Multi-pole synchronous pulmonary artery radiofrequency ablation catheter

a radiofrequency ablation catheter and pulmonary artery technology, applied in the field of medical devices, can solve the problems of poor therapy efficacy, limited clinical treatment of pulmonary hypertension, side effects, etc., and achieve the effects of short operation time, simple operation and avoidance of heating blood

Inactive Publication Date: 2014-06-26
PULNOVO MEDICAL WUXI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018]In some embodiments and/or methods of use, the catheter can heat, with radiofrequency energy, the tissue in direct contact with the electrode and avoid heating blood. Additionally, the catheter can provide advantages of simple operation, short operation time and controllable precise ablation. The catheter body can be preferably made of a polymer material, which is a poor heat conductor, so that it can avoid transmitting the heat when heating the electrodes to the flowing blood contacting the catheter body, thereby effectively avoid heating the blood.
[0019]Furthermore, the shape or curvature of the flexible end can be adjusted by operating the adjustment apparatus, which allows the operator to control the handle with one hand, so as to adjust the curvature of the flexible end

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 limitati

Method used

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  • Multi-pole synchronous pulmonary artery radiofrequency ablation catheter
  • Multi-pole synchronous pulmonary artery radiofrequency ablation catheter
  • Multi-pole synchronous pulmonary artery radiofrequency ablation catheter

Examples

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Effect test

example 1

[0055]Through the example below and with reference to FIGS. 1-3, some of the technical solutions that can be achieved by various embodiments are further described below.

[0056]In some embodiments, a multi-pole synchronous pulmonary artery radiofrequency ablation catheter for de-sympathetic in the pulmonary artery can include a catheter body 1 that has a distal end and a proximal end. The distal end can be provided with a flexible end 3 and the proximal end can be provided with a control handle 2. A pull wire can extend in the catheter body.

[0057]Preferably, the catheter body can be made of a polymer material, which is a poor heat conductor, so that it can avoid transmitting or reduce the amount of heat transferred from the electrodes to the flowing blood contacting the catheter body, and thereby can better prevent the electrode from heating the blood flow.

[0058]The flexible end 3 can include a proximal end and a distal end. An annular ring 4 can be arranged on the distal end. The fle...

example 2

[0074]A multi-pole synchronous pulmonary artery radiofrequency ablation catheter comprises a control handle 2, a catheter body 1, and an annular ring 4. The control handle 2 can be provided with an adjustment apparatus, the catheter body 1 can be hollow, and a cavity can be arranged in the catheter body 1. One or more lead wires 6, temperature sensing wires 7 and a pull wire 8 can be arranged in cavity.

[0075]One end of catheter body can be flexible, and the flexible end 3 can be connected to the annular ring 4. The other end of the catheter body can be connected to the control handle 2. One end of the pull wire 8 can be connected to the flexible end 3, and the other end of the pull wire 8 can be connected to the adjustment apparatus of the control handle, the adjustment apparatus adjusts the tension of the pull wire 3 to control the curvature of the flexible end. This allows the operator to control the handle with one hand and adjust the curvature of the flexible end 3 easily. There...

example 3

[0084]Example 3 is similar to Example 1 and Example 2, and the differences can include an infusion tube arranged in the catheter body, a group of evenly distributed through holes 15 (FIG. 4) arranged on one or more of the electrodes 5, with a bore diameter of 1 μm. One end of the infusion tube can be connected to the electrodes 5 through the annular ring 4 such that fluid diffuses out from the through holes 15 on each of the electrodes 5. For example, the annular ring 4 can include or define at least one lumen extending between a proximal end of the annular ring 4 and to the through holes 15 so as to form a closed fluidic connection. In such embodiments, a distal end of the infusion tube can be connected to the proximal end of the lumen in the annular ring 4. The other end of the infusion tube can be connected to a transfusion system, such as a constant-flux pump or other known pumps.

[0085]When electrodes 5 generates current, the liquid automatically diffuses from the through holes ...

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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 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 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 multi-pole synchronous pulmonary artery radiofrequency ablation 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 efficacy thereof is poor. Incidence of primary pulmonary ...

Claims

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Application Information

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IPC IPC(8): A61B18/00
CPCA61N1/05A61B18/1492A61B2017/00867A61B2018/00375A61B18/00A61B2018/1407A61B2018/1467A61B2218/002A61B2018/00797A61N1/06A61B2017/00323A61B2018/00029A61B2018/00166F04C2270/041A61B2018/00214A61B2018/00404A61B2018/00577A61B2018/00791A61M25/0147A61B2018/00821A61N7/02A61N2007/003
Inventor CHEN, SHAOLIANG
Owner PULNOVO MEDICAL WUXI
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