Pulmonary artery ablation catheter

Abstract

A multi-pole synchronous pulmonary artery radiofrequency ablation catheter, wherein an adjustment apparatus is arranged on a control handle; a catheter body is hollow, and a cavity is arranged therein; a lead wire, a temperature sensing wire and a pull wire are arranged in the cavity; one end of the catheter body is flexible, and the flexible end is connected to an annular ring; the other end of the catheter body is connected to the control handle; one end of the pull wire is connected to the flexible end, and the other end of the pull wire is connected to the adjustment apparatus on the control handle, the tension of the pull wire is adjusted through the adjustment apparatus to achieve radian control of the flexible end; a shape memory wire is arranged in the annular ring, one end of the shape memory wire extends to the end of the annular ring and the other end of the shape memory wire passes through the root of the annular ring and is fixed on the flexible end of the catheter body; the annular ring is provided with an electrode group with each electrode connected to the lead wire and temperature sensing wire; the lead wire and temperature sensing wire go through the catheter body and are electrically connected to the control handle. The device uses cold saline perfusion method to protect the vascular intima and possesses advantages of simple operation, short operation time and controllable precise ablation. The device can be used to treat pulmonary hypertension with pulmonary denervation.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a Continuation Application of U.S. application Ser. No. 14 / 079,230, filed on Nov. 13, 2013, which claims priority to Chinese Application No. 201210453470.4, filed on Nov. 13, 2012 and Chinese Application No. 201310103141.1, filed on Mar. 27, 2013, the entire contents of each of which are hereby incorporated by reference.BACKGROUND OF THE INVENTIONS[0002]1. Field of the Inventions[0003]The present inventions relate to medical devices for treatment of pulmonary hypertension in the pulmonary artery by de-sympathetic methods, for example, with pulmonary artery catheters, as well as methods for diagnosis and method of treating pulmonary hypertension.[0004]2. Description of the Related Art[0005]Pulmonary hypertension is to be an intractable diseases in the cardiovascular, respiratory, connective tissue, immune and rheumatic systems. Currently available clinical treatments of pulmonary hypertension are limited and therapy eff...

AI Technical Summary

Benefits of technology

The patent discloses a new treatment for pulmonary hypertension that targets the nerves and receptors in the pulmonary artery. The patent describes a catheter that uses radiofrequency energy to ablate (destroy) the tissue in the pulmonary artery that is causing the hypertension. The catheter is designed to heat the tissue in direct contact with the electrodes and avoid heating the blood, which could cause damage to the blood vessels. The catheter can also cool down the area around the ablation site to protect the vascular wall, and can be easily adjusted for placement during treatment. The technical effects of this invention include a reduction in pulmonary artery pressure, improved treatment outcomes for pulmonary hypertension, and efficient and controlled ablation of the targeted tissue.

Problems solved by technology

Currently available clinical treatments of pulmonary hypertension are limited and therapy efficacy thereof is poor.

However, some of those drugs have serious limitations including many side effects, inappropriate dosage form, expensive cost and unreliable efficacy, and thus many have not been widely applied in clinical treatment.

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