Transcript Programmable Chest Exerciser

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.
John Newman, M.D.
Heart Failure and Its Treatment
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Statistics
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Affects 5 million Americans
50% mortality rate within 4
years of diagnosis
•Benefits of exercise as treatment
•Improves vascular function
•Improves muscle function
•Reduces arrythmia risk
•Benefits of deep breathing as
exercise
•Targets muscles of chest wall
•Not as difficult for patients
Pathology
Heart doesn’t pump nutrients to
tissues efficiently
Heart can’t develop pressure to
eject needed stroke volume
Current Devices
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Incentive Spirometer
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Problems:
Must be stationary
during use
 Large, awkward shape
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Pneumotrace
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Problems:
Must be lying down for use
 Very complex device
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Current Devices
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RESPeRATE
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Problems:
Must wear headphones
 Must carry additional device
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VivoMetrics LifeShirt
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Problems:
Large Device
 Uncomfortable to wear
 Very conspicuous
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Our Solutions
Will be small
 Can be worn inconspicuously under
clothing
 Can be worn during daily
activities
 Will be incorporated into
a PDA
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Applications
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Daily Wear
Measure breathing rate
 Measure patient’s compliance
with pre-programmed breathing
exercises
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Exercise Wear
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Measure breathing rate
Indicate when the user reaches a proper
range for beneficial aerobic activity
Approach
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Bridge
Differential amplifier
Bend Sensor
Voltage threshold
detector
Rs/R2=R3/R1
Design
Acquired components:
 Voltage source
 Low power
Operational Amplifier
Needed components:
 Adjustable inelastic
band
 Elastic section
 Strain gauge/bend
sensor
 PDA for digital output
 DAQ system
 Motor for vibration
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
Tidal Volume Experiments
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Determine
relationship between
chest circumference
and lung volume
Determine the output
voltage of the device
during a normal and a
deep breath
Measurements used
to adjust resistor
ratings and gain
Expected Results
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Output voltage correlates to lung volume
Deep breath threshold will correspond to a
given output voltage
If threshold not reach in a predetermined
time period, alarm will sound
Expect that the use of this device will
increase lung capacity and force of
expiration from lungs
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>.
http://www.answers.com/topic/lung