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Three-Dimensional Force System

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Related Experiment Video

Updated: Aug 5, 2025

Writing Bragg Gratings in Multicore Fibers

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

Three-dimensional catheter tip force sensing using multi-core fiber Bragg gratings.

Omar Al-Ahmad^1,2, Mouloud Ourak¹, Johan Vlekken²

¹Robot-Assisted Surgery (RAS) group, Department of Mechanical Engineering, KU Leuven University, Leuven, Belgium.

Frontiers in Robotics and AI

|March 27, 2023

Summary

This summary is machine-generated.

This study introduces a novel catheter tip force sensor using multi-core fiber and fiber Bragg gratings. It achieves high-resolution, repeatable measurements for cardiac ablation, improving patient safety.

Keywords:

catheter ablation fiber Bragg gratings force sensor miniaturized sensor multi-core fiber

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Last Updated: Aug 5, 2025

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Published on: April 20, 2016

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Area of Science:

Biomedical Engineering
Medical Devices
Sensing Technology

Background:

Accurate measurement of catheter tip forces is critical for effective and safe cardiac ablation.
Current methods face challenges in providing high-resolution, reliable force feedback during procedures.
Optimal contact forces for effective ablation are near 0.2 N, with deviations risking complications.

Purpose of the Study:

To develop a novel, compact, and clinically translatable catheter tip force sensor.
To achieve high-resolution measurement of both longitudinal and lateral forces.
To enable decoupling of force measurements for improved procedural control.

Main Methods:

Development of a unique force sensor utilizing a multi-core fiber with inscribed fiber Bragg gratings.
Integration of a customizable helical compression spring as the flexural component.
Design and validation of a method to decouple longitudinal and lateral force measurements.

Main Results:

The developed sensor prototype demonstrates high resolution: 7.4 mN (longitudinal) and 0.8 mN (lateral).
Low mean errors were observed: 0.72 mN (longitudinal) and 0.96 mN (lateral).
Excellent repeatability and decoupling between longitudinal and lateral forces were experimentally validated.

Conclusions:

The novel multi-core fiber Bragg grating sensor offers a promising solution for precise catheter tip force sensing.
Its compact design, simple construction, and high performance support clinical translation for cardiac ablation.
Accurate force feedback can enhance ablation efficacy and minimize risks of complications like cardiac perforation.