A kind of ablation catheter with pressure detecting functionTechnical field
The present invention relates to ablation catheter field, in particular to a kind of ablation catheter with high-precision pressure detection function withAnd the dependency structure including this ablation catheter.
Background technique
Arrhythmia cordis is common one of the heart disease in the world, and clinically application catheter progress radio-frequency ablation procedure is answered extensivelyFor treating such disease, when radio-frequency ablation procedure carries out, RF energy passes through conduit to electrode and the portion of electrode contactPosition and surrounding myocardium tissue are to melt.
It is only melted under the conditions of the contact pressure of the electrode of distal end of catheter and cardiac muscular tissue is suitable by clinic confirmationIt can be only achieved preferable therapeutic effect.Specifically, being to insert the catheter into heart, and keep conduit remote in ablation catheter treatmentEnd contacted with wall of the heart, in the process it is generally important that make the distal end of conduit with suitably contact with pressure wall of the heart withAnd determine correctly recline direction and position, otherwise, excessive pressure or the incorrect position that reclines may cause to heart groupWorthless damage, or even heart wall perforation are knitted, while the size of contact pressure is similarly most important to the accurate positioning of conduit.
In the prior art, there are many modes for measuring this contact pressure, is wherein one in distal end of catheter setting strain gaugeKind mode.
However in this strain gauge mode of the prior art is implemented, (the head end electrode of conduit passes through elastomer to elastomerIt is mounted on tube body, after head end electrode contacts tissue, further presses tissue under force, and elastomer existsThen be bent during this) the bad control of elasticity modulus, if very big, the deformation of elastomer is relatively difficult, becomesShape amount is too small, so that strain gauge is reflected, the value is too small or missing, keeps the detection effect of pressure bad, answers simultaneouslyBecoming the measured numerical value of meter can also cooperate with rear alignment device, the position of measurement conduit head end and bending direction and angleDegree, if strain gauge is reflected, the value is too small or missing, can also have an impact to the accurate positioning of conduit；
But on the contrary, the deformation of elastomer is opposite to be easier to, deformation if the elasticity modulus of elastomer is very smallAmount becomes larger, and the numerical value that strain gauge is reflected is sufficiently large obvious enough, and the detection effect of pressure is fine, but have one it is seriousThe problem of be exactly such elastomer too " soft " so that it is too flexible and when being unable to reach ablation to organizational stress mostGood state is inadequate with the pressure that reclines of tissue.
So in the prior art, there are many scheme when each producer uses strain gauge dynamometry, having using complete elastomerThen structure is arranged multiple strain gauges on elastomer to measure, such as the CN102160909B patent of Johnson & Johnson, equally depositsIn our above-mentioned problems；
Secondly, also have using incomplete elastomer structure (such as engraved structure), the elasticity of Lai Zengjia elastomer, it is such as minimally invasiveCN201610651602 patent, it still can have the above problem, although the deformation quantity of elastomer is bigger, for singleStrain gauge measurement it is more helpful, but the reduction of elastomeric resilient modulus has a lower limit always, there can be no it is above-mentioned tooThe problem of " soft ", then opposite, the measurement effect of strain gauge also has a upper limit, and current this mode still can exist and answerChange meter is reflected, and the value is too small or the influential situation of accurate positioning of missing and conduit, meanwhile, this structureIn actual use, after being bent certain number, it is also easy to produce fatigue, the measurement of strain gauge can be very inaccurate at that time, influences to surveyDose-effect fruit.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of the prior art, it is more accurate to provide a kind of pressure detectingAblation catheter, and the dependency structure comprising this ablation catheter.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of ablation catheter of pressure detecting, the distal end of the ablation catheter include elastomer and pressure sensor, the bulletProperty body be hollow out tubular structure, the elastomer includes A sections and B sections, and the hollow out that end extends to B sections is provided in the A sectionStructure (increases elasticity), and the handover region of A sections He B sections is arranged in the pressure sensor；
As described in the background art, in the prior art, elastomer or elasticity modulus are too big, deform in the case where by pressureAmount is too small, so that pressure sensor (strain gauge described in background technology is one of) is reflected, the value is too smallOr missing, keep the detection effect of pressure bad, while numerical value measured by strain gauge can also be with rear alignment device phase interworkingClose, measure position and bending direction and the angle of conduit head end, if pressure sensor reflected that the value is too small orPerson's missing, then can also have an impact to the accurate positioning of conduit；
Or the elasticity modulus of elastomer is too small, then deformation is opposite is easier to, and deflection becomes larger, pressure sensor instituteThe numerical value reflected is sufficiently large obvious enough, and the detection effect of pressure is fine, but has a serious problem to be exactly, suchElastomer too " soft ", so that too flexible and when being unable to reach ablation the optimum state to organizational stress, the patch with tissueDepended on pressure is inadequate；
And we use A sections and B sections of structure, only order here one of two-stage structure on elastomer for A sections and B sectionsName, elastomer include at least this two sections, and two sections of restriction simply facilitates differentiation, are not necessarily two-stage structure and separately form, thanSuch as A sections and B sections integrated moldings, we can also limit the section of elastomer different location with " A sections " and " B sections "；
Since we can not find, and a deflection is suitable under existing background, makes the use of elastomer while meetingCertain keeps pressure sensor measurement more acurrate the pressure of tissue and certain deformability, then we just change a think ofElastomer is clearly divided into A sections and B sections in road, and in A section setting increase elasticity and end extend to B sections of hollow out knotStructure, the handover regions of A sections and B section is then arranged in the pressure sensor, and (A section and B sections of junctions are a ring-type or ring-type clothThe structure set, handover region are then limited to the region that this junction is respectively sandwiched to the centre that two sides extend one section), then,On elastomer in (at least A sections and B sections of parts), it must be in handover region, due to A sections that affected by force, which deforms maximum region,The elasticity of elastomer is by engraved structure amplification and engraved structure is connected to B sections, then the deformation of handover region is then relative to existingThe deformation of complete elastomer structure in technology is the performance of an amplification, meanwhile, and be unlikely to whole and hollow out knot is all setStructure and cause elasticity too it is big occur the problems in background technique (with tissue recline not enough and On The Yielding), one can be reachedPreferable balance, keeps entire elastomer in use, and elasticity is suitable, can achieve the best shape to organizational stress when ablationState, it is enough big with the pressure that reclines of tissue, and also the deflection of handover region is enough big, and the numerical value that pressure sensor is reflected is moreGreatly, the detection effect of pressure is more preferable, while measured numerical value can also cooperate with rear alignment device, measures conduit head endPosition and bending direction and angle, the numerical value that pressure sensor is reflected is bigger, then to the accurate positioning of conduitMore preferably.
As a preferred solution of the present invention, the engraved structure includes several mutually indepedent settings and hollow-out part is continuousHollow slots, the continuous engraved structure of hollow-out part can make opposite B sections of the deformation of A section by the elastomer of pressure bigger, togetherWhen handover region deflection it is also bigger, and continuous hollow slots that several are arranged independently of each other are necessarily arranged side by side,Such structure can make have one between A sections of adjacent engraved structures again in the case where guaranteeing the A sections of better situations of elastomeric resilientThe state mutually restricted, being unlikely to bending excessively causes the pressure that reclines to tissue inadequate.
As a preferred solution of the present invention, the single hollow slots arrange that helical structure can make A sections in the shape of a spiralElasticity advanced optimizes, under the premise of " several are arranged independently of each other and the continuous hollow slots of hollow-out part ", helical structureIt can preferably make A sections and B sections of handover region deflection bigger, while " A sections of adjacent engraved structures can be better achievedBetween have the state mutually restricted, be unlikely to that bending is excessive to cause the pressure that reclines to tissue inadequate " (for example continuously engraveThe setting path of empty slot is not the arc-shaped of a smooth transition, after such structure is arranged side by side, in helical structure, mutuallyConfinement effect become apparent from, often A sections bend to a degree after, curved difficulty can become larger, and guarantee to the pressure that reclines of tissuePower).
As a preferred solution of the present invention, the elastomer is the tubular structure or circular tube structure of hollow out, all institutesThe shape for stating hollow slots is identical, keeps A sections of deformation more controllable, if it is in the case where hollow slots are helical structure, then AThe distortional elastomer effect of section is more preferable, while the stress distribution of handover region is also more evenly, is more convenient measurement.
As a preferred solution of the present invention, described A sections and B sections of handover region part is divided equally by several engraved structuresFor several sections of linkage sections arranged with elastomer central axis circumference array, when single engraved structure extends to B sections of edges, thenProlong and radially extend a segment length, then the area of handover region is then smaller, then under same pressure condition, the stress of handover region is justIt more concentrates, deflection is just bigger, and numerical value measured by pressure sensor is just bigger more acurrate, and measurement effect is more preferable.
As a preferred solution of the present invention, the pressure sensor is fitted on the linkage section and sensor both ends are distinguishedA sections and B sections of connection, above-mentioned to mention, the set-up mode of linkage section can be such that the stress of handover region more concentrates, and deflection is bigger,Pressure sensor is arranged on linkage section, then can effectively measure the deformation of linkage section, measurement effect is more preferable.
As a preferred solution of the present invention, the pressure sensor is foil gauge.
As a preferred solution of the present invention, the head end electrode is provided with multiple fill orifices.
As a preferred solution of the present invention, further include: head end electrode, the head end electrode are connected to the elastomer oneEnd；
In the distal structure comprising head end electrode, elastomer is clearly divided into A sections and B sections, and is arranged in A section and increasesAdd elasticity and end extend to B sections of engraved structure, the handover region (A of A sections He B sections is then arranged in the pressure sensorSection and B sections of junctions are the structure of a ring-type or annular configuration, and handover region is then limited to this junction and respectively prolongs to two sidesStretch the region that one section of centre is sandwiched), then, on elastomer in (at least A sections and B sections of parts), affected by force is deformed mostBig region must be in handover region, since the elasticity of A section of elastomers is amplified and engraved structure is connected to B by engraved structureSection, then handover region deformation then compared with the existing technology in complete elastomer structure deformation be one amplification tableIt is existing, meanwhile, and be unlikely to whole and all engraved structure is set and leads to that elasticity is too big the problems in background technique occurs, one can be reachedA preferable balance, keeps entire elastomer in use, and elasticity is suitable, can achieve the best shape to organizational stress when ablationState, it is enough big with the pressure that reclines of tissue, and also the deflection of handover region is enough big, and the numerical value that pressure sensor is reflected is moreGreatly, the detection effect of pressure is more preferable, while measured numerical value can also cooperate with rear alignment device, measures conduit head endPosition and bending direction and angle, the numerical value that pressure sensor is reflected is bigger, then to the accurate positioning of conduitMore preferably.
As a preferred solution of the present invention, it is mutually not flat that at least two axis are provided in the elastomer or head end electrodeCapable Magnetic Sensor, is provided with magnetic field generator outside Magnetic Sensor, and magnetic field generator can emit multiple magnetic fields, Magnetic SensorOn can generate induced current, handled into controller to obtain Magnetic Sensor in the position in magnetic field, radiation by conducting wire feedbackA magnetic field be a plane spatially, induced electricity flow valuve size can determine that the magnetic to Magnetic Sensor on this planeThe position of sensor on this plane, multiple magnetic fields, that is, multiple plane convergences can determine that Magnetic Sensor spatially specific positionIt sets, when 2 or more Magnetic Sensors, the fixed relative position of Magnetic Sensor and angle, the space coordinate of the two is regarded as oneNew coordinate (x1, y1, z1, x2, y2, z2), when tube body rotation, this coordinate has uniqueness, therefore can accurately determine conduitPosition and rotational angle, then the pressure sensor on elastomer is cooperated (to obtain the bending angle and head end of entire elastomerThe relative position of electrode and elastomer bottom), so that conduit is more accurately found lesion tissue and ablation head in ablationThe direction that reclines at end.
As a preferred solution of the present invention, further include: head end electrode and catheter tube, the head end electrode are connected toDescribed elastomer one end, one end of the relatively described head end electrode is connected to one end of the catheter tube on the elastomer；
In the ablation catheter comprising head end electrode and catheter tube, elastomer is clearly divided into A sections and B sections, and AIn section setting increase elasticity and end extend to B section of engraved structure, the pressure sensor is then arranged in A sections and B sections(A sections are then limited to this junction with B sections of junctions for a ring-type or the structure of annular configuration, handover region to handover regionThe region respectively sandwiched to the centre that two sides extend one section), then, on elastomer in (at least A sections and B sections of parts), by stressInfluencing deformation maximum region must be in handover region, since the elasticity of A sections of elastomers is by engraved structure amplification and hollow out knotStructure is connected to B sections, then the deformation of handover region then compared with the existing technology in the deformation of complete elastomer structure be oneThe performance of a amplification, meanwhile, and be unlikely to whole and all engraved structure is set and causes elasticity is too big asking in background technique occurTopic can reach a preferable balance, keep entire elastomer in use, and elasticity is suitable, when can achieve ablation to tissueThe optimum state of pressure, it is enough big with the pressure that reclines of tissue, and also the deflection of handover region is enough big, and pressure sensor is reflectedNumerical value out is bigger, and the detection effect of pressure is more preferable, while measured numerical value can also cooperate with rear alignment device,The position of measurement conduit head end and bending direction and angle, the numerical value that pressure sensor is reflected is bigger, then to conduitAccurate positioning it is also more preferable.
Preferably, it is provided with what at least two axis were not parallel to each other in the elastomer, head end electrode or catheter tubeMagnetic Sensor, is provided with magnetic field generator outside Magnetic Sensor, and magnetic field generator can emit multiple magnetic fields, energy on Magnetic SensorInduced current is generated, is handled into controller to obtain Magnetic Sensor in the position in magnetic field by conducting wire feedback, the one of radiationA magnetic field is a plane spatially, and induced electricity flow valuve size can determine that the magnetic senses to Magnetic Sensor on this planeThe position of device on this plane, multiple magnetic fields, that is, multiple plane convergences can determine that Magnetic Sensor spatially specific location, when 2A or above Magnetic Sensor, the fixed relative position of Magnetic Sensor and angle, is regarded as a new coordinate for the space coordinate of the two(x1, y1, z1, x2, y2, z2), when tube body rotation, this coordinate has uniqueness, therefore can accurately determine the position of conduitAnd rotational angle, then cooperate on elastomer pressure sensor (obtain entire elastomer bending angle and head end electrode andThe relative position of elastomer bottom), so that conduit is more accurately found lesion tissue in ablation and is melted the patch of head endBy direction.
The invention also discloses a kind of ablating devices with pressure detecting function comprising: head end electrode, catheter tubeBody, rear end equipment and the elastomer and pressure sensor, the head end electrode is connected to described elastomer one end, describedOne end of the relatively described head end electrode is connected to one end of the catheter tube, relative resilient on the catheter tube on elastomerOne end of body is connected in the rear end equipment, in whole ablating device, elastomer is clearly divided into A sections and BSection, and in A section setting increase elasticity and end extend to B sections of engraved structure, the pressure sensor be then arranged A sections with(A sections are then limited to this company with B sections of junctions for a ring-type or the structure of annular configuration, handover region to B sections of handover regionThe region that each centre for extending one section to two sides in the place of connecing is sandwiched), then, on elastomer in (at least A sections and B sections of parts), byStress influence deformation maximum region must be in handover region, since the elasticity of A sections of elastomers is amplified and engraved by engraved structureHollow structure is connected to B sections, then handover region deformation then compared with the existing technology in complete elastomer structure deformationIt is the performance of an amplification, meanwhile, and be unlikely to whole and all engraved structure is set and causes elasticity is too big to occur in background techniqueThe problem of, a preferable balance can be reached, keep entire elastomer in use, elasticity is suitable, can achieve pair when ablationThe optimum state of organizational stress, it is enough big with the pressure that reclines of tissue, and also the deflection of handover region reaches big, pressure sensor instituteThe numerical value reflected is bigger, and the detection effect of pressure is more preferable, while measured numerical value can also be mutual with rear alignment deviceCooperation, the position of measurement conduit head end and bending direction and angle, the numerical value that pressure sensor is reflected is bigger, then rightThe accurate positioning of conduit is also more preferable.
Compared with prior art, beneficial effects of the present invention:
Elastomer is clearly divided into A sections and B sections, and in A section setting increase elasticity and end extend to B sections and engraveHollow structure, the handover regions of A sections and B section is then arranged in the pressure sensor, and (A section are a ring-type or ring with B sections of junctionsThe structure of shape arrangement, handover region are then limited to the region that this junction is respectively sandwiched to the centre that two sides extend one section), that, on elastomer in (at least A sections and B section parts), affected by force deformation maximum region must be in handover region, due to ASection elastomer elasticity by engraved structure amplification and engraved structure be connected to B sections, then the deformation of handover region then relative toThe deformation of complete elastomer structure in the prior art is the performance of an amplification, meanwhile, and be unlikely to whole all settings and engraveHollow structure and lead to that elasticity is too big the problems in background technique occurs, a preferable balance can be reached, entire elastomer is made to existIn use, elasticity is suitable, the optimum state to organizational stress when ablation can achieve, it is enough big with the pressure that reclines of tissue, andAnd the deflection of handover region is enough big, the numerical value that pressure sensor is reflected is bigger, and the detection effect of pressure is more preferable, simultaneouslyMeasured numerical value can also cooperate with rear alignment device, measure position and bending direction and the angle of conduit head end,The numerical value that pressure sensor is reflected is bigger, then also more preferable to the accurate positioning of conduit.
Detailed description of the invention:
Fig. 1 is the ablation schematic diagram of the embodiment of the present application 1；
Fig. 2 .1 is the external structure schematic diagram (multiple fill orifices) of the ablation catheter distal structure of the embodiment of the present application 1；
Fig. 2 .2 is external structure schematic diagram (multiple fine perfusions of the ablation catheter distal structure of the embodiment of the present application 1Hole)；
Fig. 3 is the cross-sectional view of the ablation catheter distal structure of the embodiment of the present application 1；
Fig. 4 is the axonometric drawing of the ablation catheter distal structure of the embodiment of the present application 1；
Fig. 5 is the structural schematic diagram of the elastomer of the embodiment of the present application 1；
Fig. 6 is the pressure sensor arrangement schematic diagram of the elastomer of the embodiment of the present application 1；
Fig. 7 is the structural schematic diagram A of the ablation catheter of the embodiment of the present application 1；
Fig. 8 is the structural schematic diagram B of the ablation catheter of the embodiment of the present application 1；
Fig. 9 is the axonometric drawing of the ablation catheter distal structure of the embodiment of the present application 2；
Figure 10 is the structural schematic diagram of the elastomer of the embodiment of the present application 2；
Figure 11 is the cross-sectional view of the ablation catheter distal structure of the embodiment of the present application 2；
Figure 12 is the structural schematic diagram of the ablation catheter of the embodiment of the present application 2；
Figure 13 is the structural schematic diagram of the elastomer of the ablation catheter of the embodiment of the present application 3；
Figure 14 is the axonometric drawing of the ablation catheter distal structure of the embodiment of the present application 4；
Marked in the figure: 1. head end electrodes, 2. ring electrode A, 3. ring electrode B, 4. ring electrode C, 5. elastomers, 51.A sections of A,52.A sections of B, 53. hollow slots A, 54. hollow slots B, 6. flexible pipe bodies, 7. pressure sensors, 71. main wire grids, 72. paranema grid,81. Magnetic Sensor A, 82. Magnetic Sensor B, 9. intrusion pipes, 10. temperature sensors, 11. fill orifices, 12. annular electrode D,13. annular electrode E, 14. tissues, 15- hollow-out parts.
Specific embodiment
Below with reference to embodiment and specific embodiment, the present invention is described in further detail.But this should not be understoodIt is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodimentsThe range of invention.
Embodiment 1
In the present embodiment, the ablation catheter where elastomer 5 applies such as Fig. 1, supravasal end electrodes (to pass through elastomer5 are mounted on the end of conduit) tissue 14 that reclines when, end electrodes bend with respect to conduit, and elastomer 5 deforms,Then it is related to a kind of ablation catheter of pressure detecting in the present embodiment, the distal end of the ablation catheter includes elastomer 5 and pressure sensingDevice 7, (elastomer 5 be circular tube structure), the elastomer 5 are tubular structure comprising A sections, B sections of (such as Fig. 4,5, here ASection is A sections of A51, is that the part of hollow slots A53, such as Fig. 5 are contained on elastomer 5, and B sections are then that not set below A sections of A51 is engravedThe part of empty slot A53), it is provided on the A sections of A51 and increases elasticity and end extends to B sections of engraved structure (i.e. hollow slotsThe width of A53, hollow slots A53 are 0.05mm-0.40mm, and hollow slots zone length is 1mm-5mm, the i.e. length of A sections of A51), BSection does not have engraved structure, is foil gauge in described pressure sensor 7(the present embodiment) A sections A51 and B sections of cross-connecting area is setDomain.
Specifically, the engraved structure includes several mutually indepedent settings and the continuous hollow out of hollow-out part such as Fig. 4,5Slot A53, the single hollow slots A53 is arranged in the shape of a spiral and the shape of all hollow slots A53 is identical, A sections describedA51 and B sections of handover region part is divided by several engraved structures with the several of 5 central axis circumference array of elastomer arrangementSection linkage section is 3 linkage sections in the present embodiment, and the pressure sensor 7 is fitted on the linkage section and sensor both endsIt is separately connected A sections A51 and B sections, Fig. 4,5 can be seen that pressure sensor 7 is mounted on linkage section, radial arrangement such as Fig. 6,7 quantity of pressure sensor is 3, and hollow slots A53 is also 3, and mutually adjacent superposition ground helix shape, 3 pressure sensingsAdjacent device 7 is in 120 ° of arrangements, and 3 cooperations of pressure sensor 7 can measure pressure size suffered by elastomer 5 and it leads relativelyThe direction of the local inclination of pipe tube body and angle, the extension path of the hollow slots A53 of single helix shape is in elastomerIt is in an annulus on axis projection, the end and bottom end at the top of hollow slots A53 are overlapped on the axis projection of elastomer, orIt is small that end and bottom end at the top of person's hollow slots A53 extend one to extending direction again after being overlapped on the axis projection of elastomerSection distance, this section of distance length are no more than 1/10th of the annulus perimeter on the axis projection of elastomer.
Specifically, including main wire grid 71 and paranema grid 72 in single pressure sensor 7, main wire grid 71 is really installedIn the position that the circumferential midline of handover region is extended a distance into A sections of A51, such as Fig. 4,5, this position is cross-connecting areaThe maximum place of stress maximum distortion in domain, paranema grid 72 are then fully located in the B section part in handover region, B sections of deformationVery little is almost nil, and 7 numerical value of pressure sensor that the main wire grid 71 in A sections of A51 is measured is actual numerical value plus pressure sensingThe summation for the numerical value that device 7 is affected by temperature, what the paranema grid 72 in B sections were measured is then the number that pressure sensor 7 is affected by temperatureValue, the two seek difference, it is concluded that handover region linkage section the numerical value accurately deformed, then be converted into pressure.
Hollow slots A53 in the engraved structure includes bending segment, and the engraved structure of the bending segment makes the A of elastomer 5At least one rounded structure or horn structure (being rounded structure in the present embodiment) are formed on section A51, are fillet in the present embodimentStructure, as Fig. 4 Fig. 5 can be seen that first is that facilitating the flat of pressure sensor 7(rectangle) installation, the side of pressure sensor 7Angle just matches the rounded structure on A sections of A51, more saving space, second is that making adjacent fillet, (multiple hollow slots A53 form moreA rounded structure) mutual restriction is constituted, after A sections of A51 bend to a degree, curved difficulty can become larger, and not continue to curvedSong guarantees that 5 pairs of elastomer are organized the pressure to recline.
The present embodiment also discloses a kind of ablation catheter of more specific pressure detecting, such as Fig. 2 .1,2.2,3 comprising:Head end electrode 1, the pressure sensor 7 and the elastomer 5, the head end electrode 1 are connected to described 5 one end of elastomer,It is that ring electrode (specifically includes ring electrode A2, ring electrode that several mappings or the electrode of ablation of being used for are provided on the distal structureB3, ring electrode C4,5 outer wall of elastomer are provided with the flexible pipe body 6 of protection elastomer 5 and pressure sensor 7, head end electrode 1Inside it is additionally provided with the fill orifice 11 of temperature sensor 10 and multiple head end electrodes that ablation effect is determined by temperature, fill orifice11 be the multiple fill orifices for being evenly distributed on electrode tip, and preferably 6 fill orifices, as shown in Fig. 2 .1, while fill orifice 11 can alsoThink the small fill orifice for being distributed in entire head end electrode, as shown in Fig. 2 .2, the fill orifice 11 of head end electrode is connected to intrusion pipe 9(being arranged in ablation catheter), for liquid to be perfused in ablation, cooling ablation tissue surface temperature is to control ablation tissue tableRadius surface and degree of ablation, and then increase depth of ablation.
Meanwhile the Magnetic Sensor that at least two axis are not parallel to each other is provided in the elastomer 5 or head end electrode 1,The absolute spatial position and pressure sensor 7 of its available distal structure obtain head end electrode 1 and elastomer 5 togetherState in absolute spatial position and space.
The present embodiment also discloses a kind of ablation catheter more specifically with pressure detecting function, such as Fig. 8,9, packetInclude: head end electrode 1, catheter tube, the pressure sensor 7 and the elastomer 5, the head end electrode 1 are connected to described5 one end of elastomer, one end of the relatively described head end electrode 1 is connected to one end of the catheter tube on the elastomer 5, describedThe Magnetic Sensor that at least two axis are not parallel to each other is provided in elastomer 5, head end electrode 1 or catheter tube (to specifically includeMagnetic Sensor A81, Magnetic Sensor B82, Magnetic Sensor A81, Magnetic Sensor B82 are set as relative position and keep certain and haveCertain angle (3 ° -90 °) is magnetic coil in Magnetic Sensor A81, Magnetic Sensor B82 the present embodiment, specifically installs in the present embodimentIn elastomer 5, and Magnetic Sensor A81, Magnetic Sensor B82 are staggeredly arranged in the axial direction of elastomer 5, can make elastomer 5Volume is more excellent and catheter proximal end is thinner, and each Magnetic Sensor can determine that it, in spatial position, is provided with outside Magnetic SensorMagnetic field generator, magnetic field generator can emit multiple magnetic fields, can generate induced current on Magnetic Sensor, pass through conducting wire feedback to controlBeing handled to obtain Magnetic Sensor in device processed in the position in magnetic field, a magnetic field of radiation is a plane spatially,Induced electricity flow valuve size can determine that the position of the Magnetic Sensor on this plane, multiple magnetic fields are to Magnetic Sensor on this planeMultiple plane convergences can determine that Magnetic Sensor spatially specific location, when two or more Magnetic Sensor A81, magnetic senseThe fixed relative position device B82 and angle, are regarded as a new coordinate (x1, y1, z1, x2, y2, z2) for the space coordinate of the two, whenThis coordinate has uniqueness when tube body rotates, therefore can accurately determine position and the rotational angle of conduit, and conduit is made to disappearLesion tissue can be more accurately found when melting and melts the direction that reclines of head end), catheter tube can deflect, the portion of deflectionIt is divided into deflection section, deflects and be provided with annular electrode D12, annular electrode E13 in section, annular electrode D12 and ring when deflection section is bentShape electrode E13 and head end electrode 1 determine the bending direction of tube body by 3 points at face principle, such as Fig. 7 before not being bent, after bendingSuch as Fig. 8, annular electrode spatial position changes.
The present embodiment also discloses a kind of ablating device of pressure detecting comprising: head end electrode 1, catheter tube, rear endEquipment, the pressure sensor 7 and the elastomer 5, the head end electrode 1 are connected to described 5 one end of elastomer, the bulletOne end of the relatively described head end electrode 1 is connected to one end of the catheter tube, relative resilient on the catheter tube on property body 5One end of body 5 is connected in the rear end equipment.
Embodiment 2
As in Fig. 9,10 the present embodiment ablation catheter and the different structure of embodiment 1 be that it is A sections that elastomer 5, which divides,B52, B sections, the width that hollow slots B54(hollow slots B54 is arranged on A sections of B52 is 0.05mm-0.40mm, and hollow slots zone length isThe length of 1mm-5mm, i.e. A section B52), several hollow-out parts are formed along B sections of edge portions in the engraved structure on the A sections of B5215, the bores of the hollow-out parts 15 is greater than other parts in engraved structure, such as Figure 10,11, be compared in hollow slots B54 toOn the elongated groove body that helically smoothly extends, the hollow-out parts 15 in hollow slots B54 are a bigger spaces, and one is sharedThree, elastomer 5 radially in adjacent 120 ° arrangements, can make length of the linkage section in 5 axial direction of elastomer longer in this way, becomeShape effect is more preferable, further increases the deformability of the handover region between A sections B52 and B sections, while handover region is to the anti-of stress(bonding agent, which fills up hollow-out parts 15, when being also possible to prevent bonding pressure sensor influences the performance of elastomer entirety) is more concentrated in feedback, makesThe dynamometry effect of pressure sensor 7 is more preferable, and Magnetic Sensor A81, Magnetic Sensor B82 are arranged in catheter tube in the present embodiment(being not located in elastomer 5, reduce interference when being bent to elastomer 5), such as Fig. 9,11,12.
Embodiment 3
Such as Figure 13, the different structure of ablation catheter and embodiment 1 in the present embodiment is, if the engraved structure includesDry mutually indepedent setting and the continuous hollow slots of hollow-out part, hollow slots are strip and prolong the axial arrangement (straight line of elastomer 5The hollow slots of type) and screw arrangement hollow slots A53 and hollow slots B54 different from, the elastomer 5 is similarly round tubeThe shape of structure, all hollow slots is identical.
Embodiment 4
Such as Figure 14, in the present embodiment and embodiment 1 the difference is that, two Magnetic Sensors (Magnetic Sensor A81 and magneticSensor B82) it is set together, Magnetic Sensor A81 and Magnetic Sensor B82 are that coil is coiled into shape of threads, two spiral shellsThe Magnetic Sensor arranged crosswise (can mutually through or not through) of striated structure, keeps Magnetic Sensor A81's and Magnetic Sensor B82Axis is not parallel to each other, while insulating layer is arranged outside the coil of Magnetic Sensor A81 and Magnetic Sensor B82, then mutual in this wayMagnetic Sensor A81 and Magnetic Sensor B82 will not influence the work of other side after intersection, and Magnetic Sensor A81 and magnetic can be made to senseDevice B82 is directly encapsulated into be mounted in conduit together and then again, further saves space, and conduit can be made to be made thinner.