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Fiber Optic Sensorized Tools for Cardiology Applications

Fiber Optic Sensorized Tools for Cardiology Applications. July 7 th , 2008 Yong-Lae Park Seok Chang Ryu. Catheter Ablation. Technique used to treat cardiac arrhythmia (an abnormal heart rhythm). Destroys parts of the electrical pathways causing the arrhythmias. Radiofrequency ablation

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Fiber Optic Sensorized Tools for Cardiology Applications

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  1. Fiber Optic Sensorized Tools for Cardiology Applications July 7th, 2008 Yong-Lae Park Seok Chang Ryu

  2. Catheter Ablation • Technique used to treat cardiac arrhythmia (an abnormal heart rhythm). • Destroys parts of the electrical pathways causing the arrhythmias. • Radiofrequency ablation • Cryotherapy ablation

  3. Atrial Fibrillation • Atrial fibrillation is the commonest arrhythmia. • 30,000 to 35,000 catheter ablations for AF performed in the U. S. in 2006

  4. Need for Contact Force/Tactile Sensing • Contact force is one of the crucial factors which determine the lesion size. • A large survey reported (8745 patients) a complication rate of 6%. • 20% of the complications were caused by a perforation of the heart .

  5. Fiber Optic Force Sensing in Ablation Catheter • Multi-axis force sensing using embedded FBG sensors

  6. TactiCath from EndoSense • Fiber optic sensor within the catheter tip • Axial and lateral force measurement • Sensitivity of 1g • 10 Hz data acquisition rate

  7. 3 mm 1 mm 3 mm 0.5 mm Dynamic Tactile Sensing • Sensing texture of heart wall to collect more information on target areas. • Active sensing using piezo-actuator

  8. FBG Interrogator Piezo-actuator FBG Phase Locked Loop (PLL) Feedback Control • Lock the vibration frequency at resonant frequency • IFOS I-Sense can measure FBG signal at higher than 5 kHz.

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