1. Accessible Incontinence Device
Arin Ellingson, Marty Grasse, Jon Sass, Ben Schoepke, Dave Schurter
RERC –AMI National Design Competition
Advisor: Mitchell Tyler
A rin

2. INTELLECTUAL PROPERTY STATEMENT
University of Wisconsin - Madison Biomedical Engineering Design Courses
INTELLECTUAL PROPERTY STATEMENT
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Anyone to whom this information is disclosed:
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2) Agrees not to use this information for any other purpose unless given written approval in advance by the Project Group, the Client / SDC, and the Advisor.
3) Agrees to keep this information in confidence until the relevant parties listed in Part (2) above have evaluated and secured any applicable intellectual property rights in this information.
4) Continued attendance at this presentation constitutes compliance with this agreement.
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3. Outline Problem Statement Background on Incontinence
Design Requirements
Accessibility
Design Overview
Monitoring Bladder Status
Display
Microcontroller
Pinch Valve
Future Work
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4. Problem Statement Incontinence: inability to control urine flow.
Affects men and women, occurs more frequently with increasing age.
Can cause infection, skin irritation, and embarrassment.
Many patients avoid activities in public.
A rin State motivation of project
Negatively impacts quality of life
Targeting active people

5. Background
[1]

6. Background cont… Prevalence in US: > 10 million [2]
15-30% of geriatric population
85% of those affected are women
$36 billion in related costs annually
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7. Design Requirements Allow voluntary emptying of the bladder
Prevent undesired urine flow
Provide an indication of bladder status
Remain indwelling for up to 30 days with no adverse tissue reaction or material degradation
Be easily used by a patient with disabilities
Dave

8. Accessibility
Target audience: individuals with sensory-motor, physical and/or cognitive disabilities
Display/alerts should target multiple sensory receptors
Programmable by user to meet their needs
Will meet ADA guidelines for visual and audible alarms
Dave
Parkinsons, neurological disorders
universal design
[3]

9. Design Overview Foley catheter Our device: Attaches to catheter
Flow valve
Bladder monitor
Controller/user
display
J on
[4]

10. Design Logic Bladder Status Microcontroller Valve Indicator User
Interface
Do Nothing
VALVE
CONTROLLER
CATHETER
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11. Bladder Status Monitor
Need to measure bladder volume
Possible methods
Ultrasound
Mechanical
Bladder pressure
J on
Liquid pressure sensor [5]

12. Bladder Volume vs. Pressure
Voiding
Filling
J on
[6]

13. Display Physical specs Functionality Belt-mounted and unobtrusive
Houses batteries, microcontroller, user feedback devices
Functionality
Controls valve and processes bladder monitor data
User interface
Input: flow control switch, alert toggles
Output: Visual, aural, and tactile feedback to indicate bladder status
B en

14. Microcontroller Parallax BASIC Stamp 2
Pros: easy to program, many I/O pins, low power
Cons: limited memory, expensive
B en
[7]

15. Pinch Valve
Marty
-pinch valve  no contact with urine, avoid crystallization caused by urea
-simply clamps down on silicone catheter, cutting off flow
-NO – safety
-NC – significant power savings, mechanical override for safety? Max pressure it can withstand
-ASCO valves, 6 VDC, 12 VDC, 24 VDC options
-battery implications?
-hold with thigh strap
-mention previous group’s work?
[8]

16. Future Work This semester Next semester
Determine how to monitor bladder status
Design controller and user interface
Build and validate functional prototype
Next semester
Implement controller into battery-powered embedded system
IRB approval for human subjects testing
Create website for competition
Marty

17. References http://www.urologyteam.com/Images/incintinence2.gif
M. Malbrain and D. Deeren, “Effect of bladder volume on measured invtravesical pressure: a prospective cohort study,” Crit. Care, vol. 10, no. 98.

18. Acknowledgements Questions? Wade Bushman, M.D., Ph.D.
Naomi Chesler, Ph.D.
Michael Malone, M.D.
Abby Frese, R.N.
Questions?