team 14026: subsystem design review

Mike Al locco, Soham Chakraborty, Lesl ie Havens, Daniel le Koch, Andrew Mi l ler , Kr isteen Yee, Stephanie Zambito

TEAM 14026: SUBSYSTEM DESIGN

REVIEW

P14026_Subsystem Review 10/29/13

Week 6 Matr ix Week 6 Funct ional Decomposit ion New Funct ional Decomposi t ion Week 6 Proposal Week 6 System Designs Pugh Chart for Systems Model ing Lung Decomposi t ion Model ing Lung Pugh Chart 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 Team Act ion Items

Week 6 Test Plan New Test Plan New Risks Schedule Next Steps

AGENDAP14026_Subsystem Review 10/29/13

WEEK 6 MATRIXP14026_Subsystem Review 10/29/13

WEEK 6 FUNCTIONAL DECOMPOSITION

P14026_Subsystem Review 10/29/13

NEW FUNCTIONAL DECOMPOSITIONP14026_Subsystem Review 10/29/13

WEEK 6 PROCESS PROPOSALP14026_Subsystem Review 10/29/13

WEEK 6 FUNCTIONAL SYSTEM DESIGNSTesting

Calibration

P14026_Subsystem Review 10/29/13

SYSTEM PUGHP14026_Subsystem Review 10/29/13

MODEL LUNG DECOMPOSITION

Respond as a real human lung would

Intake air flow Model human lung response to inputs Expel air

Receive air from PEV

Measure intake from

sensors

Timing (clock)

Pressure

SensorVolume sensor

Air flow sensor

Adjustable air

resistance

Adjustable lung

compliance

Feedback to PEV

P14026_Subsystem Review 10/29/13

SIMULATED LUNG PUGH CHARTP14026_Subsystem Review 10/29/13

SUBSYSTEM PROPOSAL 1

P14026_Subsystem Review 10/29/13

HIGH LEVEL BILL OF MATERIALSP14026_Subsystem Review 10/29/13

HIGH LEVEL BILL OF MATERIALSP14026_Subsystem Review 10/29/13

BILL OF MATERIALSP14026_Subsystem Review 10/29/13

CONTROL VOLUME

MODEL LUNG PROPOSAL

LOWER Bound (ml/kg)

UPPER Bound(ml/kg)

4 8

Bill of Materials1 Adult Test Bag $35.001 Neonatal Test Bag $101.43

But the PEV will not be directly inflating a lung…

P14026_Subsystem Review 10/29/13

AIRWAY RESISTANCE

MODEL LUNG PROPOSAL

LOWER Bound

(cmH2O/L*s)

UPPER Bound

(cmH2O/L*s)

6 25

Bill of Materials1 Adult Test Bag $35.001 Neonatal Test Bag $101.4310 ft. Tubing $19.00

P14026_Subsystem Review 10/29/13

PRESSURE APPLICATION

MODEL LUNG PROPOSAL

LOWER Bound

(cmH2O)

UPPER Bound

(cmH2O)1025.07 1034.59

Bill of Materials1 Adult Test Bag $35.001 Neonatal Test Bag $101.4310 ft. Tubing $19.006.6 m^2 Glass $54.001 3L Syringe Pump $110.00

P14026_Subsystem Review 10/29/13

COMPLIANCE CURVE 1. Boyle’s Law: 2. For most materials: 3. For the lung:

MODEL LUNG PROPOSAL

Bill of Materials1 Adult Test Bag $35.001 Neonatal Test Bag $101.4310 ft. Tubing $19.006.6 m^2 Glass $54.001 3L Syringe Pump $110.00

1 2 3

P14026_Subsystem Review 10/29/13

NUMERICAL INTEGRATION Several possible algorithmsto be selected based on:

-Acceptable Error-Speed of Sensors

MODEL LUNG PROPOSAL

Bill of Materials1 Adult Test Bag $35.001 Neonatal Test Bag $101.4310 ft. Tubing $19.006.6 m^2 Glass $54.001 3L Syringe Pump $110.00

P14026_Subsystem Review 10/29/13

ACTUTATION Actuated syringe pump correctspressure to fit the calculatedcompliance curve

MODEL LUNG PROPOSAL

Bill of Materials1 Adult Test Bag $35.001 Neonatal Test Bag $101.4310 ft. Tubing $19.006.6 m^2 Glass $54.001 3L Syringe Pump $110.001 Linear Step-Motor $50.00TOTAL (w/o sensors) $369.43

P14026_Subsystem Review 10/29/13

Need to be able to trigger assist mode on the PEV Create Negative Pressure

Possible designs: EMT Hand Pump Syringe Pump Turkey Baster

SIMULATED BREATH DESIGNS P14026_Subsystem Review 10/29/13

Syringe PumpProof of Concept

Creating Negative Pressure

Creating controlled motion

SIMULATED BREATH PROPOSAL

No to little air

Pull handle out

Air is pulled in

Wheel & Motor Arm

P14026_Subsystem Review 10/29/13

Need to release air, the PEV is measuring compressions based on pressure

Possible designs: EMT Hand Pump Syringe Pump Turkey Baster

SIMULATED COMPRESSIONS DESIGNS

P14026_Subsystem Review 10/29/13

Syringe PumpProof of Concept

When doing compressions, air is pushed out of the body

SIMULATED COMPRESSIONS DESIGNS

Air is in the syringe

Air is pushed out

P14026_Subsystem Review 10/29/13

Pressure Transducer Sensor Technics

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

MEASURING PRESSUREP14026_Subsystem Review 10/29/13

MEASURING PRESSURE SUMMARYP14026_Subsystem Review 10/29/13

MEASURING AIR FLOW & VOLUME

Q = A * VW = *Q

Measuring Air VolumeVolume = Compliance*[Pressure – Flow*Resistance]Boyle’s Law: As volume of gas increases; pressure

decreases

P14026_Subsystem Review 10/29/13

Total Atmospheric Air Pressure: 1033.23 cmH20 21% is oxygen concentration

Vernier O2 Gas Sensor 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

MEASURING OXYGEN CONCENTRATION

P14026_Subsystem Review 10/29/13

HIGH LEVEL BILL OF MATERIALSP14026_Subsystem Review 10/29/13

COMPUTER INTERFACE & POWER SOURCE SUBASSEMBLIES

P14026_Subsystem Review 10/29/13

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

P14026_Subsystem Review 10/29/13

PROGRAMMING FLOW CHART

Assist Mode

P14026_Subsystem Review 10/29/13

PROGRAMMING FLOW CHART

CPR Mode

P14026_Subsystem Review 10/29/13

PROGRAMMING FLOW CHART

Manual Mode

P14026_Subsystem Review 10/29/13

ESTIMATED COSTS WITHOUT SHIPPING

P14026_Subsystem Review 10/29/13

SUBSYSTEM PROPOSAL 2

P14026_Subsystem Review 10/29/13

Siemens Test Lung 190: $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 Neonatal $101.43 Non adjustable resistance Non adjustable compliance (0.8 mL/cmH20) Capacity up to 60 mL Can simulate breathing effort.

TEST LUNGSP14026_Subsystem Review 10/29/13

IMT Smart Lung Widely adjustable compliance, resistance, and leakage. Adult and Infant models (sold separately). $654.88 (each) Price to Performance ratio is best on the market.

TEST LUNGS CONTINUEDP14026_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

LTV Series 900 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

NEW TEST PLANP14026_Subsystem Review 10/29/13

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LTV 900P14026_Subsystem Review 10/29/13

NEW RISKS IDENTIFIEDP14026_Subsystem Review 10/29/13

SCHEDULEP14026_Subsystem Review 10/29/13

Meeting with Professors Dr. Wellin Dr. Kempski Mr. Hanzlik Dr. Robinson Dr. Slack Dr. Lamkin-Kennard

Contact customer support for LTV about data acquisition

Detailed Engineering Analysis of subsystem proposal chosen by our customers.

NEXT STEPSP14026_Subsystem Review 10/29/13

QUESTIONS?

P14026_Subsystem Review 10/29/13

BACKUP SLIDES

P14026_Subsystem Review 10/29/13

Andrew – Choosing sensors, flow analysis, sensor integration

Danielle – Flow analysis, methods of fabricationKris – Project planning, calibrate LTV, CADLeslie – Choosing sensors, sensor integrationMike – Start coding, Flow analysis, CADSoham – Choosing DAQ board, sensor integrationStephanie – Choosing DAQ board, coding

ASSIGNED RESPONSIBILITIESP14026_Subsystem Review 10/29/13