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Peak Inspiratory and Expiratory Flow Meter

Peak Inspiratory and Expiratory Flow Meter . Team: Andrew Eley, Sarah Offutt, Darshan Patel, Eric Bader BME 200/300 October 14, 2005. Client: Christopher G. Green, MD Pediatric Pulmonology UW Hospital Advisor: John Webster, Ph.D. Dept. of Biomedical Engineering University of Wisconsin.

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Peak Inspiratory and Expiratory Flow Meter

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  1. Peak Inspiratory and Expiratory Flow Meter Team: Andrew Eley, Sarah Offutt, Darshan Patel, Eric Bader BME 200/300 October 14, 2005

  2. Client:Christopher G. Green, MDPediatric Pulmonology UW HospitalAdvisor:John Webster, Ph.D.Dept. of Biomedical EngineeringUniversity of Wisconsin

  3. Overview • Problem Statement • Background • Proposed Designs • Future Work • Questions

  4. Problem Statement • To make an inspiratory and expiratory peak flow meter • Improve diagnoses of Vocal Chord Dysfunction • Easy to use • Must be durable • Easy to Carry • Inexpensive

  5. Background • Asthma • Exhaling, lower airways • Caused by external triggers • Treated with medications • Vocal Chord Dysfunction • Inhaling, upper airways • Possible causes, exercise, nervousness • Treated with speech therapy

  6. Background…Continued • Expiratory Flow Meters, use to monitor asthma • Exhaling force moves plunger • Portable • Measured in Liters/Second • Breathing Zones • Inspiratory Flow Meter

  7. Alt. Design 1: Double Barrel • How it works • two springs/plungers • Pushes indicator arrow • Seals • Independent scales

  8. Alt. Design 1: Double Barrel • Advantages • Combination expiratory-inspiratory flow meter • Simple device using springs and disks • No use of electricity • Ease of cleaning • Easy to use • Disadvantages • Bulky • Faster wear of parts • Failure of seals

  9. Alt. Design 2: Taser • How it works • Drag plate • bidirectional • Strain gauge • Digital display

  10. Alt. Design 2: Taser • Advantages • Compact design • Easy to read display • Accurate result • Easy to use • Disadvantages • Complex device • Electrical components • Heavy • High cost • Difficulty cleaning

  11. Proposed Design: Sniper • How it works • Dual Action • Inhaling/Exhaling • Pressure difference pushes plunger • Indicator Arrow

  12. Proposed Design: Sniper • Advantages • Combination expiratory-inspiratory flow meter • Simple device using springs and disks • No use of electricity • Safe – clear plastic • Ease of cleaning • Easy to use • Disadvantages • Little Longer in length

  13. Design Matrix

  14. Future Work • Finalize dimensions and materials • Build Final Prototype • Test Prototype • Calibration

  15. Questions?

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