Mapping freezing and melting integrated duct

Abstract

The invention relates to the field of freezing and melting, in particular to a mapping freezing and melting integrated duct. The mapping freezing and melting integrated duct comprises a duct body witha front end segment, a saccule and a manipulating handle, wherein the front end segment is provided with a free end; the saccule is arranged at the free end of the front end segment and can be stuffed with freezing mediums to realize expansion or contraction; the front end segment is mounted on the manipulating handle and can be controlled by the manipulating handle to bend; bar-shaped carriers are arranged on the external surface of the saccule, one end of each bar-shaped carrier is connected with the free end, and the other end of each bar-shaped carrier is connected with one end opposite to the free end, of the saccule; and array electrodes are distributed on each bar-shaped carrier, and all the array electrodes are in spherical array on the external surface of the saccule. The invention aims to provide the mapping freezing and melting integrated duct which is high in modeling efficiency, through the mapping freezing and melting integrated duct, the cooperating state of the sacculeand the target tissue of ostia venarum pulmonalium can be better detected in the pulmonary vein freezing and melting process, finally the melting effect is better, and besides, detection on the melting effects is more accurate.

Description

technical field [0001] The invention relates to the field of cryoablation, in particular to a mapping cryoablation integrated catheter. Background technique [0002] Radiofrequency ablation catheters or cryoablation catheters have been widely used clinically to treat arrhythmias in the atrium, such as atrial premature contraction, atrial flutter, bypass tachycardia, atrial fibrillation, and AV node reentry tachycardia , Ventricular arrhythmias in the ventricle, such as premature ventricular contractions, ventricular tachycardia, ventricular fibrillation, and heart diseases such as long-term QT ​​syndrome. [0003] For the treatment of most arrhythmias, radiofrequency ablation is safe and effective, but radiofrequency ablation still has limitations and disadvantages. Radiofrequency energy can destroy the structure and integrity of endothelium and tissue, and easily lead to the formation of thrombus and embolism. Excessive heat in radio frequency can cause impedance rise, an...

AI Technical Summary

Problems solved by technology

[0004] In order to achieve a deeper ablation depth, higher ablation energy will be used clinically, which will often cause local overheating of myocardial tissue and cause scab, thus affecting the effectiveness and safety of the operation. The saline cools down the ablation part, and a series of complications will occur due to the continuous delivery of saline to the patient during the operation

[0005] At the same time, the application of radiofrequency ablation in the treatment of atrial fibrillation still faces many clinical problems: such as the risk of cardiac perforation, the temperature inconsistency between the surface layer of the myocardium and the interior, phrenic nerve injury, the formation of ablation carbonization / coagulation, and the long learning curve of ablation surgery for atrial fibrillation. The difficulty and technical requirements of the operation are very high, it is difficult for different operators to obtain consistent results, and the success rate varies greatly

[0009] When the balloon reaches the pulmonary vein ostium and is inflated (the balloon is filled with refrigerant or normal temperature gas), it is impossible to know the degree of adhesion of the balloon. Insufficient cooperation with the tissue will affect the effect of cryoablation;

[0010] At the same time, after the ablation is completed, it is impossible to measure the ablation effect of the tissue well. The current measurement of the effect of cryoablation is to set a spiral electrode at the front end of the balloon, and then the electrode touches the pulmonary vein tissue at the front end of the balloon to emit stimulation signals. There are electrodes at the back of the capsule to receive signals. If the stimulation signal can be received, it means that the ablation is successful. Depending on factors such as unsatisfactory conditions or poor temperature control in the later stage, only a very narrow circle is successfully ablated, so the back end of the balloon cannot receive stimulation signals at this time, and the judgment is successful, but the actual ablation effect is not good. Most of the diseased target tissues have not been treated by cryoablation;

[0011] Secondly, when the balloon reaches the left atrium or the pulmonary vein orifice, the front end of the balloon protrudes out of the helical mapping component for modeling. The current modeling speed is slow and the modeling efficiency is low.

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