Video Otoscope System

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Video Otoscope System

• Brad Baum, Hani Bou-Reslan,Meghan Olson
• BME 300/200
• October 18th 2002

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Client

• Murray Katcher, MD., PhDDepartment of Pediatrics
• University of Wisconsin - Madison

Advisor
Professor Willis Tompkins Department of
Biomedical Engineering University of Wisconsin -
Madison
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Overview

• Problem statement
• Background information
• Product design specifications (PDS)
• Design Alternatives
• Proposed Design
• Future Aspects
• Questions

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Problem statement

• Design Problem Allow multiple students to
  observe an ear image from an otoscope at once
• Used in teaching
• Digital in nature
• Little or no distortion

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Background Information

• Current accuracy of 25
• Need to examine color, light reflex, ear drum
  position, motion, landmarks
• Welch-Allyn Otoscope
• Current technique uses a dual eyepiece
• Only one student at a time
• Often hard to see into
• Image is reversed

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Current Technology

• Current Systems Available
• Dual Eyepiece, Video Systems
• 5000

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Key Design Aspects

• Multiple Viewers at once
• Not hinder Viewing, high resolution
• Must not harm the client or patient
• Easy to use
• Easily transportable
• Under 200

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Design Alternatives

• Camera directly in ear
• Camera inside of a current otoscope
• Lens-to-eyepiece adapter (LE-Adapter)
• Combined with a digital camera
• Combined with a small video camera

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Camera directly in ear
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• Advantages
• Light weight
• Easy to use
• Disadvantages
• Poor performance cannot perform required tasks
• Expensive for small enough camera

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Camera directly in Otoscope
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• Advantages
• Light weight
• Ergonomically shaped
• Projects image of ear on screen
• Has same performance as current otoscope
• Disadvantages
• Very Expensive
• Camera small enough w/ good enough resolution
• Very hard to build

Meditronic, 2002
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Our Choice LE-Adapter
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LE-Adapter showing side that fits onto camera
lens
LE-Adapter showing side that fits onto eyepiece
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• Advantages
• Versatile
• Otoscope can be used w/o the camera
• Projects image of ear on a screen
• Can be used w/ a digital camera or small video
  camera
• Cost effective and easy to build
• Disadvantages
• Added weight to system
• Could be bulky

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Design Matrix
poor average excellent
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Future Problems

• Unaffected viewing?
• Resolution?
• Distortion?
• Too bulky?
• Too heavy?

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Future Aspects

• Consider design ideas presented by rest of the
  group and decide on best one
• Build a prototype
• Test prototype in order to verify that it
  satisfies all design specifications

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Questions
Thanks