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Objective for

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Title: Objective for


1
Objective for
2
System of Quality of
3
Measure Life
4
Team Members
  • Maja Middleton Team Leader
  • Kayla Ericson Communicator
  • Kristin Riching BSAC
  • Katherine Davis - BWIG

5
  • Client
  • Dr. Erwin B. Montgomery M.D.
  • Department of Neurology
  • Advisor
  • Prof. Justin Williams
  • BME Department

6
Problem Statement
  • Design a system or tool to measure the quality of
    life for a patient suffering from movement
    disorders.
  • The system/device must provide evidence that the
    quality of life has improved post surgery so that
    insurance companies will continue to fund
    deep-brain stimulus rehabilitation.

7
Quality of Life
  • Definition Quality of life is a measure of the
    means that people live within their own
    environments in ways that are best for them
  • Applicable Definition The ultimate goal of deep
    brain stimulation surgery is to enable people to
    live quality lives -- lives that are both
    meaningful and enjoyed, but are also functional
    mentally, physically and socially.

8
Three Aspects of Quality of Life
  • Mental Patients feelings and attitudes about
    themselves and their abilities as related to
    their disease and quality of life
  • Cognitive assessment (PADLS or MSQOL54)
  • Physical Patients ability to perform daily
    tasks
  • Bluetooth accelerometer
  • Social Patients daily interactions with
    society and personal relationships
  • GPS
  • All three aspects will be measured pre- and
    post-surgery

9
Product Design Specifications
10
Background Material and Research
  • Movement Disorder Symptoms
  • Rigidity
  • Postural Instability
  • Tremor
  • Bradykinesia / akinesia
  • Slowness
  • Absence of movement
  • Dyskinesia
  • Abnormal, involuntary movement
  • Side effect of drug therapy

11
Previous Methods
  • No previous devices for objective measure of
    movement disorders found besides written
    questionnaires and doctor judgment.
  • Doctor observation is becoming less accepted as
    insurance companies lean toward evidence based
    medicine

12
Background Material and Research
  • Insurance companies only pay for necessary
    rehabilitation treatments that bring the patient
    to a normal functioning level for their
    environment
  • They continue to fund treatments so long as
    progress continues
  • All progress is marked on a scale that relates to
    daily functions of life
  • Reaching, lifting, standing, walking, dressing,
    etc

13
Deep Brain Stimulation
  • For neurologically based movement disorders
  • Two electrodes implanted in the brain are fed to
    a pulse generator implanted in the chest
  • The generator delivers high-frequency
    electrical stimulation that shuts down
    nerve cells to allow cells to regain
    self-control

Figure 1 http//www.clevelandclinic.org/neuroscie
nce/techniques/dbs.htm
14
Physical Design Specifications
  • Accelerometers
  • 5 subunits
  • One for each wrist (2 total)
  • One for each ankle (2 total)
  • One on the trunk as a reference
  • Bluetooth enabled
  • Allows for wireless messaging of data to
  • the central PDA

35 mm
Depth 5mm
35 mm
Figure 2 Top picture - front view bottom
picture back view http//www.gvu.gatech.edu/ccg/
resources/btacc/index.html
15
Physical Technical Aspects
  • All accelerometers need to communicate together
    done via the PDA and Bluetooth technology
  • Each signal must be recognized individually by
    the PDA (X, Y, Z data in ASCII format number
    for a character)
  • Will sample at 20 Hz (Nyquis Theorem)
  • Battery life (Lithium ion) is about 60 hours (840
    mAh 3.7V)
  • Has A-D conversion

16
Central Integration Unit
  • Hewlett Packard - Personal Desktop
    Assistant (PDA)
  • Bluetooth enabled PDA
  • CompactFlash slot
  • Expansion slot in PDA for memory capabilities
  • USB port for easy PC interfacing

HP iPAQ2215
Figure 3 http//www.circuitcity.com/detail.jsp?c
1bgucqp0bookmarkbookmark_0oid74016catoi
d-8028m0
17
Central Unit Technical Aspects
  • PDA
  • 64 MB internal RAM
  • Up to 512 MB of add-on memory
  • 900 mAh lithium rechargeable battery
  • Software must be programmed for PDA to record and
    store GPS data (every half hour)
  • Software must also be programmed to receive,
    store, and manipulate accelerometer data
  • All programming will be done using the software
    development kit (SDK) from Microsoft

18
Social Design Specifications
  • Laipac Global Positioning System (GPS)
  • Tracking GPS compact flash card (to log distance
    and location)
  • Low power consumption
  • Windows compatible

Figure 4 http//www.laipac.com/gps_tf30cf_eng.htm
19
Social Technical Aspects
  • GPS
  • Record readings every half hour
  • Accurate to 25 m
  • 3.3 V
  • .2 W power consumption
  • PDA driver is downloadable from the website

20
Thank you!
  • We just want to extend our thanks to
  • Dr. Montgomery
  • Prof. Justin Williams
  • Dr. Jim Abbs
  • Daryn Belden
  • Gary Diny, PT

21
Future Work
  • The plan for the device is thoroughly mapped out.
    The next steps include
  • Purchasing the PDA and CompactFlash card
  • Writing the software with the SDK for the GPS
  • Purchasing the pieces for the accelerometer
  • Purchasing the circuit board and assembling the
    system
  • Design and build casing for the accelerometers
  • Write software using the SDK for the
    accelerometer
  • Test the integrated system

22
Overall schematic
Reference Accelerometer
Integrated PDA and GPS
Upload data to PC
Accelerometer
Figure 5 www.circuitcity.com
23
References
  • Davis, William R. Personal Interview. 14 Feb.
    2004.
  • Department of Neurology. (2001). What are
    Movement Disorders and How are they Treated?
    Retrieved March 8, 2004, from Baylor College of
    Medicine Web site http//www.bcm.tmc.edu/neurol/s
    truct/park/park6.html
  • Diny, Gary. Personal Interview. 27 Feb. 2004.
  • Hobson, J.P., et al., eds. The Parkinsons
    Disease Activities of Daily Living Scale a new
    simple and brief subjective measure of disability
    in Parkinsons disease. Clinical Rehabilitation
    151 (2001) 241-246.
  • Meyers, Allan R., et al., eds. Health-Related
    Quality of Life in Neurology. Neurology and
    Public Health 571 (2000) 1224-1227.
  • Montgomery, Erwin B. Personal Interview. 27 Jan.
    2004.
  • Deep Brain Stimulation surgery. Retrieved April
    25, 2004. http//www.clevelandclinic.org/neuroscie
    nce/techniques/dbs.htm
  • Deep Brain Stimulation Surgery. Retrieved April
    25, 2004. www.wemove.org
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