GRADUATE DEPARTMENT OF BIOENGINEERINGUniversity of Illinois at Urbana-Champaign

BioInstrumentation Capstone Summer 2016Cadaveric Perfusion Pump for Improving Trauma Team Training

Collaboration SponsorsOSFHealthCare and University of Illinois College of Medicine

Ankush Gakhar B.S. Electrical Engineering

Ryan Migalla B.S. Engineering Physics

William Lupetini Ross B.S. Electrical Engineering

Jessica Su B.S. Material Science and Engineering

Accomplishments Designed logical iteration testing flow Determined optimal pump for system Integrated sensors Created user-friendly display Improved software adaptability and readabilityConsolidated all aspects into one solid designFully documented all hardware and software components

Delivered a functional system that is ready for continuous refinements as the technology evolves.

“The senior author has developed and refined the "Live Cadaver" methodology since 2009 for trauma surgical training. We are recent adopters and have validated this platform. However, we plan to improve

the method with the design of a new pump that will allow for physiologic parameters to be adjusted during the utilization of this training platform.”

Upper extremity simulation

Lower extremity simulation

Improve upon our partner’s artificial perfusion system by making it safer, streamlined and able to accurately

generate and measure rapid modulations in fluid pressure.

Initial MeetingsDetermined focus areas

Defined engineering specifications

Iteration 1Original pump system reproducibility

Research parts

Iteration 2Add sensors, new pump, protoboard shield

Iteration 3Add accumulator and display, soldered shield

Verify Specifications

Iteration 2

Process Iteration 1

Iteration 3

Final DesignFront View Side View

SolutionHoneywell PX3 pressure sensors

Accurate, Durable, Economical

FloJet Diaphragm Pump

Fast modulation, Smooth operation, Safe

SolutionControl & Display Improvements

Easy to adjust and obtain information from

Software Improvements

More robust, easier to understand and modify

The Sensor of ChoiceHoneywell PX3 pressure sensors

Electrical Connector

Pressure Port

Engineering Specification

Response Time < 2ms

Relative Gauge Measures with respect to atmosphere

Efficient 5 Vdc3.5 mA max

Fluid Compatibility

Oils, brake fluids, air, water, etc.

Durable > 10 million pressure cycles

Water-proof IP 67

Using a pressure loss model the sensor is able to determine the output of the system accurately without needing to be near the point of insertion

Pressure drop is modeled using:Bernoulli’s Equation:

The Hagen - Poiseuille Law:

Sudden area change model:This allows for accurate readings and creates a system easy to

use, clean and modify

Calibrating Sensors

The Pump of ChoiceFloJet Diaphragm Pump

Engineering Specification

Max Flow Rate 2.9 gpm, 11.6 lpm

Max Pressure 50 psi

Efficient and Powerful

12 Vdc7.5 A @ 50 psi

Cleanable Run dry with air

Portable 2.6 lbs

Vertical draw Self-prime up to 8 ft.● Reservoir● Accumulator● Sensor● Cadaver

Inlet Outlet

Pump Controller● Microcontroller● Display

Pump VerificationAble to run for long periods of time

Able to create pulsatile flow

Able to replicate three physiological blood pressures

User-Friendly Display

Switch for 4 Pressure Modes ● Healthy● Hypertension● Hypotension● Prime

LEDs represent ON/OFF mode Display reads

● Heart Rate● Sensor Pressure

Main Power ON/OFF Switch Heart Rate Knob

Creating the DisplayUtilized 3-D printer at Carle to create a quick and custom faceplate

Robust SoftwareMaintains 60+ Hz data capture of motor power and sensor pressures

Live LCD user output plus USB data output for historic data

Fast autodetection for sensor type plus transmission line correction

Emergency shutoff due to electrical fault or system blockage

Flexible SoftwareCalibration mode for pipe and motor changes

Code checks for improper changes

Ready to support a dual motor system

Future RecommendationsTest with blood mimicking fluid

Test the effect of flow reduction when attaching system to cadaver

Integration of a PC power supply

In Summary

Accomplishments Designed logical iteration testing flow Determined optimal pump for system Integrated sensors Created user-friendly display Improved software adaptability and readabilityConsolidated all aspects into one solid design

Delivered a functional system that is ready to continue being improved