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UW-Madison BME 300 - Lecture Notes

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Open-source, low-cost, web-guided spirometer Team: Jeremy Glynn – Team Leader Jeremy Schaefer– Communications Andrew Dias – BWIG Andrew Bremer – BSAC Week: April 17 – April 23, 2009 Client: David Van Sickle, PhD Dept. of Population Health Sciences UW School of Medicine and Public Health Phone: (608) 719-9531 e-mail: [email protected] Advisor: Mitch Tyler 2156 Engineering Centers Building Phone: (608) 262-5112 e-mail: [email protected] Problem Statement Spirometers are used to diagnose many pulmonary diseases including chronic respiratory diseases that affect approximately 300 million people. Many of these people do not have access to a spirometer because current models are expensive and operation requires the presence of a trained technician. The purpose of this project is to develop a low-cost spirometer capable of measuring lung flows and volumes that can be used by patients without the aid of a trained technician. The project includes the physical design of the spirometer, software development, and designing a universal interface. We envision a first generation device that connects to a computer via a USB port and guides and coaches patients through the testing using digital audiovisual clips. As the procedures are performed, a combination of client and server software will graphically display flow and volume data, monitor and evaluate the quality of the maneuver, and instruct the subject when their performance needs to be corrected. The software should also carry out some rudimentary analysis and interpretation using algorithms that are freely available from the American Thoracic Society. Overall, we hope to develop a tool that would be widely affordable and would standardize pulmonary function measurements by delivering the same instruction and coaching across sites for the first time. Last Week’s Goals - Complete shop certification - Complete spirometer and testing apparatus construction - Begin flow testing and ZMD chip calibration - Film a portion of the A/V materialAccomplishments - All members obtained shop certification - Near completion of manufacturing spirometer - Filmed sample A/V clip - Met with client on 4/22 to update on progress - Scheduled meeting for 4/24 with David H. of ZMD This Week’s Goals - Complete manufacturing of spirometer immediately - Perform flow and volume testing using anemometer and standardized syringe - Adjust ZMD signal conditioning chip coefficients to correlate sensor output to known airflows - Edit A/V filming clip - Prepare for poster presentation Difficulties - Shop certification was a longer process than originally realized, thus we have had less time than hoped to manufacture the design, Team Effort Team Member Accomplishments Time (Hrs) Running Total (Hrs) Jeremy Glynn Class time, client meeting, integration of ZMD chip into design 4 44 Andrew Bremer Class time, BSAC, A/V coaching design, 5 44 Jeremy Schaefer Class time, A/V coaching design, 5 44 Andrew Dias Class time, website development, client meeting, integration of ZMD chip into design 4 44Project Schedule PROJECT TASKS AND PROGRESS Jan. February March April May 29 5 12 19 26 5 12 19 26 2 9 16 23 30 7 14 WORK Brainstorming Research Designing Prototype Selecting Prototype Obtaining Materials Building Prototype Testing Prototype Modifications DELIVERABLES PDS Mid-Sem. Report Mid-Sem. Presentation Final Report Final Presentation Weekly Reports Notebooks MEETINGS Team Meetings Client Meetings Advisor Meetings BSAC Meetings OTHER Web Page Special Lectures Expenses to Date: - STMicroelectronics KEIL STARTER KIT $189.70 - Pressure sensor order (Mar 1, 2009) – Freescale Semiconductor - $63.03 - Pressure sensor order (Mar 30, 2009) – Mouser Electronics - $40.83 - PVC materials for spirometer and test apparatus construction - $3.50 - Skywatch Explorer II Anemometer -


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UW-Madison BME 300 - Lecture Notes

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