CN205433879U - Radiofrequency ablation catheter for renal arteries - Google Patents
Radiofrequency ablation catheter for renal arteries Download PDFInfo
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- CN205433879U CN205433879U CN201521014726.7U CN201521014726U CN205433879U CN 205433879 U CN205433879 U CN 205433879U CN 201521014726 U CN201521014726 U CN 201521014726U CN 205433879 U CN205433879 U CN 205433879U
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Abstract
The utility model discloses a radiofrequency ablation catheter for renal arteries, including being used for adjusting nervous adjusting part, the adjusting part includes the electrode and is used for bearing the load -bearing part of electrode, electrode are used for regulation energy transfer to nerve, and electrode package draws together the wire electrode of winding on load -bearing part, and load -bearing part has the first shape and second shape, and under the first shape, the adjusting part is set up to be removed in the blood vessel for being suitable for, under the second shape, the electrode is in and is fit for adjusting energy transfer to nervous position. Compared with the prior art, the length that the electrode extends on load -bearing part is longer, and this makes the utility model discloses a radiofrequency ablation catheter for renal arteries has the better effect that melts.
Description
Technical field
This utility model relates to electrosurgery, particularly relates to a kind of radio frequency ablation catheter for renal artery.
Background technology
Intractable hypertension, i.e. use 3 kinds or above medicine (having used a diuretic) the most unmanageable hypertension (sBP >=160mmHg), the most more typically, its paathogenic factor is numerous, pathogenesis is indefinite, medication effect is very poor, and diagnosis and treatment technology are the most not mature enough, one of great difficult problem becoming hypertension therapeutic.
Up-to-date animal and clinical laboratory data prove the regulation (such as removing sympathetic nerve) of renal nerve can be lowered renal artery radiofrequency ablation art that intractable hypertension, such as latest developments go out the most enduringly.Renal artery radiofrequency ablation art is a kind of by by specific part in electrode catheter intravascular feeding renal artery, and release radio-frequency current causes renal artery sympathetic nerve local solidification downright bad, reaches denervated interventional techniques.Radio-frequency current damage range is little, does not results in body harm, and therefore, renal artery radiofrequency ablation art has become as a kind of effective removal orthosympathetic method of renal artery.At present, occurred in that single-stage radio frequency ablation catheter for renal artery is to implement renal artery radiofrequency ablation operation.The head of single-stage radio frequency ablation catheter for renal artery has single electrode, renal artery sympathetic nerve can be carried out One-Point Location and melt, and owing to a some position can only be melted by once-through operation, therefore work efficiency is relatively low.
It addition, the regulation to renal nerve is proved to that the multiple disease relevant to kidney is had certain effect, the relevant disease that particularly renal sympathetic nerve overactivity causes.Such as, congestive heart failure (CHF) can cause abnormal high renal sympathetic nerve activation, thus causes water and the minimizing of sodium removed from health, and increases the secretion of feritin.The renin secretion increased causes Renal vascular to shrink, and causes the reduction of renal blood flow.Thus, kidney can make the spiral of heart failure condition decline prolongation for the reaction of heart failure.
Although having been reported that for regulating the orthosympathetic related equipment of renal artery in pertinent literature or patent, but current existing apparatus has the defects such as operation inconvenience, cost of manufacture height or inefficiency.
In consideration of it, this utility model provides a kind of radio frequency ablation catheter for renal artery.
Utility model content
Because the drawbacks described above of prior art, technical problem to be solved in the utility model is to provide one and operates radio frequency ablation catheter for renal artery easily.
For achieving the above object, this utility model provides a kind of radio frequency ablation catheter for renal artery, including the adjusting part for regulating nerve, it is characterized in that, described adjusting part includes electrode and for carrying the load bearing component of described electrode, described electrode is for being delivered to described nerve by regulation energy, described electrode includes the wire electrode being wrapped on described load bearing component, described load bearing component has the first shape and the second shape, under described first shape, described adjusting part is arranged to be suitable to move in the blood vessel；Under described second shape, described electrode is in the position being suitable for that described regulation energy is delivered to described nerve.
Further, described electrode extends on described load bearing component, making described electrode have the 4th shape and the 5th shape, the 4th shape of described electrode adapts with the first shape of described load bearing component, and the 5th shape of described electrode adapts with the second shape of described load bearing component.
Further, described electrode is made on described load bearing component by coil winding machine or manual wound around by described wire electrode.
Further, a diameter of the 0.05～0.25mm of described wire electrode.Further, glue is utilized to be adhered on described load bearing component at the two ends of described wire electrode, so that described wire electrode is fixed on described load bearing component.
Further, described glue is that UV solidifies glue or epoxide-resin glue or other binding agents.
Further, by by the two ends pyrocondensation insulating barrier of described wire electrode, so that described wire electrode is fixed on described load bearing component.Further, described wire electrode is made up of platinumiridio or gold.
Further, described electrode is by the continuous electrode of described wire electrode compact winding.
Further, the distance of two adjacent rings wire electrode is 0～0.5mm, described continuous electrode extend on described load bearing component a length of 10～45mm.
Further, described continuous electrode and 1～8 group of wire weld mutually.
Further, described electrode is the packet electrode being wound in many groups by described wire electrode, and often the described wire electrode in group electrode is compact winding.
Further, in described often group electrode, the distance of two adjacent rings wire electrode is 0～0.5mm；The distance of two adjacent groups electrode is 1～15mm, often group electrode extend on described load bearing component a length of 2～5mm.
Further, described often group electrode and one group of wire weld mutually.
Further, described electrode welds mutually with one or more groups wire, and described wire is used for transmitting regulation energy and feedback temperature, impedance.
Further, described electrode is welded together with described wire by scolding tin, and pad is coated with by insulating barrier.
Further, described electrode is welded together with described wire by gold or silver, and pad is exposed or is coated with by insulating barrier.
Further, described load bearing component includes Part I and Part II, and described Part II is coated with described Part I, and described wire is arranged on described Part II inside and passes and described electrode welding from the outermost layer of described Part II.
Further, described renal artery ablation catheter also includes the transfer unit of the position for described adjusting part is transported to described nerve, and the far-end of described transfer unit is connected with the near-end of described load bearing component.
Further, described near-end is the one end away from the neural site needing regulation, and described far-end is the one end near the described neural site needing regulation.
Further, described transfer unit includes that metal tube layer, the outer surface pyrocondensation of described metal tube layer have a floor height molecular layer.
Further, described metal tube layer is made up of NiTi alloy or stainless steel material, and the material of described macromolecule layer is PET, FEP or PTFE.
Further, described radio frequency ablation catheter for renal artery also includes the handle gripped for user, and described handle is connected with the near-end of described transfer unit.
Further, described handle is set to one with the cable that connects of external energy generator.
Further, described wire extends inside the internal described macromolecule layer with described transfer unit of described Part II of described load bearing component and is arranged in described handle.
Further, the energy that described external energy generator occurs is one or more in radio-frequency (RF) energy, heat energy, electromagnetic energy, ultrasonic energy, microwave energy and luminous energy.
Further, being additionally provided with control line in described Part II, described control line has the helical structure of preforming, so that described load bearing component has the helical structure of preforming.
Further, described control line uses metal or macromolecular material to make, and described metal includes NiTi or stainless steel material.
Further, the diameter of described control line is between 0.10～0.50mm.
Further, the outer wall of described control line has the insulating barrier formed by pyrocondensation, and described insulating barrier is PTFE or FEP.
Further, the material of described Part I is NiTi alloy.
Further, the surface of described Part I has cutting decorative pattern, and described cutting decorative pattern is easy to described load bearing component and is switched between described first shape and described second shape.
Further, described cutting decorative pattern be according to cutting angle the surface of described Part I cutting formed straight-line groove or multiple cylindrical groove.
Further, described cutting angle is between 30 °～80 °.
Further, described straight-line groove is identical at the cutting angle on described load bearing component surface.
Further, the described straight-line groove cutting angle on described load bearing component surface is different, described straight-line groove at the cutting angle of the far-end of described load bearing component more than the cutting angle of near-end at described load bearing component.
Further, the cutting interval between adjacent described cylindrical groove is identical.
Further, the material of described Part II is TPU or Pebax.
Further, the external diameter of described transfer unit is 0.6～1.2mm.
Further, the external diameter 0.9～1.45mm of described load bearing component.
Further, described first is shaped as straight or approximates straight, and described second is shaped as spiral type or approximate spiral.
Further, described spiral a diameter of 4～14mm.
Further, a length of the 40～140mm of described load bearing component.
In a kind of better embodiment of the present utility model, provide a kind of radio frequency ablation catheter for renal artery, including for regulating the adjusting part of nerve and for described adjusting part being transported to the transfer unit of the position of described nerve, wherein, described adjusting part includes electrode and for carrying the load bearing component of described electrode, described electrode is for being delivered to described nerve by regulation energy, described electrode includes the wire electrode being wrapped on described load bearing component, described load bearing component has the first shape and the second shape, under described first shape, described adjusting part is arranged to be suitable to move in the blood vessel；Under described second shape, described electrode is in the position being suitable for that described regulation energy is delivered to described nerve；Described renal artery ablation catheter also includes that sheath pipe, described sheath pipe are coated at described transfer unit, and described sheath pipe enables described load bearing component to switch between described first shape and described second shape.
Further, described sheath pipe can slide along described transfer unit under the control of controlling organization, when control described sheath pipe slide into along described transfer unit be coated at described adjusting part time, described load bearing component is switched to described first shape by described second shape, then control described sheath pipe along described transfer unit slide into disengaging described adjusting part time, described load bearing component is switched to described second shape by described first shape.
Further, described renal artery ablation catheter also includes the handle gripped for user, and described handle is connected with the near-end of described transfer unit, and described controlling organization is arranged on described handle.
Further, the internal diameter of described sheath pipe is 1.0～1.45mm, and external diameter is 1.25～1.60mm.
Further, the external diameter 0.9～1.45mm of described load bearing component, the external diameter of described transfer unit is 0.7～1.2mm.
Further, described sheath pipe includes internal layer and outer layer.
Further, the material of described internal layer is PTFE, and wall thickness is 0.015～0.5mm.
Further, described outer layer is containing 20-40wt%BaSO4Pebax or TPU.
Further, being provided with braiding webmaster in described outer layer, described braiding webmaster includes the first braided wires section, the second braided wires section and the 3rd braided wires section.
Further, the hardness of described first braided wires section is 25 ± 15D or 50A-90A, and the hardness of described second braided wires section is 40 ± 15D, and the hardness of described 3rd braided wires section is 72 ± 15D.
Further, the braided wires of described first braided wires section, the second braided wires section and the 3rd braided wires section is stainless steel silk or Ni-Ti silk.
In another better embodiment of the present utility model, provide a kind of radio frequency ablation catheter for renal artery, including for regulating the adjusting part of nerve and for described adjusting part being transported to the transfer unit of the position of described nerve, wherein, described adjusting part includes electrode and for carrying the load bearing component of described electrode, described electrode is for being delivered to described nerve by regulation energy, described electrode includes the wire electrode being wrapped on described load bearing component, described load bearing component has the first shape and the second shape, under described first shape, described adjusting part is arranged to be suitable to move in the blood vessel；Under described second shape, described electrode is in the position being suitable for that described regulation energy is delivered to described nerve；The inside of described load bearing component and the inside of described transfer unit are respectively provided with silk guide passage, silk guide passage within described load bearing component and the silk guide passage within described transfer unit are one, described silk guide passage is easy to the movement of guiding wire, and the movement of described guiding wire can make described load bearing component switch between described first shape and described second shape.
Further, the far-end of described load bearing component has hole, and described guiding wire can enter described silk guide passage by described hole；Being provided with opening on described transfer unit, described opening connects with described silk guide passage, and described opening passes from described silk guide passage for described guiding wire.
Further, the far-end of described load bearing component is provided with the guard block for vascular damaged is reduced or avoided.
Further, described guard block is soft head, and the material of described soft head is silica gel, thermoplastic elastic body.
Further, the centre of described guard block has described hole.
Further, when described guiding wire inserts the described silk guide passage of described load bearing component from the described hole of the far-end of described load bearing component, described load bearing component is switched to described first shape by described second shape；When the described guiding wire described opening from described transfer unit passes and detaches described load bearing component, described load bearing component is switched to described second shape by described first shape.
The radio frequency ablation catheter for renal artery that this utility model provides has the advantage that
(1) described electrode is the continuous electrode formed by wire electrode compact winding or the packet electrode being divided into many groups, compared with the electrode of other form, longer, the electrode of more continuous can be set on described load bearing component, and do not affect the spiral bending of described load bearing component.It addition, compared with prior art, electrode length is longer, and this makes radio frequency ablation catheter for renal artery of the present utility model have more preferable ablation effect.
(2) need not special shape control unit part, utilize guiding wire or the shape of sheath pipe load bearing component, simple in construction, cost of manufacture are low.
(3) load bearing component surface is cut, it is simple to change the shape of load bearing component.
Below with reference to accompanying drawing, the technique effect of design of the present utility model, concrete structure and generation is described further, to be fully understood from the purpose of this utility model, feature and effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of people's kidney；
Fig. 2 is the arteriorenal structural representation of people；
Fig. 3 is the structural representation of the radio frequency ablation catheter for renal artery of sheath cast continuous electrode of the present utility model；
Fig. 4 is the partial enlarged drawing of Fig. 3；
Fig. 5 is the schematic diagram of the straight-line groove that the cutting angle on the surface of the Part I of load bearing component is identical, and in figure, load bearing component is in the first shape；
Fig. 6 is the schematic diagram of the different straight-line groove of the cutting angle on the surface of the Part I of load bearing component, and in figure, load bearing component is in the first shape；
Fig. 7 is another schematic diagram of the different straight-line groove of the cutting angle on the surface of the Part I of load bearing component, and in figure, load bearing component is in the first shape；
Fig. 8 is the schematic diagram of multiple cylindrical grooves on the surface of the Part I of load bearing component, and in figure, load bearing component is in the first shape；
Fig. 9 is the structural representation of the radio frequency ablation catheter for renal artery of sheath cast of the present utility model packet electrode, and in figure, load bearing component is in the second shape；
Figure 10 is the structural representation of the radio frequency ablation catheter for renal artery of quick exchange shape of the mouth as one speaks continuous electrode of the present utility model, and in figure, load bearing component is in the second shape；
Figure 11 is the structural representation of the radio frequency ablation catheter for renal artery of the quick exchange shape of the mouth as one speaks of the present utility model packet electrode, and in figure, load bearing component is in the second shape.
Detailed description of the invention
In this utility model, the abbreviation used:
PTFE refers to politef, i.e. Polytetrafluoroethylene；
FEP refers to fluorinated ethylene propylene copolymer, i.e. Fluorinatedethylenepropylene；
TPU refers to Polyurethane Thermoplastic Elastomer rubber, i.e. Thermoplasticpolyurethanes；
PET refers to polyethylene terephthalate, i.e. Polyethyleneterephthalate；
Pebax refers to polyether block amide, i.e. Polyetherblockamide
For convenience of description, the close user (or handle) of device or parts or the one end away from the neural site needing regulation are referred to as " near-end " by this utility model, one end away from user (or handle) or near the neural site needing regulation of device or parts is referred to as " far-end ".
Nerve in this utility model refers to the renal sympathetic nerve being positioned on people's renal artery；
Regulation nerve refers to removed by damage or non-invasive mode or reduced the activation of described nerve；
Energy refers to one or more in radio frequency, heat, cooling, electromagnetic energy, ultrasound wave, microwave or luminous energy；
Blood vessel refers to people's renal artery；
Be suitable to move in the blood vessel and refer to when adjusting part moves in the blood vessel, adjusting part not injured blood vessel wall；Adjusting part is not more than the internal diameter of blood vessel in the full-size radially of blood vessel；It is prone to when adjusting part moves in the blood vessel by vascular bending section；
The position that described regulation energy is delivered to renal nerve is referred to when regulate parts in the blood vessel time, at least one electrode be in contact blood vessel wall position.
Fig. 1, Fig. 2 show the arteriorenal structure of people's kidney, people.
As it is shown in figure 1, people's kidney includes kidney 1 anatomically, renal artery 2 is connected to heart via the aorta of abdominal part, and oxygen containing blood supplies kidney 1 by renal artery 2；The blood of deoxidation flows to heart via renal veins 3 and postcava 4 from kidney 1.
As in figure 2 it is shown, axially extending along renal artery 2 of renal nerve 21, renal nerve 21 is general in the adventitia of renal artery 2.
The radio frequency ablation catheter for renal artery of embodiment of the present utility model, the renal nerve 21 being positioned on renal artery 2 for regulation, described regulation refers to removed by damage or non-invasive mode or reduced the activation of renal nerve 21.If needing to regulate the nerve at other position (such as, heart related neural), or need other regulative mode (such as, need to improve neural activation), adjustment that those skilled in the art can make rational expectation according to this utility model, that need not be put to creative work.
As shown in figs. 34, an embodiment of the present utility model provides a kind of radio frequency ablation catheter for renal artery, specifically, radio frequency ablation catheter for renal artery for a kind of sheath cast continuous electrode, its structure includes adjusting part and transfer unit 61, adjusting part includes the load bearing component 62 for carrying electrode 5 and regulation energy is delivered to the electrode 5 of nerve, and transfer unit 61 for being transported to the position of nerve by adjusting part.The far-end of transfer unit 61 is connected with the near-end of load bearing component 62.Transfer unit 61 and load bearing component 62 can be one, it is also possible to be split.Transfer unit 61 be shaped as elongate, bar shaped, thread or fibrous one, external diameter is 0.7～1.2mm.Transfer unit 61 includes metal tube layer, and the outer surface pyrocondensation of this metal tube layer has a floor height molecular layer, and wherein metal tube layer is made up of NiTi alloy or stainless steel material, and the material of macromolecule layer is PET, FEP or PTFE.A length of the 40 of load bearing component 62～140mm, external diameter is 0.9～1.45mm, and load bearing component includes Part I and Part II, and Part II is coated with described Part I, and the material of Part I is NiTi alloy, and the material of Part II is TPU or Pebax.
Load bearing component 62 has the first shape and the second shape, and under the first shape, adjusting part is suitable to move in the blood vessel；Under the second shape, regulation energy is delivered to the position of nerve by adjusting part by electrode 5.
In the present embodiment, electrode 5 is by the continuous electrode of wire electrode compact winding, makes specifically by coil winding machine or manual be tightly wound around on load bearing component by wire electrode.Wherein a diameter of the 0.05～0.25mm of wire electrode, in the present embodiment, the diameter of wire electrode is set to 0.10mm.The material of wire electrode can use the metal or metal alloy that biocompatibility is preferable or more stable, such as platinum group metal, gold etc., and the electrode in the present embodiment uses platinumiridio to make.
Electrode 5 extends on load bearing component 62 and has the 4th shape and the 5th shape, 4th shape of electrode 5 adapts with the first shape of load bearing component 62,5th shape of electrode 5 adapts with the second shape of load bearing component 62, i.e. the shape of load bearing component 62 will not be affected because wire electrode is wound in electrode 5 on load bearing component 62.
In order to make electrode 5 be firmly installed on load bearing component 62, and reduce the damage to blood vessel wall, it is possible to use the two ends of wire electrode are adhered on load bearing component 62 so that wire electrode is fixed on load bearing component 62 by glue as far as possible.Glue can be selected for UV solidification glue, epoxide-resin glue or its mixture or other binding agent, had the most both had the biocompatibility that can reach medical application, and again metal alloy and macromolecular material had been had certain cohesive force.Also by the way of pyrocondensation insulating barrier, the two ends of wire electrode can be bonded on load bearing component, thus wire electrode is fixed on load bearing component 62.Continuous electrode extend on load bearing component 62 a length of 10～45mm, the distance of two adjacent rings wire electrode is 0～0.5mm.
Electrode 5 in the present embodiment welds mutually with 1～8 group of wire, and this wire is arranged on inside the Part II of load bearing component 62 and passes from the outermost layer of this Part II and welds with electrode 5, and wire is used for transmitting regulation energy and the parameter such as feedback temperature, impedance.Wire electrode can be welded together with wire by scolding tin, and now pad is coated with by insulating barrier.In other embodiments, wire electrode can also be welded together with wire by gold or silver, and now pad can be exposed, it is also possible to is coated with by insulating barrier.
The radio frequency ablation catheter for renal artery of the sheath cast continuous electrode of the present embodiment also includes the handle gripped for user, and handle 8 is connected with transfer unit 61.Wire extends inside the internal macromolecule layer with transfer unit 61 of Part II of load bearing component 62 and is arranged in handle 8.Handle 8 is set to one with the cable that connects of external energy generator, thus the 1～8 of the present embodiment group of wire also produces equipment such as radiofrequency generator with external energy and is connected.The energy that external energy generator occurs is one or more in radio-frequency (RF) energy, heat energy, electromagnetic energy, ultrasonic energy, microwave energy and luminous energy.
When electrode 5 is in time needing the neural site of regulation, and electrode 5 discharges certain energy and acts on this nerve site, thus plays the effect regulating this nerve site (such as, reduce or eliminate orthosympathetic activation).
Electrode 5 can realize this purpose by transferring heat to this nerve site.Such as, heat transfer heating mechanism for neuroregulation can include that heating ablation and the non-heat melted become or damage, become to realize the non-heat melted for example, it is possible to the temperature of target nerve fiber to be increased to over required threshold value, or exceed higher temperature to realize the heat change melted.Such as, target temperature can at about 37 DEG C-45 DEG C (for the hot temperatures of non-thermal ablation), or, described target temperature can at about 45 DEG C or higher, for melt heat change.
Electrode 5 can also realize this purpose by cooling is delivered to this nerve site.Such as, the temperature of target nerve fiber is reduced to less than about 20 DEG C and becomes to realize the heat of non-frozen, or the temperature of target nerve fiber is reduced to less than about 0 DEG C to realize freezing heat change.
Electrode 5 can also realize by energy field is applied to target nerve fiber.This energy field may include that electromagnetic energy, radio frequency, ultrasound wave (including high-intensity focusing ultrasonic wave), microwave, luminous energy (including laser, infrared ray and near infrared ray) etc..Such as, thermoinducible neuroregulation can by by pulse or continuous print heat energy field be delivered to target nerve fiber and realize.Wherein, a kind of is pulse radiation frequency electric field or other type of pulse heat energy than more preferably energy mode.Pulse radiation frequency electric field or other type of pulse heat energy can facilitate bigger heat level, longer total duration and/or the treatment of the most controlled intravascular renal neuroregulation.
No matter which kind of energy mode to realize the purpose that regulation is neural by, when during user uses the present embodiment, radio frequency ablation catheter for renal artery is operated, electrode 5 needs and produces this energy (such as radiofrequency generator) or make the equipment of electrode 5 this energy of generation itself be electrically connected.The connection of these equipment and electrode 5 and these equipment be prior art well-known to those skilled in the art (such as, in this utility model device, it is provided for connecting the interface of these equipment, plug and play can be realized during use), describe the most in detail.
In the present embodiment, the electrode 5 mode near the renal nerve site needing regulation is: enter human body via blood vessel, by renal artery inwall near neural site.It is thus desirable to solve the technical problem that and be: electrode 5 should be realized and can be close to blood vessel and act on the nerve of relevant position, need again electrode 5 to move the most easily, not injured blood vessel wall.
In the present embodiment, it is additionally provided with control line in the Part II of load bearing component 62, this control line has the helical structure of preforming, so that the helical structure control line that load bearing component has preforming uses metal, such as NiTi or stainless steel material make, and macromolecular material can also be used in other embodiments to make.The diameter of control line is between 0.10～0.50mm.The outer wall of control line has the insulating barrier formed by pyrocondensation, and this insulating barrier is PTFE or FEP.
The first of load bearing component 62 is shaped as straight or approximates straight；The second of load bearing component 62 is shaped as spiral type or approximate spiral；When load bearing component 62 is the first shape, load bearing component 62 carries electrode 5 and moves in the blood vessel；When load bearing component 62 is the second shape, electrode 5 is in the position being suitable for that regulation energy is delivered to renal nerve.
In the present embodiment, the first of load bearing component 62 is shaped as straight or close to straight, it is also possible to be that elongate is fibrous or thread, and the cross section of this straight is preferably circular or sub-circular, and the widest part of cross section is less than the interior diameter of blood vessel.So, under the first shape, when adjusting part moves in the blood vessel, adjusting part will not injured blood vessel wall.When needing the nerve on renal artery is adjusted, owing to the arteriorenal interior diameter of people is generally 4～7mm, therefore, adjusting part is not more than 4mm in arteriorenal full-size radially, it is preferably provided as 1～2mm, both can meet and be moved easily at Ink vessel transfusing, and there is again enough rigidity and be easy to make, it is possible to reducing the size of the wound of patient.As the change of this detailed description of the invention, the first shape can also allow certain bending or corrugated bending, and its cross section can also be other shape, if its smooth surface, it is possible to move and not injured blood vessel wall at Ink vessel transfusing easily.
In the present embodiment, the second shape generally spiral type of load bearing component 62, at blood vessel radially, the widest part of load bearing component is bigger than the first shape, and the electrode 5 of carrying so can be made to come close to or in contact with blood vessel wall, thus near renal nerve.
Having certain elasticity in view of blood vessel, the spiral diameter of load bearing component 62 is set to 4～14mm.It is about 4mm for the individuality that renal artery internal diameter is less, such as internal diameter, the spiral diameter of load bearing component 62 can be set to 5～about 6mm；It is about 7mm for the individuality that renal artery internal diameter is bigger, such as internal diameter, the diameter of spiral can be set to 8～about 9mm.
Second shape of load bearing component 62 can also be other shape, such as, have the irregular shape of round and smooth bending, as long as when load bearing component in the blood vessel time, electrode be in contact blood vessel wall position.
In the present embodiment, for the ease of changing the shape of load bearing component 62, the surface of the Part I of load bearing component 62 is cut.As shown in Fig. 5～Fig. 8, on the surface of the Part I of load bearing component 62, carry out cutting from the far-end of load bearing component 62 to the near-end of load bearing component 62 according to cutting angle and formed.Such as, carry out cutting straight line from the far-end of load bearing component 62 to the near-end of load bearing component 62 according to cutting angle and form straight-line groove,；Carry out cutting multiple cylindrical groove to the near-end of load bearing component from the far-end of load bearing component 62 according to cutting angle.
Horizontal positioned load bearing component 62, if straight-line groove, cutting angle is exactly the angle α of straight line and horizontal direction；If multiple cylindrical grooves, cutting angle is exactly the line between the central point of multiple cylindrical groove and the angle α in horizontal direction.
As it is shown in figure 5, in another preferred embodiment of the present utility model, straight-line groove is the cutting angle with α=53 °, far-end from load bearing component 62 starts the near-end to load bearing component 62, cuts formation according to straight line continuously.Wherein, the cutting width of straight-line groove is between 0.2449mm～0.6566mm, and the cutting angle on the Part I of load bearing component 62 of the straight-line groove shown in Fig. 5 is consistent all the time.
As shown in Figure 6, in another embodiment of the present utility model, straight-line groove includes two parts: a part is the cutting angle with α=53 °, cuts formation from the beginning of the far-end of load bearing component 62, according to straight line continuously；Another part is when near load bearing component 62 near-end, progressively reduces cutting angle (α '), and according to the cutting angle (α ') progressively reduced until the near-end of load bearing component 62, cutting formation continuously according to straight line.
As it is shown in fig. 7, in another embodiment of the present utility model, straight-line groove includes two parts: a part is the cutting angle with α=53 °, formed from the beginning of the far-end of load bearing component 62, according to linear interval cutting；Another part is when near load bearing component near-end, progressively reduces cutting angle (α '), and according to the cutting angle (α ') progressively reduced until the near-end of load bearing component 62, being formed according to linear interval cutting.The cutting width of straight-line groove is between 0.2449mm～0.6566mm.
As shown in Figure 8, in another preferred embodiment of the present utility model, on load bearing component 62, multiple cylindrical grooves are the cutting angles with α=30 °, are spaced (horizontal intervals at adjacent two cylindrical groove centers) according to the cutting of 0.7150mm, proximally cut the formation of multiple cylindricality from the far-end of load bearing component.Each cylindrical groove and horizontal square are 120 ° to angle.
In the present embodiment, electrode 5 is continuous electrode, and compared with the electrode of other form, the length that continuous electrode extends on load bearing component 62 is longer.During it is, in general, that carry out renal nerve ablative surgery, need 3-8 site of renal nerve is melted.And the electrode 5 in the present embodiment is connected with many groups of (such as 1～8 group) wires, on the one hand, during welding many groups wire, its energy transmits evenly, and temperature, impedance monitoring are more accurate；Another aspect is continuous electrode due to electrode 5, thus the electrode in electrode 5 releases energy simultaneously.So, when using the pipe guide in the present embodiment to carry out ablative surgery, it is only necessary to the location carrying out Primary regulation assembly just can complete ablative surgery, and has good ablation effect.
May be provided for measuring the element of temperature, such as thermocouple on load bearing component 62.
The far-end of load bearing component 62 is provided with the guard block 10 for vascular damaged is reduced or avoided; one effect of guard block 10 is that vascular damaged is reduced or avoided; when touching blood vessel wall because self sufficiently flexible and can resilience rapidly, blood vessel will not be caused damage；Another effect of guard block 10 is that whole radio frequency ablation catheter for renal artery is played guide effect, and when running into the bending place of blood vessel, self can bend according to the bending degree of blood vessel, thus guide whole pipe guide to pass through the bending place of blood vessel.
Guard block 10 is relatively soft parts, can be the parts that make of the relatively soft macromolecular material of material, and in the present embodiment, guard block 10 is soft head, as shown in Figure 4, it is to avoid the far-end injured blood vessel of load bearing component；Soft head uses elastomeric material to make, and elastomeric material is rubber, silica gel or thermoplastic elastomer (TPE)；A length of the 3 of soft head～15mm, maximum gauge is less than 1.33mm.
In other embodiments, guard block 10 can also be spring, is arranged at the far-end of load bearing component, and spring uses Ni-Ti alloy or rustless steel to make, and pitch is closing twist, it is possible to meet aeroelastic requirements.A length of the 25 of spring～50mm, spiral external diameter is 0.25～0.6mm, a diameter of the 0.045 of spring wire～0.12mm.
In the present embodiment, as shown in figs. 34, the radio frequency ablation catheter for renal artery of sheath cast continuous electrode also includes sheath pipe 7, this sheath pipe 7 is coated at transfer unit 61, for regulating the shape of load bearing component 62, sheath pipe 7 can slide along transfer unit 61 under the control of the controlling organization 81 being installed on handle 8, thus sheath pipe 7 makes load bearing component 62 can switch between the first shape and the second shape.Specifically, when control sheath pipe 7 slide into along transfer unit 61 be coated at adjusting part time, owing to the hardness ratio load bearing component 62 of the material of sheath pipe 7 far-end is big, load bearing component 62 is switched to by second shape (spiral type or approximate spiral) of original state can the first shape (straight or close to straight), then when control sheath pipe 7 slides into along transfer unit 61 and departs from adjusting part, due to the elastic acting force of load bearing component 62 self, load bearing component 62 is returned to the second shape by the first shape.It is achieved in the load bearing component 62 switching between the first shape and the second shape.It addition, the far-end of sheath pipe 7 or distal attachment may be provided for showing the flag member of sheath pipe under X-ray, in order to avoid when operation, damaging nephridial tissue outside sheath pipe 7 stretches out load bearing component 62 too much.
The internal diameter of sheath pipe 7 is 1.0～1.45mm, and external diameter is 1.25～1.60mm.Sheath pipe 7 includes that internal layer and outer layer, internal layer wall thickness are 0.015～0.5mm, and the material of internal layer is PTFE, and coefficient of friction is less, can play smooth effect relative to load bearing component 62 when sheath pipe 7 slides.The material of outer layer is Pebax or TPU, can be containing 20～40wt%BaSO4。
The outer layer of sheath pipe 7 can arrange braiding webmaster, including the first braided wires section, the second braided wires section and the 3rd braided wires section.The hardness of the first braided wires section is 25 ± 15D or 50A-90A, and the hardness of the second braided wires section is 40 ± 15D, and the hardness of the 3rd braided wires section is 72 ± 15D.The braided wires of the first braided wires section, the second braided wires section and the 3rd braided wires section is stainless steel silk or Ni-Ti silk.The hardness that first braided wires section, the second braided wires section are different with the 3rd braided wires section can be realized by the hardness of identical form of presentation and different outer layer materials (such as Pebax), it is also possible to hardness and different form of presentations by identical outer layer material (such as Pebax) realize.
Fig. 9 is the structural representation of the radio frequency ablation catheter for renal artery of sheath cast of the present utility model packet electrode, and unlike the radio frequency ablation catheter for renal artery of sheath cast continuous electrode, electrode therein is the packet electrode being wound in many groups by wire electrode.The most often the wire electrode in group electrode 11 is compact winding, and often the distance of two adjacent rings wire electrode in group electrode 11 is 0～0.5mm, and the distance of two adjacent groups electrode is 1～15mm, often group electrode 11 extend on load bearing component 62 a length of 2～5mm.Often group electrode 11 in packet electrode welds mutually with one group of wire.This packet electrode is compared with the electrode of other form existing, it is also possible to increases the length on load bearing component 62, thus has preferable ablation effect.Can be connected with each other between each group electrode, it is also possible to be not connected with each other and independent of one another.If respectively group electrode is interconnective, respectively group electrode releases energy simultaneously, if respectively group electrode is independent of each other, then can individually control one group of electrode and individually release energy.
Sheath cast continuous electrode or the work process of the radio frequency ablation catheter for renal artery of sheath cast packet electrode in embodiment of the present utility model are as follows:
(1) first along transfer unit 61, sheath pipe 7 being slid into adjusting part, load bearing component 62 is become the first shape (straight or approximate straight) from the second shape (spiral type or approximate spiral), it is simple to move in the blood vessel；
(2) move at the radio frequency ablation catheter for renal artery renal sympathetic nerve to people's renal artery；
(3) sheath pipe 7 is slid into disengaging load bearing component 62, load bearing component 62 is become the second shape from the first shape, electrode 5 on load bearing component 62 is close to blood vessel and is acted on the nerve of relevant position, discharge certain energy thus play the effect regulating this nerve site (such as, reduce or eliminate orthosympathetic activation)；
(4) sheath pipe 7 sliding into adjusting part again, load bearing component 62 is become the first shape from the second shape again；
(5) radio frequency ablation catheter for renal artery is removed human body.
In addition to the shape of load bearing component 62 being controlled above by sheath pipe 7, it is also possible to control the shape of load bearing component 62 by another way.The such as radio frequency ablation catheter for renal artery quickly exchanging shape of the mouth as one speaks continuous electrode shown in Figure 10, and the radio frequency ablation catheter for renal artery of the quickly exchange shape of the mouth as one speaks packet electrode shown in Figure 11.In its structure, as shown in Figure 10 and Figure 11, unlike the radio frequency ablation catheter for renal artery being grouped electrode from sheath cast continuous electrode or sheath cast, the inside (inside of the Part I of load bearing component 62 specifically) of load bearing component 62 and the inside (inside of the metal tube layer in transfer unit 61 specifically) of transfer unit 61 have silk guide passage (not shown), silk guide passage within load bearing component 62 and the silk guide passage within transfer unit 61 are one, silk guide passage is easy to the movement of guiding wire, the movement of guiding wire can make load bearing component 62 switch between the first shape and the second shape.The centre of the guard block 10 of load bearing component 62 far-end has hole (not shown), and guiding wire can enter silk guide passage by this hole.Being provided with opening 12 on transfer unit 61, referred to herein as quickly exchange mouth, this opening connects with silk guide passage, passes from silk guide passage for guiding wire.Specifically, when guiding wire inserts the silk guide passage of load bearing component 62 from the hole of the far-end of load bearing component 62, load bearing component 62 is switched to the first shape by the second shape；When guiding wire opening 12 from transfer unit 61 passes and detaches load bearing component 62, load bearing component 62 is switched to the second shape by the first shape.
In the present embodiment, the material of guiding wire is NiTi alloy.
Quickly exchange shape of the mouth as one speaks continuous electrode or the work process of the radio frequency ablation catheter for renal artery of quick exchange shape of the mouth as one speaks packet electrode in embodiment of the present utility model are as follows:
(1) first guiding wire is imported at the renal sympathetic nerve on human body predetermined position, i.e. people's renal artery；
(2) by guiding wire afterbody, by the hole in the middle of the guard block 10 of radio frequency ablation catheter for renal artery front end, insert the silk guide passage of load bearing component 62, and the quickly exchange mouth 12 of 61 passes from transfer unit；Owing to guiding wire inserts load bearing component, load bearing component 62 is become the first shape (straight or approximate straight) from the second shape (spiral type or approximate spiral), it is simple to move in the blood vessel；
(3) move at the radio frequency ablation catheter for renal artery renal sympathetic nerve to people's renal artery；
(4) guiding wire is detached load bearing component 62, load bearing component 62 is become the second shape from the first shape, electrode 5 on load bearing component 62, it is close to blood vessel and acts on the nerve of relevant position, discharge certain energy thus play the effect regulating this nerve site (such as, reduce or eliminate orthosympathetic activation)；
(5) guiding wire pushing load bearing component 62, load bearing component 62 is become the first shape from the second shape again；
(6) radio frequency ablation catheter for renal artery is removed human body.
Preferred embodiment of the present utility model described in detail above.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 technical staff in the art pass through the available technical scheme of logical analysis, reasoning, or a limited experiment on the basis of existing technology according to design of the present utility model, all should be in the protection domain being defined in the patent claims.
Claims (54)
1. a radio frequency ablation catheter for renal artery, including the adjusting part for regulating nerve, it is characterized in that, described adjusting part includes electrode and for carrying the load bearing component of described electrode, described electrode is for being delivered to described nerve by regulation energy, and described electrode includes the wire electrode being wrapped on described load bearing component, and described load bearing component has the first shape and the second shape, under described first shape, described adjusting part is arranged to be suitable to move in the blood vessel；Under described second shape, described electrode is in the position being suitable for that described regulation energy is delivered to described nerve.
2. radio frequency ablation catheter for renal artery as claimed in claim 1, it is characterized in that, described electrode extends on described load bearing component, described electrode is made to have the 4th shape and the 5th shape, 4th shape of described electrode adapts with the first shape of described load bearing component, and the 5th shape of described electrode adapts with the second shape of described load bearing component.
3. radio frequency ablation catheter for renal artery as claimed in claim 1, it is characterised in that described wire electrode is wound around by coil winding machine or craft and makes on described load bearing component by described electrode.
4. radio frequency ablation catheter for renal artery as claimed in claim 1 or 2, it is characterised in that a diameter of the 0.05 of described wire electrode～0.25mm.
5. radio frequency ablation catheter for renal artery as claimed in claim 1, it is characterised in that utilize glue to be adhered on described load bearing component at the two ends of described wire electrode, so that described wire electrode is fixed on described load bearing component.
6. radio frequency ablation catheter for renal artery as claimed in claim 1, it is characterised in that by by the two ends pyrocondensation insulating barrier of described wire electrode, so that described wire electrode is fixed on described load bearing component.
7. radio frequency ablation catheter for renal artery as claimed in claim 1, it is characterised in that described wire electrode is made up of platinumiridio or gold.
8. radio frequency ablation catheter for renal artery as claimed in claim 1, it is characterised in that described electrode is by the continuous electrode of described wire electrode compact winding.
9. radio frequency ablation catheter for renal artery as claimed in claim 8, it is characterised in that the distance of two adjacent rings wire electrode is 0～0.5mm, described continuous electrode extend on described load bearing component a length of 10～45mm.
10. radio frequency ablation catheter for renal artery as claimed in claim 8, it is characterised in that described continuous electrode and 1～8 group of wire weld mutually.
11. radio frequency ablation catheter for renal arteries as claimed in claim 1, it is characterised in that described electrode is the packet electrode being wound in many groups by described wire electrode, and often the described wire electrode in group electrode is compact winding.
12. radio frequency ablation catheter for renal arteries as claimed in claim 11, it is characterised in that in described often group electrode, the distance of two adjacent rings wire electrode is 0～0.5mm；The distance of two adjacent groups electrode is 1～15mm, often group electrode extend on described load bearing component a length of 2～5mm.
13. radio frequency ablation catheter for renal arteries as claimed in claim 11, it is characterised in that described often group electrode and one group of wire weld mutually.
14. radio frequency ablation catheter for renal arteries as claimed in claim 1, it is characterised in that described electrode welds mutually with one or more groups wire, described wire is used for transmitting regulation energy and feedback temperature, impedance.
15. radio frequency ablation catheter for renal arteries as claimed in claim 14, it is characterised in that described electrode is welded together with described wire by scolding tin, and pad is coated with by insulating barrier.
16. radio frequency ablation catheter for renal arteries as claimed in claim 14, it is characterised in that described electrode is welded together with described wire by gold or silver, and pad is exposed or is coated with by insulating barrier.
17. radio frequency ablation catheter for renal arteries as described in claim 15 or 16, it is characterized in that, described load bearing component includes Part I and Part II, described Part II is coated with described Part I, and described wire is arranged on described Part II inside and passes and described electrode welding from the outermost layer of described Part II.
18. radio frequency ablation catheter for renal arteries as claimed in claim 17, it is characterized in that, described renal artery ablation catheter also includes the transfer unit of the position for described adjusting part is transported to described nerve, the far-end of described transfer unit is connected with the near-end of described load bearing component, near-end is the one end away from the neural site needing regulation, and described far-end is the one end near the described neural site needing regulation.
19. radio frequency ablation catheter for renal arteries as claimed in claim 18, it is characterised in that described transfer unit includes that metal tube layer, the outer surface pyrocondensation of described metal tube layer have a floor height molecular layer.
20. radio frequency ablation catheter for renal arteries as claimed in claim 19, it is characterised in that the external diameter of described transfer unit is 0.6～1.2mm.
21. radio frequency ablation catheter for renal arteries as claimed in claim 19, it is characterised in that described metal tube layer is made up of NiTi alloy or stainless steel material, and the material of described macromolecule layer is PET, FEP or PTFE.
22. radio frequency ablation catheter for renal arteries as claimed in claim 19, it is characterised in that described radio frequency ablation catheter for renal artery also includes the handle gripped for user, and described handle is connected with the near-end of described transfer unit.
23. radio frequency ablation catheter for renal arteries as claimed in claim 22, it is characterised in that described handle is set to one with the cable that connects of external energy generator.
24. radio frequency ablation catheter for renal arteries as claimed in claim 22, it is characterised in that described wire extends inside the internal described macromolecule layer with described transfer unit of described Part II of described load bearing component and is arranged in described handle.
25. radio frequency ablation catheter for renal arteries as claimed in claim 17, it is characterised in that being additionally provided with control line in described Part II, described control line has the helical structure of preforming, so that described load bearing component has the helical structure of preforming.
26. radio frequency ablation catheter for renal arteries as claimed in claim 25, it is characterised in that described control line uses metal or macromolecular material to make, and described metal includes NiTi or stainless steel material.
27. radio frequency ablation catheter for renal arteries as claimed in claim 25, it is characterised in that the diameter of described control line is between 0.10～0.50mm.
28. radio frequency ablation catheter for renal arteries as claimed in claim 25, it is characterised in that the outer wall of described control line has the insulating barrier formed by pyrocondensation, and described insulating barrier is PTFE or FEP.
29. radio frequency ablation catheter for renal arteries as claimed in claim 17, it is characterised in that the material of described Part I is NiTi alloy.
30. radio frequency ablation catheter for renal arteries as claimed in claim 17, it is characterised in that the surface of described Part I has cutting decorative pattern, described cutting decorative pattern is easy to described load bearing component and is switched between described first shape and described second shape.
31. radio frequency ablation catheter for renal arteries as claimed in claim 30, it is characterised in that described cutting decorative pattern be according to cutting angle the surface of described Part I cutting formed straight-line groove or multiple cylindrical groove.
32. radio frequency ablation catheter for renal arteries as claimed in claim 31, it is characterised in that described cutting angle is between 30 °～80 °.
33. radio frequency ablation catheter for renal arteries as claimed in claim 17, it is characterised in that the material of described Part II is TPU or Pebax.
34. radio frequency ablation catheter for renal arteries as claimed in claim 1, it is characterised in that the external diameter 0.9～1.45mm of described load bearing component.
35. radio frequency ablation catheter for renal arteries as claimed in claim 1, it is characterised in that described first is shaped as straight or approximates straight, and described second is shaped as spiral type or approximate spiral.
36. radio frequency ablation catheter for renal arteries as claimed in claim 35, it is characterised in that described spiral a diameter of 4～14mm.
37. radio frequency ablation catheter for renal artery as claimed in claim 1, it is characterised in that a length of the 40 of described load bearing component～140mm.
38. 1 kinds of radio frequency ablation catheter for renal arteries, including for regulating the adjusting part of nerve and for described adjusting part being transported to the transfer unit of the position of described nerve, it is characterized in that, described adjusting part includes electrode and for carrying the load bearing component of described electrode, described electrode is for being delivered to described nerve by regulation energy, described electrode includes the wire electrode being wrapped on described load bearing component, described load bearing component has the first shape and the second shape, under described first shape, described adjusting part is arranged to be suitable to move in the blood vessel；Under described second shape, described electrode is in the position being suitable for that described regulation energy is delivered to described nerve；
Described renal artery ablation catheter also includes that sheath pipe, described sheath pipe are coated at described transfer unit, and described sheath pipe enables described load bearing component to switch between described first shape and described second shape.
39. radio frequency ablation catheter for renal arteries as claimed in claim 38, it is characterized in that, described sheath pipe can slide along described transfer unit under the control of controlling organization, when control described sheath pipe slide into along described transfer unit be coated at described adjusting part time, described load bearing component is switched to described first shape by described second shape, then control described sheath pipe along described transfer unit slide into disengaging described adjusting part time, described load bearing component is switched to described second shape by described first shape.
40. radio frequency ablation catheter for renal arteries as claimed in claim 39, it is characterised in that described renal artery ablation catheter also includes the handle gripped for user, and described handle is connected with the near-end of described transfer unit, and described controlling organization is arranged on described handle.
41. radio frequency ablation catheter for renal arteries as claimed in claim 38, it is characterised in that the internal diameter of described sheath pipe is 1.0～1.45mm, and external diameter is 1.25～1.60mm.
42. radio frequency ablation catheter for renal arteries as claimed in claim 41, it is characterised in that the external diameter 0.9～1.45mm of described load bearing component, the external diameter of described transfer unit is 0.7～1.2mm.
43. radio frequency ablation catheter for renal arteries as claimed in claim 38, it is characterised in that described sheath pipe includes internal layer and outer layer.
44. radio frequency ablation catheter for renal arteries as claimed in claim 43, it is characterised in that the material of described internal layer is PTFE, and wall thickness is 0.015～0.5mm.
45. radio frequency ablation catheter for renal arteries as claimed in claim 43, it is characterised in that described outer layer is containing 20-40wt%BaSO4Pebax or TPU.
46. radio frequency ablation catheter for renal arteries as claimed in claim 43, it is characterised in that be provided with braiding webmaster in described outer layer, described braiding webmaster includes the first braided wires section, the second braided wires section and the 3rd braided wires section.
47. radio frequency ablation catheter for renal arteries as claimed in claim 46, it is characterised in that the hardness of described first braided wires section is 25 ± 15D or 50A-90A, the hardness of described second braided wires section is 40 ± 15D, and the hardness of described 3rd braided wires section is 72 ± 15D.
48. radio frequency ablation catheter for renal arteries as claimed in claim 46, it is characterised in that the braided wires of described first braided wires section, the second braided wires section and the 3rd braided wires section is stainless steel silk or Ni-Ti silk.
49. 1 kinds of radio frequency ablation catheter for renal arteries, including for regulating the adjusting part of nerve and for described adjusting part being transported to the transfer unit of the position of described nerve, it is characterized in that, described adjusting part includes electrode and for carrying the load bearing component of described electrode, described electrode is for being delivered to described nerve by regulation energy, described electrode includes the wire electrode being wrapped on described load bearing component, described load bearing component has the first shape and the second shape, under described first shape, described adjusting part is arranged to be suitable to move in the blood vessel；Under described second shape, described electrode is in the position being suitable for that described regulation energy is delivered to described nerve；
The inside of described load bearing component and the inside of described transfer unit are respectively provided with silk guide passage, silk guide passage within described load bearing component and the silk guide passage within described transfer unit are one, described silk guide passage is easy to the movement of guiding wire, and the movement of described guiding wire can make described load bearing component switch between described first shape and described second shape.
50. radio frequency ablation catheter for renal arteries as claimed in claim 49, it is characterised in that the far-end of described load bearing component has hole, described guiding wire can enter described silk guide passage by described hole；Being provided with opening on described transfer unit, described opening connects with described silk guide passage, and described opening passes from described silk guide passage for described guiding wire.
51. radio frequency ablation catheter for renal arteries as claimed in claim 50, it is characterised in that the far-end of described load bearing component is provided with the guard block for vascular damaged is reduced or avoided.
52. radio frequency ablation catheter for renal arteries as claimed in claim 51, it is characterised in that described guard block is soft head, and the material of described soft head is silica gel, thermoplastic elastic body.
53. radio frequency ablation catheter for renal arteries as claimed in claim 51, it is characterised in that the centre of described guard block has described hole.
54. radio frequency ablation catheter for renal arteries as claimed in claim 50, it is characterized in that, when described guiding wire inserts the described silk guide passage of described load bearing component from the described hole of the far-end of described load bearing component, described load bearing component is switched to described first shape by described second shape；When the described guiding wire described opening from described transfer unit passes and detaches described load bearing component, described load bearing component is switched to described second shape by described first shape.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9554848B2 (en) | 1999-04-05 | 2017-01-31 | Medtronic, Inc. | Ablation catheters and associated systems and methods |
| US9675413B2 (en) | 2002-04-08 | 2017-06-13 | Medtronic Ardian Luxembourg S.A.R.L. | Methods and apparatus for renal neuromodulation |
| CN106852703A (en) * | 2015-12-08 | 2017-06-16 | 上海安通医疗科技有限公司 | A kind of radio frequency ablation catheter for renal artery |
| US9707035B2 (en) | 2002-04-08 | 2017-07-18 | Medtronic Ardian Luxembourg S.A.R.L. | Methods for catheter-based renal neuromodulation |
| US9855096B2 (en) | 2012-05-11 | 2018-01-02 | Medtronic Ardian Luxembourg S.A.R.L. | Multi-electrode catheter assemblies for renal neuromodulation and associated systems and methods |
| US9888961B2 (en) | 2013-03-15 | 2018-02-13 | Medtronic Ardian Luxembourg S.A.R.L. | Helical push wire electrode |
| US10076382B2 (en) | 2010-10-25 | 2018-09-18 | Medtronic Ardian Luxembourg S.A.R.L. | Catheter apparatuses having multi-electrode arrays for renal neuromodulation and associated systems and methods |
| US10736690B2 (en) | 2014-04-24 | 2020-08-11 | Medtronic Ardian Luxembourg S.A.R.L. | Neuromodulation catheters and associated systems and methods |
| CN111544110A (en) * | 2020-05-06 | 2020-08-18 | 安进医疗科技（北京）有限公司 | Endoscopic surgery electrode assembly |
| US11213678B2 (en) | 2013-09-09 | 2022-01-04 | Medtronic Ardian Luxembourg S.A.R.L. | Method of manufacturing a medical device for neuromodulation |
| CN114711955A (en) * | 2022-05-11 | 2022-07-08 | 上海安通医疗科技有限公司 | Electric control ablation catheter for radial artery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9554848B2 (en) | 1999-04-05 | 2017-01-31 | Medtronic, Inc. | Ablation catheters and associated systems and methods |
| US9707035B2 (en) | 2002-04-08 | 2017-07-18 | Medtronic Ardian Luxembourg S.A.R.L. | Methods for catheter-based renal neuromodulation |
| US9675413B2 (en) | 2002-04-08 | 2017-06-13 | Medtronic Ardian Luxembourg S.A.R.L. | Methods and apparatus for renal neuromodulation |
| US10076382B2 (en) | 2010-10-25 | 2018-09-18 | Medtronic Ardian Luxembourg S.A.R.L. | Catheter apparatuses having multi-electrode arrays for renal neuromodulation and associated systems and methods |
| US11116572B2 (en) | 2010-10-25 | 2021-09-14 | Medtronic Ardian Luxembourg S.A.R.L. | Catheter apparatuses having multi-electrode arrays for renal neuromodulation and associated systems and methods |
| US9855096B2 (en) | 2012-05-11 | 2018-01-02 | Medtronic Ardian Luxembourg S.A.R.L. | Multi-electrode catheter assemblies for renal neuromodulation and associated systems and methods |
| US10512504B2 (en) | 2012-05-11 | 2019-12-24 | Medtronic Ardian Luxembourg S.A.R.L. | Multi-electrode catheter assemblies for renal neuromodulation and associated systems and methods |
| US9888961B2 (en) | 2013-03-15 | 2018-02-13 | Medtronic Ardian Luxembourg S.A.R.L. | Helical push wire electrode |
| US10792098B2 (en) | 2013-03-15 | 2020-10-06 | Medtronic Ardian Luxembourg S.A.R.L. | Helical push wire electrode |
| US11213678B2 (en) | 2013-09-09 | 2022-01-04 | Medtronic Ardian Luxembourg S.A.R.L. | Method of manufacturing a medical device for neuromodulation |
| US10736690B2 (en) | 2014-04-24 | 2020-08-11 | Medtronic Ardian Luxembourg S.A.R.L. | Neuromodulation catheters and associated systems and methods |
| CN106852703A (en) * | 2015-12-08 | 2017-06-16 | 上海安通医疗科技有限公司 | A kind of radio frequency ablation catheter for renal artery |
| CN111544110A (en) * | 2020-05-06 | 2020-08-18 | 安进医疗科技（北京）有限公司 | Endoscopic surgery electrode assembly |
| CN114711955A (en) * | 2022-05-11 | 2022-07-08 | 上海安通医疗科技有限公司 | Electric control ablation catheter for radial artery |
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