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WARM Wireless ECG Monitor

WARM Wireless ECG Monitor. Melvin Rivera Suárez Project Manager Alexis Ortiz Pérez Rafael Vega Díaz Wilfredo Bermúdez Soto. Issues. An estimated 80,700,000 American adults (one in three) have one or more types of cardiovascular disease

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WARM Wireless ECG Monitor

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  1. WARM Wireless ECG Monitor Melvin Rivera Suárez Project Manager Alexis Ortiz Pérez Rafael Vega Díaz Wilfredo Bermúdez Soto

  2. Issues • An estimated 80,700,000 American adults (one in three) have one or more types of cardiovascular disease • Every minute counts. For every minute heart failure goes untreated, unrecoverable damage occurs to the heart muscle

  3. Problem Statement • Current heart monitoring equipment is commonly stationary, available to patients at hospitals or at their house • Patients’ lifestyle often makes it difficult for them to access heart monitoring equipment. • Health care professionals need live data on the health of their patients to help them during emergencies

  4. Scope • Device • Measure the ECG wave form and analyze • Portable, wireless • Detect if the user is having a heart attack or any other heart problem. • Mobile phone • Receive the alert of the device and send a message to the persons previously selected • Beyond our scope • Power consumption optimization of the Analog circuit

  5. Objectives • Software optimization. Should be easy installable within a 15 minutes by Nov 2. • Have a working prototype by Nov 21. • Hand in a written system manual to the project manager for review. It should describe all the system functionalities and legal disclaimers by Nov 24. • Tests in different scenarios. This will help to detect any situation not considered in the design process by Nov 25.

  6. System Overview

  7. Hardware Block Diagram

  8. ECG Waveforms • Electrocardiogram: • Measure of the heart’s electrical activity • Heart Rate • PR Interval • QRS Duration • QT Interval • QRS Axis

  9. ECG Sensors • Ideally, any type of electric contact could be used • However, wearable, safe and reliable electrodes are desired for the final product • Standard medical ECG electrodes will be used • Two electrodes to be placed on the patient’s chest • Third electrode will be internal to the circuit: Virtual right leg driven

  10. Portable Patient Device • Analog Circuit • Instrumentation Amplifier: AD624 • Appropriate for amplifying small signals • High Gain: Adjustable up to 10K • High Common Mode Rejection Ratio: 80 dB @ unity gain • Low Noise: 4 nV/√Hz @1 kHz • Photo coupler: PS2506 • Electrically isolates the amplifier output signal from the rest of the device • System security measure • Band Pass Filter • Filters signals below 0.04 Hz to 150 Hz • Average heart signal is 50Hz to 70 Hz

  11. ECG Circuit

  12. Microcontroller • MSP430F149: Ultra low power 16 bit microcontroller • Responsible for all needed calculation of the ECG wave form • Provides the necessary synchronization of the system • Specs: • Supports clock rates up to 8MHz • 60 KB of flash ROM • 2 KB of RAM • 12-bit ADC • 2 DAC outputs, 2 UART (serial) ports, and 48 General Purpose IO (GPIO) pins

  13. Bluetooth Module • KCWireFree KC21Bluetooth module • Class 2 module • Average power dissipation: 2.5mW • Small and power efficient • 10m Range • Built in antenna

  14. Mobile Phone Software • Interface between the monitor and the patient • Holds emergency contacts, and alerts them in case of a heart attack • Development Platform: J2ME • JAVA as a development tool for Mobile devices • Development Tools • Eclipse, MicroEmulator, NetBeans

  15. Mobile Phone Initialization

  16. Mobile Phone Screens

  17. Mobile Phone Screens

  18. Microcontroller Software

  19. Team Organization • Hardware • Melvin Rivera • Rafael Vega • Software • Alexis Ortiz • Wilfredo Bermúdez

  20. Budget

  21. Risks • Hardware components damaged • Unavailability of components • Data lost or damaged • Computer Crash • Loss of a Team Member

  22. Project Impact • Environmental Issues • Battery Disposal • Legal Issues • Harmful Electromagnetic Interference • Social Impacts • Mobile Phone Radiation • Might give a false sense of security to a patient which condition really needs a direct hospital care

  23. Conclusion • Monitor heart status anytime, anyplace • Portable device can be worn and is easy to carry • Provides patients with reliable heart monitoring • Mobile phone software displays heart status • Provides patients with prompt medical assistance • Send an emergency message if user has a heart attack or any emergency situation. • Improve the time of an emergency response

  24. Questions?

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