P14026_Subsystem Review 10/29/13
TEAM 14026:
SUBSYSTEM DESIGN
REVIEW
M i ke A l lo cc o,
So h a m
C h a k rabo r t y,
Le s lie H ave ns,
D a n i elle Ko c h ,
A n drew M i lle r,
K ri s te en Ye e ,
Ste ph a n ie
Z a m bito
P14026_Subsystem Review 10/29/13
AGENDA
We e k 6 M a t r i x
We e k 6 Fu n c t i o n a l D e c o mp o s i t io n
N ew Fu n c t i o n a l D e c o m p o s i t i o n
We e k 6 P r o p o s a l
We e k 6 S y s tem D e s i g n s
P u g h C h a r t f o r S y s te m s
M o d e l in g Lu n g D e c o m p o s i t io n
M o d e l in g Lu n g P u g h C h a r t
Proposal Number 1
 Bill of Materials-High Level
 Simulations of Breaths and Compressions
 Measurements – Pressure, Airflow, Oxygen Concentration
 Computer Interface and Power
 Programming Flow Charts
 Overall BOM
 Proposal Number 2
 Te a m A c t i o n I te m s
 Week 6 Test Plan
 New Test Plan
 New Risks
 Schedule
 Next Steps
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P14026_Subsystem Review 10/29/13
WEEK 6 MATRIX
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WEEK 6 FUNCTIONAL DECOMPOSITION
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NEW FUNCTIONAL DECOMPOSITION
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WEEK 6 PROCESS PROPOSAL
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WEEK 6 FUNCTIONAL SYSTEM DESIGNS
Testing
Calibration
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SYSTEM PUGH
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MODEL LUNG DECOMPOSITION
Respond as a real
human lung would
Model human lung
response to inputs
Intake air flow
Receive
air from
PEV
Timing
(clock)
Measure
intake from
sensors
Pressure
Sensor
Volume
sensor
Adjustable
air
resistance
Air flow
sensor
Adjustable
lung
compliance
Expel air
Feedback
to PEV
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SIMULATED LUNG PUGH CHART
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SUBSYSTEM PROPOSAL
1
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HIGH LEVEL BILL OF MATERIALS
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HIGH LEVEL BILL OF MATERIALS
P14026_Subsystem Review 10/29/13
BILL OF MATERIALS
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MODEL LUNG PROPOSAL
 CONTROL VOLUME
Bill of Materials
1 Adult Test Bag
$35.00
1 Neonatal Test Bag
$101.43
But the PEV will not be directly
inflating a lung…
LOWER Bound
(ml/kg)
UPPER Bound
(ml/kg)
4
8
P14026_Subsystem Review 10/29/13
MODEL LUNG PROPOSAL
 AIRWAY RESISTANCE
LOWER Bound
(cmH2O/L*s)
UPPER Bound
(cmH2O/L*s)
6
25
Bill of Materials
1 Adult Test Bag
$35.00
1 Neonatal Test Bag
$101.43
10 ft. Tubing
$19.00
P14026_Subsystem Review 10/29/13
MODEL LUNG PROPOSAL
 PRESSURE APPLICATION
LOWER Bound
(cmH2O)
UPPER Bound
(cmH2O)
1025.07
1034.59
Bill of Materials
1 Adult Test Bag
$35.00
1 Neonatal Test Bag
$101.43
10 ft. Tubing
$19.00
6.6 m^2 Glass
$54.00
1 3L Syringe Pump
$110.00
P14026_Subsystem Review 10/29/13
MODEL LUNG PROPOSAL
 COMPLIANCE CURVE
Bill of Materials
 1. Boyle’s Law:
 2. For most materials:
 3. For the lung:
1
2
1 Adult Test Bag
$35.00
1 Neonatal Test Bag
$101.43
10 ft. Tubing
$19.00
6.6 m^2 Glass
$54.00
1 3L Syringe Pump
$110.00
3
P14026_Subsystem Review 10/29/13
MODEL LUNG PROPOSAL
 NUMERICAL INTEGRATION
 Several possible algorithms
to be selected based on:
-Acceptable Error
-Speed of Sensors
Bill of Materials
1 Adult Test Bag
$35.00
1 Neonatal Test Bag
$101.43
10 ft. Tubing
$19.00
6.6 m^2 Glass
$54.00
1 3L Syringe Pump
$110.00
P14026_Subsystem Review 10/29/13
MODEL LUNG PROPOSAL
 ACTUTATION
 Actuated syringe pump corrects
pressure to fit the calculated
compliance curve
Bill of Materials
1 Adult Test Bag
$35.00
1 Neonatal Test Bag
$101.43
10 ft. Tubing
$19.00
6.6 m^2 Glass
$54.00
1 3L Syringe Pump
$110.00
1 Linear Step-Motor
$50.00
TOTAL (w/o sensors)
$369.43
P14026_Subsystem Review 10/29/13
SIMULATED BREATH DESIGNS
 Need to be able to trigger assist mode on the PEV
 Create Negative Pressure
 Possible designs:
 EMT Hand Pump
 Syringe Pump
 Turkey Baster
P14026_Subsystem Review 10/29/13
SIMULATED BREATH PROPOSAL
 Syringe Pump
 Proof of Concept
 Creating Negative Pressure
Pull handle out
No to little air
 Creating controlled motion
Wheel
&
Motor
Air is pulled in
P14026_Subsystem Review 10/29/13
SIMULATED COMPRESSIONS DESIGNS
 Need to release air, the PEV is measuring compressions based
on pressure
 Possible designs:
 EMT Hand Pump
 Syringe Pump
 Turkey Baster
P14026_Subsystem Review 10/29/13
SIMULATED COMPRESSIONS DESIGNS
 Syringe Pump
 Proof of Concept
 When doing compressions, air is pushed out of the body
Air is in the syringe
Air is pushed out
P14026_Subsystem Review 10/29/13
MEASURING PRESSURE
 Pressure Transducer
 Sensor Technics
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Operating range: varies from 0-10,25,70,100 mbar (1mbar~1.01cmH2O)
Accuracy: ±.20% Full Scale
17 connection variations and 5 output signal variations
Max Response time:
 ≤25 mbar – 35ms
 ≥25 mbar – 5ms
 Dwyer
 Operating Range: 0-1 psi ±.25% Full Scale
 5ms Response time
 $149.00 each
 Differential Pressure Transducer
 Cole-Parmer
 Operating Range- 0-100” H20
 Accuracy - ±1% Full Scale (1 inH20)
 $172.00
P14026_Subsystem Review 10/29/13
MEASURING PRESSURE SUMMARY
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MEASURING AIR FLOW & VOLUME
Q=A*V
W = *Q
Measuring Air Volume
 Volume = Compliance*[Pressure – Flow*Resistance]
 Boyle’s Law: As volume of gas increases; pressure decreases
P14026_Subsystem Review 10/29/13
MEASURING OXYGEN CONCENTRATION
 Total Atmospheric Air Pressure: 1033.23 cmH20
 21% is oxygen concentration
 Vernier O 2 Gas Sensor
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Cost: $188
Accuracy (at standard pressure 760 mmHg): +/- 1% volume O2
Response time: ~12 seconds to 90% of final value
http://www.vernier.com/files/manuals/o2-bta.pdf
P14026_Subsystem Review 10/29/13
HIGH LEVEL BILL OF MATERIALS
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COMPUTER INTERFACE & POWER
SOURCE SUBASSEMBLIES
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EMANT300 LOW COST USB 24 DAQ
MODULE
 Up to 6 channels of differential
multiplexed ADC
 Single channel 22 bit @ 10
samples/sec
 Single channel 16 bit waveform @
2500 samples/sec
 1 channel of 8-bit D/A conversion
 8 digital IO channels
 One 16-bit general-purpose counter
or 16-bit PWM
 USB connection
 25 pin D-Sub connects to physical
world
 Application adaptors with
instructional guides
 LabView compatible
 Cost = $99.00
http://www.emant.com/251004.page
P14026_Subsystem Review 10/29/13
PROGRAMMING FLOW CHART
Automatic
Mode
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PROGRAMMING FLOW CHART
Assist Mode
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PROGRAMMING FLOW CHART
CPR Mode
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PROGRAMMING FLOW CHART
Manual Mode
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ESTIMATED COSTS WITHOUT SHIPPING
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SUBSYSTEM PROPOSAL
2
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TEST LUNGS
 Siemens Test Lung 190:
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$222.00 – amazon.com
Adult
Volume of 1 Liter
Non-adjustable compliance and resistance
 IMT Easy Lung:
 Non-adjustable compliance and resistance
 $172
 Adult
 Newport Medical
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Neonatal
$101.43
Non adjustable resistance
Non adjustable compliance (0.8 mL/cmH20)
Capacity up to 60 mL
Can simulate breathing effort.
P14026_Subsystem Review 10/29/13
TEST LUNGS CONTINUED
 IMT Smart Lung
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Widely adjustable compliance, resistance, and leakage.
Adult and Infant models (sold separately).
$654.88 (each)
Price to Performance ratio is best on the market.
P14026_Subsystem Review 10/29/13
TEAM ACTION ITEMS
P14026_Subsystem Review 10/29/13
WEEK 6 TEST PLAN
 Test Mass Flow Sensor
 Verify accuracy of the data
 Test Pressure Sensor
 Verify accuracy of the data
 Test Lung Simulation
 Verify lung operations
 Test Calibration
 Verify accuracy of testing system
P14026_Subsystem Review 10/29/13
NEW TEST PLAN
 LT V Series 900
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A PEV that tests itself
Can be calibrated
Measures air flow
Measures PEEP
Measures pressure
Measures breaths per minute
Has an assist mode
Has a low battery alarm
Can set the level in which alarms are set off
Tubes need to be replaced – currently a number of holes
http://www.cookchildrens.org/SiteCollectionDocuments/HomeHealth/Education/RespiratoryTherapy/Ventilator/
CCHH_Ventilator_LTV950SeriesOperatorsManual.pdf
P14026_Subsystem Review 10/29/13
LTV 900
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NEW RISKS IDENTIFIED
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SCHEDULE
P14026_Subsystem Review 10/29/13
NEXT STEPS
 Meeting with Professors
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Dr. Wellin
Dr. Kempski
Mr. Hanzlik
Dr. Robinson
Dr. Slack
Dr. Lamkin-Kennard
 Contact customer support for LT V about data acquisition
 Detailed Engineering Analysis of subsystem proposal chosen
by our customers.
P14026_Subsystem Review 10/29/13
QUESTIONS?
P14026_Subsystem Review 10/29/13
BACKUP SLIDES
P14026_Subsystem Review 10/29/13
ASSIGNED RESPONSIBILITIES
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Andrew – Choosing sensors, flow analysis, sensor integration
Danielle – Flow analysis, methods of fabrication
Kris – Project planning, calibrate LT V, CAD
Leslie – Choosing sensors, sensor integration
Mike – Start coding, Flow analysis, CAD
Soham – Choosing DAQ board, sensor integration
Stephanie – Choosing DAQ board, coding