 1 %.
    Advisory Committee
  • Yen,Chen-Wen - chair
  • Lu,Wen-Hsien - co-chair
  • Wang,Yu-Jen - advisor
  • Files
  • etd-0229117-165555.pdf
  • Indicate in-campus at 3 year and off-campus access at 3 year.
    Date of Submission 2017-03-29

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