Transcript Cardiopulmonary Bypass Machine

Cardiopulmonary Bypass
Machine
BY: KIM STEPHENS
What is a cardiopulmonary bypass machine?
 Also called a heart-lung machine or a pump
 Does the work of the heart and lungs when the heart
is stopped
 pumps blood through the body
 oxygenates the blood while pumping, replacing the
function of the lungs
Why is it used?
2 Main Reasons:
1. Most commonly used to stop the heart during
surgery
2. A heart failure patient can sometimes be placed on
the pump while waiting for a heart transplant
How does the CBM work?
 Insert tubes into the vena cava of the heart
 Blood then travels to a chamber in the CBM that
collects and stores
blood from the body
 Blood travels into
the CBM’s pump
which pushed blood
through the machine
How it works cont.
 Blood flows from the pump to the heat exchanger
 Blood then enters the oxygenator
 The cooled, oxygenated blood then goes through a
filter
 Once the blood is filtered it goes through a second
set of plastic tubes which is attached to a large artery,
like the aorta or femoral artery back to the body
Advantages/Disadvantages
Advantages
Disadvantages
More time to perform surgery
“Pumphead”
Provides a motionless heart in an
almost bloodless surgical area
Can sometimes create a blockage in
a blood vessel
Can benefit patients waiting on the
heart transplant list
Heat exchanger in the CBM can
regulate body temperatures in
severe cases of hypothermia
Future
 Portable machines
 Miniature Heart-Lung Machine
 Only testing at this point on small animals
 Positive results
 Further testing will show the advantages of miniHLM versus
the HLM
Sources
 http://surgery.about.com/od/proceduresaz/a/CardiopulmonaryBy
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pass.ht
http://en.wikipedia.org/wiki/Heart-lung_machine
http://www.scientificamerican.com/article.cfm?id=pumpheadheart-lung-machine&page=3
Schnoering, H., J. Arens, E. Terrada, J. S. Sachweh, M. Runge, T.
Schmitz-Rode, U. Steinseifer, and J. F. Vasquez-Jimenez. "A Newly
Developed Miniaturized Heart-Lung Machine--Expression of
Inflammation in a Small Animal Model." Artificial
Organs (2010). PubMed.gov. US National Library of Medicine
National Institutes of Health, Nov. 2010. Web. 10 Nov. 2011.
<http://www.ncbi.nlm.nih.gov/pubmed/18812743>.
http://illumin.usc.edu/14/engineering-the-heart-lung-machine/
http://www.surgeryencyclopedia.com/Fi-La/Heart-LungMachines.html