Transcript 3 #2 #1 - CAE Users - University of Wisconsin–Madison

Eye Dropper Device
DeLorme, J.J., Hanson, E.E.,
Weisshaar, C.L., Wentland, A.L.
Dept. of Biomedical Engineering
University of Wisconsin – Madison
Client: Lynn Buhmann
Advisor: Willis Tompkins
University of Wisconsin - Madison
Biomedical Engineering Design Courses
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Overview of Presentation
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Motivation/Background
Current eye dropper devices
Problem statement
Design alternatives
Decision matrix
Future plans
Questions?
Motivation/Background
• Common eye diseases:
– Glaucoma
– Macular degeneration
– Cataracts
• Patients need several different eye drop
medications daily
Motivation/Background
• Difficulty delivering eye drops due to
– Tremors
– General loss of dexterity
• Because of these etiologies
– Medication is wasted
– Wasted medication increases patient cost
Current products
• Owen Mumford Autodrop/Autosqueeze Devices
• Assists the patient with administering the drop
• Fails to control the amount administered
Problem Statement
• To develop an eye drop device that can
– Administer one drop of medication
– Assist the user in placing the eye drop into the eye
– Accommodate different types of medications (different
bottle sizes)
– Conserve medication to reduce cost
Design 1
• Advantages
– Simple design
– Low cost
– Prevents streaming
• Disadvantages
– Numerous unknown
parameters
– Sensitive system
– Contamination
possibilities exist
Design 2
Design 2
• Advantages
– Simple design
– Low cost
– Easy to operate
• Disadvantages
– Medication could
become contaminated
– Surface adhesion may
pose a problem
Design 3
Design 3
• Advantages
– Simple design
– Low cost
– Can administer a
single drop
– Highly controllable
• Disadvantages
– Multiple drops still
possible if incorrectly
set up
– Difficulty cleaning
device
– Must be calibrated (or
set up) for different
bottles
Design Matrix
#1
#2
#3
Simplicity
1
2
2
Ease of use
1
2
1
Cost
1
3
2
Safety
2
1
1
Sterility
3
2
1
Accuracy
3
1
2
Total
11
11
9
1 = good
2 = medium
3 = poor
Future plans
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Finalize eye dropper design
Construct a prototype
Test the device on different bottle sizes
Test accuracy (1 drop) and consistency
Evaluate the difficulty in calibrating to
different bottle sizes
Questions??