Live demonstration: Pulse transit time measurement on a modified weighing scale for cuffless blood pressure estimation
| Autor: | Omer T. Inan, Andrew M. Carek, Jordan Conant |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Heartbeat business.industry Acoustics 0206 medical engineering Electrical engineering 02 engineering and technology 020601 biomedical engineering Signal law.invention 03 medical and health sciences 0302 clinical medicine Pressure measurement Data acquisition law Photoplethysmogram Waveform Instrumentation amplifier business 030217 neurology & neurosurgery Strain gauge |
| Zdroj: | 2016 IEEE SENSORS. |
| DOI: | 10.1109/icsens.2016.7808572 |
| Popis: | The demonstration setup will include a modified weighing scale with an analog circuit built into the device, a National Instruments myRIO system for data acquisition, and a laptop for visualization of the data and implementation of the demo. The weighing scale measures the ballistocardiogram (BCG) signal — the reaction forces of the body to ejection of blood from the heart into the vasculature and movement of the blood through the vascular tree [1] — as well as a reflectance mode photoplethysmogram (PPG) from the top of the foot, representing the local blood volume pulse [2]. The BCG is measured from the strain gauges built into the scale, interfaced to a low noise instrumentation amplifier and filter circuit for amplifying the AC component of bodyweight which fluctuates synchronously with the heartbeat. The reflectance PPG is measured using a custom strap that we have developed, including an array of photodiodes and light emitting diodes (LEDs) for illuminating the top of the foot — close to the dorsal artery — and measuring the changes in reflectance at that location associated with the blood volume pulse. The time delay from the BCG I-wave to the PPG waveform foot is pulse transit time (PTT), and we have shown in previous work that this measurement of PTT is correlated to the subject's blood pressure [3]. |
| Databáze: | OpenAIRE |
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