Funding and Support
- KL2 and SUSTAIN Programs
- Pilot Project Awards
- Galvanizing Engineering in Medicine Awards
- MedGap Program
- Terms and Conditions for Support
The Galvanizing Engineering in Medicine (GEM) Awards is an initiative of ACTRI and UC San Diego Institute of Engineering in Medicine (IEM), supports projects that identify clinical challenges for which engineering solutions can be developed and implemented to improve health care. It is a collaboration between ACTRI and the Institute of Engineering in Medicine (IEM).
Leading this initiative are Gary S. Firestein, MD; Andrew McColloch, PhD; Shu Chien, MD, PhD; and Deborah Spector, PhD
The proposed work aims to decrease the barrier to regular blood pressure monitoring through enabling the use of common, everyday smartphones to measure a person’s blood pressure both through cost and convenience. The solution involves a low-cost plastic attachment to a smartphone that can convert any smartphone with a camera and touchscreen into a BP monitor without any additional electronics. We leverage a similar scientific premise as oscillometry performed at the brachial artery, but instead measured at the finger. By measuring blood pressure at the finger in this way, we don’t need to use an uncomfortable cuff, a major issue in compliance due to discomfort for an older adult. Prior scientific studies demonstrated that BP measured using oscillometry at the finger can be accurate within 10mmHg of BP measured at the upper arm.
In our work, we aim to replicate this measurement at the finger, but using sensors commonly found in average smartphones, namely a front facing camera and a touch screen. To perform oscillometry, it is necessary to measure the change in blood pulse volume and the pressure being applied to the artery. A core challenge of the work is to measure the pressure applied to the finger without specialized sensors. The insight that enables our innovation is the use of 3D printing technology. By creating a clip that goes over the phone with a 3D printed material against the screen, as the finger presses harder to apply higher pressure on the artery, we utilize the phone’s screen to measure the pressure applied. Subsequently, we can then measure blood volume at the finger using the smartphone camera to measure the blood flow dynamics at different pressure levels.