Abstract
Avoiding the electromagnetic interference is one of the most difficult technical challenge during catheterization. The use of an optical fiber force sensor in the catheter can be an alternative. Herein, two flexure structures were designed for catheter tip and simulated using ANSYS to verify their sensitivity and durability. Fiber Bragg Grating sensors were configured to measure the tri-axial force exerted on the catheter tip. Calibrated result shows that an optical fiber force sensor can measure an axial force of up to 50 gF with an accuracy of 1 gF. Our calibration results demonstrate reliable measurement with high accuracy with repeatability.
Highlights
Percutaneous coronary intervention (PCI) is a minimally invasiveprocedure of the heart that is performed along theblood vessels inside the human body
Fiber Bragg Grating (FBG), which is based on a fiber optic sensor, is very attractive owing to its inherent wavelength response and suitability for a multiplexed operation
FBG sensors can be developed for multi-array sensing in terms of strain and temperature; the temperature needs to be excluded for a contact force measurement of the heart
Summary
Percutaneous coronary intervention (PCI) is a minimally invasiveprocedure of the heart that is performed along theblood vessels inside the human body. Solid state or electrical sensorsare used as a force sensor in a catheter to monitor the applied force [2]. Such sensors cause electromagnetic interference (EMI) and problems may occur during an operation. Fiber optic sensors have been used as an alternative device to prevent this problem Such sensors have many advantages over conventional sensors, such as their insensitivity to electromagnetic fields, small weight, minimal intrusiveness, easy termination, and flexibility. FBG sensors can be developed for multi-array sensing in terms of strain and temperature; the temperature needs to be excluded for a contact force measurement of the heart. Studying the contact force measurement of a steerable catheter is important because the steering of the catheter will create a change in the FBG reflection
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