Melting needle assembly and melting system suitable for treating hypertrophic cardiomyopathy

Abstract

The invention provides a melting needle assembly and a melting system. The melting needle assembly comprises a hollow insulating sleeve pipe and a melting needle, wherein an electrode needle main bodyof the melting needle is movably mounted in the insulating sleeve pipe in a penetrating manner; the far end part of the electrode needle main body is provided with a first main bevel; the near end and the far end of the first main bevel are respectively located on two opposite sides of an axis of the electrode needle main body; the distance between the near end of the first main bevel and the axis of the electrode needle main body is greater than or equal to that between the far end of the first main bevel and the axis of the electrode needle main body; and the inclined angle between the first main bevel and the axis of the electrode needle main body is in the range of 15-60 degrees, so that the melting region of the far end part of the electrode needle main body is not globular or subglobular, but adopts an irregular shape which is deflected facing the opposite side of the first main bevel, the maximum width of the melting region is reduced to be adapted to a flat ventricle intervalstructure, the situation that the melting needle assembly penetrates through to an endocardium is avoided; and the melting needle assembly is especially suitable for radio frequency melting treatmentof the hypertrophic cardiomyopathy.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an ablation needle assembly and an ablation system suitable for treating hypertrophic cardiomyopathy. Background technique [0002] Hypertrophic cardiomyopathy (HCM) is a common autosomal dominant cardiovascular disease, mainly manifested as hypertrophy of one or more segments of the left ventricle (LV). The general diagnostic criteria are: The thickness is greater than or equal to 15mm. When the systolic anterior motion (SAM) of the anterior leaflet of the mitral valve is close to the interventricular septum, resulting in stenosis or even obstruction of the left ventricular outflow tract (LVOT), that is, when the LVOT pressure difference is too large, it is called It is obstructive hypertrophic cardiomyopathy (Hypertrophic Obstructive Cardiomyopathy, HOCM), and HOCM accounts for about 70% of HCM patients. The treatment strategy for HCM is to expand the LVOT to reduce t...

AI Technical Summary

Problems solved by technology

like image 3 and Figure 4 As shown, because the structure of the cardiac interventricular septum S is relatively flat, the spherical or nearly spherical ablation zone A can easily penetrate into the endocardium E ( Figure 4 It is shown that the radiofrequency ablation of the interventricular septal tissue of the fresh pig heart is performed using the existing ablation with a regular triangular pyramid at the distal end. After 12 minutes of ablation, it can be seen that the whitish ablation area A is nearly spherical and has penetrated into the heart membrane E), causing conduction bundle damage and arrhythmia, so the aforementioned existing radiofrequency ablation needles or microwave ablation needles are not suitable for the treatment of hypertrophic cardiomyopathy

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