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  • AME Seminar

    Wed, Apr 28, 2021 @ 11:00 AM - 12:00 PM

    Aerospace and Mechanical Engineering

    Conferences, Lectures, & Seminars

    Speaker: Jing Liu, Postdoctoral Scholar Department of Aerospace and Mechanical Engineering USC

    Talk Title: Wearable Opto-mechanical System for Cardiovascular Monitoring: From Methodological Design to Device Development

    Abstract: Cardiovascular diseases (CVDs) are the leading cause of death and disability worldwide. There are about 47% of sudden cardiac deaths occurring outside a hospital, which reveals the demand for wearable medical devices that can monitor the cardiovascular risk factors of individuals frequently, accurately, and unobtrusively in their daily life. At the same time, the use of wearable medical devices allows healthcare givers to assess patient health conditions and provide medical guidance in a timely and non-contact way.

    The photoplethysmography (PPG) sensor composed of light-emitting diode and photodetector has been widely adopted by various wearable fitness trackers owing to its low cost, compact size and ease of use. However, so far, the applications of PPG are mainly limited to heart rate and blood oxygen saturation measurement. By utilizing the wavelength dependence of the light penetration depth into the skin, we have developed a multi-wavelength PPG (MWPPG) sensing approach which allows for probing blood pulsations in different types of skin blood vessels.

    In this talk, two MWPPG applications for cardiovascular monitoring will be presented: 1) cuffless arterial blood pressure measurement with a single MWPPG sensor; and 2) an opto-mechanical device equipped with an MWPPG sensor to enable arterial and capillary blood pressure measurement.

    Biography: Jing Liu is a postdoctoral scholar in the Department of Aerospace and Mechanical Engineering, University of Southern California. She received her Ph.D. in Electronic Engineering from the Chinese University of Hong Kong in 2018 and her B.S. degree in Computer Science from Wuhan University in 2014. Her main achievements include the inventions of multi-wavelength photoplethysmography for wearable blood pressure monitoring, which is under commercialization in the Hong Kong Technology Start-up Support Scheme for Universities Programme. Her current research interests are cardiac modeling, physiological signal processing, and machine learning for cardiovascular health informatics.

    Host: AME Department

    More Info: https://usc.zoom.us/j/97098541679

    Webcast: https://usc.zoom.us/j/97098541679

    Location: Online event

    WebCast Link: https://usc.zoom.us/j/97098541679

    Audiences: Everyone Is Invited

    Contact: Tessa Yao

    Event Link: https://usc.zoom.us/j/97098541679

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