CN103565512A - Radiofrequency ablation catheter for renal arteries - Google Patents
Radiofrequency ablation catheter for renal arteries Download PDFInfo
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- CN103565512A CN103565512A CN201210262986.0A CN201210262986A CN103565512A CN 103565512 A CN103565512 A CN 103565512A CN 201210262986 A CN201210262986 A CN 201210262986A CN 103565512 A CN103565512 A CN 103565512A
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- renal artery
- ablation catheter
- radio frequency
- frequency ablation
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Abstract
The invention relates to the field of active medical device intervention, in particular to a radiofrequency ablation catheter for renal arteries. The radiofrequency ablation catheter for the renal arteries comprises an ablation electrode, a catheter body and a control handle; one end of the catheter body is Z-shaped and is connected with the ablation electrode; the control handle is connected to the other end of the catheter body; an electric connector is connected with an end of the control handle, and the control handle is connected with a radiofrequency ablation instrument for the renal arteries by the electric connector. The radiofrequency ablation catheter for the renal arteries has the advantages that the radiofrequency ablation catheter is simple in structure and convenient to operate, and renal sympathetic efferent nerves of a patient can be regulated, so that the blood pressure of the patient can be actively and effectively reduced, and clinical medical service requirements can be met.
Description
Technical field
The present invention relates to active medical apparatus and get involved field, relate to a kind of radio frequency ablation catheter for renal artery that is used for the treatment of intractable hypertension.
Background technology
Intractable hypertension refers to that the antihypertensive drugs (comprising diuretic) of having used more than three kinds or three kinds have also changed life style simultaneously, but blood pressure is still more than or equal to 140/90mmHg.Intractable hypertension is the modal cardiovascular diseases of middle-aged and elderly people, is also the important risk factor that causes coronary heart disease, apoplexy, congestive heart failure, renal failure, aortic aneurysm, is the first cause that middle-aged and elderly people is lethal, disable.Therefore, diagnose in time and prevent and treat intractable hypertension to improving middle-aged and elderly people quality of life and guaranteeing that good health and a long life are significant.
Along with China's life-time dilatation per capita.Senile hypertension prevalence has reached 40%～60%.Although current safe and effective medicine is more and more, hypertensive treatment present situation is still poor.The < < China cardiovascular diseases who announces for 2006 reports 2005)) data show, population of China hypertension awareness, treatment rate and control rate are only respectively 30.6%, 24.7%, 6.1% at present, and the hypertension prevention and control work of prompting China is also in reduced levels.Therefore the hypertensive timely and effective Shi Yige whole society for the treatment of needs the common problem of paying close attention to.Prevalence of Hypertension is in rising trend in the world in recent years. and together increase with the aged tendency of population increasing rapidly.According to U.S.'s prevention, detection, assessment and the treatment hypertension whole nation 2003 the 7th time report of joint committee (JNC7), there are hyperpietic 1,000,000,000 left and right in the current whole world.
Research shows: kidney sympathetic activity (renal sympathetic nerve activity, RSNA) causes renal tubules sodium water heavily to absorb increase, causes that renin release and renal vascular resistance change, thereby makes hypertension.And by kidney Sympathetic Primary Afferent Nerves, the reflected signal of kidney sensor is conducted to maincenter, then by kidney Sympathetic Nerve neuroregulation blood pressure.So RSNA can not only short-term regulate renal artery antiotasis to change, and is also the hypertensive key factor of long term maintenance.Therefore for obstinate hypertension, use radio frequency ablation catheter for renal artery to carry out that renal artery is orthosympathetic to be melted, the hypertensive new hope for the treatment of, also be a new method of non-hypertension therapy simultaneously, and show that according to the clinical trial in external early stage the method is safely and effectively, can be widely used, can make hyperpietic break away from the puzzlement of drug administration every day.
A kind of helical form ring renal artery sympathetic nerve frequency ablation electrode catheter is disclosed in prior art, although can melt renal artery, but its diameter is fixed, can not regulate, cannot guarantee that electrode follows renal artery blood vessel to recline, and without monitoring temperature measure, can not accurately control and melt temperature, cause degree of ablation not or ablation of excess causes renal artery vascular puncture affects health.
Summary of the invention
(1) technical problem that will solve
The object of this invention is to provide a kind of radio frequency ablation catheter for renal artery.
(2) technical scheme
To achieve these goals, the invention provides a kind of radio frequency ablation catheter for renal artery, comprising: ablating electrode, conduit pipe shaft and joystick;
One end of described conduit pipe shaft is zigzag shape, and its end connects ablating electrode; Its other end connects joystick;
The end electrical connectors of described joystick, connects renal artery radiofrequency ablation instrument by electric connector.
Further, described conduit pipe shaft is comprised of skin, intermediate layer and inner conductor, described skin and inner conductor adopt fluorine class, polyurethanes, polyimide or medical macromolecular materials to make, described intermediate layer conduit is made by woven wire cloth, by extrusion process by three layers of conduits join together.
Further, described tinsel material is medical stainless steel, and diameter is 0.01mm-0.5mm.
Further, described ablating electrode inside is hollow structure, is provided with temperature sensor and wire in described hollow structure, and described temperature sensor and wire are connected on electric connector.
Further, described conductor material is the enamel-covered wire of silver, NiTi, copper or copper alloy, and external diameter is 0.15 ± 0.1mm.
Further, described ablating electrode connects draught line, and described traction fiber material is NiTi or rustless steel, and diameter is 0.1mm-1mm.
Further, described zigzag conduit pipe shaft end adopts soft medical macromolecular materials to make.
Further, the material of described joystick is polyethylene, polyesters, polypropylene type or polyformaldehyde.
Further, the material of described ablating electrode is gold, platinum, platinum alloy or medical stainless steel.
Further, described ablating electrode diameter is 0.67mm-2.67mm, and length is 1mm-3mm.
(3) beneficial effect
Radio frequency ablation catheter for renal artery provided by the invention, tool has the following advantages:
(1) the special Z-type bending of distal end of catheter, in operation process, by the control of handle, ablating electrode is flattened in renal artery blood vessel wall, soft section of soft medical macromolecular materials of employing of far-end, avoid occurring in operation process that perforation or ablating electrode are unsettled, affect ablation effect.The temperature sensor that inlay ablating electrode inside adopts high-precision critesistor or thermocouple, by connecting high-precision temperature monitoring apparatus, the temperature in operation process is monitored.
(2) Design of Mechanical Structure of conduit and handle handling make conduit have crooked motility and the accuracy regulating, and make user be regulated ablating electrode is accurately delivered to target location by joystick.What the three-decker of conduit pipe shaft made that distal end of catheter has a 1:1 turns round control performance, makes ablating electrode can arrive rapidly and accurately target site.
(3) renal artery radiofrequency catheter is connected with renal artery radiofrequency ablation instrument by connection cord, the energy (4W-20W) of radiofrequency melting instrument output is sent to target location, target location is melted and cut off renal artery sympathetic nerve, and the time of melting need to be set as 1s-15min according to clinical.When operation, according to clinical demand, melt 1-10 point, by regulating kidney Sympathetic Nerve nerve to reduce blood pressure, so radio frequency ablation catheter for renal artery of the present invention meets medical science instructions for use.
Accompanying drawing explanation
Fig. 1 is the structural representation schematic diagram of embodiment of the present invention radio frequency ablation catheter for renal artery;
Fig. 2 is ablating electrode structural representation in embodiment of the present invention radio frequency ablation catheter for renal artery.
Wherein: 1, ablating electrode; 2, conduit pipe shaft; 3, joystick; 4: electric connector.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, the embodiment of the present invention provides a kind of radio frequency ablation catheter for renal artery, mainly comprises ablating electrode 1, conduit pipe shaft 2 and joystick 3.One end of conduit pipe shaft 2 is zigzag shape, and its end connects ablating electrode 1; Its other end connects joystick 3;
The end electrical connectors 4 of joystick 3, connects renal artery radiofrequency ablation instrument by electric connector 4.
Wherein, the material of ablating electrode 1 is the materials such as gold, platinum, platinum alloy or medical stainless steel, and electrode diameter is 0.67mm, 1.67 or 2.67mm, and length is 1mm, 2mm or 3mm; Ablating electrode inner hollow, internal diameter is 0.5mm, 1.0mm, 1.5mm or 1.67mm, hollow part will be used for mounting temperature sensor and welding lead, with reference to figure 2.
High-precision thermoelectricity is occasionally bonded in to ablating electrode 1 inner hollow position with medical glue in thermistor temperature sensor temperature-sensitive position; Conductor material is the enamel-covered wire of silver, NiTi, copper or copper alloy, and external diameter is 0.15 ± 0.1mm, and the enamel-covered wire that intercepted length is 150cm is welded on enamel-covered wire on ablating electrode with lead-free soldering wire; The long traction fiber of intercepting 1.5m, traction fiber material is NiTi or rustless steel, diameter is 0.1mm-1mm, and traction fiber is welded on ablating electrode.
Conduit pipe shaft 2 materials are fluorine class, polyurethanes, the medical macromolecular materials such as polyimide and modified body, external diameter is 2F, 3F, 4F, 5F, pipe shaft wall thickness is 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm or 3mm: conduit pipe shaft 2 is divided into three layers, outer, inner conductor material adopts fluorine class, polyurethanes, the medical macromolecular materials such as polyimide and modified body are made, intermediate layer is woven wire cloth, wherein, tinsel material is medical stainless steel, diameter is 0.01mm-0.5mm, by extrusion process, trilaminate material is combined, the conduit pipe shaft 2 soft ends of far-end are divided into soft medical macromolecular materials, and without woven wire cloth, guarantee in use not damage renal artery blood vessel, the soft end of far-end and conduit pipe shaft 2 main bodys adopt heat fusion or medical glue to bond together, and it is the medium-hard medical macromolecular materials of 3-5cm that soft end and fusion place of conduit pipe shaft have length.
Joystick 3 materials are the medical plastics such as polyethylene, polyesters, polypropylene type, polyformaldehyde, and metalwork material is medical 304,316 rustless steels.
Wire on the ablating electrode of handling well 1, traction fiber, temperature sensor are penetrated to conduit pipe shaft 2, and ablating electrode 1 and conduit pipe shaft 2 adopt medical glue to bond together; Traction fiber is put on the rustless steel bearing pin of joystick 3 inside fixingly, conduit pipe shaft 2 is bonding firm with medical glue with the rotation position of joystick 3; Wire and temperature sensor are welded on the position that electric connector is corresponding, install electric connector 4 and be screwed.
The radio frequency ablation catheter for renal artery tool that the embodiment of the present invention provides has the following advantages:
(1) excellent adhibition and temperature-control performance
The Z-type bending that distal end of catheter is special, in operation process, by the control of handle, ablating electrode is flattened in renal artery blood vessel wall, soft section of soft medical macromolecular materials of employing of far-end, avoid occurring in operation process that perforation or ablating electrode are unsettled, affect ablation effect.The temperature sensor that inlay ablating electrode inside adopts high-precision critesistor or thermocouple, by connecting high-precision temperature monitoring apparatus, the temperature in operation process is monitored.
(2) handling and turn round control
The Design of Mechanical Structure of conduit and handle handling make conduit have crooked motility and the accuracy regulating, and make user be regulated ablating electrode is accurately delivered to target location by joystick.What the three-decker of conduit pipe shaft made that distal end of catheter has a 1:1 turns round control performance, makes ablating electrode can arrive rapidly and accurately target site.
(3) use safety, meet clinical needs
Renal artery radiofrequency catheter is connected with renal artery radiofrequency ablation instrument by connection cord, the energy (4W-20W) of radiofrequency melting instrument output is sent to target location, target location is melted and cut off renal artery sympathetic nerve, and the time of melting need to be set as 1s-15min according to clinical.When operation, according to clinical demand, melt 1-10 point, by regulating kidney Sympathetic Nerve nerve to reduce blood pressure, so radio frequency ablation catheter for renal artery of the present invention meets medical science instructions for use.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment with various modifications that the present invention's design is suitable for special-purpose.
Claims (10)
1. a radio frequency ablation catheter for renal artery, is characterized in that, comprising:
Ablating electrode, conduit pipe shaft and joystick;
One end of described conduit pipe shaft is zigzag shape, and its end connects ablating electrode; Its other end connects joystick;
The end electrical connectors of described joystick, connects renal artery radiofrequency ablation instrument by electric connector.
2. radio frequency ablation catheter for renal artery as claimed in claim 1, it is characterized in that, described conduit pipe shaft is comprised of skin, intermediate layer and inner conductor, described skin and inner conductor adopt fluorine class, polyurethanes, polyimide or medical macromolecular materials to make, described intermediate layer conduit is made by woven wire cloth, by extrusion process by three layers of conduits join together.
3. radio frequency ablation catheter for renal artery as claimed in claim 2, is characterized in that, described tinsel material is medical stainless steel, and diameter is 0.01mm-0.5mm.
4. radio frequency ablation catheter for renal artery as claimed in claim 1, is characterized in that, described ablating electrode inside is hollow structure, is provided with temperature sensor and wire in described hollow structure, and described temperature sensor and wire are connected on electric connector.
5. radio frequency ablation catheter for renal artery as claimed in claim 4, is characterized in that, described conductor material is the enamel-covered wire of silver, NiTi, copper or copper alloy, and external diameter is 0.15 ± 0.1mm.
6. radio frequency ablation catheter for renal artery as claimed in claim 4, is characterized in that, described ablating electrode connects draught line, and described traction fiber material is NiTi or rustless steel, and diameter is 0.1mm-1mm.
7. radio frequency ablation catheter for renal artery as claimed in claim 1, is characterized in that, described zigzag conduit pipe shaft end adopts soft medical macromolecular materials to make.
8. radio frequency ablation catheter for renal artery as claimed in claim 1, is characterized in that, the material of described joystick is polyethylene, polyesters, polypropylene type or polyformaldehyde.
9. radio frequency ablation catheter for renal artery as claimed in claim 1, is characterized in that, the material of described ablating electrode is gold, platinum, platinum alloy or medical stainless steel.
10. radio frequency ablation catheter for renal artery as claimed in claim 9, is characterized in that, described ablating electrode diameter is 0.67mm-2.67mm, and length is 1mm-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210262986.0A CN103565512A (en) | 2012-07-26 | 2012-07-26 | Radiofrequency ablation catheter for renal arteries |
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| CN201210262986.0A CN103565512A (en) | 2012-07-26 | 2012-07-26 | Radiofrequency ablation catheter for renal arteries |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110353795A (en) * | 2018-04-09 | 2019-10-22 | 乐普（北京）医疗器械股份有限公司 | A kind of multi-pole rf ablation catheter for treating resistant hypertension |
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| CN202044343U (en) * | 2011-04-15 | 2011-11-23 | 深圳市惠泰医疗器械有限公司 | Radio frequency ablation catheter for renal artery |
| CN102274074A (en) * | 2011-05-03 | 2011-12-14 | 上海微创电生理医疗科技有限公司 | Multi-electrode open-type radio frequency ablation catheter |
| CN102274075A (en) * | 2011-05-03 | 2011-12-14 | 上海微创电生理医疗科技有限公司 | Multipolar punctiform electrode catheter for heat-induced kidney neuroregulation |
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- 2012-07-26 CN CN201210262986.0A patent/CN103565512A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2889337Y (en) * | 2006-02-16 | 2007-04-18 | 微创医疗器械(上海)有限公司 | Microtube |
| CN200954136Y (en) * | 2006-10-19 | 2007-10-03 | 成正辉 | Rail radiofrequency melting catheter device |
| CN101411645A (en) * | 2007-10-19 | 2009-04-22 | 上海导向医疗系统有限公司 | The uniform radio-frequency ablation electrode of surface temperature |
| CN101579257A (en) * | 2008-05-15 | 2009-11-18 | 全明基 | Electrode for radiofrequency tissue |
| WO2011025647A1 (en) * | 2009-08-25 | 2011-03-03 | Medtronic Ablation Frontiers Llc | Bi-modal catheter steering mechanism |
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| CN202044343U (en) * | 2011-04-15 | 2011-11-23 | 深圳市惠泰医疗器械有限公司 | Radio frequency ablation catheter for renal artery |
| CN102274074A (en) * | 2011-05-03 | 2011-12-14 | 上海微创电生理医疗科技有限公司 | Multi-electrode open-type radio frequency ablation catheter |
| CN102274075A (en) * | 2011-05-03 | 2011-12-14 | 上海微创电生理医疗科技有限公司 | Multipolar punctiform electrode catheter for heat-induced kidney neuroregulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110353795A (en) * | 2018-04-09 | 2019-10-22 | 乐普（北京）医疗器械股份有限公司 | A kind of multi-pole rf ablation catheter for treating resistant hypertension |
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Application publication date: 20140212 |