June 15, 2019
June 15, 2019
June 19, 2019
Medical devices that communicate with cell phones are considered essential elements of a healthcare-delivery enterprise focused on personalized medicine. The technical development tools that promote the creation and use of such systems are similar in nature to emerging makerspace tools. These toolsets allow hobbyists and other individuals with limited formal training to piece together technical gadgets with hardware components that offer simple, standardized interfaces with easy to use software libraries. In an earlier publication, the authors presented a wearable electrocardiograph (ECG) project for a Fall 2017 senior-level undergraduate biomedical instrumentation course sequence – a project that integrated makerspace ideas with circuit-level design concepts traditionally utilized in such upper-level instrumentation courses. For that project, each student was tasked with designing a wearable electrocardiograph that communicated with a cell phone via a Bluetooth Low Energy (BLE) link. They were responsible for the analog/digital circuitry, the board layout, the 3D-printed case, and the cell phone app that received those BLE transmissions. This paper describes a revised Fall 2018 offering of that project, where various project elements have been improved to promote student learning and to realize a larger percentage of working designs. Updated elements include a more flexible instrumentation amplifier, simplified printed circuit board (PCB) design guidelines, a new wireless module, and an altered design/test schedule. As before, student performance was assessed in light of specific learning objectives, and differential values from new pre/post-project surveys were compared to commensurate values from the previous project offering to quantify changes in students’ self-perceptions of learning driven by changes in the project-delivery process. These comparisons indicate that project updates maintained student learning while increasing the likelihood that a given student could implement a suitable level of wearable electrocardiograph functionality.
Carlson, C., & Ren, D. X., & Warren, S. (2019, June), An Improved Cellphone-based Wearable Electrocardiograph Project for a Biomedical Instrumentation Course Sequence Paper presented at 2019 ASEE Annual Conference & Exposition , Tampa, Florida. 10.18260/1-2--32064
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