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Renal denervation ablation catheter with pre-bent catheter body

A technology for ablation of catheters and sympathetic nerves, applied in the field of medical devices, can solve problems such as small diameter difficulties and complex catheter structures, and achieve the effects of easy manufacture, simple structure, and reliable curvature

Inactive Publication Date: 2014-10-01
远见企业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. There is a certain degree of randomness in the doctor's control of the degree of bending
[0007] 2. This kind of catheter is bent by wire drawing, so the structure of the catheter is complicated, and it is very difficult to achieve a small diameter such as 4F

Method used

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  • Renal denervation ablation catheter with pre-bent catheter body
  • Renal denervation ablation catheter with pre-bent catheter body
  • Renal denervation ablation catheter with pre-bent catheter body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] An embodiment of a renal artery sympathetic nerve ablation catheter with a pre-bent tube body of the present invention is as follows: Figure 1 to Figure 5As shown, the ablation catheter includes a main body 1, an electrode 2, a handle 5, an electric wire 6 and an electrical connector 7, and the two ends of the main body 1 are respectively connected with the electrode 2 and the handle 5, and the main body 1 has a lumen 11 and a tube wall 12. The wire 6 is inserted into the lumen 11 of the main body 1. One end of the wire 6 is connected to the electrode 2, and the other end passes through the handle 5 and then connected to the electrical connector 7. The end of the main body 1 close to the electrode 2 is the main body 1, the tube wall 12 at the distal end is interspersed with an in-tube shape-memory metal wire 3 along the axial direction of the main body 1, and the material of the in-tube shape-memory wire 3 is nickel-titanium memory alloy, and the shape memory The metal...

Embodiment 2

[0051] Embodiment 2 of a renal artery sympathetic nerve ablation catheter with a pre-bent tube body of the present invention differs from Embodiment 1 only in the structure of the shape memory wire inside the tube. The ablation catheter includes a main body 1, electrodes 2. Handle 5, electric wire 6 and electrical connector 7. The two ends of the main body 1 are respectively connected with the electrode 2 and the handle 5. The main body 1 has a lumen 11 and a tube wall 12. The wire 6 is inserted into the lumen of the main body 1. In 11, one end of the electric wire 6 is connected to the electrode 2, and the other end passes through the handle 5 and is connected to the electric connector 7. An in-tube shape memory wire 3a is interspersed along the axial direction of the main body 1. The material of the in-tube shape-memory wire 3a is nickel-titanium memory alloy. After the metal wire 3a is inserted, the distal end of the main body 1 forms a bent-shaped distal pre-bent tube sect...

Embodiment 3

[0057] Embodiment 3 of a renal artery sympathetic nerve ablation catheter with a pre-bent tube body of the present invention differs from Embodiment 1 only in the structure of the shape memory wire inside the tube. The ablation catheter includes a main body 1, electrodes 2. Handle 5, electric wire 6 and electrical connector 7. The two ends of the main body 1 are respectively connected with the electrode 2 and the handle 5. The main body 1 has a lumen 11 and a tube wall 12. The wire 6 is inserted into the lumen of the main body 1. In 11, one end of the electric wire 6 is connected to the electrode 2, and the other end passes through the handle 5 and is connected to the electric connector 7. An in-tube shape memory wire 3b is interspersed along the axial direction of the main body 1. The material of the in-tube shape-memory wire 3b is nickel-titanium memory alloy. After the metal wire 3b is inserted, the distal end of the main body 1 forms a bent-shaped distal pre-bent tube sect...

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Abstract

The invention discloses a renal denervation ablation catheter with a pre-bent catheter body. The ablation catheter comprises a main catheter body, an electrode, a handle, an electric wire and an electric terminal; the two ends of the main catheter body are connected with the electrode and the handle, respectively; the main catheter body is provided with a tubular cavity and a tubular wall; the electric wire goes through the tubular cavity of the catheter body, and one end of the electric wire is electrically connected with the electrode, while the other end of the electric wire is electrically connected with the electric wire of the electric terminal after going through the handle; one end, close to the electrode, of the main catheter body is a far end of the main catheter body, and an in-catheter shape memory metal wire is inserted in the tubular wall of the far end in the axial direction of the main catheter body and provided with a bent part; after the in-catheter shape memory metal wire is inserted in the tubular wall so that the far end of the main catheter body is provided with a bent far-end pre-bent catheter section, and the bent far-end pre-bent catheter section is capable of providing reliable and controllable curvature. The ablation catheter is simple to operate, easy to manufacture, and capable of providing reliable curvature.

Description

technical field [0001] The invention relates to a medical device, in particular to a renal artery sympathetic nerve ablation catheter with a pre-bent tube body. Background technique [0002] In recent years, transcatheter renal sympathetic denervation (RDN) has attracted widespread attention as a non-drug treatment for refractory hypertension. Since excessive activation of renal sympathetic nerves is an important pathophysiological basis for the onset and maintenance of hypertension, Moreover, most of the renal sympathetic nerve fibers enter the kidney through the adventitia of the main renal artery. This anatomical feature determines that RDN can selectively ablate most of the renal sympathetic nerve fibers. The energy released by the radiofrequency catheter inserted into the renal artery can penetrate the outer and medial membranes of the blood vessels, selectively damage the sympathetic nerve fibers of the adventitia, and achieve the purpose of reducing the activity of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/12
Inventor 不公告发明人
Owner 远见企业有限公司
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