Abstract
Purpose: To improve the current microwave ablation catheter from causing injury by the over-temperature of catheter during the therapy. A new microwave ablation catheter with water-cooling circulation system and temperature-monitoring system was designed. Its effectiveness was verified in an ex vivo study. Materials and Methods: According to the theory that the heat can be transferred by convection between different mediums to balance the temperature. Designing water-cooling circulation system and temperature-monitoring system based on the microwave ablation catheter. Comparing the temperature of the catheters with or without water-cooling circulation system and comparing the range of ablation tissues by testing on the pork to verify its effectiveness. Results: The temperature of the MWAC without water-cooling circulation system would increase as using times increased. It would be over 45℃ after using the instrument for 3 times continuously, and the range of ablation tissues extends with injury. The temperature of the microwave ablation catheter with water-cooling circulation system would not be over 45℃ after using it for 50 times continuously, and it would not cause injury. Conclusion: The new microwave ablation catheter with water-cooling circulation system and temperature-monitoring system can constantly monitor the temperature and lower the temperature while using the instrument to prevent the patients’ native issue and medical staffs from burning, it can control the ablation range more efficiently and safer.
Temperature monitoring during thermal ablation on ex-vivo organs by Fiber Bragg gratings