I am currently exploring the deployment of a Left Atrial Appendage Occluder through a cardiac catheter. Unlike traditional techniques, the project ARTERY aims to sensorize the catheter using Fiber Bragg Grating (FBG). The motive is for shape reconstruction and force sensing. This innovative proposal puts forth fascinating design challenges. On the one hand we have a system that is attached by nut and bolt (occluder to catheter) and on the other hand we must avoid torsional strain to FBG core. As the fiber fails to distinguish between torsional and bending strain and this poses shape reconstruction error. However there have been some efforts to tackle this problem by modeling [1], sensor fusion and deep-learning but these can be computationally demanding instead using a smart design or using the principals of embodied intelligence we can try to eliminate the twist in the fiber.

The design problem becomes intriguing—having a system fixated by threads, yet unable to rely on torques. This poses a critical question: How can we overcome this challenge?

My ongoing thesis delves into addressing this question. We have developed few potential solutions and are in the process of testing their feasibility.

Some updates as we navigate this fascinating design problem in cardiac catheter technology.

FAQs

Q. Why shape sensing in the first place?

A. Well FBG shape reconstruction has a potential to eliminate the harmful exposure to X-Rays used for imaging during these type of interventions.

For thesis click here.

References:

[1] Al-Ahmad, O., Ourak, M., Van Roosbroeck, J., Vlekken, J. and Vander Poorten, E., 2020. Improved FBG-based shape sensing methods for vascular catheterization treatment. IEEE Robotics and Automation Letters, 5(3), pp.4687-4694.