Cardiac pulse electric field ablation catheter

Abstract

The invention discloses a heart pulse electric field ablation catheter, which comprises a ring-shaped distal end. The ring-shaped distal end includes an arc-shaped terminal tube body. An odd number of ring-shaped electrodes are distributed on the terminal tube body at equal intervals. The electrodes pass through the tube body. The wire is connected to the first connector provided on the handle; the end hard tube is connected to the end tube body, the support member is arranged inside the end tube body and the end hard tube, and two magnetic positioning sensors are arranged in the end tube body, the two magnetic The positioning sensor is fixed on the support member, and a magnetic positioning sensor is arranged in the end hard tube. External equipment transmits high-voltage pulses and electrical signals to the catheter to achieve ablation, and the catheter also transmits feedback information to external equipment for positioning, modeling, and other processing. The invention can concentrate the high-voltage pulse energy on the target tissue for ablation, and can also monitor the shape of the catheter in real time to avoid safety accidents, and integrates the functions of mapping, modeling and ablation.

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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