Transcript document

Programmable Biofeedback
Chest Exerciser
Group 23:
Eileen Bock, Lauren Cassell,
Margaret Gipson, Laurie McAlexander
Advisors:
Douglas Sawyer, M.D., Ph.D.
Paul King, Ph.D.
What is Heart Failure?

Statistics
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Affects 5 million Americans
550,000 new cases/year
50% mortality rate within 4
years of diagnosis
Pathology
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Heart doesn’t pump nutrients
to tissues efficiently
Heart can’t develop pressure
to eject needed stroke
volume
Symptoms
Shortness
of breath
Fatigue
Chest
pain
Irregular heartbeat
Treatments for Heart Failure
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Medications
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Surgery
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Diuretics: decrease blood volume
Vasodilators: dilate blood vessels
Nitrates: dilate blood vessels
LVAD: acts as a pump
Heart transplant
Pacemaker: restores regular heartbeat
Exercise
Using Exercise to Improve
Symptoms
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Benefits of exercise
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Improves vascular function
Improves heart’s ability to contract
Reduces adrenaline levels
Improves muscle function
Reduces arrythmia risk
Benefits of deep breathing
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Targets muscles of chest wall
As effective as other forms of exercise
Not as difficult
Current Devices
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Incentive Spirometer
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Patient breathes in through
mouthpiece to move piston.
Inconveniences:
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Must be stationary during use
Large, awkward shape
Regimen: 10 times every
hour while awake
Current Devices
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Pneumotrace
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Measures respiration changes
Strain gauge transducer attached to belts
Inconveniences:
Must be lying down to use
 Multiple belts and large
measurement device
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Current Devices
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RESPeRATE
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Main purpose is to lower blood pressure
Inconveniences:
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Must wear headphones
Must carry additional device
Regimen: No more than 15 minutes, 3 to 4 times a
week
Current Devices
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VivoMetrics LifeShirt
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Garment worn continuously
Constantly records respiration data
Inconveniences:
Large device
 Uncomfortable to wear
 Conspicuous
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Approach
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Bridge
Differential amplifier
Strain gage
Voltage threshold
detector
Innovative Features
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Portable – PDA
Discrete
Biofeedback system
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Alerts patient when
regimen is not being
followed
Can be turned off for
privacy
Allows physician to
monitor progress
Design
January 15, 2007
 Adjustable inelastic
band
 Elastic section
 Strain gauge
 Voltage source
 DAQ system
 Motor for vibration
January 29, 2007
 Portable power source
 PDA for digital output
Testing
Part 1
 10 subjects wear the
device for 1 hour
each
 Subject will perform
breathing exercises
and various common
activities
 Subject survey
Part 2
 Previous 10 subjects
will return and wear
device for 3 hours
 Subject survey
Testing
Part 3
 Clinical testing: requires another IRB
protocol submission
 2 control groups, 1 experimental group
 Measure improvement of negative
inspiratory force with incentive
spirometer
Resources
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REST1 Impedance Pmeumograph by UFI.
http://www.ufiservingscience.com/ DSRsp11.html
"How to Use an Incentive Spirometer". The Cleveland Clinic Foundation.
<http://www.clevelandclinic.org/health/healthinfo/docs/0200/0239.asp?index= 4302& src=news>.
"Anaesthesia Products," Lifeline Systems Pvt. Ltd.
<http://www.lifelinedelhi.com/ catheter-mount.html>
"RESPeRATE High Blood Pressure and Hypertension." Buyamag.
<http://www.buyamag.com/high_blood_pressure_hypertension.php>.
"Smart textiles at Hightex 2005". Hightex 2005.
<http://www.hightex2005.com/smart_textiles.htm>.
“Learning to Whistle”. November 2005.
<http://learningtowhistle.blogspot.com/2005_11_01_learningtowhistle_arch
ive.html>.