CN202933013U - Balloon dilatation type multi-electrode radiofrequency ablation catheter - Google Patents

Abstract

The utility model provides a balloon dilatation type multi-electrode radiofrequency ablation catheter which comprises a handle, a catheter main body, a balloon and a plurality of electrodes; the plurality of electrodes are arranged on the outer surface of the balloon; the balloon is positioned at the front end of the catheter main body; the back end of the catheter main body is mounted on the handle; electric connection elements which are used for electrically connecting the plurality of electrodes with a radio-frequency current generating device respectively are arranged in the handle and the catheter main body; besides, an infusion tube connected with the balloon is further arranged in the catheter main body; an infusion component used for feeding liquid into the infusion tube is arranged on the handle; the interiors of the infusion component, the infusion tube and the balloon form a mutually communicated closed channel; the radiofrequency ablation catheter further comprises a thermocouple for detecting temperature, which is connected with at least one electrode; and a conducting wire used for transmitting electrical signals of the thermocouple is further arranged in the catheter main body and the handle.

Description

A kind of balloon expandable formula multi-electrode radio frequency ablation catheter

Technical field

This utility model relates to electrosurgery, relates in particular to a kind of for arteriorenal sympathetic nerve is carried out to denervated radio frequency ablation catheter.

Background technology

Intractable hypertension, use still unmanageable hypertension (sBP >=160mmHg) of medicine more than 3 kinds (all having used a diuretic), more common clinically, its paathogenic factor is numerous, pathogenesis is indefinite, medication effect is very poor, and diagnosis and treatment technology are still not mature enough, become one of great difficult problem of hypertension therapeutic.Due to the receptor of kidney as nervus centralis, under orthosympathetic effect, can secrete more feritin and activate the RAAS system, cause that renal blood flow descends, cause the storage of water sodium to be stayed, finally cause hypertension; Simultaneously, kidney spreads out of organ as nerve, and sympathetic excitement is communicated to brain conversely, causes bad general reaction.Therefore, intractable hypertension application renal denervation is treated.The article be published on New England Journal of Medicine in 2009 as people such as Schlaich, shown after the renal denervation treatment, the noradrenaline levels decline 50-75% discharged in nephridial tissue, in blood plasma, the feritin level descends 50%, the renal blood flow amount increases by 57%, find that this treatment has effect to the central nervous system simultaneously, can significantly improve nervimuscular galvanic reflex.

The renal artery radiofrequency ablation art is a kind of by the electrode catheter intravascular is sent into to specific part in renal artery, discharges radio-frequency current and causes the necrosis of renal artery sympathetic nerve local solidification, reaches denervated Interventional technology.The radio-frequency current damage range is little, can not cause body harm, so the renal artery radiofrequency ablation art has become a kind of orthosympathetic method of effective removal renal artery.At present, occurred that the one pole radio frequency ablation catheter for renal artery is to implement the renal artery radiofrequency ablation operation.The head of one pole radio frequency ablation catheter for renal artery has single electrode, can carry out melting of single-point location to the renal artery sympathetic nerve, and because once-through operation can only be melted a some position, therefore, work efficiency is lower.

Given this, this utility model provides a kind of new multi-electrode radio frequency ablation catheter.

The utility model content

In view of the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide a kind of multi-electrode radio frequency ablation catheter that can simultaneously be melted a plurality of sites.

The multi-electrode radio frequency ablation catheter that this utility model provides comprises handle, catheter main body, sacculus and a plurality of electrode, described a plurality of electrode arrangement is in the outer surface of described sacculus, described sacculus is positioned at the front end of described catheter main body, the rear end of described catheter main body is installed on described handle, in described handle and catheter main body, is provided with for described a plurality of tip electrodes being electrically connected to respectively to the electrical connecting element of radio-frequency current generator; In addition, also be provided with the tube for transfusion be connected with described sacculus in described catheter main body, also be provided with on described handle for liquid being inputted to the infusion part of described tube for transfusion, described infusion part, tube for transfusion, the inner closed channel be interconnected that forms of sacculus; Described radio frequency ablation catheter also comprises the thermocouple for detecting temperature, with at least one electrode, is connected, and in described catheter main body and handle, also is provided with for transmitting the wire of the thermocouple signal of telecommunication.

A crucial part of multi-electrode radio frequency ablation catheter provided by the utility model is to adopt sacculus to carry a plurality of electrodes.When sacculus fills liquid, in contraction state, under contraction state, the operator can operate this radio frequency ablation catheter does not make sacculus arrive the desired locations in renal artery.Then by infusion part and tube for transfusion, liquid is filled to sacculus, therefore sacculus expands and presses close to blood vessel, the site that a plurality of electrodes that carry on its surface melt near a plurality of needs also so respectively, thus a plurality of sites are melted simultaneously, greatly increase work efficiency.

Preferably, described electrical connecting element comprises many connecting lines and adapter, and an end of described connecting line is electrically connected to described electrode respectively, and the other end is electrically connected to described adapter respectively; Described adapter is installed in described handle.Described connecting line can be wrapped in the insulation outer tube and become a branch ofly, also can be separated from each other, and connects independently of one another described electrode and adapter.

Preferably, described infusion part is the outside body that stretches to be positioned on the housing of described handle, and described tube for transfusion is communicated with and forms the passage for liquid communication of sealing with described body.More preferably, the outer end of described body is arranged for the interface joined with syringe.

Preferably, described electrode is fixedly attached on the outer surface of described sacculus; Perhaps, described multi-electrode radio frequency ablation catheter also comprises wire rack mount, and described electrode is arranged on described wire rack mount, the described sacculus of described wire rack mount outsourcing.

Preferably, described sacculus adopts elastomeric material to make.More preferably, described elastomeric material is plastics.

In this utility model, described liquid is preferably water or normal saline or contrast agent.The preferred number of described electrode is 3-16.

Multi-electrode radio frequency ablation catheter provided by the utility model, can be melted a plurality of sites simultaneously, thereby greatly be provided work efficiency.

Technique effect below with reference to accompanying drawing to design of the present utility model, concrete structure and generation is described further, to understand fully the purpose of this utility model, feature and effect.

The accompanying drawing explanation

Fig. 1 is a kind of structural representation of the preferred specific embodiment of the handle of radio frequency ablation catheter of the present utility model.

Fig. 2 is a kind of cross sectional representation of the preferred specific embodiment of the catheter main body of radio frequency ablation catheter of the present utility model.

Fig. 3 is the structural representation (sacculus is in contraction state) of a kind of preferred specific embodiment of the sacculus of radio frequency ablation catheter of the present utility model and electrode.

Fig. 4 is the structural representation (sacculus is in swelling state) of a kind of preferred specific embodiment of the sacculus of radio frequency ablation catheter of the present utility model and electrode.

The specific embodiment

Fig. 1-Fig. 4 shows a kind of preferred specific embodiment of radio frequency ablation catheter provided by the utility model.

As Figure 1-Figure 4, radio frequency ablation catheter in this specific embodiment comprises handle 1, cathetermain body 2,sacculus 3, a plurality ofelectrode 4,electrode 4 is arranged in the outer surface ofsacculus 3,sacculus 3 is positioned at the front end of cathetermain body 2, the rear end of cathetermain body 2 is installed on handle 1, in handle 1 and cathetermain body 2, is provided with for a plurality ofelectrodes 4 being electrically connected to respectively to the electrical connecting element of radio-frequency current generator.Electrical connecting element comprises many connectinglines 6 andadapter 5, an end of many connectinglines 6 with a plurality ofelectrodes 4, be electrically connected to respectively, the other end is electrically connected toadapter 5;Adapter 5 is installed in handle 1, forelectrode 4 is connected to the radio-frequency current generator.

In addition, also be provided with the tube fortransfusion 7 be connected withsacculus 3 in cathetermain body 2, also be provided with on handle 1 for liquid being inputted to theinfusion part 8 of tube fortransfusion 7,infusion part 8, tube fortransfusion 7, the inner closed channel be interconnected that forms of sacculus 3.The path of this closed channel and connectingline 6 is separate.Therefore, in the inside of cathetermain body 2, except comprising this closed channel, also leave the space that connectingline 6 is set.Connecting line 6 can by be wrapped in insulation become in outer tube 9 a branch of, will be as depicted in figs. 1 and 2; Connectingline 6 also can be separated from each other, independently of one anotherconnection electrode 4 andadapter 5.

In this specific embodiment,infusion part 8 is the outside body that stretches on the housing that is positioned at handle 1, and tube fortransfusion 7 is communicated with and forms the passage for liquid communication of sealing with this body.Theouter end 10 ofinfusion part 8 is arranged for the interface joined with syringe.Like this, in the time ofsacculus 3 need to be expanded, suction can be had the syringe of liquid (for example water) to be directly connected to theouter end 10 ofinfusion part 8, pushing syringe makes liquid entersacculus 3, therebysacculus 3 is expanded.

In this specific embodiment,electrode 4 is arranged in the outer surface of sacculus 3.A plurality of neural site that need to melt can be arranged to correspond respectively in the spacing ofelectrode 4 and orientation.Electrode 4 may be fixedly attached on the outer surface ofsacculus 3, and the expansion ofsacculus 3 is directly carriedelectrode 4 and together moved.Also can wire rack mount be set in addition again,electrode 4 is arranged on wire rack mount, wire rackmount outsourcing sacculus 3, and whensacculus 3 expands,sacculus 3 makes it expansion against wire rack mount, thus 4 motions of band moving electrode.

In this specific embodiment, for the ease of expansion and the contraction ofsacculus 3,sacculus 3 adopts elastomeric material, as plastics are made.

In this specific embodiment, radio frequency ablation catheter also comprises the thermocouple (not shown), with at least one electrode, is connected, for detecting temperature.In cathetermain body 2 and handle 1, also be provided with for transmitting the wire of the thermocouple signal of telecommunication.

More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all those skilled in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection domain by claims.

Claims (10)

1. a balloon expandable formula multi-electrode radio frequency ablation catheter, it is characterized in that, comprise handle, catheter main body, sacculus and a plurality of electrode, described a plurality of electrode arrangement is in the outer surface of described sacculus, described sacculus is positioned at the front end of described catheter main body, the rear end of described catheter main body is installed on described handle, in described handle and catheter main body, is provided with for described a plurality of tip electrodes being electrically connected to respectively to the electrical connecting element of radio-frequency current generator; In addition, also be provided with the tube for transfusion be connected with described sacculus in described catheter main body, also be provided with on described handle for liquid being inputted to the infusion part of described tube for transfusion, described infusion part, tube for transfusion, the inner closed channel be interconnected that forms of sacculus; Described radio frequency ablation catheter also comprises the thermocouple for detecting temperature, with at least one electrode, is connected, and in described catheter main body and handle, also is provided with for transmitting the wire of the thermocouple signal of telecommunication.

2. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 1, it is characterized in that, described electrical connecting element comprises many connecting lines and adapter, and an end of described connecting line is electrically connected to described electrode respectively, and the other end is electrically connected to described adapter respectively; Described adapter is installed in described handle.

3. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 1, it is characterized in that, described infusion part is the outside body that stretches to be positioned on the housing of described handle, and described tube for transfusion is communicated with and forms the passage for liquid communication of sealing with described body.

4. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 3, is characterized in that, the outer end of described body is arranged for the interface joined with syringe.

5. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 1, is characterized in that, described electrode is fixedly attached on the outer surface of described sacculus.

6. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 1, is characterized in that, described multi-electrode radio frequency ablation catheter also comprises wire rack mount, and described electrode is arranged on described wire rack mount, the described sacculus of described wire rack mount outsourcing.

7. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 1, is characterized in that, described sacculus adopts elastomeric material to make.

8. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 1, is characterized in that, described elastomeric material is plastics.

9. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 1, is characterized in that, described liquid is water or normal saline or contrast agent.

10. balloon expandable formula multi-electrode radio frequency ablation catheter as claimed in claim 1, is characterized in that, the number of described electrode is 3-16.

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