Renal artery radio frequency ablation catheter
A technology of radiofrequency ablation and renal artery, applied in the field of electrosurgery, can solve the problems of difficulty in positioning, the working efficiency of multipolar renal artery radiofrequency ablation catheter is not easy to locate, and the working efficiency of unipolar renal artery radiofrequency ablation catheter is low, etc.
Active Publication Date: 2012-09-26
SHANGHAI ANTONG MEDICAL TECH
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Problems solved by technology
Among them, the working efficiency of the unipolar renal artery radiofrequency ablation catheter is low, and the multipolar renal artery radiofrequency ablation catheter has a high working efficiency but is not easy to locate, especially when multi-point ablation is not required.
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[0020] Such as figure 1 As shown, in a preferred embodiment of the present invention, the renal artery radiofrequency ablation catheter of the present invention includes a handle 10, a catheter 20, an electrode holder 33 and a plurality of electrodes. The electrode holder 33 is formed of a shape memory alloy wire, and its surface is insulated. The electrode holder 33 protrudes from the end of the catheter 20 , and its end is inside the catheter 20 . Such as figure 1 As shown, the electrode support 33 in this embodiment is a section of nickel-titanium alloy wire folded in half to form a straight structure, and the top end of the electrode support 33 is formed at the bend. In other embodiments, the electrode holder 33 may also be formed by folding multiple pieces of shape memory alloy wire in half.
[0021] A plurality of electrodes are fixed on the electrode holder 33 and protrude from the surface of the electrode holder 33 , and the electrodes are insulated from the electrod...
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The invention discloses a renal artery radio frequency ablation catheter which comprises a handle, a catheter, an electrode support and a plurality of electrodes, wherein the electrode support is formed by a shape memory alloy wire and is insulated on the surface; the electrode support extends outside from the end of the catheter, and the tail end of the electrode support is arranged in the catheter; the plurality of electrodes are fixed on the electrode support and protrude outside the surface of the electrode support; the handle is internally provided with a heating module which is connected with the electrode support by the catheter for heating the electrode support; and the handle is internally provided with a power-on module which is connected with the plurality of electrodes by the catheter for electrifying the electrodes. According to the renal artery radio frequency ablation catheter, the heating module is controlled to heat the electrode support, and the electrode support is in different shapes, so that the renal artery radio frequency ablation catheter can be switched between two working modes including single-point ablation and multi-point ablation in a selective way.
Description
technical field [0001] The present invention relates to electrosurgery, in particular to a radiofrequency ablation catheter for denervating the sympathetic nerve of the renal artery. Background technique [0002] Refractory hypertension, high blood pressure (sBP ≥ 160mmHg) that is difficult to control even with more than 3 drugs (all of which have used a diuretic), is relatively common in clinical practice, with many pathogenic factors and unclear pathogenesis. Drug treatment The effect is very poor, and the diagnosis and treatment techniques are still immature, which has become one of the major problems in the treatment of hypertension. As a receptor of the central nervous system, the kidney will secrete more renin to activate the RAAS system under the action of the sympathetic nerve, causing a decrease in renal blood flow, resulting in water and sodium retention, and finally an increase in blood pressure; at the same time, the kidney acts as Nervous efferent organs, sympa...
Claims
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IPC IPC(8): A61B18/12
Inventor 汪立秦杰王国辉高润霖徐波张瑞岩
Owner SHANGHAI ANTONG MEDICAL TECH