Catheter Design
Advisor: Dr.. Ted Larson
Cynthia Harmon
Jarntip Pitayagulsarn
March 20, 2002
Project Definition
• Objectives: Determine
a new design of a
catheter that will
increase control and
maneuvering
• Solution: Implement
stitching along tubing
of catheter
Ideas for the Catheter
• Wings on an airplane
• Dimples on the
golfball
• A parachute
• The curve of a frisbee
• And the decision…
stitching on a baseball
Catheters and the Carotid Artery
• High degree of
branches and
extremely tortuous
• Do not necessarily
want catheter to go in
the direction of blood
flow
• Present complications
when maneuvering the
catheter
Arteries to Aneurysms
• Carotid artery helps
lead to brain
aneurysms
• Coil will be inserted
with aid of catheter to
block blood flow into
the aneurysm
• Once complete,
catheter needs to be
removed from body
Current Status
• Fluid mechanics and
finite element
knowledge lacking
• Building a model to
test the effect of
stitches on the
catheter
• Implement different
kinds of stitching on
model to determine
optimal orientation
Key Issues
• May cause blood clotting
• Difficulty in removing catheter from the
body because stitching may get caught
• Stitches may have negative impact on
catheter
Future Directions
• Begin building model by using plastic
tubing, thin wire, and glycerol water
• Test model by placing weight on the end
• Measure flow rate of water coming out of
tubing
• Observe the effects within the tubing, such
as the movement of the “catheter”
References
•
•
Kerber, C. W., Heilman, C.B. “Flow Dynamics in the Human Carotid Artery:
I. Preliminary Observations Using a Transport Elastic Model.” American
Journal of Neuroradiology. Jan/Feb 1992, Vol 13, No 1. 173-180.
Griffing, David, f. The Dynamics of Sports. Dalog Company: Oxford, Ohio,
1987.
Kuethe, A. M., Chuen-Yen, C. Foundations of Aerodynamics. WuinnWoodbine, Inc: Phoenix, Az. 1998.
www.breg.com/.../ painmanagement_accessories.html
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www.vesalius.com/.../caro_anat/ cfsb_caro_anat1.asp
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www.russellchun.com/ brain.html
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www.kenkifer.com/bikepages/ touring/bags.htm
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