Cardiac impulse electric field ablation catheter

Abstract

The invention discloses a cardiac impulse electric field ablation catheter. The cardiac impulse electric field ablation catheter comprises an annular distal end, wherein the annular distal end comprises an arc-shaped end pipe body, annular electrodes in an odd number are distributed on the end pipe body at equal intervals, and the electrodes are connected to a first connector arranged on a handlethrough wires penetrating through the pipe body; and an end hard pipe is connected with the end pipe body, a supporting member penetrates through the end pipe body and the end hard pipe, two magneticpositioning sensors are arranged in the end pipe body and fixed on the supporting member, and a magnetic positioning sensor is arranged in the end hard pipe. External equipment transmits high voltagepulses and electrical signals to the catheter to achieve ablation, and the catheter also transmits feedback information to the external equipment for positioning, modeling and the like. High-voltage pulse energy can be concentrated on target tissue for ablation, the form of the catheter can be monitored in real time, safety accidents are avoided, and the functions of mapping, modeling and ablationare integrated.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a heart pulse electric field ablation catheter. Background technique [0002] Atrial fibrillation is a common persistent cardiac arrhythmia, and the incidence of atrial fibrillation increases with age, reaching 10% in people over 75 years old. During atrial fibrillation, the frequency of atrial excitation reaches 300-600 beats per minute, which is not only faster than the normal heartbeat, but also absolutely irregular. The atrium loses effective contraction function, which seriously endangers human health and affects the quality of life. The reason why the pulmonary veins are the most common local lesion in atrial fibrillation is due to the presence of the pulmonary vein muscle sleeve, which is the myocardial tissue homologous to the atrial myocytes extending from the left atrium into the pulmonary veins. There are myocardial cell colonies between the intima and adventitia of the...

AI Technical Summary

Problems solved by technology

[0005] However, the voltage of the high-voltage pulse is relatively high, and the energy between the electrodes should not be too concentrated, which is prone to safety accidents. It is necessary to strengthen the insulation of the electrodes and the internal insulation of the catheter. If the existing ablation catheter uses high-voltage pulses for ablation, ionization is likely to occur between the electrodes. And the time of high-voltage pulse ablation is short, requiring more precise positioning

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