gps enabled asthma inhaler(2) 1


2/17

PROJECT SUPPORTERSPROJECT SUPPORTERS

PhD, Medical Anthropology

Specific interest in asthma and allergy

Epidemic Intelligence Service officer for

Centers for Disease Control Special projects with National Asthma

Control Program

Currently at UW as a Health and SocietyScholar

Biomedical Engineering

Orthopedics and Rehabilitation

UW-CREATe

Advisor: Professor Mitch Tyler

Client: David Van Sickle


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INTELLECTUAL PROPERTYINTELLECTUAL PROPERTYSTATEMENTSTATEMENT

All information provided by individuals orDesign Project Groups during this, or

subsequent presentations, is the property ofthe researchers presenting this information.


4/17

CONTENTCONTENT

Problem Statement

Background

MotivationDesign Constraints

Design Solution

Current ProgressFuture Work

References


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PROBLEM STATEMENTPROBLEM STATEMENT

Create a device capable of:Tracking the usage of asthma inhalers

Transferring between medication dispensers

Noting time, date, and location ofexacerbations

Wireless transmission of subject data todatabase

Fall 2007-Spring 2008 Improve upon previous design

Create 4-5 prototypes

Gain approval to begin clinical trials


6/17

BACKGROUNDBACKGROUND

Asthma Chronic respiratory disease in which airways

are blocked due to allergy or inflammation

Over 20 million Americans currently suffer fromasthma

Global Positioning System (GPS) First developed for military

Widely used in communication, recreation, andsafety

Uses signal transmission time to triangulateposition


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8/17

Must meet FDA/IRB approval for use

Secure attachment for peripherals

Transferable between inhalers

Wireless

Battery powered

GPS accurate to 15ft

Low incidence of false positives

DESIGN SOLUTIONDESIGN SOLUTION


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DESIGN SOLUTIONDESIGN SOLUTION

Microchip

snoozes

Button

pushedChip powers

on and runs

program

Program

obtains GPS

coordinates

Send HTTP

request to web

server

Server formats

coordinates and

displays them on

map

rnet Explorer Browser.lnk


10/17

Proof of concept prototype and Google Maps-based web implementation

Problems:

No Python interpreter Laptop sent commands

Not wireless battery/power regulation issues

CURRENT PROGRESS: SPRINGCURRENT PROGRESS: SPRING20072007


11/17

Custom mapping software with SQL databasesearch function, with much thanks to the UW

Cartography Lab.


12/17

CURRENT PROGRESS: FALL 2007CURRENT PROGRESS: FALL 2007

Python programming Programs written

Python interpreter in chip is unreliable

Solution: External microcontroller

Wireless implementation Power system built:

Lithium ion battery, capacitor, and protection Zenerdiode

Circuit board schematic created for printingPCB board

Purchased waterproof housing for encasingdevice

Currently, seeking smaller alternatives

Smaller tactile ush button


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ESTIMATED COSTSESTIMATED COSTS

Estimated cost of solution GM862-GPS $183.95

Microcontroller $9.95

SIM card and service $39.95

Circuit Boards $29.95

Momentary button $19.95

Battery $14.95

Housing $14.95

TOTAL $312.65

Actual prototype cost more than this, but buyingin bulk may eventually cut that price

dramatically.


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FUTURE WORKFUTURE WORK

Use external microcontroller

Study power and current requirements

Test battery life

Research rechargeable battery circuits

Housing & button options

Circuit board printing

Creation of 4-5 additional prototypes

Clinical Testing


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REFERENCESREFERENCES

Asthma and Allergy Foundation of America

http://www.aafa.org

American Academy of Allergy Asthma andImmunology

http://www.aaaai.org

How Stuff Works: GPS

http://www.howstuffworks.com/gps.htm


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QUESTIONS?QUESTIONS?

Thank you for your time!Any questions?


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TESTING PROTOCOLSTESTING PROTOCOLS

1. Basic Function Analysis

2. Accuracy of Coordinate Retrieval

3. Accuracy of Dosage Detection

4. Program Execution

5. Power Regulation Over Time

6. Durability

7. Ease of Use8. Multiple Coordinate Acceptance of Website

9. Patient Safety Analysis

gps enabled asthma inhaler(2) 1

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