An analytical model based on classical laminate plate theory can effectively guide the design of one-piece braided cardiovascular catheters with mechanical properties comparable to existing two-piece systems.
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May enable simpler one-piece catheter designs; leaves open in vivo validation before clinical consideration.
Cardiovascular catheterization is a common medical procedure. A single braided catheter with different rigidities at the proximal and distal ends can, if properly designed, provide the necessary control and flexibility and thus replace the current two-piece (external catheter/internal guidewire) system. An analytical model based on classical laminate plate theory was developed in order to predict the elastic properties of angle-plied, single-overlap two-dimensional fiber composite tubular braids, which are required for the determination of the axial, flexural, and torsional rigidities. In this work the analytical model has been used to design one-piece cardiovascular catheters with axial, flexural, and torsional rigidities similar to those values for existing two-piece catheters, thus validating the model as a tool for designing braided cardiovascular catheters.
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Carey et al. (2004) studied this question.
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