Download Circulatory System Model: HEART PUMP

Circulatory System Model: HEART
Faculty Adviser: Gerry Garavuso
Group P16080
Acknowledgements: Dr. Jennifer Bailey, Doran
Mix, Dr. Steven Day, Dr. George Slack,
Dr. John Wellin, Brinkman Lab, Construct
PUMP
Group Members: (left to right) Nicole Rotondo (ME), Abe Rodriguez (ME), Matt Olsen
(BME), James Erb (ME), Dusty Schroeder
(BME)
Objective Statement
Engineering Requirements
To plan, design, and create a mechanical
heart pump that simulates the mathematical models of the circulatory system for study
and use by the students and instructors of BIME 492.
1. Model flowrate, pressure, and frequency
relevant to heart physiology.
2. Utilize the pneumatic and hydraulic capabilities available in the BME labs.
3. Adhere to a budget of $700
This project will work in conjunction with the
physical model of the systemic circulatory
system, P16081.
4. Device use time must fall within the 3 hour
lab period.
Hydraulics and Pneumatics
Theory
Expected Heart Flow Profile
Hydraulic

Design

1.
2.
3.
4.
5.
6.
PVC Tubing
Uni-seal fittings
Hydraulic cap
One-way valves
Stabilizing rods
Acrylic chamber
tubing
7. Piston
8. Membrane
9. Pneumatic cap
10. Pneumatic fitting

Diaphragm
Pneumatic
The pneumatic end cap housed the IR sensor, the pneumatic intake valve fed by
the pressure regulator, 3 way valve, and the emergency pressure relief valve.
The diaphragm assembly consists of a diaphragm, a 3D printed piston plate, and
spring to help linearize the motion of the diaphragm. The piston and spring were
housed in the hydraulic side of the chamber, with the spring sitting in a retainer
cup in the aluminum hydraulic end cap.
One-way valves are located at the output of the system, one which feeds pressurized water to the circulatory system and one which returns working fluid from the
circulatory system.
Controls
1.
2.
3.
4.
5.
6.
7.
8.
Results
Pressure Regulator
3-way Valve
NI-DAQ
Transformer
Voltage Step-down
V to I Converter
High-voltage Relay
Low-voltage Relay
Conclusions
This figure shows the pressure readings generated when systems
P16080 (heart pump) and P16081 (circulatory system) are combined.
The blue wave represents ventricular pressures, while the red wave
represents atrial pressures.

A heart pump was fully assembled and can be controlled electronically via LabVIEW.

Pulsatile pumping action successfully generates hydraulic flow and physiologically
relevant pressures.

Formal testing with P16081’s circulatory system is needed to verify that the fluids
model is accurate and engineering requirements are fully satisfied.