Cryoablation system with multiple safety detection and prevention device

Abstract

The invention relates to a cryoablation system with a multiple safety detection and prevention device. The system consists of cryoablation equipment and a cryoablation catheter, the cryoablation equipment comprises a human-computer interaction module, a control module and a gas circuit module, the man-machine interaction module is electrically connected with the control module; the control moduleis electrically connected with the gas circuit module; the gas circuit module is connected with the cryoablation catheter; the cryoablation catheter comprises a catheter slender shaft, wherein a catheter handle is arranged at the near end of the catheter slender shaft, a freezing unit is arranged at the far end of the catheter slender shaft, and an air inlet pipe and an air return pipe are arranged in a cavity of the catheter slender shaft. The air inlet pipe and the air return pipe are in fluid communication with an inner cavity of the freezing unit, a liquid plugging mechanism is arranged inthe far end of the catheter slender shaft, and the liquid plugging mechanism is provided with a hydrophobic micropore structure.

Description

technical field [0001] The application belongs to the field of minimally invasive interventional therapy, and specifically relates to a cryoablation system with multiple safety detection and prevention devices. Background technique [0002] Cryoablation is a new technology for the treatment of cardiac arrhythmias. The principle is to take away the tissue heat through the heat absorption and evaporation of the liquid refrigerant, lower the temperature of the target ablation site, and destroy the abnormal cells and tissues, so as to achieve the purpose of treatment. The catheters used in cryoablation need to go inside the human body and go deep into the lesion. Any cryoablation system has certain safety risks, how to effectively detect and prevent related risks is the main problem to be solved in this field. For the cryoablation process, there are two main safety risks: first, the catheter is damaged, causing human blood to enter the catheter and causing partial blood loss i...

AI Technical Summary

Problems solved by technology

Fluid leakage detected by this method Inevitably, fluid (typically patient blood) will enter the catheter, thereby affecting the health of the patient

In addition, since the photoelectric sensor needs to set the transmitter and receiver in the catheter, it will inevitably increase the outer diameter of the catheter, and then there is a problem that it cannot adapt to some blood vessels

Third, the sensor needs power supply lines and signal lines, and at least four wires need to be installed in the catheter. Adding four wires in the narrow space of the catheter is likely to affect its performance

[0004] For the second safety risk, the existing detection system generally judges whether the gas circuit of the conduit is blocked by detecting the intake pressure or flow rate. However, the detection by this method has the defect of detection reaction lag. The risk of overpressure will occur in the balloon of the refrigeration unit within two seconds, and the gas circuit is generally blocked for 2-3 seconds or even longer before it can be effectively detected and the gas source is turned off, posing obvious safety hazards

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