The finite deformation of the balloon catheter

• We developed an analytical model to determine the shape of inflatable catheter.
• The devices integrated on the catheter can be located by the mechanics model.
• The latitudinal elongation is much larger than the longitudinal elongation of inflated catheter.

The balloon-based catheters are attractive for the minimally invasive procedures because these catheters can be configured to match requirements on size and shape for the interaction with the soft tissue. An analytical mechanic model is developed for the deformed balloon to determine the shape of the inflated catheter. The bridges along latitudinal direction should be high stretchable due to the high elongation along the latitude of the inflatable catheter. These results agree well with the finite element method without any parameter fitting.