CN102784006B - Be used for the treatment of hypertensive radio-frequency ablation electrode - Google Patents
Be used for the treatment of hypertensive radio-frequency ablation electrode Download PDFInfo
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- CN102784006B CN102784006B CN201210302544.4A CN201210302544A CN102784006B CN 102784006 B CN102784006 B CN 102784006B CN 201210302544 A CN201210302544 A CN 201210302544A CN 102784006 B CN102784006 B CN 102784006B
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Abstract
The invention provides a kind of radio-frequency ablation electrode, especially one is used for the treatment of hypertensive radio-frequency ablation electrode, to solve the problem of the heat loss that blood vessel wall is easily produced by electrode, this radio-frequency ablation electrode comprises hands handle, trocar sheath, flexible support and electrode, one end of trocar sheath is arranged in the handle, electrode is fixed on flexible support, handle is provided with water injection hole, the liquid injected by water injection hole flows into blood vessel by hydraulic pipeline, liquid is the low-temperature mixed liquid of normal saline and anticoagulant, when carrying out point to blood vessel and melting, low-temperature mixed liquid is for reducing the temperature of non-treated area blood vessel wall.The present invention adopts the mode injecting low-temperature mixed liquid in blood vessel, and reduce rapidly the temperature of Peripheral blood tube wall, the heat avoiding electrode to produce causes damage to arteriorenal blood vessel wall, to reach the hypertensive object for the treatment of; In addition, flexible support, under the effect of low-temperature mixed liquid, also can be avoided because its overtension causes damage to blood vessel wall.
Description
Technical field
The present invention relates to a kind of medical machinery, particularly a kind of radio-frequency ablation electrode, especially one is used for the treatment of hypertensive radio-frequency ablation electrode.
Background technology
Be December in 2011 14 days at authorized announcement date, Authorization Notice No. is in the Chinese patent of CN202069688U, disclose a kind of radio-frequency ablation electrode for the treatment of intractable hypertension, this radio-frequency ablation electrode comprises electrode tip, flexible support, sleeve pipe, conduit and joystick, electrode tip is fixed on flexible support, flexible support has elasticity, and it is wrapped in sleeve pipe in the mode of shrinking; Joystick controls to melt the time, and electrode tip is arranged on the maximum cross section after flexible support expansion.Use procedure is under the guiding of B ultrasonic or CT image documentation equipment, and femoral artery puncture inserts treatment conduit, and after being advanced into renal artery far-end, support and electrode tip are deviate from from sleeve pipe, release energy in point of care, carry out radio-frequency (RF) ablation, to reach therapeutic purposes.Over the course for the treatment of, the temperature of electrode tip controls between 40 DEG C ~ 75 DEG C.
But because the temperature discharged in electrode tip is too much, arteriorenal blood vessel wall can cause damage to it, for patient causes new injury under the effect of high-temperature heat.Therefore, be badly in need of a while carrying out ablation process by electrode pair point of care, also can not cause the radio-frequency ablation electrode of damage to arteriorenal blood vessel wall.
Summary of the invention
For the weak point of above-mentioned technology, the invention provides a kind of adopt the mode of water filling with the heat loss avoided blood vessel wall and produced by electrode be used for the treatment of hypertensive radio-frequency ablation electrode.
For achieving the above object, the invention provides one and be used for the treatment of hypertensive radio-frequency ablation electrode, comprise hands handle, trocar sheath, flexible support and electrode, one end of described trocar sheath is arranged in described handle, described electrode is fixed on described flexible support, connected temperature detecting resistance is also provided with at the end of described flexible support, described handle is provided with water injection hole, the liquid injected by described water injection hole flows into blood vessel by hydraulic pipeline, described liquid is the low-temperature mixed liquid that normal saline and anticoagulant are made, when carrying out point to blood vessel wall and melting, low-temperature mixed liquid is for reducing the temperature of Peripheral blood tube wall.
Wherein, the temperature of described normal saline is 0 DEG C.
Wherein, in described trocar sheath, be provided with the inner sleeve be wrapped in outside temperature measuring wire and radio-frequency electrode wire, the outer wall of described inner sleeve is also enclosed with protecting film.
Wherein, described hydraulic pipeline is made up of water injection pipe and the described trocar sheath that is communicated with it, the end of described water injection pipe is communicated with described water injection hole, the front end of described water injection pipe extends in described trocar sheath, low-temperature mixed liquid flows to described trocar sheath through described water injection pipe, and is exported in inflow blood vessel by the front end of described trocar sheath.
Wherein, the tube wall of described trocar sheath front end is also provided with multiple apopore.
Wherein, described hydraulic pipeline is made up of water injection pipe and the water sink that is communicated with it, the front end of described water injection pipe extends to the inside of described water sink, the outer wall of described water sink is provided with multiple apopore, low-temperature mixed liquid flows in described water sink through described water injection pipe, and is exported in inflow blood vessel by multiple described apopore.
Wherein, described flexible support adopts memorial alloy to make; described flexible support is enclosed with protecting film; after described flexible support launches can be soft under the effect of low-temperature mixed liquid be fitted in blood vessel wall; and can not produce pressure to blood vessel wall, the maximum cross section diameter after its expansion is 7mm.
Wherein, described handle is also provided with pusher, described pusher pushes to the outside of described trocar sheath for controlling described flexible support and described temperature detecting resistance or described flexible support, described temperature detecting resistance and described water sink by the inside of described trocar sheath.
Wherein, described flexible support is long bird-caging structure, is also provided with positioning head in the front end of described flexible support, is coated with reflective membrane at described positioning head.
Wherein, described flexible support is flared structure, is provided with annulus in the front end of described flexible support, and described annulus is played a supporting role to the flexible support after expansion.
Compared with prior art, the present invention has the following advantages:
1, the present invention adopts to the mode of water filling in blood vessel, while making electrode pair point of care carry out ablation process, also can not cause damage to arteriorenal blood vessel wall, thus reaches the hypertensive object for the treatment of, have easy and simple to handle, use the features such as flexible;
2, the liquid injected by water injection hole flows into blood vessel by hydraulic pipeline, therefore, when carrying out point to blood vessel wall and melting, the low-temperature mixed liquid of normal saline and anticoagulant can be injected blood vessel, the temperature of Peripheral blood tube wall can be reduced, avoid the heat loss that blood vessel wall is produced by electrode, in addition, the blood in blood vessel can also be diluted by anticoagulant low-temperature mixed liquid, prevent localized hyperthermia from bringing out thrombosis.
3, the flexible support be made up of memorial alloy is under the effect of low-temperature mixed liquid, its diameter launching rear cross section is only 7mm, flexible support can not be made to produce excessive tension force, it can be made to be fitted on blood vessel in soft mode, to avoid the overtension due to flexible support to cause damage to blood vessel wall; In addition, flexible support is also convenient to be recycled in trocar sheath under the effect of low-temperature mixed liquid;
4, owing to being coated with visible reflective membrane under CT or DSA at positioning head, therefore, its position in arteries is convenient to observe on screen.
Accompanying drawing explanation
Fig. 1 is the sectional view of first embodiment of the invention;
Fig. 2 is the sectional view of second embodiment of the invention;
Fig. 3 is the sectional view of third embodiment of the invention.
Primary symbols is described as follows:
1-handle 2-pusher 3-trocar sheath
4-inner sleeve 5-flexible support 6-electrode
7-temperature detecting resistance 8-water injection hole 9-apopore
10-thermometric socket 11-radio-frequency electrode socket
12-water sink 13-temperature measuring wire 14-radio-frequency electrode wire
15-positioning head 16-annulus 17-water filling sealing gasket
18-water-injecting cavity 19-fetters pipe 20-water injection pipe
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, the invention provides one and be used for the treatment of hypertensive radio-frequency ablation electrode, comprise handle 1, trocar sheath 3, flexible support 5 and electrode 6.Handle 1 is also provided with pusher 2, and flexible support 5 and temperature detecting resistance 7 are pushed to the outside of trocar sheath 3 by the inside of trocar sheath 3 by this pusher 2, make in its intravasation.Handle being also provided with scale marker, by watching scale marker, thus learning the length in flexible support intravasation.Handle is also provided with water filling sealing gasket.The end of trocar sheath 3 is arranged on the inside of handle 1, and its front end is arranged on the outside of handle.Flexible support 4 is arranged on the front end of trocar sheath 3, and electrode 6 is arranged on flexible support 5.Flexible support 5 adopts the memorial alloy with elastic effect to make, and flexible support is enclosed with protecting film.But, flexible support 5 with the contact surface of electrode 6 do not wrap up protecting film, therefore, are effective in and radio-frequency current is sent in electrode.Also be provided with positioning head 15 in the front end of flexible support 5, be coated with reflective membrane at positioning head 15, be convenient to observe its position in arteries on CT or DSA by reflective membrane.When flexible support does not extend to the outside of trocar sheath, this flexible support adopts contraction mode to be wrapped in trocar sheath; When flexible support extends to the outside of trocar sheath, and time in intravasation, flexible support can Automatic-expanding be long lantern shape under the effect of blood vessel temperature, and is fitted on blood vessel.
Electrode 6 can be on flexible support 5 varying cross-section.Electrode 6 is connected with the radio-frequency electrode wire 14 in trocar sheath 3 through flexible support 5, and the other end of radio-frequency electrode wire 14 is connected with the radio-frequency electrode socket 11 being arranged on handle 1 end, and radio-frequency electrode socket is connected with outside radio-frequency electrode generator.In ablation procedure, electrode can produce the temperature of 60 DEG C.
Also be provided with connected temperature detecting resistance 7 at the end of flexible support 5, this temperature detecting resistance is critesistor.Temperature detecting resistance 7 is connected with the temperature measuring wire 13 in trocar sheath 3, and temperature detecting resistance is used for the temperature of detecting electrode in ablation procedure.The other end of temperature measuring wire 13 is connected with the thermometric socket 10 being arranged on handle 1 end.
Temperature measuring wire 13 and radio-frequency electrode wire 14 are arranged in the inner sleeve 4 of trocar sheath 3 inside, and the outer wall of inner sleeve is also enclosed with protecting film, and the front end of inner sleeve extends to the outside of trocar sheath front end.
The liquid injected by water injection hole 8 flows into blood vessel by hydraulic pipeline, this hydraulic pipeline is made up of water injection pipe 20 and the trocar sheath 3 that is communicated with it, the end of water injection pipe 20 is communicated with water injection hole 8, the front end of water injection pipe 20 extends to trocar sheath 3, low-temperature mixed liquid flows to trocar sheath through water injection pipe, after low-temperature mixed liquid stream enters trocar sheath, make to form water-injecting cavity in trocar sheath, low-temperature mixed liquid is exported by the water side of trocar sheath front end and flows in blood vessel.The liquid injected by water injection hole is low-temperature mixed liquid prepared by normal saline and anticoagulant, and normal saline is identical with the mixed proportion of current clinical employing with the mixed proportion of anticoagulant.After flexible support intravasation, because the temperature in blood vessel is higher than 36 DEG C, therefore, the flexible support meeting Automatic-expanding adopting memorial alloy to make, plays a supporting role to blood vessel wall.In ablation procedure, low-temperature mixed liquid is injected blood vessel, flexible support is under the effect of low-temperature mixed liquid, the tension force that it is excessive can be reduced, the diameter of its cross section is reduced to 7mm rapidly, make it be fitted on blood vessel in soft mode, excessive pressure can not be produced to blood vessel wall, avoid the overtension due to flexible support to cause damage to blood vessel wall.In addition, flexible support is also convenient to be recycled in trocar sheath under the effect of low-temperature mixed liquid.The temperature of normal saline is set as 0 DEG C, the low-temperature mixed liquid of normal saline and anticoagulant is injected blood vessel, the temperature of blood vessel wall can be reduced fast, avoid the heat loss that blood vessel wall is produced by electrode.In addition, the blood in blood vessel can also be diluted by low-temperature anticoagulant mixed liquor, prevent localized hyperthermia from bringing out thrombosis.
Entering flow in blood vessel to improve low-temperature mixed liquid stream, can also also be provided with multiple apopore 9 on the tube wall of trocar sheath front end.By the low-temperature mixed liquid flowed out in apopore 9 with the common intravasation of water flowed out by trocar sheath front end.
In addition, be also provided with constraint pipe 19 in handle 1, constraint pipe is arranged on the rear side of trocar sheath, for water injection pipe and interior pipe box being wrapped up therein, making water injection pipe and interior pipe box that parallel mode can be adopted to arrange, and extending in a horizontal manner in trocar sheath.
As shown in Figure 2, the liquid injected by water injection hole 8 flows into blood vessel by hydraulic pipeline, this hydraulic pipeline is made up of water injection pipe 20 and the water sink 12 that is communicated with it, the end of water injection pipe 20 is communicated with water injection hole 8, the front end of water injection pipe 20 extends to the inside of water sink 12, the outer wall of water sink 12 is provided with multiple apopore (not shown), and low-temperature mixed liquid flows in water sink through water injection pipe, and is exported by multiple apopore and flow in blood vessel.
The front end of inner sleeve is passed trocar sheath front end and adopts horizontal mode to extend to the outside of water sink front end face.
Flexible support, temperature detecting resistance and water sink are pushed to the outside of trocar sheath by pusher by the inside of trocar sheath.Most water sink pushes in blood vessel by pusher, is retained in trocar sheath by the end of water sink, and the total length in flexible support, temperature detecting resistance and water sink intravasation is 10mm.Adopt this kind of design, can be back in water sink in the effect of pressure by the blood in anti-hemostatic tube.
Because the structure of the structure of other assemblies in embodiment 2, position relationship and annexation and associated component in embodiment 1, position relationship and annexation are identical, therefore, generally do not repeat in example 2.
As shown in Figure 3, in embodiment 3, be flared structure after this flexible support 5 launches, be provided with annulus 16 in the front end of flexible support 5, this annulus 16 is played a supporting role to the flexible support 5 after expansion.Because the structure of the structure of other assemblies in embodiment 3, position relationship and annexation and associated component in embodiment 1 or embodiment 2, position relationship and annexation are identical, therefore, generally do not repeat in example 2.
In the radio-frequency ablation electrode that embodiment 1, embodiment 2 and embodiment 3 describe, carry out temperature control to it, water injection rate and the control of the time of melting of electrode is all that external equipment by being connected with handle completes, handle does not control temperature, water injection rate and the time of melting.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. one kind is used for the treatment of hypertensive radio-frequency ablation electrode, comprise hands handle, trocar sheath, flexible support and electrode, one end of described trocar sheath is arranged in described handle, described electrode is fixed on described flexible support, connected temperature detecting resistance is also provided with at the end of described flexible support, it is characterized in that, described handle is provided with water injection hole, the liquid injected by described water injection hole flows into blood vessel by hydraulic pipeline, described liquid is be the low-temperature mixed liquid that the normal saline of 0 DEG C and anticoagulant are made by temperature, when carrying out point to blood vessel wall and melting, low-temperature mixed liquid is for reducing the temperature of Peripheral blood tube wall,
Also be provided with constraint pipe in the handle, constraint pipe is arranged on the rear side of trocar sheath;
In described trocar sheath, be provided with the inner sleeve be wrapped in outside temperature measuring wire and radio-frequency electrode wire, the outer wall of described inner sleeve is also enclosed with protecting film;
Described hydraulic pipeline is made up of water injection pipe and the water sink that is communicated with it, the front end of described water injection pipe extends to the inside of described water sink, the outer wall of described water sink is provided with multiple apopore, low-temperature mixed liquid flows in described water sink through described water injection pipe, and exports in inflow blood vessel by multiple described apopore;
Described flexible support adopts memorial alloy to make, described flexible support is enclosed with protecting film, described flexible support can be soft under the effect of low-temperature mixed liquid after launching be fitted in blood vessel wall, and pressure can not be produced to blood vessel wall, its launch after maximum cross section diameter be 7mm, the contact surface of flexible support and electrode does not wrap up protecting film;
Described handle is also provided with pusher, described pusher pushes to the outside of described trocar sheath for controlling described flexible support and described temperature detecting resistance or described flexible support, described temperature detecting resistance and described water sink by the inside of described trocar sheath, wherein, most water sink pushes in blood vessel by pusher, be retained in trocar sheath by the end of water sink, the total length in flexible support, temperature detecting resistance and water sink intravasation is 10mm.
2. be according to claim 1ly used for the treatment of hypertensive radio-frequency ablation electrode, it is characterized in that, described flexible support is long bird-caging structure, is also provided with positioning head in the front end of described flexible support, is coated with visible reflective membrane on CT or DSA at described positioning head.
3. be according to claim 1ly used for the treatment of hypertensive radio-frequency ablation electrode, it is characterized in that, described flexible support is flared structure, is provided with annulus in the front end of described flexible support, and described annulus is played a supporting role to the flexible support after launching.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210302544.4A CN102784006B (en) | 2012-08-24 | 2012-08-24 | Be used for the treatment of hypertensive radio-frequency ablation electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210302544.4A CN102784006B (en) | 2012-08-24 | 2012-08-24 | Be used for the treatment of hypertensive radio-frequency ablation electrode |
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| CN102784006A CN102784006A (en) | 2012-11-21 |
| CN102784006B true CN102784006B (en) | 2015-11-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104287827B (en) * | 2013-07-19 | 2018-03-02 | 卡尔迪雅（天津）医疗器械有限公司 | One kind removes renal sympathetic nerve radio-frequency ablation electrode and radio frequency ablation system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587975A (en) * | 1984-07-02 | 1986-05-13 | Cardiac Pacemakers, Inc. | Dimension sensitive angioplasty catheter |
| US6036689A (en) * | 1998-09-24 | 2000-03-14 | Tu; Lily Chen | Ablation device for treating atherosclerotic tissues |
| CN1278711A (en) * | 1997-09-11 | 2001-01-03 | 维纳斯医学技术公司 | Expandable vein ligator catheter and method of use |
| CN101084038A (en) * | 2004-10-05 | 2007-12-05 | 阿迪安公司 | Methods and apparatus for renal neuromodulation |
| CN202069688U (en) * | 2011-03-11 | 2011-12-14 | 北京天助畅运医疗技术股份有限公司 | Radio frequency ablation electrode capable of treating resistant hypertension |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2438877B1 (en) * | 2005-03-28 | 2016-02-17 | Vessix Vascular, Inc. | Intraluminal electrical tissue characterization and tuned RF energy for selective treatment of atheroma and other target tissues |
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- 2012-08-24 CN CN201210302544.4A patent/CN102784006B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587975A (en) * | 1984-07-02 | 1986-05-13 | Cardiac Pacemakers, Inc. | Dimension sensitive angioplasty catheter |
| CN1278711A (en) * | 1997-09-11 | 2001-01-03 | 维纳斯医学技术公司 | Expandable vein ligator catheter and method of use |
| US6036689A (en) * | 1998-09-24 | 2000-03-14 | Tu; Lily Chen | Ablation device for treating atherosclerotic tissues |
| CN101084038A (en) * | 2004-10-05 | 2007-12-05 | 阿迪安公司 | Methods and apparatus for renal neuromodulation |
| CN202069688U (en) * | 2011-03-11 | 2011-12-14 | 北京天助畅运医疗技术股份有限公司 | Radio frequency ablation electrode capable of treating resistant hypertension |
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