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
Affects 5 million Americans
550,000 new cases/year
50% mortality rate within 4
years of diagnosis
Pathology
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
Medications
Surgery
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
Benefits of exercise
Improves vascular function
Improves heart’s ability to contract
Reduces adrenaline levels
Improves muscle function
Reduces arrythmia risk
Benefits of deep breathing
Targets muscles of chest wall
As effective as other forms of exercise
Not as difficult
Current Devices
Incentive Spirometer
Patient breathes in through
mouthpiece to move piston.
Inconveniences:
Must be stationary during use
Large, awkward shape
Regimen: 10 times every
hour while awake
Current Devices
Pneumotrace
Measures respiration changes
Strain gauge transducer attached to belts
Inconveniences:
Must be lying down to use
Multiple belts and large
measurement device
Current Devices
RESPeRATE
Main purpose is to lower blood pressure
Inconveniences:
Must wear headphones
Must carry additional device
Regimen: No more than 15 minutes, 3 to 4 times a
week
Current Devices
VivoMetrics LifeShirt
Garment worn continuously
Constantly records respiration data
Inconveniences:
Large device
Uncomfortable to wear
Conspicuous
Approach
Bridge
Differential amplifier
Strain gage
Voltage threshold
detector
Innovative Features
Portable – PDA
Discrete
Biofeedback system
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
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>.