Transcript Daniel Wisniewski (EE)

Hemodynamic Flow Simulator
P08026
Introduction
The hemodynamic flow simulator is used to demonstrate what occurs in the human circulatory
system during normal activity. This device also has the capacity to demonstrate certain heart
conditions such as a heart murmur or high blood pressure. This allows for bioengineering students
to better understand the complex flow conditions experienced in the heart. By measuring dynamic
flow rates and pressures, students are able to observe the effect of variations in vessel size, arterial
compliance, fluid constitution and topology in a hands on environment.
Objective
The main goal of this project is to design and construct a modular system that is run and operated
from a user interface on LabView and simulates as closely as possible the operations of the human
circulatory system.
Drive System
Vascular Resistance
Compliance Chamber
The drive system is capable of
adequately
simulating
a
pressure waveform similar to
that of the human heart. A
linear actuator controlled by
LabView pushes on a rubber
membrane on the drive
cylinder. Liquid flows into the
heart chamber, compressing
the actual heart membrane
and forcing liquid into the
system.
The system is capable of
simulating
the
vascular
resistance seen in the human
body. Vascular resistance is
the resistance to flow that
must be overcome to push
blood through the circulatory
system. This is simulated with
a system of parallel tubes that
each has a globe valve. By
allowing liquid to pass through
different
combinations
of
tubing and valves, the system
can accurately portray a wide
range of resistivity.
The compliance chamber is
used to simulate the tendency
of the blood vessels to stretch
in response to pressure. In
terms of data collection, the
compliance chamber helps to
steady out the waveforms
seen from flow rate and
pressure measurements. By
varying the pressure and
volume of air in each of the
two sides of the chamber, the
user is able to adjust the
compliance in the system.
Chuck Marion (ISE)
Jonathon Kelso (EE)
Daniel Wisniewski (EE)
Matthew Hicks (EE)
Jason Brown (ME)
Amanda Clark (ME)
Sponsor: Dr. Daniel Phillips (EE)
Faculty: Dr. Day (ME), Dr. Kempski (ME)
Special Thanks to Dr. Karl Schwarz M.D.
and Richard Wisniewski