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Catheter with both balloon dilatation function and radiofrequency ablation function and ablation method thereof

A radiofrequency ablation and catheter technology, used in balloon catheters, catheters, dilators, etc., can solve the problems of different blood vessel diameters, inability to fully adhere to the wall, and inability to achieve therapeutic effects, achieving obvious effects, reducing restenosis, maintaining long-term smooth effect

Pending Publication Date: 2017-05-31
SHANGHAI GOLDEN LEAF MED TEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Although the intraluminal catheter provided by the above-mentioned utility model patent can ablate the renal artery sympathetic nerve, the degree of balloon expansion cannot be controlled during the operation, and the diameter of different parts of the blood vessel is different due to hyperplasia, which may make the electrode unable to be attached. The wall may not be adequately attached to the wall, and the expected therapeutic effect cannot be achieved

Method used

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  • Catheter with both balloon dilatation function and radiofrequency ablation function and ablation method thereof
  • Catheter with both balloon dilatation function and radiofrequency ablation function and ablation method thereof
  • Catheter with both balloon dilatation function and radiofrequency ablation function and ablation method thereof

Examples

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no. 1 example 〉

[0043] Such as figure 1 As shown, as the first embodiment of the present invention, a catheter combined with an expandable balloon and a common wall-attached ablation electrode includes a catheter front end 1 , a long tube 2 and a handle 4 .

[0044] The handle 4 is provided with a pressure regulating controller 3 (referred to as pressure controller), a push-pull button 41 and a wire drawing 5 (only the tail end of the wire drawing 5 is shown). The drawing wire 5 passes through the catheter front end 1, the long tube 2 and the handle 4.

[0045] The catheter tip 1 includes a balloon 10 and one or more electrodes 20 attached to the periphery of the balloon 10 . The catheter tip 1 also includes a plurality of thermocouples 40 . As an optional solution, the catheter front end 1 may also include a plurality of pressure sensors 30 . Setting the pressure sensor can intuitively understand the magnitude of the adhesion force of the electrode 20 . The pressure sensor 30 can be omit...

no. 2 example

[0057] For the sake of brevity and effectiveness of description, only the difference between this embodiment and the first embodiment is described here.

[0058] Such as figure 2 As shown, in this embodiment, the balloon 10 is provided with a fixing bracket 21 outside. One end of the bracket 21 is fixed to the top end of the catheter, and is connected to the head end connector 51 (refer to figure 1 ) on; the other end emerges from the long tube. The fixed stent 21 can be bundled, but cannot be separated from the balloon, including but not limited to a basket-type stent.

[0059] In the figure the support is a basket-type support on which a plurality of electrodes 20 are arranged. After the stent 21 is expanded, the electrode 20 is partially or completely embedded in the tissue, which increases the adhesion force of the electrode and improves the ablation efficiency. The electrode 20 is arranged on the stent wire 211 of the stent 21, such a structure makes the balloon of t...

no. 3 example

[0063] For the sake of brevity and effectiveness of description, only the difference between this embodiment and the first embodiment is described here.

[0064] Unlike the first embodiment and the second embodiment, in combination image 3 ~ Fig. 4, in this embodiment, a detachable stent 21 is provided outside the balloon 10, including a mesh stent, a petal stent or a helical stent (hereinafter collectively referred to as: stent) and the like. After being expanded, the detachable stent 21 can be detached from the balloon 10 and placed in the blood vessel. After the stent 21 is separated from the balloon 10, since the electrode 20 still exists on the balloon 10, after the balloon 10 is moved to a position other than the stent 21, the electrode 20 on the balloon 10 can still expand other blood vessel parts Ablation is now equivalent to a catheter without a stent (first embodiment).

[0065] image 3 Shown is the manner in which the electrodes 20 are arranged on the balloon 1...

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Abstract

The invention discloses catheter with both a balloon dilatation function and a radiofrequency ablation function and an ablation method thereof. The radiofrequency ablation catheter is used for ablating hyperplastic tissue or nerves on the vessel wall and comprises an inflatable balloon located at the front end of the catheter, an ablation part located on the outer wall of the balloon or in the balloon, and when the balloon gradually inflates, the ablation part ablates the hyperplastic tissue or nerves. The radiofrequency ablation catheter can combine the inflation effect of the inflatable balloon with the ablation effect of the radiofrequency ablation catheter and achieve inflation and ablation simultaneously.

Description

technical field [0001] The invention relates to a catheter with the functions of balloon expansion and radiofrequency ablation, and also relates to an ablation method using the radiofrequency ablation catheter, which belongs to the technical field of interventional medical devices. Background technique [0002] Interventional medical devices are an important branch of the medical device industry developed in the past 10 years, and related interventional therapy is a brand-new technology, which opens a new chapter in medical technology. Interventional therapy is a diagnosis and treatment operation performed by using a series of interventional instruments and materials and modern digital diagnosis and treatment equipment. Compared with traditional surgery, interventional treatment does not require surgery, only local anesthesia is required, and a small incision of 1 to 2 mm is required. It has the advantages of less bleeding, less trauma, fewer complications, safety and reliab...

Claims

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Application Information

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IPC IPC(8): A61B18/12A61B18/14A61M25/10A61M29/04
CPCA61M25/10A61M25/104A61M29/02A61B18/12A61B18/14A61B2018/00595A61B2018/00285A61B2018/00422A61B2018/00434A61M2210/12
Inventor 董永华沈美君
Owner SHANGHAI GOLDEN LEAF MED TEC
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