1. Catheter Design Advisor: Dr.. Ted Larson Cynthia Harmon Jarntip Pitayagulsarn March 20, 2002

2. Project Definition Objectives: Determine a new design of a catheter that will increase control and maneuvering Solution: Implement stitching along tubing of catheter

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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”

9. 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. Wuinn- Woodbine, Inc: Phoenix, Az. 1998. www.breg.com/.../ painmanagement_accessories.html www.vesalius.com/.../caro_anat/ cfsb_caro_anat1.asp www.russellchun.com/ brain.html www.kenkifer.com/bikepages/ touring/bags.htm