Transcript Pump that blood!

Charlotte Godfrey-Romo
Kalanianaole
Pump that Blood!
• A biomedical
engineering STEM
lesson (original –
Clearing a Path to
the Heart)
• www.teachengineering.org
Start with Desired Outcome
• NGSS MS-ETS1-4 Develop a model to generate data for
iterative testing and modification of a proposed object, tool ,
or process such that an optimal design can be achieved.
• HCPS III- Standard 4: Life and Environmental Sciences:
STRUCTURE AND FUNCTION IN ORGANISMS: Understand the
structures and functions of living organisms and how
organisms can be compared scientifically
Learning Objectives
After this activity, students should be able to:
• Describe what happens when a blood vessel is
blocked.
• Describe how bioengineering techniques can
be used to "open up" a blocked blood vessel.
• Apply the engineering design process to
create solutions to a problem.
Pre-req
• Some knowledge of circulatory system
Relevancy
• Do you know anyone
who has had a heart
attack? (Ask students to
raise their hands.) Do
you think that heart
attacks are common?
Why or why not? What
causes them?
Which heart looks healthy?
Heart 1
Heart 2
Observe Phenomena
• What do you observe about the rates of flow
in the two models?
• Write down 3 observations.
• How can we compare the models?
Teacher pre-made questions?
• Which model represents heart 1? Heart 2?
• Why do you think that?
• What happened to heart # to make it flow
more quickly/slowly?
• Do you think it is possible for the flow to get
completely clogged?
• What do you think would happen to heart?
Biomedical Engineer
In teams of 3 you will design a device to unblock
a clogged heart artery.
Review
Brainstorm
Design
Discussion & Brainstorming
• Discuss with your team how the supplies can
be used to create a device that can unclog the
arteries. Draw diagrams to help explain.
2-balloons
2-Straws
1- Pipecleaner
Balloon pump
2-Paperclips Wire
4-Rubber bands
Tape
Foil
(You do not have to use all the materials)
Design & Build
• Go ahead and build your device and test it!
Teacher ?’s:
Visit each group and ask the following questions:
• Why did your group decide on this design?
• How does this device work?
• What happens to the plaque after you use the
device?
• Which specific blood vessel in the body might this
represent?
• What would happen if you were able to unblock
part, but not all, of the artery?
• How would having partially blocked blood vessels
affect a person's body?
Review & Revise
• Keep track of changes you make in the design
along the way.
Group Discussion
• Share out with all the other groups and
analyze other groups designs. What worked?
What didn’t work?
Do More Research…..
Final Write Up
• What is a heart attack?
• What are some solutions to heart problems?
• How do biomedical engineers unblock clogged
arteries?
• Which design was best for clearing “arteries”?
Use evidence gathered in the activity to
support your argument.
Keywords
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Artery
Biomedical engineering
Blood vessel
Body circulation
Circulatory system
Engineering design process
Health
Heart attack
Human body
Medical device
Model
Medical
Plaque
Prototype
Stroke
Resources
• www.teachengineering.org