Fiber Optic Sensorized Tools for Cardiology Applications

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
Dynamic Tactile Sensing

• Sensing texture of heart wall to collect more
  information on target areas.
• Active sensing using piezo-actuator

8
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.