CN108720920B - With the ablation catheter with tissue contact pressure detection function - Google Patents
With the ablation catheter with tissue contact pressure detection function Download PDFInfo
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- CN108720920B CN108720920B CN201710272302.8A CN201710272302A CN108720920B CN 108720920 B CN108720920 B CN 108720920B CN 201710272302 A CN201710272302 A CN 201710272302A CN 108720920 B CN108720920 B CN 108720920B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00345—Vascular system
- A61B2018/00351—Heart
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
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Abstract
The present invention relates to ablation catheter fields, in particular to a kind of ablation catheter with tissue contact pressure detection function, the distal end of the ablation catheter includes elastomer and pressure sensor, the elastomer is hollow out tubular structure, it includes A sections and B sections, it is provided in the A section and increases the engraved structure that elastic and end extends to B sections, the handover region of A sections He B sections is arranged in the pressure sensor, in the engraved structure include at least one extend steppedly and helical form arrangement bar shaped groove body, the purpose of the present invention is to provide a kind of pressure detecting more accurately ablation catheters, and the dependency structure comprising this ablation catheter.
Description
Technical field
The present invention relates to ablation catheter field, in particular to a kind of ablation catheter and packet with high-precision pressure detection
Include the dependency structure of 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 extensively
For treating such disease, when radio-frequency ablation procedure carries out, RF energy passes through conduit to electrode and the portion of electrode contact
Position 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 confirmation
It can be only achieved preferable therapeutic effect.Specifically, being to insert the catheter into heart, and keep conduit remote in ablation catheter treatment
End 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 with
And determine correctly recline direction and position, otherwise, excessive pressure or the incorrect position that reclines may cause to heart group
Worthless 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 gauge
Kind mode.
However in this strain gauge mode of the prior art is implemented, (the head end electrode of conduit passes through elastomer to elastomer
It is mounted on tube body, after head end electrode contacts tissue, further presses tissue under force, and elastomer exists
Then be bent during this) the bad control of elasticity modulus, if very big, the deformation of elastomer is relatively difficult, becomes
Shape 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 simultaneously
Becoming the measured numerical value of meter can also cooperate with rear alignment device, the position of measurement conduit head end and bending direction and angle
Degree, 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 small
Amount 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 serious
The problem of be exactly such elastomer too " soft " so that it is too flexible and when being unable to reach ablation to organizational stress most
Good 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 elastomer
Then structure is arranged multiple strain gauges on elastomer to measure, such as the CN102160909B patent of Johnson & Johnson, equally deposits
In 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 invasive
CN201610651602 patent, it still can have the above problem, although the deformation quantity of elastomer is bigger, for single
Strain 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 too
The problem of " soft ", then opposite, the measurement effect of strain gauge also has a upper limit, and current this mode still can exist and answer
Change meter is reflected, and the value is too small or the influential situation of accurate positioning of missing and conduit, meanwhile, this structure
In 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 survey
Dose-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, provide it is a kind of have contacted with tissue
The ablation catheter of pressure detecting function, 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 with tissue contact pressure detection function, the distal end of the ablation catheter include elastomer with
Pressure sensor, the elastomer are hollow out tubular structure, and the elastomer includes A sections and B sections, it is A sections described on be provided with end
Portion extends to B sections of engraved structure (increasing elasticity), and the handover region of A sections He B sections is arranged in the pressure sensor, described to engrave
In hollow structure include at least one extend steppedly and helical form arrangement bar shaped groove body, the hollow out knot can be made in this way
Structure forms at least one rounded structure or horn structure on A sections；
As described in the background art, in the prior art, elastomer or elasticity modulus are too big, deform in the case where by pressure
Amount is too small, so that pressure sensor (strain gauge described in background technology is one of) is reflected, the value is too small
Or missing, keep the detection effect of pressure bad, while numerical value measured by strain gauge can also be with rear alignment device phase interworking
Close, measure position and bending direction and the angle of conduit head end, if pressure sensor reflected that the value is too small or
Person'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 institute
The numerical value reflected is sufficiently large obvious enough, and the detection effect of pressure is fine, but has a serious problem to be exactly, such
Elastomer too " soft ", so that too flexible and when being unable to reach ablation the optimum state to organizational stress, the patch with tissue
Depended 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 sections
Name, elastomer include at least this two sections, and two sections of restriction simply facilitates differentiation, are not necessarily two-stage structure and separately form, than
Such 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 meeting
Certain keeps pressure sensor measurement more acurrate the pressure of tissue and certain deformability, then we just change a think of
Elastomer 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 knot
Structure, 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 cloth
The 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 existing
The 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 set
Structure 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 reached
Preferable balance, keeps entire elastomer in use, and elasticity is suitable, can achieve the best shape to organizational stress when ablation
State, 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 more
Greatly, the detection effect of pressure is more preferable, while measured numerical value can also cooperate with rear alignment device, measures conduit head end
Position and bending direction and angle, the numerical value that pressure sensor is reflected is bigger, then to the accurate positioning of conduit
More preferably.
Meanwhile the rounded structure or horn structure formed in A section, and it is in ladder that one is included at least in the engraved structure
Extend to shape and the bar shaped groove body of helical form arrangement, first is that facilitate the installation of specific pressure sensor (rectangle flat),
The corner of pressure sensor just matches rounded structure or horn structure in A section, more saving space, second is that making adjacent fillet
Or wedge angle (multiple hollow slots form multiple rounded structures) constitutes mutual restriction, after A sections bend to a degree, curved difficulty
Degree can become larger, and not continue to be bent, and guarantee the pressure that elastomer reclines to tissue, meanwhile, the ladder-like setting side of bar shaped groove body
Formula is compared to the trough body structure of same screw arrangement, and the path that groove body extends is longer, increases effect to the elasticity of elastomer
More preferably, stress response is allow to be easier to be embodied as out (the elasticity that helical structure combines the stepped arrangement of single groove body to make A sections
It advanced optimizes, helical structure can preferably make A sections and B sections of handover region deflection bigger, while can be preferably real
It is existing " to have the state mutually restricted between A sections of adjacent engraved structures, be unlikely to the excessive pressure that reclines caused to tissue of bending
Power is inadequate " (for example the ladder setting path of continuous hollow slots is not the arc-shaped of a smooth transition, such structure is side by side
After setting, in helical structure, mutual confinement effect is become apparent from, often A sections bend to a degree after, curved difficulty meeting
Become larger, guarantee the pressure to recline to tissue).
As a preferred solution of the present invention, the engraved structure includes several mutually indepedent settings and hollow-out part is continuous
Hollow 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, together
When 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 resilient
The 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 elastomer is the tubular structure or circular tube structure of hollow out, all institutes
The 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 A
The 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 structures
For several sections of linkage sections arranged with elastomer central axis circumference array, when single engraved structure extends to B sections of edges, then
Prolong 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 just
It 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 distinguished
A 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 one
End；
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 increases
Add 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 sensor
Section 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 sides
Stretch 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 most
Big 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 structure
Section, then handover region deformation then compared with the existing technology in complete elastomer structure deformation be one amplification table
It 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 reached
A preferable balance, keeps entire elastomer in use, and elasticity is suitable, can achieve the best shape to organizational stress when ablation
State, 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 more
Greatly, the detection effect of pressure is more preferable, while measured numerical value can also cooperate with rear alignment device, measures conduit head end
Position and bending direction and angle, the numerical value that pressure sensor is reflected is bigger, then to the accurate positioning of conduit
More 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 electrode
Capable Magnetic Sensor, is provided with magnetic field generator outside Magnetic Sensor, and magnetic field generator can emit multiple magnetic fields, Magnetic Sensor
On can generate induced current, handled into controller to obtain Magnetic Sensor in the position in magnetic field, radiation by conducting wire feedback
A magnetic field be a plane spatially, induced electricity flow valuve size can determine that the magnetic to Magnetic Sensor on this plane
The position of sensor on this plane, multiple magnetic fields, that is, multiple plane convergences can determine that Magnetic Sensor spatially specific position
It 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 one
New coordinate (x1, y1, z1, x2, y2, z2), when tube body rotation, this coordinate has uniqueness, therefore can accurately determine conduit
Position and rotational angle, then the pressure sensor on elastomer is cooperated (to obtain the bending angle and head end of entire elastomer
The relative position of electrode and elastomer bottom), so that conduit is more accurately found lesion tissue and ablation head in ablation
The 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 to
Described 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 A
In 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 region
The 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 stress
Influencing deformation maximum region must be in handover region, since the elasticity of A sections of elastomers is by engraved structure amplification and hollow out knot
Structure 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 one
The 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 occur
Topic can reach a preferable balance, keep entire elastomer in use, and elasticity is suitable, when can achieve ablation to tissue
The 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 reflected
Numerical 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 conduit
Accurate 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 tube
Magnetic Sensor, is provided with magnetic field generator outside Magnetic Sensor, and magnetic field generator can emit multiple magnetic fields, energy on Magnetic Sensor
Induced current is generated, is handled into controller to obtain Magnetic Sensor in the position in magnetic field by conducting wire feedback, the one of radiation
A magnetic field is a plane spatially, and induced electricity flow valuve size can determine that the magnetic senses to Magnetic Sensor on this plane
The position of device on this plane, multiple magnetic fields, that is, multiple plane convergences can determine that Magnetic Sensor spatially specific location, when 2
A 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 conduit
And rotational angle, then cooperate on elastomer pressure sensor (obtain entire elastomer bending angle and head end electrode and
The relative position of elastomer bottom), so that conduit is more accurately found lesion tissue in ablation and is melted the patch of head end
By direction.
The invention also discloses a kind of ablating devices with pressure detecting function comprising: head end electrode, catheter tube
Body, rear end equipment and the elastomer and pressure sensor, the head end electrode is connected to described elastomer one end, described
One end of the relatively described head end electrode is connected to one end of the catheter tube, relative resilient on the catheter tube on elastomer
One end of body is connected in the rear end equipment, in whole ablating device, elastomer is clearly divided into A sections and B
Section, 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 region
The 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), by
Stress influence deformation maximum region must be in handover region, since the elasticity of A sections of elastomers is amplified and engraved by engraved structure
Hollow structure is connected to B sections, then handover region deformation then compared with the existing technology in complete elastomer structure deformation
It 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 technique
The problem of, a preferable balance can be reached, keep entire elastomer in use, elasticity is suitable, can achieve pair when ablation
The 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 institute
The 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 device
Cooperation, the position of measurement conduit head end and bending direction and angle, the numerical value that pressure sensor is reflected is bigger, then right
The 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 engrave
Hollow 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 junctions
The 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 A
Section elastomer elasticity by engraved structure amplification and engraved structure be connected to B sections, then the deformation of handover region then relative to
The deformation of complete elastomer structure in the prior art is the performance of an amplification, meanwhile, and be unlikely to whole all settings and engrave
Hollow 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 exist
In 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, and
And 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, simultaneously
Measured 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 1
Hole)；
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 cross-sectional view of the ablation catheter distal structure of the embodiment of the present application 2；
Figure 10 is the structural schematic diagram of the ablation catheter of the embodiment of the present application 2；
Figure 11 is the structural schematic diagram of the elastomer of the ablation catheter of the embodiment of the present application 3；
Figure 12 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,
53. hollow slots A, 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. human body groups
It knits.
Specific embodiment
Below with reference to embodiment and specific embodiment, the present invention is described in further detail.But this should not be understood
It 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 embodiments
The 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 elastomer
5 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 with tissue contact pressure detection function in the present embodiment, the distal end of the ablation catheter includes
Elastomer 5 and pressure sensor 7, (elastomer 5 is circular tube structure), the elastomer 5 is tubular structure comprising A sections,
B sections (such as Fig. 4,5, it is that the part of hollow slots A53, such as Fig. 5 are contained on elastomer 5, B sections are then A sections that A sections, which are A sections of A51, here
The part of not set hollow slots A53 below A51), it is provided on the A sections of A51 and increases elasticity and end extends to B sections and engraves
(i.e. the width of hollow slots A53, hollow slots A53 are 0.05mm-0.40mm to hollow structure, and hollow slots zone length is 1mm-5mm, i.e. A
The length of section A51), be foil gauge in described pressure sensor 7(the present embodiment) A sections A51 and B sections of handover region, B are set
Section does not have engraved structure, and one is included at least in the engraved structure and is extended steppedly and the bar shaped groove body of helical form arrangement
(being hollow slots A53 in the present embodiment).
Specifically, the engraved structure includes several mutually indepedent settings and the continuous hollow out of hollow-out part such as Fig. 4,5
Slot 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 described
A51 and B sections of handover region part is divided by several engraved structures with the several of 5 central axis circumference array of elastomer arrangement
Section linkage section is 3 linkage sections in the present embodiment, and the pressure sensor 7 is fitted on the linkage section and sensor both ends
It 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 sensings
Adjacent device 7 is in 120 ° of arrangements, and hollow slots A53 is three, is adjacent to and is superposed, and 3 cooperations of pressure sensor 7 can measure bullet
Property body 5 suffered by pressure size and its direction and angle with respect to the local inclination of catheter tube, single hollow slots A53 ladder
Extend to shape and helical form is arranged, extends to single scalariform and the extension path of the hollow slots A53 of helix shape is in elasticity
It is in an annulus on the axis projection of body, the weight on the axis projection of elastomer of the end and bottom end at the top of hollow slots A53
Close or hollow slots A53 at the top of end and bottom end be overlapped on the axis projection of elastomer after prolong again to extending direction
A small distance is stretched, this section of distance length is 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 installed
In 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 area
The 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 deformation
Very 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 sensing
The 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 temperature
Value, the two seek difference, it is concluded that handover region linkage section the numerical value accurately deformed, then be converted into pressure.
In the engraved structure include at least one extend steppedly and helical form arrangement bar shaped groove body, " ladder
Shape " specifically makes the hollow slots A53 in the engraved structure include bending segment, and the engraved structure of the bending segment makes the A of elastomer 5
At least one rounded structure or horn structure (being rounded structure in the present embodiment) are formed on section A51, are fillet in the present embodiment
Structure, 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 7
Angle just matches the rounded structure on A sections of A51, more saving space, second is that making adjacent fillet, (multiple hollow slots A53 form more
A rounded structure) mutual restriction is constituted, after A sections of A51 bend to a degree, curved difficulty can become larger, and not continue to curved
Song 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 structure
B3, 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 1
Inside 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 orifice
11 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 also
Think 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 table
Radius 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 together
State in absolute spatial position and space.
The present embodiment also discloses a kind of ablation catheter of more specific pressure detecting, such as Fig. 8,9 comprising: head end electricity
Pole 1, catheter tube, the pressure sensor 7 and the elastomer 5, the head end electrode 1 are connected to the elastomer 5 one
End, one end of the relatively described head end electrode 1 is connected to one end of the catheter tube on the elastomer 5, the elastomer 5,
It is provided with the Magnetic Sensor that at least two axis are not parallel to each other in head end electrode 1 or catheter tube and (specifically includes Magnetic Sensor
A81, Magnetic Sensor B82, Magnetic Sensor A81, Magnetic Sensor B82 are set as relative position and keep certain and have certain angle
(3 ° -90 °) are magnetic coil in Magnetic Sensor A81, Magnetic Sensor B82 the present embodiment, are specifically mounted on elastomer in the present embodiment
In 5, and Magnetic Sensor A81, Magnetic Sensor B82 are staggeredly arranged in the axial direction of elastomer 5, and 5 volume of elastomer can be made more excellent
And catheter proximal end is thinner, each Magnetic Sensor can determine that it, in spatial position, is provided with magnetic field outside Magnetic Sensor
Device, magnetic field generator can emit multiple magnetic fields, can generate induced current on Magnetic Sensor, by conducting wire feedback into controller into
Row processing obtains Magnetic Sensor in the position in magnetic field, and a magnetic field of radiation is a plane spatially, Magnetic Sensor
Induced electricity flow valuve size can determine that the position of the Magnetic Sensor on this plane, multiple magnetic fields, that is, multiple planes on this plane
It crosses and can determine that Magnetic Sensor spatially specific location, when two or more Magnetic Sensor A81, Magnetic Sensor B82 are solid
Determine relative position and angle, the space coordinate of the two is regarded as a new coordinate (x1, y1, z1, x2, y2, z2), when tube body rotates
When this coordinate there is uniqueness, therefore can accurately determine position and the rotational angle of conduit, make conduit in ablation Shi Nenggeng
Add the direction that reclines accurately found lesion tissue and melt head end), catheter tube can deflect, and the part of deflection is deflection
Section deflects and is provided with annular electrode D12, annular electrode E13 in section, annular electrode D12 and annular electrode E13 when deflection section is bent
And head end electrode 1 determines the bending direction of tube body by 3 points at face principle, it is annular such as Fig. 8 after bending such as Fig. 7 before not being bent
Electrode space position changes.
The present embodiment also discloses a kind of ablating device of pressure detecting comprising: head end electrode 1, catheter tube, rear end
Equipment, the pressure sensor 7 and the elastomer 5, the head end electrode 1 are connected to described 5 one end of elastomer, the bullet
One 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 5
One end of body 5 is connected in the rear end equipment.
Embodiment 2
Such as Fig. 9,10, the different structure of ablation catheter and embodiment 1 in the present embodiment is that Magnetic Sensor A81, magnetic pass
Sensor B82 is arranged in catheter tube and (is not located in elastomer 5, reduce interference when being bent to elastomer 5).
Embodiment 3
Such as Figure 11, the different structure of ablation catheter and embodiment 1 in the present embodiment is, if the engraved structure includes
Dry 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 5
The hollow slots of type) and screw arrangement hollow slots A53 and hollow slots B54 different from, the elastomer 5 is similarly round tube
The shape of structure, all hollow slots is identical.
Embodiment 4
Such as Figure 12, in the present embodiment and embodiment 1 the difference is that, two Magnetic Sensors (Magnetic Sensor A81 and magnetic
Sensor B82) it is set together, Magnetic Sensor A81 and Magnetic Sensor B82 are that coil is coiled into shape of threads, two spiral shells
The Magnetic Sensor arranged crosswise (can mutually through or not through) of striated structure, keeps Magnetic Sensor A81's and Magnetic Sensor B82
Axis 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 way
Magnetic 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 sense
Device 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.
Claims (13)
1. a kind of ablation catheter with tissue contact pressure detection function, the distal end of the ablation catheter includes elastomer and pressure
Force snesor, the elastomer are hollow out tubular structure, which is characterized in that the elastomer includes A sections and B sections, in the A section
It is provided with the engraved structure that end extends to B sections, the handover region of A sections He B sections, the hollow out is arranged in the pressure sensor
In structure include at least one extend steppedly and helical form arrangement bar shaped groove body.
2. the ablation catheter according to claim 1 having with tissue contact pressure detection function, which is characterized in that described
Bar shaped groove body is several mutually indepedent settings and the continuous hollow slots of hollow-out part.
3. the ablation catheter according to claim 2 having with tissue contact pressure detection function, which is characterized in that described
Elastomer is the tubular structure of hollow out, and the shape of all hollow slots is identical.
4. the ablation catheter according to claim 2 having with tissue contact pressure detection function, which is characterized in that described
Elastomer is circular tube structure, and the shape of all hollow slots is identical.
5. the ablation catheter according to any one of claims 1-4 having with tissue contact pressure detection function, special
Sign is that described A sections and B sections of handover region part is divided by several engraved structures with elastomer central axis Circle-Array
Arrange several sections of linkage sections of arrangement.
6. the ablation catheter according to claim 5 having with tissue contact pressure detection function, which is characterized in that described
Pressure sensor is fitted on the linkage section and sensor both ends are separately connected A sections and B sections.
7. the ablation catheter according to claim 1 having with tissue contact pressure detection function, which is characterized in that described
Pressure sensor is foil gauge.
8. the ablation catheter according to claim 1 having with tissue contact pressure detection function, which is characterized in that also wrap
Include: head end electrode, the head end electrode are connected to described elastomer one end.
9. the ablation catheter according to claim 8 having with tissue contact pressure detection function, which is characterized in that described
The Magnetic Sensor that at least two axis are not parallel to each other is provided in elastomer or head end electrode.
10. the ablation catheter according to claim 1 having with tissue contact pressure detection function, which is characterized in that also
It include: head end electrode and catheter tube, the head end electrode is connected to described elastomer one end, relatively described on the elastomer
One end of head end electrode is connected to one end of the catheter tube.
11. the ablation catheter according to claim 10 having with tissue contact pressure detection function, which is characterized in that institute
It states and is provided with the Magnetic Sensor that at least two axis are not parallel to each other in elastomer, head end electrode or catheter tube.
12. the ablation catheter according to claim 10 having with tissue contact pressure detection function, which is characterized in that institute
It states head end electrode and is provided with multiple fill orifices.
13. a kind of ablating device with pressure detecting function characterized by comprising head end electrode, catheter tube, rear end
Pressure sensor described in elastomer described in equipment, claim 1 and claim 1, the head end electrode are connected to
Described elastomer one end, one end of the relatively described head end electrode is connected to one end of the catheter tube, institute on the elastomer
The one end for stating relatively elastic body on catheter tube is connected in the rear end equipment.
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| CN201710272302.8A CN108720920B (en) | 2017-04-24 | 2017-04-24 | With the ablation catheter with tissue contact pressure detection function |
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| CN201710272302.8A CN108720920B (en) | 2017-04-24 | 2017-04-24 | With the ablation catheter with tissue contact pressure detection function |
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| CN108720920B true CN108720920B (en) | 2019-07-09 |
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| EP3754322A1 (en) * | 2019-06-18 | 2020-12-23 | Xyall B.V. | Tissue sample dissection apparatus |
| WO2022001588A1 (en) * | 2020-06-30 | 2022-01-06 | 上海微创电生理医疗科技股份有限公司 | Medical catheter |
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| CN101416874A (en) * | 2007-10-08 | 2009-04-29 | 韦伯斯特生物官能公司 | Catheter with pressure sensing |
| CN101780303A (en) * | 2008-12-03 | 2010-07-21 | 韦伯斯特生物官能公司 | High-sensitivity pressure-sensing probe |
| CN102892453A (en) * | 2010-03-12 | 2013-01-23 | 圣犹达医疗用品电生理部门有限公司 | Magnetically guided catheter |
| CN106264719A (en) * | 2016-07-29 | 2017-01-04 | 上海微创电生理医疗科技股份有限公司 | Electrophysiologicalcatheter catheter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9585587B2 (en) * | 2010-11-09 | 2017-03-07 | St. Judge Medical, Atrial Fibrillation Division, Inc. | Fixed loop deflectable electrophysiology catheters having an extended braid primary shaft coupled to the periphery of the fixed loop and methods of manufacturing therefor |
| US9162046B2 (en) * | 2011-10-18 | 2015-10-20 | Boston Scientific Scimed, Inc. | Deflectable medical devices |
| US9216057B2 (en) * | 2013-03-15 | 2015-12-22 | Kyphon Sarl | Steerable catheter system and method of using a steerable catheter system to dissect and evacuate tissue |
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2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101416874A (en) * | 2007-10-08 | 2009-04-29 | 韦伯斯特生物官能公司 | Catheter with pressure sensing |
| CN101780303A (en) * | 2008-12-03 | 2010-07-21 | 韦伯斯特生物官能公司 | High-sensitivity pressure-sensing probe |
| CN102892453A (en) * | 2010-03-12 | 2013-01-23 | 圣犹达医疗用品电生理部门有限公司 | Magnetically guided catheter |
| CN106264719A (en) * | 2016-07-29 | 2017-01-04 | 上海微创电生理医疗科技股份有限公司 | Electrophysiologicalcatheter catheter |
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Address after: No.5, Wuke East 3rd road, Wuhou Science Park, Chengdu hi tech Industrial Development Zone, Sichuan 610045 Patentee after: Sichuan Jinjiang Electronic Medical Device Technology Co.,Ltd. Address before: No.5, Wuke East 3rd road, Wuhou Science Park, Chengdu hi tech Industrial Development Zone, Sichuan 610045 Patentee before: SICHUAN JINJIANG ELECTRONIC SCIENCE AND TECHNOLOGY Co.,Ltd. |