MSD Project 13022
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MSD PROJECT 13022 VAD BREAKAWAY POWER Final Project Review Joe Tartakoff Customer/Graduate Consultant [email protected] Nick Dominesey ME Project Leader [email protected] Jason Inman EE Team Member [email protected] Chris Smith ME Team Member [email protected] Ellie Sanford ME Team Member [email protected] Michael Edson EE Team Member [email protected] Matthew Myers ISE Team Member [email protected] 5/10/2013 MSD II P13022 Final Presentation
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VAD BREAKAWAY POWER. Final Project Review. MSD Project 13022. Agenda. Project Overview & Concept Summary System Architecture Prototyping Final Products Test Devices Testing Results Customer Needs and Engineering Specifications Bill of Materials Future Enhancements. Project Background. - PowerPoint PPT Presentation
Transcript of MSD Project 13022
MSD II P13022 Final Presentation
MSD PROJECT 13022VAD BREAKAWAY POWER
Final Project ReviewJoe Tartakoff Customer/Graduate Consultant [email protected]
Nick Dominesey ME Project Leader [email protected]
Jason Inman EE Team Member [email protected]
Chris Smith ME Team Member [email protected]
Ellie Sanford ME Team Member [email protected]
Michael Edson EE Team Member [email protected]
Matthew Myers ISE Team Member [email protected]
5/10/2013
Agenda1. Project Overview & Concept Summary
2. System Architecture
3. Prototyping
4. Final Products
5. Test Devices
6. Testing Results
7. Customer Needs and Engineering Specifications
8. Bill of Materials
9. Future EnhancementsMSD II P13022 Final Presentation5/10/2013
Project Background
6-10% of all people worldwide over the age of 65 will develop heart failure.
There are 287,000 deaths per year due to heart failure in the US.
The Thoratec Heartmate II Left Ventricular Assist Device (LVAD) is a bridge-to-transplant device that assists the heart, pumping blood throughout the body for those who are awaiting a heart transplant.
MSD II P13022 Final Presentation5/10/2013
Present LVAD External Power
http://www.thoratec.com/MSD II P13022 Final Presentation5/10/2013
Project Summary The transcutaneous power cord that
connects the implanted device to the external motor control unit is often a source of infection.
The cord is only about 1 foot long so it doesn’t catch on things.
When the unit is dropped, the skin around the cord tears and becomes infected.
MSD II P13022 Final Presentation5/10/2013
Project Objectives Create a breakaway port for power cable that
will detach with a certain amount of force. Cable port is implanted where the cable leaves the
bodyIncrease flexibility of cable and reduce stress on
surrounding skin Create an internal power supply and motor
control unit for the pump when the cord becomes disconnected. Backup power should last long enough for the
patient to seek assistance if something goes wrong
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MSD II P13022 Final Presentation
System Architecture
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MSD II P13022 Final Presentation
System Architecture
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External Device
Breakaway Port
Internal Device
MSD II P13022 Final Presentation
Electrical Prototype
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MSD II P13022 Final Presentation
Final Internal Product
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MSD II P13022 Final Presentation
Final External Product
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MSD II P13022 Final Presentation
Pump Testing
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MSD II P13022 Final Presentation
Battery Lifetime Test
Battery Lifetime Data
run state time(hr:min) end time(hr:min) time lasted(min)
1 9:58 12:07 129
2 2:32 4:40 128
3 11:26 13:34 128
AVG 128
size mA/(hour*cell) runtime est (min)
18650 1500 128
AA -14500 600 51.33
AAA-10440 200 17.11
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MSD II P13022 Final Presentation
Battery Recharge Test
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Battery Recharge Data
run state time(hr:min) end time(hr:min) time lasted(min)
1 12:08 13:03 55
2 4:41 5:40 59
3 1:36 2:30 54
AVG 56
size mA/(hour*cell)RECHARGE est
(m)
18650 1500 56
AA -14500 600 22.4
AAA-10440 200 7.47
MSD II P13022 Final Presentation
Magnetic Force Testing
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Force Pull Test on SkinAngle of Disconne
ctForce (N)
Displacement of
skin (mm)Feeling Assessment Comments
90 degrees
1 1 light
2 5 medium
2.5 10 med-heavy
3 10 heavy
3.5 12 too heavy
4 15 too heavy
45 degrees
1 - light
2 - light-med. reasonable disconnect
3 - medium upper limit
4 - med-heavy
5 - heavy
0 degrees
1 - very light barely feel it
2 - light reasonable disconnect
3 - medium upper limit
4 - med-heavy
5 - heavy
MSD II P13022 Final Presentation5/10/2013
MSD II P13022 Final Presentation
Magnet Test Data from Magnet Force Testing Rig
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0 2 4 6 8 10 120.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0Magnet Strength vs. Configuration
3 Pairs 2 Lone Flush3 Pairs 2 Lone Raised3 Pairs Flush3 Pairs Raised2 Pairs Flush1 Pairs Flush
Test number
Bre
akaw
ay F
orc
e [N
]
MSD II P13022 Final Presentation
Magnet Test Data from Magnet Force Testing Rig
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0 2 4 6 8 10 120.0
0.5
1.0
1.5
2.0
2.5Magnet Strength vs. Configuration
3 Pairs Flush2 Pairs Flush1 Pairs Flush
Test number
Bre
akaw
ay F
orc
e [N
]
MSD II P13022 Final Presentation
Heat Generation Test Data
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0 10 20 30 40 50 60 70 800
5
10
15
20
25
30
35
40
45
Transient Temp. Data for Internal Device
Ambient
External Surface
Inside Ambient
Time, [s]
Tem
per
atu
re,
[C]
Material k [W/m^2K] L [m]Heat Flux at Final Time [mW/cm^2]
Acryllic 0.2 0.0048 46.19
MSD II P13022 Final Presentation
Specs and Results
Specification (Metric) Unit of Measure
Customer Needs
Results
Force transmitted directly outward N 1 to 3 3
Spring constant of cable N/m < 750 25
Minimum back-up support time min 15-30 51*
Battery recharge time min 8 to 10 23*
Heat flux W/cm2 < 40 46.2
Battery Voltage V 12 or 14 14
Max volume of internal device cm3 400 370
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Budget/Bill of Materials
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https://edge.rit.edu/edge/P13022/public/BOM%20Datasheets
Estimated Expenditures: $943
MSD II P13022 Final Presentation
Future Enhancements - Electrical Internal Microcontroller
Transmit Battery Data to ExternalMonitor Battery VoltageMonitor Temperature
External MicrocontrollerReceive Battery Data from InternalDisplay Actual Lifetime to user
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MSD II P13022 Final Presentation
Future Enhancements - Electrical Batteries
Use smaller batteries○ Reduces recharge time and size of implant
Use TI Motor ControllerReduces size of implantMore power efficientMore programming involved
Computer Engineer would be useful…
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MSD II P13022 Final Presentation
Future Enhancements - Mechanical External Device Design
Place all external electronics directly inside the existing controller unit if possible.
Use CAD models and rapid prototyping to create a sleek design.
Implementation of a smaller switch system would save a lot of space.
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MSD II P13022 Final Presentation
Future Enhancements - Mechanical Internal Device Design
Order custom batteries that are smaller and offer a custom fit
Shrink down the case when electronic upgrades allow for it.
Generate Aluminum smooth “M&M” shaped case through CNC machining.
Use of a gasket to waterproof the design. Interfacing with P13021
Consider using common plugs/ports such as USB. Use epoxy or a strong bonding material to secure the port. If possible, make the port for the outgoing breakaway
cable and the interfacing cable one and the same.
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