Transcript Medication Adherence

Team Members
Cara Dunn
Farshad Fahimi
Sujan Bhaheetharan
Nipun Yamdagni
Advisor
William L. Murphy
Assistant Professor, Department of Biomedical
Engineering
Client
Timothy Juergens, M.D.
UW/VA Hospitals – Geriatric psychiatrist/Sleep
specialist
Problem Statement
 Construct a device with the ability to record
time & date information during daily
operation of a patient’s standard medication
box.
 Stationary alarm should be attached in order
to alert the user to take medication.
 Information should be easily accessed on a
computer for the client and patient to
discuss, in efforts to ensure proper
adherence.
Client Requirements
 Device must obtain data regarding patient’s
adherence of their medications.
 Lightweight and durable.
 An alarm should alert patient
 Total prototype cost may not exceed $300.
 Normal use, includes cleaning the device,
may not interfere with recording.
 Must consume low amounts of power.
Motivation & Significance
 Compliance: Taking correct amount of the
prescribed medicine at the correct time.
 Medicine is only helpful when taken correctly.
 Only 24% of people take their medicines
correctly.
 Non-compliance causes 125,000 deaths per
year in the USA.
Last Semester’s Design
 Texas Instruments MSP430
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microcontroller with
development kit
Program in C language
Recognized open
compartments
Used a 7x4 pill box
Switches activated by
compartment
Lids
 Activation recorded by the
microcontroller
 Switch matrix utilized
Design Limitations
 Only had 2x2 switch matrix
 Switches were not always

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activated
No time-keeping method
Lack of sleep function
Parallel port interface
No computer software for
interface with pillbox
Cost
 The MSP430 microcontroller is
too expensive for our need
Overview of Current Design
 Altered existing parts
 Switches
 7x4 Pill Box
 Adding new functionality
 Power saving functionality
 Accurate time keeping
 USB Interface
 Smaller than previous
design
 Computer interface
Solution to Switch Problem
 Altered individual lids
 Plexiglas makes flat surface
for switch actuation
 Higher accuracy
 More information from Sujan
New Microcontroller
 MicroChip’s PIC
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18F4550
Cheaper
More widely known
Allows the use of the
B.A.S.I.C. programming
language
Easier to interface with:
 Clock
 USB
Electronic Components
DLP-USB232M
 USB to Serial (TTL)
converter
 Allows communication
between microcontroller and
almost any computer
 Watch chip
 Allows the microcontroller to
keep accurate time
 Gives non-volatile storage
memory
DS1307
Alarm
 Auditory, visual, and vibratory
alarm possible
 Further investigation required to
determine which alarm
techniques will be used.
 Alarm times are variable
Computer Interface
 Allows the setting
alarm schedule
 Allows download
of patient data
 Easy to use and
navigate
Present Accomplishments
 Established
communication
between
microcontroller and
PC
 Installed Plexiglas to
increase stable
contact area between
the compartment lid
and switch
 Began writing code in
B.A.S.I.C.
Future Work
 Convert code from C programming language to
B.A.S.I.C.
 Implementing time functionality
 Integrate alarm clock
 Test entire prototype
 Have final circuit printed
References
 VIASYS Healthcare, Inc.
 University of Wisconsin – Madison Medical Electronics
Lab
 http://www.dipdesign.com/usb/usb232.html
 http://www.sparkfun.com
 http://www.microchip.com