CN103169537A - Multi-electrode net-shaped radio frequency ablation catheter - Google Patents
Multi-electrode net-shaped radio frequency ablation catheter Download PDFInfo
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- CN103169537A CN103169537A CN2013100594429A CN201310059442A CN103169537A CN 103169537 A CN103169537 A CN 103169537A CN 2013100594429 A CN2013100594429 A CN 2013100594429A CN 201310059442 A CN201310059442 A CN 201310059442A CN 103169537 A CN103169537 A CN 103169537A
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- radio frequency
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- netted
- frequency ablation
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Abstract
The invention discloses a multi-electrode net-shaped radio frequency ablation catheter which comprises a handle, a catheter main body, a net-shaped frame, a center rod and a plurality of electrodes. Compared with the prior art, ablation can be conducted to a plurality of position points through the multi-electrode net-shaped radio frequency ablation catheter and work efficiency is greatly improved.
Description
Technical field
The present invention relates to electrosurgery, relate in particular to a kind of for arteriorenal sympathetic nerve is carried out denervated radio frequency ablation catheter.
Background technology
Intractable hypertension, namely 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, cause at last hypertension; Simultaneously, kidney spreads out of organ as nerve, and sympathetic excitement is communicated to brain conversely, causes bad general reaction.Therefore, intractable hypertension is used the renal denervation treatment.The article that was published on New England Journal of Medicine in 2009 as people such as Schlaich, shown through after the renal denervation treatment, the noradrenaline levels decline 50-75% that discharges in nephridial tissue, in blood plasma, the feritin level descends 50%, the renal blood flow amount increases by 57%, find that simultaneously this treatment has effect to the central nervous system, can significantly improve nervimuscular galvanic reflex.
The renal artery radiofrequency ablation art is a kind of by the electrode catheter intravascular is sent into specific part in renal artery, discharges radio-frequency current and causes renal artery sympathetic nerve local solidification downright bad, 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, the one pole radio frequency ablation catheter for renal artery has appearred 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, the invention provides a kind of new multi-electrode radio frequency ablation catheter.
Summary of the invention
In view of the defects of prior art, of the present inventionly be to provide at present a kind of multipole netted radio frequency ablation catheter, to realize and to melt a plurality of sites simultaneously.
Technical scheme of the present invention is as follows:
A kind of multipole netted radio frequency ablation catheter comprises handle, catheter main body, mesh skeleton, center-pole, a plurality of electrode;
Described mesh skeleton integral body is cylindrical shape, be fixedly installed in the anterior of described center-pole and be enclosed within the outside of described center-pole, described mesh skeleton is made of netted repetitive, described netted repetitive consists of described mesh skeleton along the axially-aligned of described center-pole, described netted repetitive comprises two elastic strips and the link that is used to connect adjacent described elastic strip, and described elastic strip is whole circular and have a bending of continuous repetition; Described electrode is arranged on described mesh skeleton;
The inside of described handle and catheter main body is set to hollow, is provided with in described handle and catheter main body for described electrode being electrically connected to the electrical connecting element of radio-frequency current generator;
Described center-pole is positioned at the inside of described handle and catheter main body; Described handle comprises the first slide unit and second slide unit of mutual socket, and the rear end of described catheter main body is installed on described the first slide unit, and the rear end of described center-pole is fixedly connected on described the second slide unit; Described the first slide unit, the second slide unit, center-pole are configured to make described mesh skeleton be incorporated into described catheter main body and stretch out described catheter main body by the mutual slip of described the first slide unit and the second slide unit.
Preferably, the handle main body that described the second slide unit grips for being used for user, described the first slide unit is socketed on the inside of the second slide unit.More preferably, described electrical connecting element comprises many connecting lines and adapter, and an end of described connecting line is electrically connected to respectively with described a plurality of electrodes, and the other end is electrically connected to described adapter; Described adapter is installed in described the second slide unit.
Preferably, the handle main body that described the first slide unit grips for being used for user, described the second slide unit is socketed on the inside of the first slide unit.More preferably, described electrical connecting element comprises many connecting lines and adapter, and an end of described connecting line is electrically connected to respectively with described a plurality of electrodes, and the other end is electrically connected to described adapter; Described adapter is installed in described the first slide unit.
Preferably, the material of described mesh skeleton is super-elastic shape memory alloy.More preferably, described super-elastic shape memory alloy is the NiTi marmem.Most preferably, described mesh skeleton is formed in one, and can adopt cutting or other processing mode to make.
Preferably, the number of described electrode is 2-10.
Compared with prior art, beneficial effect of the present invention is as follows:
A kind of multipole netted radio frequency ablation catheter provided by the present invention can melt a plurality of sites simultaneously, thereby greatly provide work efficiency.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand fully purpose of the present invention, feature and effect.
Description of drawings
Fig. 1 is the handle arrangement schematic diagram of the first embodiment of multipole netted radio frequency ablation catheter provided by the present invention.
Fig. 2 is the mesh skeleton structural representation partly of the first embodiment of multipole netted radio frequency ablation catheter provided by the present invention.
Fig. 3 is the structural representation of another kind of user mode of mesh skeleton part of the first embodiment of multipole netted radio frequency ablation catheter provided by the present invention.
Fig. 4 is the structural representation of the netted repetitive of mesh skeleton shown in Figure 2.
Fig. 5 is the handle arrangement schematic diagram of the second embodiment of multipole netted radio frequency ablation catheter provided by the present invention.
The specific embodiment
The present invention will be further described with specific embodiment by reference to the accompanying drawings in the below:
Embodiment 1
Fig. 1-Fig. 4 shows the first embodiment of multipole netted radio frequency ablation catheter provided by the present invention.As shown in Figures 1 to 4, the multipole netted radio frequency ablation catheter in the present embodiment comprises handle 1, catheter main body 2, mesh skeleton 3, center-pole 4, electrode 5.
As shown in Figure 1, the inside of handle 1 and catheter main body 2 is set to hollow, and inside is provided with for described electrode being electrically connected to the electrical connecting element (not shown) of radio-frequency current generator; Center-pole 4 is positioned at the inside of handle 1 and catheter main body 2; Handle 1 comprises the first slide unit 11 and second slide unit 12 of mutual socket, and the rear end of catheter main body 2 is installed on the first slide unit 11, and the rear end of center-pole 4 is fixedly connected on the second slide unit 12.
As Fig. 2-shown in Figure 4, mesh skeleton 3 integral body are cylindrical shape, are fixedly installed in the anterior of center-pole 4 and are enclosed within the outside of center-pole 4.Mesh skeleton 3 is made of netted repetitive 31, netted repetitive 30 consists of mesh skeleton 3 along the axially-aligned of center-pole 4, netted repetitive 30 comprises two elastic strips 31 and the link 32 that is used to connect adjacent elastic strip, and elastic strip 31 is whole circular and have a bending of continuous repetition.The front portion of center-pole 4 is provided with the first fixed block 6 and the second fixed block 7, mesh skeleton 3 by with the first fixed block 6 be connected the front portion that is fixedly installed in center-pole 4 being connected of fixed block 7.Electrode 5 is positioned on mesh skeleton 3.In this embodiment, the material of mesh skeleton is the NiTi marmem; Be formed in one, process by the mode of cutting.This configuration make with the axial vertical direction of center-pole 4 on, mesh skeleton 3 is expansible and shrink, and that is to say, the outer radius variable of mesh skeleton 3 is large and diminish.Here only for for example, when specifically implementing, can according to actual needs electrode be set on the mesh skeleton bar, as a plurality of electrodes can be set.
In this embodiment, the handle main body that the second slide unit 12 grips for being used for user, the first slide unit 11 is socketed on the inside of the second slide unit 12.When user gripping handle main body and when promoting the first slide unit 11 and moving forward or backward, due to the effect of center-pole 4, make mesh skeleton 3 can take in or stretch out catheter main body 2.Large and diminish due to the outer radius variable of mesh skeleton 3, when mesh skeleton 3 is not subjected to External Force Acting, for example mesh skeleton 3 stretch out catheter main body 2 and be not subjected to catheter main body 2 tube wall do the used time, mesh skeleton 3 is in expansion or the expansion state of nature, as shown in Figure 3.Under this state, the electrode 5 on mesh skeleton 3 can be near the site that needs in blood vessel to melt.When mesh skeleton 3 income catheter main body 2, whole mesh skeleton 3 is in by the contraction state of the tube wall of catheter main body 2 compression, as shown in Figure 2.Under this state, just can control radio frequency ablation catheter catheter main body 2 is moved in blood vessel.
In this specific embodiment, described radio-frequency (RF) ablation pipe also comprises the thermocouple (not shown), is connected with at least one electrode, is used for detecting temperature.Also be provided with in handle 1 and catheter main body 2 for the wire that transmits the thermocouple signal of telecommunication.
Need to prove, Fig. 1 to Fig. 4 only plays the effect of signal, the shape and size of the described multipole netted radio frequency ablation catheter of the present embodiment is not limited.
Fig. 5 shows the second embodiment of multipole netted radio frequency ablation catheter provided by the present invention.As shown in Figure 4, the multipole netted radio frequency ablation catheter in this specific embodiment and embodiment 1 difference are that the first slide unit 11 is that the second slide unit 12 is socketed on the inside of the first slide unit 11 for the handle main body of user gripping.In this embodiment, when user gripping handle main body and when promoting the second slide unit 12 and moving forward or backward, due to the effect of center-pole 4, make mesh skeleton 3 can take in or stretch out catheter main body 2.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all those skilled in the art all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (9)
1. a multipole netted radio frequency ablation catheter, is characterized in that, comprises handle, catheter main body, mesh skeleton, center-pole, a plurality of electrode;
Described mesh skeleton comprises the whole cylindrical shape that is, be fixedly installed in the anterior of described center-pole and be enclosed within the outside of described center-pole, described mesh skeleton is made of netted repetitive, described netted repetitive consists of described mesh skeleton along the axially-aligned of described center-pole, described netted repetitive comprises two elastic strips and the link that is used to connect adjacent described elastic strip, and described elastic strip is whole circular and have a bending of continuous repetition; Described electrode is arranged on described mesh skeleton;
The inside of described handle and catheter main body is set to hollow, is provided with in described handle and catheter main body for described electrode being electrically connected to the electrical connecting element of radio-frequency current generator;
Described center-pole is positioned at the inside of described handle and catheter main body; Described handle comprises the first slide unit and second slide unit of mutual socket, and the rear end of described catheter main body is installed on described the first slide unit, and the rear end of described center-pole is fixedly connected on described the second slide unit; Described the first slide unit, the second slide unit, center-pole are configured to make described mesh skeleton be incorporated into described catheter main body and stretch out described catheter main body by the mutual slip of described the first slide unit and the second slide unit.
2. multipole netted radio frequency ablation catheter according to claim 1, is characterized in that, the handle main body that described the second slide unit grips for being used for user, and described the first slide unit is socketed on the inside of the second slide unit.
3. multipole netted radio frequency ablation catheter according to claim 2, 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 respectively with described a plurality of electrodes, and the other end is electrically connected to described adapter; Described adapter is installed in described the second slide unit.
4. multipole netted radio frequency ablation catheter according to claim 1, is characterized in that, the handle main body that described the first slide unit grips for being used for user, and described the second slide unit is socketed on the inside of the first slide unit.
5. multipole netted radio frequency ablation catheter according to claim 4, 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 respectively with described a plurality of electrodes, and the other end is electrically connected to described adapter; Described adapter is installed in described the first slide unit.
6. multipole netted radio frequency ablation catheter according to claim 1, is characterized in that, the material of described mesh skeleton is super-elastic shape memory alloy.
7. multipole netted radio frequency ablation catheter according to claim 6, is characterized in that, described super-elastic shape memory alloy is the NiTi marmem.
8. multipole netted radio frequency ablation catheter according to claim 6, is characterized in that, described mesh skeleton is formed in one, and makes by the mode of cutting.
9. multipole netted radio frequency ablation catheter according to claim 1, is characterized in that, the number of described electrode is 2-10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310059442.9A CN103169537B (en) | 2013-02-26 | 2013-02-26 | The netted radio frequency ablation catheter of a kind of multipole |
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| CN201310059442.9A CN103169537B (en) | 2013-02-26 | 2013-02-26 | The netted radio frequency ablation catheter of a kind of multipole |
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| CN103169537A true CN103169537A (en) | 2013-06-26 |
| CN103169537B CN103169537B (en) | 2015-09-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104224315A (en) * | 2014-08-05 | 2014-12-24 | 上海魅丽纬叶医疗科技有限公司 | Radio frequency ablation catheter with reticulated pipe type support structure and radio frequency ablation device |
| WO2022171149A1 (en) * | 2021-02-09 | 2022-08-18 | 杭州德诺电生理医疗科技有限公司 | Ablation device |
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| CN102772246A (en) * | 2010-10-20 | 2012-11-14 | 美敦力阿迪安卢森堡有限责任公司 | Catheter apparatuses having expandable mesh structures for renal neuromodulation and associated systems and methods |
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| US6213995B1 (en) * | 1999-08-31 | 2001-04-10 | Phelps Dodge High Performance Conductors Of Sc And Ga, Inc. | Flexible tubing with braided signal transmission elements |
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| US6837886B2 (en) * | 2000-05-03 | 2005-01-04 | C.R. Bard, Inc. | Apparatus and methods for mapping and ablation in electrophysiology procedures |
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| Publication number | Publication date |
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| CN103169537B (en) | 2015-09-09 |
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