Multi-Selective Catheter with Two Deflectable Segments

Multi-Selective Catheter with Two Deflectable Segments

Van Lith, J.Y.

Dankelman, J. (mentor)
Dobbelsteen, J.J. (mentor)
Clogenson, H.C.M. (mentor)

Mechanical, Maritime and Materials Engineering

BioMechanical Engineering

BMD

2012-12-19

Endovascular interventions are a type of minimally invasive surgery used to diagnose and treat vascular conditions. Long, thin and flexible medical devices like catheters are percutaneously inserted into the blood vessels. Time-action analysis has shown that the navigation of the medical devices from the access to the destination site is inefficient, thereby increasing the inherent risks and costs of endovascular interventions. A new steerable catheter with two deflectable segments may benefit the procedure by reducing the number of device exchanges while speeding up the process. The new catheter is designed for navigation to the arteries in the legs. Currently, multiple selective catheters are used consuctively to first cross the aortic bifurcation and then navigate down the leg. The new steerable catheter is designed to three commonly used selective catheters. A handle is also designed to actuate the two deflectable segments. A prototype is built and experimentally evaluated. The catheter has the required axial and rotational stiffness, but lacks the required bending elasticity. The deflectable segments can successfully be actuated into the desired geometries. However, the bending elasticity must be improved before conclusive evidence can be found that the catheter can replace the selected conventional catheters. Experiments within a vascular model show promising initial results.

steerable catheter

http://resolver.tudelft.nl/uuid:ded39193-9ae4-42c3-99ec-41509865398f

2015-12-19

Student theses

master thesis

(c) 2012 Van Lith, J.Y.