Renal artery cold saline water radio frequency ablation controllable electrode catheter

Abstract

The invention discloses a renal artery cold saline water radio frequency ablation controllable electrode catheter, aiming at solving the technical problem that when radio frequency ablation is carried out on the sympathetic nerves on the renal artery wall, the controllable electrode catheter can reduce the damage for the inner walls of blood vessels. The far end of a catheter body is connected with an electrode head which is wound into a densely-winding spiral spring with the external diameter of 0.08-2.00mm and the length of 1.5-4mm by a platinum-iridium alloy wire or platinum-tungsten wire; and the end of the far end is in a semi-circular spherical shape. Compared with the prior art, the renal artery cold saline water radio frequency ablation controllable electrode catheter is provided with the electrode head which is wound into the densely-winding spiral spring by a platinum-iridium alloy wire or platinum-tungsten wire with the diameter of 0.005-0.3mm, so that the ablation spot is narrow and the depth is high; therefore, hypertension can be treated by the electrode head which emits radio frequency energy to damage the renal sympathetic nerves, and the minimum damage is caused to the inner walls of the renal artery vessels when the sympathetic nerves on the outer wall of the renal artery vessels are broken.

Description

technical field [0001] The invention relates to a medical device for interventional therapy, in particular to a radiofrequency ablation electrode catheter for treating obstinate hypertension. Background technique [0002] Resistant hypertension is clinically common, with many pathogenic factors, unclear pathogenesis, and poor drug treatment effect. The medical profession has always believed that the sympathetic nerve excitation of the kidney is closely related to the increase of blood pressure. When the sympathetic nerves of the kidneys are over-excited, the blood vessels of the kidneys contract, reducing the excretion of the kidneys, retaining water and salt in the body, and promoting the secretion of renin by the kidneys, which leads to the increase of angiotensin II and aldosterone in the blood, and the latter two substances , is the factor that raises blood pressure. [0003] It can be seen that blood pressure is mainly regulated by the kidneys. Nowadays, the idea of ...

AI Technical Summary

Problems solved by technology

The second prior art is to use an ablation catheter for treating arrhythmia to ablate the sympathetic nerve on the renal artery to treat refractory hypertension. This kind of catheter has a relatively large diameter, which makes it inconvenient to operate in the renal artery, and the ablation area is relatively large , and also cause greater damage to the renal arteries

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