A kind of large area discharge ablating deviceTechnical field
The present invention relates to medical radio-frequency ablation techniques fields, and in particular to a kind of large area discharge ablating device.
Background technique
Human body is the labyrinths being made of many organic and inorganic substances, contains a large amount of dielectric in body fluid, such as fromSon, water, colloidal particles etc., human body rely primarily on the mobile conduction electric current of ion.Under the action of high-frequency alternating current, the concentration of ionChange direction is that positive-negative half-cycle changes back and forth with current direction.Under the higher-order of oscillation, the ion between two electrodes is along power line sideTo quick movement, vibrational state is gradually become by moving condition.Due to the size of various ions, quality, charge and movement speedDifference, ion mutually rub and collide with other particles and generate biological heat effect, and radio frequency refers to radio frequency, but it is notBelong to the division of radio communication medium wave band because radiance is very low in such frequency range, therefore in communication apparatus compared withFew to use, the effect in face of human body is mainly fuel factor, when the power frequency height of radio frequency is to certain value, can cause band in tissueThe ion motion of charge causes that the intraor extracellular moisture in tissue is evaporated, dried, pyknosis falls off so that sterile to frictional heat generationProperty necrosis.RF ablation is to carry out local heating's heating to the lesion tissue of human body using high-frequency radio-frequency current, from makingLesion tissue aseptic necrosis is obtained, to achieve the purpose that treatment.
Currently, radio-frequency ablation procedure is applied to the treatment of a variety of diseases, such as arrhythmia cordis, all kinds of cancers, disc herniationWith RFA thyroid gland etc..The equipment generallyd use is mainly containing for the tissue that radio-frequency apparatus, back pole plate and contact will meltThere is the conduit (or electrode needle) of electrode, back pole plate is affixed on human body back, what the ablation catheter contact containing electrode will meltThe tissue of human body, back pole plate are connected with an electrode of radio-frequency apparatus, the electrode and radio-frequency apparatus on ablation catheter anotherElectrode is connected, can be in radio-frequency apparatus, back pole plate, tissue and ablation catheter (or electrode needle) shape when such as radio-frequency apparatus workThe current loop being closed at one, the electrode and human body being far longer than on ablation catheter due to the area of back pole plate and human contactThe area of contact is organized, the current density of the tissue contacted with back pole plate is much smaller than the human body contacted with ablation catheter electrodeCurrent density is organized, under the action of radio-frequency current, the temperature of the partial body's tissue contacted with ablation catheter electrode is increased, whenWhen temperature reaches a certain level, partial body's tissue necrosis.
But it is smaller using the area that current ablation techniques are melted, it needs to need repeatedly to disappear when large area ablationMelt, and, since back pole plate is affixed on human skin tissue, and the group melted is needed to be woven in inside of human body, is carried out by radio-frequency currentIt can be powered to entire human body when ablation, especially the tissue between the current path of ablation catheter and back pole plate, same meetingThere is temperature raising, the risk for damaging normal tissue is higher.
Also, it needs that lesions position is accurately positioned before ablative surgery, currently used technology is in ablation electricityIt is first placed while ablation after additional mapping catheter carries out mapping and carries out ablation again in pole.The additional mapping of current increaseConduit, which carries out ablation, will increase difficulty and the time of operation, while also increase pain and expense to patient.
In addition, at present when carrying out ablative surgery, it is required to guiding sheath and offsets melt the puncture of pipe and be oriented to, guide sheathPipe can have different bending direction and crooked radian according to the control of operator, this is carried out by the handle of guiding sheathControl, guiding sheath at present can not only cooperate ablation catheter to use, moreover it is possible to cooperate a variety of medical tube tools to use, such as mapping catheterDeng, guiding sheath make in medical instrument commonly use medical machinery component.The channel in sheath with tubulose is guided, for being arranged ablationConduit needs that first ablation catheter is put into the official jargon for guiding sheath, ablation catheter can be opposite when actually carrying out puncturing operationSheath sliding is guided, after the tissue for needing to puncture by the positioning of mapping catheter mapping, makes the bending of adjustment guiding sheathDirection and curvature make head end be directed toward the position for needing to puncture, and then control ablation catheter and slide in guiding sheath, make to meltThe position that the head end contact of conduit needs to puncture, is finally punctured.But it is needed at least when carrying out ablation puncture at presentTwo people operate simultaneously, and a people controls guiding sheath, and a people controls ablation catheter, and the cooperation for needing two people poles to have tacit agreement can succeedIt realizes and punctures, operating process is complicated, time-consuming and laborious.
In conclusion ablation techniques use the back pole plate for being affixed on skin histology and ablation catheter to carry out electric discharge ablation at present,It is small and damage that the risk of normal tissue is higher, and when ablation needs additional mapping catheter that single melts area.
Therefore, a kind of ablation techniques are needed, the risk for being capable of increasing the area of single ablation and damage normal tissue is lower,In ablation without additional mapping catheter.
Summary of the invention
It is an object of the invention to: for the mapping catheter and ablation that current ablation catheter ablation area is small, needs are additionalDevice problem complicated for operation, providing a kind of can be improved single ablation area, without additional mapping catheter and easy to operateLarge area discharge ablating device.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of large area discharge ablating device, including the ablation catheter for ablation and for guiding ablation catheter direction sideTo guide wire, the ablation catheter is slidably arranged in the official jargon of the guide wire, and the guide wire includes operating convenient for peopleGuiding handle, the ablation catheter include convenient for people operation ablation handle, the ablation handle be slidably arranged in described in leadDraw on handle,
The ablation catheter includes tube body, and the tube body includes the solution cavity for eliminating medicine liquid to be transmitted to tissue,At least two foil gauges are arranged in the end sides that the tube body protrudes into human body, and at least two foil gauges are in the tube body circumferenceMisplace arrangement on direction, and the end that the tube body protrudes into human body is provided at least two for conductive conductive component, make described inConductive component connect radio-frequency current after, radio-frequency current successively pass through the conductive component, tissue and other described in leadElectrical components form closed circuit, and at least form a closed circuit, and particularly, the conductive component is electrode, more particularly,The raw material of electrode are stainless steel or platinumiridio.
Existing ablation techniques paste back pole plate in human skin tissue, need the tissue surface melted placement to disappear in inside of human bodyMelt conduit, radio-frequency current be transmitted to by tissue by ablation catheter and back pole plate, quite in the inner surface of tissue andOuter surface applies electric current, and current direction heats direction and be also perpendicular to human tissue surface perpendicular to human tissue surface, becauseThis, can melt certain depth, still, heated due to being only perpendicular to human body surface, be only longitudinal heating, lack transverse directionHeating source in the transverse direction of human tissue surface is heated by heat transfer, and therefore, traversing heating zone is small, melts areaIt is small.
This programme uses the conductive component on ablation catheter by the way that at least two conductive components are arranged on ablation catheterTo tissue transmit radio-frequency current, radio-frequency current successively pass through the conductive component, tissue and other described in leadElectrical components form closed circuit, and at least form a closed circuit, that is, have at least two conductive components to connect when being poweredTissue is touched, in this way, exactly being heated in the transverse direction of tissue, compared to existing longitudinal heating, heating surface (area) (HS increasesGreatly, the lesion tissue of large area can be quickly melted, the ablative surgery time is saved, ablation efficiency is improved, so as to mitigate diseasePeople's pain, reduces operation risk.
In addition, clinically certain cases are intermittent breaking-outs, therefore need to carry out Induced by Stimulation disease in treatment, disappearingTo be exactly found lesions position when melting treatment, but currently, searching for this kind of lesion tissue, needs in seizure of diseaseIt can accurately be positioned, still, this kind of intermittence disease, disease time is difficult to control, mostly with drug-induced, increase diseasePeople's pain, although can be induced an illness by the way of electric shock, there is no relevant devices for existing medical instrument, also,It is difficult to carry out induction stimulation using the ablation catheter in existing ablation techniques, because electric current is transmitted to ablation catheter by back pole plateThe tissue area passed through is too big, even if disease is induced, it is also difficult to determine the concrete position of lesion tissue, it is clinical at presentThere is no induce to find lesion tissue using this direction.And apply two conductive components of electric current in this programme to tissueIt being arranged on ablation catheter, the tissue area that electric current passes through is small, it is easy the accurate specific location for determining lesion tissue, becauseThis, can induce an illness and help to find lesion tissue, can more quickly and accurately determine the position of lesion tissue, Neng GoujieThe ablative surgery time is saved, ablation efficiency is improved, so as to mitigate patient's pain, reduces operation risk.
In addition, multiple conductive components are directly arranged in this programme on ablation catheter, back pole plate may not need when being melted,After multiple conductive components are contacted with tissue, in supravasal conductive component radio-frequency current is transmitted to by setting to be ablatedTissue to being melted, may not need back pole plate when being melted, so that device is simpler.
Also, the application ablation catheter can be used and carry out mapping positioning, after the completion of mapping positioning, this Shen can be directlyed adoptPlease ablation catheter melted, perform the operation it is more convenient.
When melting to complex organization or more tiny tissue, minor diameter ablation catheter is needed, still, ablationConduit diameter becomes to become more elongated after reducing, and becomes more soft, is difficult to control due to excessively soft when being puncturedAblation catheter processed makes ablation catheter head end touch the tissue for needing to melt, also, for this kind of ablative surgery, needs specialSheath, higher cost are guided, and the guide wire of this programme is set on ablation catheter, does not allow ablation catheter flexible, ablationConduit is easy to control, and can guarantee ablation effect, mitigates patient suffering.
Preferably, the radial dimension that the ablation catheter protrudes into the end of human body is less than or equal to the guiding tube cavityRadial dimension, that is to say, that ablation catheter be fully able in the inner cavity of guide wire stretch, in this way, ablation catheter than guidingPipe is thinner, and the tissue that ablation catheter can reach more tiny is melted.
Preferably, at least two foil gauges are arranged in the end sides that the tube body protrudes into human body, answered described at least twoBecome piece to misplace on the tube body circumferencial direction arrangement.
Currently, being confirmed only under the conditions of the contact pressure of the electrode of distal end of catheter and tissue is suitable by clinicalAblation can be only achieved preferable therapeutic effect.It is to insert the catheter into heart when carrying out ablation catheter treatment in cardiac ablation artIn, and contact distal end of catheter with wall of the heart, in the process it is generally important that making the good contact heart in the distal end of conduitDirty inner wall, otherwise, excessive pressure may cause to the worthless damage of heart tissue or even heart wall perforation, and too small pressurePower is then unable to reach the therapeutic purposes thoroughly melted.
In the present solution, so, it is possible basis at least provided with two foil gauges to misplace along its circumferencial direction in working endThe stress value that all foil gauges measure determines the stress at conduit patch foil gauge, and the stress value that all foil gauges are measured is as oneGroup stress data group, in this way, conduit stress is different, guiding-tube bend radian is different, and stress data group is also just different, that is to say, thatStress data group and conduit stress value are one-to-one relationships.
When implementing this programme, stress data group of the conduit in various pressure and various bending directions is obtained first, oftenGroup stress data includes the stress value composition of all foil gauges, containing positive and negative, is organized into number by corresponding relationship for obtain dataIn a device according to library storage, in the database according to stress data group when measuring conduit stress, bending direction and crooked radianIt searches, according to uniqueness, one group of stress data group can only find a corresponding power, bending direction and arc of curvature in the databaseSpend it is matching, in this way, can be realized as catheter pressure, bending direction and crooked radian accurately measure, can determine conduitIt is whether suitable with the contact pressure of wall of the heart, it can more easily control ablation effect.
Preferably, the tube body includes the insulating element that the tube body end is arranged in, the conductive component setting existsOn the insulating element, make the conductive component mutually insulated, in this way, mutually insulated between each conductive component, it can be preferablyIt is melted, ablation effect is more preferable.
Particularly, the insulating element is cylindrical shape, and such structure is simple, and processing is more convenient, and manufacturing cost is low.Also,Eliminating medicine liquid is transmitted to tissue by the cylindrical vent of the insulating element, in this way, eliminating medicine liquid implantation is at the center of ablationRegion can obtain better ablation effect, and the conductive component is arranged in the exterior lateral sides of the insulating element, in this way,Conductive component is stronger more in conjunction with tube body, has a safety feature, and the conductive component is enable to contact tissue.
Preferably, the projection line of the tube body is arranged in the solution cavity on the perspective plane perpendicular to tube body axisCenter, in this way, eliminating medicine liquid implantation in the central area of ablation, better ablation effect, good cooling results can be obtained.
Preferably, the projection line of the tube body is circle on the perspective plane perpendicular to tube body axis, the tube body projectionOuter 1/3 radius region of line is provided with the solution cavity, in this way, the area of eliminating medicine liquid covering is big, ablation effect is good, cooling effectIt is good.
Preferably, the conductive component is electrode, in this way, ablation effect is more preferable, more particularly, the raw material of electrode areThe good heat conductivity of stainless steel or platinumiridio, stainless steel or platinumiridio so, it is possible quickly to pass the heat of ablation tissueIt is handed to temperature-detecting device, can more quickly monitor the temperature of ablation tissue, much sooner, ablation effect is good for monitoring.
Preferably, the tube body protrudes into the end setting elastic member of human body, at least two foil gauge settingsOn the elastic component, particularly, the elastic component shape is cuboid, also, four rib quilts of its length directionCorners, the elastic component raw material are stainless steel or Nitinol, so, it is possible to allow conduit bend by pressure and in stressNature can be quickly back to after removal, meanwhile, it is capable to make conduit deflection under identical stress condition bigger, Neng GourangThe strain built-in testing being arranged on elastic component is sensitiveer reliable, so, it is possible to be determined more accurately in conduit and heartWhether the contact pressure of wall is suitable.
The elastic component shape is vertical prismatic shape, so, it is possible more convenient foil gauge to be fitted in elastic componentOn side, further, incline can be by fillet；Certainly, the shape of elastic component is also possible to cylindrical shape, that is to say, that bulletProperty component can be rod-shaped or column, so, it is possible to facilitate processing and conveniently be cooperated with conduit.
Elastic component is made of stainless steel, mainly considers its low raw-material cost, and the elastic component tool after being madeThere is favorable elasticity, can satisfy the primary demand of stress test；Further, elastic component is made of Nitinol, NiTiAlloy is a kind of marmem, the plastic deformation of itself can be automatically restored to original-shape under a certain specific temperatureSpecial alloy, the expansion and contraction of Nitinol is 20% or more, and fatigue life, damping characteristic was higher than common spring by 10 up to 10,000,000Times, corrosion resistance is better than many medical stainless steels, has elasticity well, so, it is possible to further enhance elastic componentElasticity increases the sensitivity of foil gauge dynamometry, makes the measurement of power and bending direction more accurate.
Preferably, at least two adjacent foil gauges are corresponded to and are provided between the region of elastic component along the pipeThe through slot of body radial direction perforation, so, it is possible the elasticity for further increasing elastic component, in the case where stress is constant, phaseThan having the elastic component deformation amount of through slot bigger in the elastic component of not through slot, the numerical value of foil gauge measurement is bigger, Neng GourangThe strain built-in testing being arranged on elastic component is sensitiveer reliable, so, it is possible that ablation catheter and the heart is determined more accuratelyWhether the contact pressure of dirty inner wall is suitable.
Preferably, the elastic component shape is vertical prismatic shape, the side of at least one elastic component is provided withThe through slot, on the section perpendicular to the elastic component incline, the size of the through slot is equal to the elastic componentThe size of side, the foil gauge are arranged on the not ipsilateral of the elastic component, so, it is possible to allow conduit in identical stressIn the case of deflection it is bigger, the strain built-in testing being arranged on elastic component can be allowed sensitiveer reliable, so, it is possible moreAccurately determine whether the contact pressure of conduit and wall of the heart is suitable, particularly, the incline setting of the elastic component isThrough slot is stated, so, it is possible the deflection for further increasing elastic component.
Preferably, the elastic component is wrapped with flexible pipe body, that is to say, that elastic component is arranged in flexible pipe bodyInner cavity in, including the foil gauge and elastic sheet being arranged on elastic component, in this way, foil gauge is isolated with tissue,Safety and the operating performance of the ablation catheter can be enhanced.
Preferably, the foil gauge is each equipped with secondary foil gauge, the pair foil gauge is to eliminate the foil gaugeTemperature error, the temperature error of foil gauge, which is primarily due to temperature, to generate additional strain to working strain gauge, make test with it is trueThere are errors between value, and therefore, it is necessary to increase secondary foil gauge, the foil gauge attachment for test force, the nearlyr effect in position is arranged inFruit is better.
Preferably, being provided with Magnetic Sensor on the elastic component, the Magnetic Sensor is arranged in magnetic field, in this way,It can accurately determine conduit in the specific location of heart, can accurately determine whether the location of conduit is set ablation positionIt sets, so, it is possible to further enhance the ablation effect for carrying out ablative surgery using the conduit.
Preferably, the projection line of the tube body is circle on the perspective plane perpendicular to tube body axis, the tube body projectionThe center of line is provided with a conductive component, and particularly, the conductive component is provided with the solution hole, the conductive component itBetween mutually insulated, in this way, eliminating medicine liquid implantation in the central area of ablation, better ablation effect, good cooling results can be obtained.
Preferably, the projection line of the tube body is circle on the perspective plane perpendicular to tube body axis, the tube body projectionOuter 1/3 radius region of line is provided with the solution hole, in this way, the area of eliminating medicine liquid covering is big, ablation effect is good, cooling effectIt is good.
Preferably, the ablation catheter further includes the human body by monitoring the set ablation of conductive component temperature monitoringThe temperature-detecting device of tissue temperature, conductive component are contacted with tissue, and the temperature of ablation site is transferred to conduction when ablationComponent, particularly, the temperature-detecting device include temperature sensor, in this way, can be supervised by the temperature of monitoring conductive componentThe temperature of ablation tissue is surveyed, in this way, ablation safety, effect is good, and doctor can be facilitated to carry out ablative surgery.
The ablating device further includes the radio-frequency apparatus and back pole plate for generating radio-frequency current, and the radio-frequency apparatus hasTwo electrodes, respectively electrode first and electrode second, at least one described conductive component are electrically connected with the electrode first, at least oneThe conductive component is electrically connected with the electrode second, can carry out radiofrequency supplier electric current for ablation catheter.
Preferably, the ablating device further includes back pole plate, the back pole plate is electrically connected with the electrode first/electrode secondIt connects, so, it is possible to carry out longitudinal heating while carrying out Transverse Heated to tissue by radio-frequency current, guaranteeing to meltAblation area can be expanded in the case where depth, quickly melt the lesion tissue of large area, save the ablative surgery time, raising disappearsMelt efficiency, so as to mitigate patient's pain, reduces operation risk.
In conclusion by adopting the above-described technical solution, the beneficial effect of the application is:
1, ablation area is bigger: prior art ablation is only perpendicular to longitudinal heating of human tissue surface, can haveCertain depth of ablation, but ablation area is smaller, the application can carry out Transverse Heated, therefore ablting surface to body tissue surfaceProduct is big；
2, can stimulate the disease of certain intermittent attacks to help to find lesion tissue: the ablation of the prior art is ledPipe is difficult to find lesion tissue in such a way that radio-frequency current stimulates, because the tissue range between two electrodes is too big,Two conductive components for applying electric current to tissue are arranged on ablation catheter by the application, the tissue that electric current passes throughArea is small, is easy the accurate specific location for determining lesion tissue；
3, ablation area is big, and ablation is high-efficient, can reduce patient's pain, reduces operation risk.
4, there is mapping and ablation functionality simultaneously.
5, easy to operate: operator can be disappeared in operation by only needing one hand of a people that can control simultaneouslyMelt conduit and guide wire, ablative surgery operation can be made simpler, saves manpower, and mitigate patient suffering.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the application ablation catheter；
Fig. 2 is A-A sectional view in Fig. 1；
Fig. 3 is the structure composition figure of the application；
Fig. 4 is the elastic component schematic diagram of the application；
Fig. 5 is the elastic component schematic diagram of the application；
Fig. 6 is the ablation schematic diagram of ablation catheter；
Fig. 7 is the structural schematic diagram of the application；
Fig. 8 is the assembling schematic diagram of ablation catheter and guide wire；
Fig. 9 is the assembling schematic diagram of ablation catheter and guide wire.
Marked in the figure: 1- first electrode, 2- second electrode, 3- third electrode, 4- intrusion pipe, 5- temperature sensor, 6- pipeBody, 61- solution cavity, 7- elastic component, 71- through slot, 8- ring electrode, 9- foil gauge, 11- tissue, 12- first electrode are ledLine, 13- second electrode conducting wire, 14- ablation catheter, 15- guide wire, 16- guide wire knob, 17- ablation catheter push button, the Shandong 18-That connector, 19- connector.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, rightThe present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, notFor limiting the present invention.
As shown in figure 1-9, a kind of large area discharge ablating device, including the ablation catheter 14 for ablation and for leadingDraw the guide wire 15 of 14 pointing direction of ablation catheter, ablation catheter 14 is slidably arranged in the inner cavity of guide wire 15, guide wire 15Including the guiding handle 161 convenient for people's operation, guiding handle 161 includes guide wire knob 16, and ablation catheter 14 includes being convenient for peopleThe ablation handle 141 of operation, ablation handle 141 are slidably arranged on guiding handle 161, and ablation handle 141 includes ablation catheterPush button 17, as shown in Fig. 7,8 and Fig. 9, the ablation catheter push button 17 of ablation handle 141 is set on guiding handle 161, and sliding disappearsMelting conduit push button 17, ablation catheter 14 can be slided with respect to guide wire 15, and ablation catheter 14 stretches in the inner cavity of guide wire 15,Rotation guide wire knob 16 can change the bending direction and crooked radian of guide wire, as shown in Figure 8.
Ablation catheter 14 includes tube body 6, and tube body 6 includes that the elastic component 7 that tube body 6 protrudes into human body end is arranged in, elasticity7 shape of component is square prism, and measurement elastic component 7 is separately provided on three sides of elastic component 7 and is pressurizedThree foil gauges 9 of power size are provided with along 6 radial direction of tube body in elastic component 7 on the side for being not provided with foil gauge 9The through slot 71 of perforation, also, on the section perpendicular to 7 incline of elastic component, elastic component 7 described in the size of through slot 71The size of side, as shown in figure 4, also, through slot 71 is additionally provided on the incline of elastic component 7, as shown in figure 5, being capable of rootThe stress at conduit patch foil gauge 9, the stress value that all foil gauges 9 are measured are determined according to the stress value that all foil gauges 9 measureAs one group of stress data group, in this way, conduit stress is different, guiding-tube bend radian is different, and stress data group is also just different, alsoIt is to say, stress data group and conduit stress value are one-to-one relationships.
When implementing this programme, stress data group of the conduit in various pressure and various bending directions is obtained first, oftenGroup stress data includes the stress value composition of all foil gauges 9, containing positive and negative, is organized into number by corresponding relationship for obtain dataIn a device according to library storage, in the database according to stress data group when measuring conduit stress, bending direction and crooked radianIt searches, according to uniqueness, one group of stress data group can only find a corresponding power, bending direction and arc of curvature in the databaseSpend it is matching, in this way, can be realized as catheter pressure, bending direction and crooked radian accurately measure, can determine conduitIt is whether suitable with the contact pressure of wall of the heart, it can more easily control ablation effect.
Elastic component 7 is made of stainless steel, mainly considers its low raw-material cost, and the elastic component 7 after being madeWith favorable elasticity, the primary demand of stress test can satisfy；Further, elastic component 7 is made of Nitinol, nickelTitanium alloy is a kind of marmem, the plastic deformation of itself can be automatically restored to original-shape under a certain specific temperatureSpecial alloy, the expansion and contraction of Nitinol is 20% or more, and fatigue life, damping characteristic was higher than common spring up to 10,000,00010 times, corrosion resistance is better than many medical stainless steels, has elasticity well, so, it is possible to further enhance elastic component 7Elasticity, increase by 9 dynamometry of foil gauge sensitivity, make the measurement of power and bending direction more accurate.
Foil gauge 9 is each equipped with secondary foil gauge 9, temperature error of the secondary foil gauge 9 to eliminate foil gauge 9, foil gauge 9Temperature error, which is primarily due to temperature, to generate additional strain to working strain gauge 9, make between test and true value there are error, becauseThis, needs to increase secondary foil gauge 9, and 9 attachment of foil gauge for test force is arranged in, and the nearlyr effect in position is better.
Magnetic Sensor is provided on elastic component 7, Magnetic Sensor is arranged in magnetic field, so, it is possible accurately to determine conduitIn the specific location of heart, can accurately determine whether the location of conduit is set ablation locations, be so, it is possible into oneStep enhancing carries out the ablation effect of ablative surgery using conduit, is disposed with ring electrode 8 on tube body 6, is used for Electrophysiological mapping, canKeep positioning more accurate.
The end that tube body 6 protrudes into human body is also set up there are two for conductive conductive component, and conductive component is electrode, respectivelyFor first electrode 1 and second electrode 23, after so that conductive component is connected radio-frequency current, after so that electrode is connected radio-frequency current, radio frequency electricalStream successively forms a closed circuit by first electrode 1, tissue 11 and second electrode 2, and tube body 6 includes being arranged in tube bodyThe insulating component 3 of 6 ends, insulating component 3 are cylindrical shape, and first electrode 1 and second electrode 2 are arranged at the outer of insulating component 3On cylindrical surface, tube body 6 includes the solution cavity 61 for being used for transmission eliminating medicine liquid, and insulating component center through hole is also one of solution cavity 61Point, and the radial through-hole of insulating component 3 is also a part of solution cavity 61, and eliminating medicine liquid is enable to pass through solution cavity 61 and solution cavity 61Enough it is transmitted to the tissue 11 of set ablation.
Existing ablation techniques paste back pole plate in human skin tissue, need the tissue surface melted placement to disappear in inside of human bodyMelt conduit, radio-frequency current is transmitted to by tissue 11 by ablation catheter and back pole plate, quite in the interior table of tissue 11Face and outer surface apply electric current, and current direction heats direction and be also perpendicular to tissue 11 perpendicular to 11 surface of tissueSurface, therefore, certain depth can be melted, still, be heated due to being only perpendicular to human body surface, be only longitudinal addHeat lacks Transverse Heated source, and the transverse direction on 11 surface of tissue is heated by heat transfer, therefore, Transverse Heated areaDomain is small, and ablation area is small.
The transmission of tissue 11 is penetrated by the way that three electrodes are arranged on ablation catheter, and using the electrode on ablation catheterFrequency electric current, radio-frequency current successively passes through an electrode, tissue 11 and other electrodes and forms closed circuit, and at least forms oneA closed circuit, that is, there are three electrodes to contact tissue 11 when being powered, in this way, being exactly the transverse direction in tissue 11It is heated, compared to existing longitudinal heating, heating surface (area) (HS increases, and can quickly melt the lesion tissue of large area, saveThe ablative surgery time improves ablation efficiency, so as to mitigate patient's pain, reduces operation risk.
In addition, clinically certain cases are intermittent breaking-outs, therefore need to carry out Induced by Stimulation disease in treatment, disappearingTo be exactly found lesions position when melting treatment, but currently, searching for this kind of lesion tissue, needs in seizure of diseaseIt can accurately be positioned, still, this kind of intermittence disease, disease time is difficult to control, mostly with drug-induced, increase diseasePeople's pain, although can be induced an illness by the way of electric shock, there is no relevant devices for existing medical instrument, also,It is difficult to carry out induction stimulation using the ablation catheter in existing ablation techniques, because electric current is transmitted to ablation catheter by back pole plate11 area of tissue passed through is too big, even if disease is induced, it is also difficult to which the concrete position for determining lesion tissue is faced at presentThere is no induce to find lesion tissue using this direction for bed.And it is arranged to three electrodes that tissue 11 applies electric currentOn ablation catheter, 11 area of tissue that electric current passes through is small, is easy the accurate specific location for determining lesion tissue, therefore, energyIt enough induces an illness and helps to find lesion tissue, can more quickly and accurately determine the position of lesion tissue, can save and disappearMelt operating time, improve ablation efficiency, so as to mitigate patient's pain, reduces operation risk.
In addition, three electrodes are arranged directly on ablation catheter, may not need back pole plate when being melted, three electrodes withTissue 11 contact after, by be arranged in supravasal electrode by radio-frequency current be transmitted to tissue 11 to be ablated toIt is melted, may not need back pole plate when being melted, so that device is simpler.
On the perspective plane perpendicular to 6 axis of tube body, the projection line of tube body 6 is circle, and the center setting of 6 projection line of tube body is exhaustedEdge component 3, particularly, the medium pore canal that insulating component 3 is arranged are solution cavity 61, between first electrode 1 and second electrode 2 mutuallyInsulation, in this way, eliminating medicine liquid implantation can obtain better ablation effect, good cooling results in the central area of ablation.
Particularly, insulating component 3 is cylindrical shape, and such structure is simple, and processing is more convenient, and manufacturing cost is low.Also, it meltsLiquid is transmitted to tissue 11 by the solution cavity 61 of insulating component 3, in this way, eliminating medicine liquid implantation is in the central area of ablation, energyBetter ablation effect is enough obtained, first electrode 1 and second electrode 2 are arranged in the exterior lateral sides of insulating component 3, in this way,Each electrode is more combined with tube body 6 stronger, is had a safety feature, and so that electrode is contacted tissue 11, also, moltenThe center of the projection line of tube body 6 is arranged in sap cavity 61, in this way, eliminating medicine liquid implantation in the central area of ablation, can obtain more preferableAblation effect, good cooling results.
Alternatively, the projection line of tube body 6 is circle on the perspective plane perpendicular to 6 axis of tube body, solution cavity 61 is arranged in tube bodyOuter 1/3 radius region of 6 projection lines, in this way, the area of eliminating medicine liquid covering is big, ablation effect is good, good cooling results.
Ablation catheter further includes the temperature sensing for monitoring 11 temperature of tissue of set ablation by monitoring electrode temperatureDevice 5, electrode are contacted with tissue 11, and the temperature of ablation site is transferred to electrode when ablation, in this way, passing through the temperature of monitoring electrodeDegree can monitor the temperature of ablation tissue, in this way, ablation safety, effect is good, and doctor can be facilitated to carry out ablative surgery.
The raw material of electrode are stainless steel or platinumiridio, and the good heat conductivity of stainless steel or platinumiridio so, it is possibleQuickly by the heat transfer of ablation tissue to temperature sensor 5, the temperature of ablation tissue can be more quickly monitored, monitoring is moreAdd in time, ablation effect is good.
Ablating device further includes the radio-frequency apparatus and back pole plate for generating radio-frequency current, and there are two electricity for radio-frequency apparatus toolPole, respectively electrode first and electrode second, first electrode 1 are electrically connected with electrode first, and second electrode 2 is electrically connected with electrode second, in this way,Radiofrequency supplier electric current can be carried out for ablation catheter.
Ablating device further includes back pole plate, and back pole plate is electrically connected with electrode first or electrode second, in this way, can make to be arranged in pipeA part of electrode of body 6 discharges to back pole plate, and a part of electrode mutually discharges, and so, it is possible passing through radio-frequency current to human bodyTissue 11 carries out carrying out longitudinal heating while Transverse Heated, can expand ablation area in the case where guaranteeing depth of ablation,The quickly lesion tissue of ablation large area, saves the ablative surgery time, improves ablation efficiency, so as to mitigate patient's pain,Reduce operation risk.
As shown in FIG. 7 and 8, the radial dimension that ablation catheter 14 protrudes into the end of human body is less than or equal to the guide wire 15The radial dimension of inner cavity, that is to say, that shape is that the outer diameter of cylindrical ablation catheter 14 is less than or equal to guiding tube cavityDiameter, guide wire cavity shape are cylinder, and so, it is possible, which makes ablation catheter reach more tiny tissue, disappearsMelt.
Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included inWithin protection scope of the present invention.