Project
# | Title | Team Members | TA | Documents | Sponsor |
---|---|---|---|---|---|
9 | Wireless EKG/ECG |
Halim Park Juhyeon Lee Ye Li |
Pooja Bhagchandani | final_paper1.pdf other2.pdf photo1.png photo2.png presentation1.pdf proposal1.pdf |
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# Wireless EKG/ECG # Team Members: - Halim Park (halimp2) - Juhyeon Lee (jlee803) - Ye Lin (yel3) # Problem Conventional EKG/ECGs involve wires, which can be tedious to deal with, considering many cases of emergency situations where every second counts. 12 leads are usually needed for clinical diagnosis to know which part of the heart is behaving abnormally, and 10 electrodes are placed on the chest of a patient. Wires can tangle up and intrude the process of clinical diagnosis. # Comparison with existing products Apple Watch: can only monitor 1 lead (Lead I), hence not suitable for medical use. Zio Patch and BardyDx CAM : also can monitor only 1 lead Kardiomobile 6L: It can monitor 6 leads, but only the frontal plane leads (shown in blue below). It does not monitor the horizontal plane leads (V1~V6) which gives a horizontal view of the heart, and that is essential for accurate clinical diagnosis. ![EKG_leads](https://en.wikipedia.org/wiki/File:EKG_leads.png) # Solution Sponsored by medical student Kenny Leung, this project’s goal is to design a wireless device to measure EKG, eliminating issues associated with wires. This project aims to create the first device on the market that does not need the electrodes to be across the heart to obtain EKG data - using voltage difference between the electrodes. As Kenny describes: “ It uses a concept that is proven in research, called body surface potential mapping, which is at any point in time, every point in your chest has a different electric potential”. Our goal is to design and theoretically build a 12-lead wireless EKG. In this project, we will be developing two devices among the twelve as a starting point, since two are sufficient to test all the major technical aspects of the project (e,g,, wireless transmission, amplifying voltages, etc.). The design of the device is subject to change during the process. However, it is essential that each device should be attachable to the skin, where the disposable EKG patches should be removed and installed easily. # Solution Components ## Power Module The power module supplies power to the microcontroller and the amplifier. It should provide sufficient power or bias for desired behavior. ## Skin Patch Module The device is big enough to hold the necessary components, such as power supply and circuit board, and small enough to carry in an emergency situation. It also has some sort of mechanism to keep the patch on the body. This patch should be able to measure the voltage data that is to be processed by the rest of the subsystems ## Signal Amplification and Filtering For a typical EKG, the voltage reading ranges from 0.1mV to 10mV. In order to have these readings digitally, an amplifier should be designed. Moreover, research shows that data within the frequency range of 0 to 30Hz is desired, so a passive second-order low pass filter will be designed to filter out noises of the signal as well as noises from the power supply, which is typically around 60Hz. An oscilloscope will be used to determine the desired cutoff frequency. ## Data Transmission Module Reflecting on the previous semester’s analysis, we aim to use Bluetooth protocol to transmit data to the receiver. Each device should send the data measurements to the computer. It should keep the unit of transmission small enough for accurate and timely results (e.g, within 40 ms). One of the advantages of using Bluetooth is that the master receiving device can have multiple connections simultaneously. ## Data Visualization We will visualize the transmitted data (ideally in a form of the traditional EKG signal graph) after noise reduction. # Criterion For Success Successfully implement two devices that will be attached to a body Can transmit wirelessly at a small rate (ideally within 40 ms) Show a visual representation of the transmitted data (e.g., graph) on a monitor |