CN108720919A - A kind of ablation catheter with flexible distal - Google Patents
A kind of ablation catheter with flexible distal Download PDFInfo
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- CN108720919A CN108720919A CN201710271307.9A CN201710271307A CN108720919A CN 108720919 A CN108720919 A CN 108720919A CN 201710271307 A CN201710271307 A CN 201710271307A CN 108720919 A CN108720919 A CN 108720919A
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- elastomer
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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
- A61B2018/00595—Cauterization
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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
- A61B2018/1405—Electrodes having a specific shape
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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
- A61B2018/1467—Probes or electrodes therefor using more than two electrodes on a single probe
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Abstract
The present invention relates to ablation catheter fields, more particularly to a kind of ablation catheter with flexible distal, 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 sections and increases the engraved structure that elastic and end extends to B sections, prolong B sections of edge portions in engraved structure and forms several hollow-out parts, the bore of the hollow-out parts is more than other parts in engraved structure, bar segment is formed between adjacent hollow-out parts, the bar segment is more than the length in elastomer circumferential direction along the length of elastomer axial direction, the pressure sensor is arranged on the bar segment, the purpose of the present invention is to provide a kind of pressure detecting more accurately ablation catheters, and include the dependency structure of this ablation catheter.
Description
Technical field
The present invention relates to ablation catheter field, more particularly to a kind of ablation catheter and packet with high-precision pressure detection
Include the dependency structure of this ablation catheter.
Background technology
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 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.It is to insert the catheter into heart, and keep conduit remote specifically, when ablation catheter is treated
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 be caused to heart group
Worthless damage, or even heart wall perforation are knitted, while the size of contact is also the same most important to being accurately positioned for conduit.
In the prior art, there are many modes for measuring this contact, 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, elastomer（The head end electrode of conduit passes through elastomer
On tube body, after head end electrode contacts tissue, further press tissue under force, and elastomer exists
It is then 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 the numerical value that is reflected of strain gauge is too small or missing, keeps the detection result 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 can also have an impact being accurately positioned for conduit if the numerical value that is reflected of strain gauge is too small or missing；
But on the contrary, if the elasticity modulus of elastomer is very small, the deformation of elastomer is opposite to be easier to, and quantitative change is deformed
Big, the numerical value that strain gauge is reflected is sufficiently large apparent enough, and the detection result of pressure is fine, but is asked there are one serious
Topic is exactly such elastomer too " soft ", so that too flexible and when being unable to reach ablation the best shape to organizational stress
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 to measure on elastomer, such as the CN102160909B patents of Johnson & Johnson, equally deposits
In our above-mentioned problems；
Secondly, also have using incomplete elastomer structure（Such as engraved structure）, such as minimally invasive to increase the elasticity of elastomer
CN201610651602 patents, it still can have the above problem, although the deformation quantity bigger of elastomer, for single
Strain gauge measurement is more helpful, but there are one lower limits always for the reduction of elastomeric resilient modulus, cannot occur above-mentioned too " soft "
The problem of, then opposite, for the measurement effect of strain gauge also there are one the upper limit, current this mode still can have strain gauge
The numerical value reflected is too small or missing and conduit are accurately positioned influential situation, meanwhile, this structure is in reality
After border is in use, be bent certain number, it is also easy to produce fatigue, the measurement of strain gauge at that time can be very inaccurate, influences to measure effect
Fruit.
Invention content
It is an object of the invention to overcoming the above-mentioned deficiency in the presence of the prior art, provide a kind of with flexible distal
Ablation catheter, and include the dependency structure of this ablation catheter.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes：
The distal end of a kind of ablation catheter with flexible distal, the ablation catheter includes elastomer and pressure sensor, the bullet
Property 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 sections
Structure（Increase elasticity）, several hollow-out parts are formed along B sections of edge portions in engraved structure, and the bore of the hollow-out parts is more than hollow out
Other parts in structure, form bar segment between adjacent hollow-out parts, and the bar segment is more than edge along the length of elastomer axial direction
Length in elastomer circumferential direction, the pressure sensor are arranged on the bar segment, and bar segment is the friendship for forming A sections and B sections
Connect region；
As described in the background art, in the prior art, or elastomer elasticity modulus is too big, in the case of by pressure, deflection is too
It is small, so that pressure sensor（Strain gauge described in background technology is one of which）The numerical value reflected it is too small or
Missing, keeps the detection result of pressure bad, while the numerical value measured by strain gauge can also cooperate with rear alignment device, surveys
The position of amount conduit head end and bending direction and angle, if the numerical value that pressure sensor is reflected is too small or scarce
It loses, then can also have an impact to being accurately positioned for conduit；
Or the elasticity modulus of elastomer is too small, then deformation is opposite is easier to, and deflection becomes larger, and pressure sensor is reflected
Numerical value out is sufficiently large apparent enough, and the detection result of pressure is fine, but is exactly such elasticity there are one serious problem
Body too " soft ", so that too flexible and when being unable to reach ablation the optimum state to organizational stress, the pressure that reclines with tissue
Power is inadequate；
And we use the structure of A sections and B sections, an A sections and B sections only names to two-stage structure on elastomer here,
Elastomer includes at least this two sections, and two sections of restriction simply facilitates differentiation, is not necessarily two-stage structure and is separately molded, such as A
Section and B sections of integrated moldings, we can also limit the section of elastomer different location with " A sections " and " B sections "；
Since under existing background, it is suitable that we can not find a deflection, make the use of elastomer while meeting certain
So that pressure sensor is measured the pressure of tissue and certain deformability more acurrate, then we just change a thinking,
Elastomer clearly divides into A sections and B sections, and in A sections setting increase elasticity and end extend to B sections of engraved structure, institute
Pressure sensor is stated then to be arranged in A sections and B sections of handover region（A sections are the knot of a ring-type or annular configuration with B sections of junctions
Structure, handover region are then limited to this junction and respectively extend the region that one section of centre is sandwiched to both sides）, then, elastomer
On（At least A sections and B sections of parts）In, it must be in handover region, due to A sections of elastomer that affected by force, which deforms maximum region,
Elasticity by engraved structure amplification and engraved structure be connected to B sections, then the deformation of handover region then compared with the existing technology in
Complete elastomer structure deformation be an amplification performance, meanwhile, and be unlikely to whole and all engraved structure be set and is led
Cause elasticity is too big the problems in background technology occur（With the inadequate and On The Yielding that reclines of tissue）, one can be reached preferably
Balance, keeps entire elastomer in use, and elasticity is suitable, can reach the optimum state to organizational stress when ablation, with group
The pressure that reclines knitted is enough big, and the deflection of handover region reaches big, the numerical value bigger that pressure sensor is reflected, pressure
The more preferable while measured numerical value of detection result can also cooperate with rear alignment device, measure the position of conduit head end
And bending direction and angle, the numerical value bigger that pressure sensor is reflected are then also more preferable to being accurately positioned for conduit.
Meanwhile in the plan of establishment of the hollow-out parts, bore is more than other parts in engraved structure, is compared to hollow out
The elongated groove body that helically smoothly extends upwards in slot, hollow-out parts are a bigger spaces, can make friendship in this way
It is longer to connect length of the surface area smaller in region simultaneously in elastomer axial direction, i.e., length of the described bar segment along elastomer axial direction
More than the length in elastomer circumferential direction, bar segment is the handover region for forming A sections and B sections, makes the deformation effect of elastomer more
It is good, while in the deformability for further increasing A sections and handover region intersegmental B, at the same handover region to the feedback of stress more
It concentrates（Bonding agent, which fills up hollow-out parts 15, when being also possible to prevent bonding pressure sensor influences the performance of elastomer entirety）, make pressure
The dynamometry effect of sensor is more preferable, meanwhile, make two be bent in elastomer axial direction section of elastomer are opposite to bend, bends trace
Along the circumferentially extending of elastomer, the feedback of stress is more concentrated when bar segment being made to bend elastomer, while coordinating pressure sensor,
Keep measured value more acurrate.
As the preferred embodiment of the present invention, the engraved structure includes several settings independently of each other and hollow-out part is continuous
Hollow slots, the continuous engraved structure of hollow-out part can make opposite B sections of the deformation bigger of A sections by the elastomer of pressure, together
When handover region deflection also bigger, and continuous hollow slots that several are arranged independently of each other are necessarily arranged side by side,
Such structure is ensureing that A section elastomeric resilients are better and there are one can making between A sections of adjacent engraved structures
The state mutually restricted, being unlikely to bending excessively causes the pressure that reclines to tissue inadequate.
As the preferred embodiment of the present invention, the single hollow slots arrange that helical structure can make A sections in the shape of a spiral
Elasticity advanced optimizes, under the premise of " several are arranged independently of each other and the continuous hollow slots of hollow-out part ", helical structure
The handover region deflection bigger of A sections and B sections can preferably be made, while " A sections of adjacent engraved structures can be better achieved
Between there are one the state that mutually restricts, be unlikely to that bending is excessive to cause the pressure that reclines to tissue inadequate "（For example it continuously engraves
The setting path of empty slot is not an arc-shaped seamlessly transitted, after such structure is arranged side by side, in helical structure, mutually
Confinement effect become apparent from, often A sections bend to a degree after, the difficulty of bending can become larger, and ensure to the pressure that reclines of tissue
Power）.
As the preferred embodiment 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 evenly, is more convenient to measure.
As the preferred embodiment 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 shaft circumference array, i.e. bar segment is arranged with elastomer central shaft 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 more
Small, then under same pressure condition, the stress of handover region is just more concentrated, and deflection is with regard to bigger, the number measured by pressure sensor
Value is more acurrate with regard to bigger, and measurement effect is more preferable.
As the preferred embodiment 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, deflection bigger,
Pressure sensor is arranged on linkage section, then can effectively measure the deformation of linkage section, measurement effect is more preferable.
As the preferred embodiment of the present invention, the pressure sensor is foil gauge.
As the preferred embodiment of the present invention, the head end electrode is provided with multiple fill orifices.
As the preferred embodiment 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 setting increases bullet in A sections
Property and end extend to B sections of engraved structure, the pressure sensor is then arranged in A sections and B sections of handover region（A sections and B
Section junction is the structure of a ring-type or annular configuration, and handover region is then limited to this junction and respectively extends one section to both sides
The region that is sandwiched of centre）, then, on elastomer（At least A sections and B sections of parts）In, affected by force deforms maximum region
Must be in handover region, due to A sections of elastomers elasticity by engraved structure amplification and engraved structure be connected to B sections, then
Handover region deformation then compared with the existing technology in complete elastomer structure deformation be one amplification performance, together
When, and be unlikely to whole and all engraved structure be set and leads to that elasticity is too big the problems in background technology occurs, can reach one compared with
Good balance, keeps entire elastomer in use, and elasticity is suitable, can reach the optimum state to organizational stress when ablation,
It is enough big with the pressure that reclines of tissue, and the deflection of handover region reaches big, the numerical value bigger that pressure sensor is reflected,
The detection result 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 bigger that pressure sensor is reflected, then being accurately positioned also more to conduit
It is good.
As the preferred embodiment 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, the position for being handled to obtain Magnetic Sensor in magnetic field is fed back in controller by conducting wire, radiate
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, Magnetic Sensor fixation relative position and angle, the space coordinate of the two is regarded as one
New coordinate（x1,y1,z1,x2,y2,z2）, when tube body rotates, this coordinate has uniqueness, therefore can accurately judge conduit
Position and rotational angle, then coordinate the pressure sensor on elastomer（Obtain the bending angle and head end of entire elastomer
The relative position of electrode and elastomer bottom）, conduit is enable more accurately to find lesion tissue and ablation head in ablation
The direction that reclines at end.
As the present invention preferred embodiment, 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 in A sections
Increase elasticity and end is set and extends to B sections of engraved structure, the pressure sensor is then arranged in A sections and B sections of handing-over
Region（A sections and structure that B section junctions are a ring-type or annular configuration, handover region be then limited to this junction respectively to
Both sides extend the region that one section of centre is sandwiched）, then, on elastomer（At least A sections and B sections of parts）In, affected by force
Deformation maximum region must be in handover region, since the elasticity of A sections of elastomers is by engraved structure amplification and engraved structure company
Be 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 and put
Big performance, meanwhile, and be unlikely to whole and all engraved structure is set and causes elasticity is too big the problems in background technology, energy occur
Reach a preferable balance, keep entire elastomer in use, elasticity is suitable, when can reach ablation to organizational stress
Optimum state, it is enough big with the pressure that reclines of tissue, and also the deflection of handover region is enough big, what pressure sensor was reflected
The detection result of numerical value bigger, pressure is more preferable, while measured numerical value can also cooperate with rear alignment device, and measurement is led
The position at tube head end and bending direction and angle, the numerical value bigger that pressure sensor is reflected, then to the accurate of conduit
Positioning is also more preferable.
Preferably, it is provided with what at least two axis were not mutually parallel 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, feeds back in controller the position for being handled to obtain Magnetic Sensor in magnetic field by conducting wire, 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 more Magnetic Sensor, Magnetic Sensor fixation relative position and angle, a new coordinate is regarded as by the space coordinate of the two
（x1,y1,z1,x2,y2,z2）, when tube body rotates, this coordinate has uniqueness, therefore can accurately judge the position of conduit
And rotational angle, then coordinate the pressure sensor on elastomer（Obtain entire elastomer bending angle and head end electrode and
The relative position of elastomer bottom）, conduit is enable more accurately to find lesion tissue in ablation and melt 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 on elastomer, relative resilient on the catheter tube
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 sections setting increase elasticity and end extend to B sections of engraved structure, the pressure sensor be then arranged A sections with
B sections of handover region（A sections are then limited to this company with the structure that B sections of junctions are a ring-type or annular configuration, handover region
The region that each centre for extending one section to both sides in the place of connecing is sandwiched）, then, on elastomer（At least A sections and B sections of parts）In, 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 technology
The problem of, a preferable balance can be reached, keep entire elastomer in use, elasticity is suitable, can reach 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 bigger reflected, the detection result 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 bigger that pressure sensor is reflected are then right
Being accurately positioned for 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 sections setting increase elasticity and end extend to B sections of hollow out knot
Structure, the pressure sensor are then arranged in A sections and B sections of handover region（A sections are a ring-type or cyclic annular cloth with B sections of junctions
The structure set, handover region are then limited to this junction and respectively extend the region that one section of centre is sandwiched to both sides）, then,
On elastomer（At least A sections and B sections of parts）In, it must be in handover region, due to A sections that affected by force, which deforms maximum region,
The elasticity of elastomer is amplified by engraved structure 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 lead to that elasticity is too big the problems in background technology occurs, a preferable balance can be reached, entire elastomer is made to use
In, elasticity is suitable, can reach the optimum state to organizational stress when ablation, big, Er Qiejiao is reached with the pressure that reclines of tissue
The deflection for connecing region is enough big, and the numerical value bigger that pressure sensor is reflected, the detection result of pressure is more preferable, while being surveyed
The numerical value of amount can also cooperate with rear alignment device, measure position and bending direction and the angle of conduit head end, pressure
The numerical value bigger that sensor is reflected, then it is also more preferable to being accurately positioned for conduit, meanwhile, the plan of establishment of the hollow-out parts
In, bore be more than engraved structure in other parts, be compared in hollow slots upwards helically smoothly extend it is elongated
Groove body, hollow-out parts are a bigger spaces, can make the surface area smaller of handover region simultaneously in elastomer axis in this way
Upward length is longer, and deformation effect is more preferable, further increases the deformability of A sections and handover region intersegmental B, joins simultaneously
The feedback of stress is more concentrated in region, keeps the dynamometry effect of pressure sensor more preferable, meanwhile, the plan of establishment of the hollow-out parts
In, bore be more than engraved structure in other parts, be compared in hollow slots upwards helically smoothly extend it is elongated
Groove body, empty portion is a bigger space, can make the surface area smaller of handover region simultaneously in elastomer axial direction in this way
On length it is longer, deformation effect is more preferable, further increases the deformability of A sections and handover region intersegmental B, while cross-connecting area
The feedback of stress is more concentrated in domain, keeps the dynamometry effect of pressure sensor more preferable.
Description of the drawings：
Fig. 1 is the ablation schematic diagram of the embodiment of the present application 1；
Fig. 2 .1 are the external structure schematic diagram of the ablation catheter distal structure of the embodiment of the present application 1（Multiple fill orifices）；
Fig. 2 .2 are the external structure schematic diagram of the ablation catheter distal structure of the embodiment of the present application 1（Multiple fine fill orifices）；
Fig. 3 is the 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 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；
It is marked in figure：1. head end electrode, 2. ring electrode A, 3. ring electrode B, 4. ring electrode C, 5. elastomers, 52.A sections of B,
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. human body groups
It knits, 15- hollow-out parts.
Specific implementation mode
With reference to embodiment and specific implementation mode, the present invention is described in further detail.But this should not be understood
It is only limitted to embodiment below for the range of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that the content of present invention is realized
The range of invention.
Embodiment 1
In the present embodiment, the ablation catheter where elastomer 5 is applied such as Fig. 1, supravasal end electrodes（Pacified by elastomer 5
Mounted in the end of conduit）When the tissue 14 that reclines, end electrodes bend with respect to conduit, and elastomer 5 deforms, this reality
It applies and is then related to a kind of ablation catheter with flexible distal in example, the distal end of the ablation catheter includes elastomer 5 and pressure sensing
Device 7,（The elastomer 5 is circular tube structure）, the elastomer 5 is tubular structure comprising A sections, B sections（Such as Fig. 4,5, A here
Section is A sections of B52, is the part that hollow slots B54 is contained on elastomer 5, such as Fig. 5, B sections are then that not being arranged below A sections of B52 is engraved
The part of empty slot B54）, it is provided on the A sections of B52 and increases elasticity and end extends to B sections of engraved structure（That is hollow slots
The width of B54, hollow slots B54 are 0.05mm-0.40mm, and hollow slots zone length is 1mm-5mm, the i.e. length of A sections of B52）, institute
State pressure sensor 7（It is foil gauge in the present embodiment）Handover region at A sections B52 and B sections is set, and B sections do not have engraved structure.
Specifically, such as Fig. 4,5, the engraved structure includes several setting and the continuous hollow outs of hollow-out part independently of each other
Slot B54, the single hollow slots B54 is arranged in the shape of a spiral and the shape of all hollow slots B54 is identical, A sections described
B52 and B sections of handover region part be divided by several engraved structures arranged with 5 central shaft circumference array of elastomer it is several
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 B52 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 B54 is also 3, and mutually adjacent superposition ground helix shape, 3 pressure sensings
It is in 120 ° of arrangements that device 7 is adjacent, and 3 pressure sensors 7, which coordinate, can measure pressure size suffered by elastomer 5 and it opposite is led
The direction of the local inclination of pipe tube body and angle, the extension path of the hollow slots B54 of single helix shape is in elastomer
It is in an annulus on axis projection, end and bottom end at the top of hollow slots B54 overlap on the axis projection of elastomer, or
It is small that end and bottom end at the top of person's hollow slots B54 extend one to extending direction again after being overlapped on the axis projection of elastomer
Segment distance, the segment distance length are no more than 1/10th of the annulus perimeter on the axis projection of elastomer.
Specifically, single pressure sensor 7 includes main wire grid 71 and paranema grid 72, 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 B52, 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 sections 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 B52 is measured is that actual numerical value adds 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.
It is A sections B52, B sections that elastomer 5, which divides, and hollow slots B54 is arranged on A sections of B52（The width of hollow slots B54 is 0.05mm-
0.40mm, hollow slots zone length are 1mm-5mm, the i.e. length of A sections of B52）, along B sections in the engraved structure on the A sections of B52
Edge portions form several hollow-out parts 15, and the bore of the hollow-out parts 15 is more than other parts in engraved structure, adjacent hollow out
Bar segment is formed between portion 15（The linkage section of i.e. above-mentioned circumference array arrangement）, the bar segment is big along the length of elastomer axial direction
In the length in elastomer circumferential direction, such as Figure 10,11, it is compared to helically smoothly extending upwards in hollow slots B54
Elongated groove body, the hollow-out parts 15 in hollow slots B54 are a bigger spaces, altogether there are three, elastomer 5 is in radially
Adjacent 120 ° of arrangements, can make length of the linkage section in 5 axial direction of elastomer longer in this way, and deformation effect is more preferable, further increases
Add the deformability of the A sections of intersegmental handover regions of B52 and B, while handover region more concentrates the feedback of stress, makes pressure sensing
The dynamometry effect of device 7 is more preferable.
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 5 one end of the elastomer,
It is ring electrode that several mappings or the electrode of ablation of being used for are provided on the distal structure（Specifically include ring electrode A2, ring electrode
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 judged 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 also may be used
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
（It is 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 mutually parallel is provided in the elastomer 5 or head end electrode 1,
It can obtain the absolute spatial position of distal structure and pressure sensor 7 obtains 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 head end electrode 1 relatively is connected to one end of the catheter tube on the elastomer 5, the elastomer 5,
The Magnetic Sensor that at least two axis are not mutually parallel is provided in head end electrode 1 or catheter tube（Specifically include 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°）, it is magnetic coil in Magnetic Sensor A81, Magnetic Sensor B82 the present embodiment, elastomer is specifically mounted 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, induced current can be generated on Magnetic Sensor, by conducting wire feed back in 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 judge position and the rotational angle of conduit, enable conduit in ablation more
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 5 one end of the elastomer, the bullet
One end of the head end electrode 1 relatively is connected to one end of the catheter tube on property body 5, relative resilient on the catheter tube
One 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, Magnetic Sensor A81, Magnetic Sensor
B82 is arranged in catheter tube（It is not located in elastomer 5, reduces 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 that the engraved structure includes several
Setting and the continuous hollow slots of hollow-out part independently of each other, hollow slots are strip and to prolong elastomer 5 axial arranged（It is linear
Hollow slots）And the hollow slots A53 and hollow slots B54 different froms, the elastomer 5 of screw arrangement are similarly circular tube structure,
The shape of 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 sensing
Device B82）It is provided in together, Magnetic Sensor A81 and Magnetic Sensor B82 are that coil is coiled into shape of threads, two shape of threads
The Magnetic Sensor arranged crosswise of structure（Can mutually through or not through）, keep the axis of Magnetic Sensor A81 and Magnetic Sensor B82
It is not mutually parallel, while insulating layer is set outside the coil of Magnetic Sensor A81 and Magnetic Sensor B82, then intersect in this way
Magnetic Sensor A81 and Magnetic Sensor B82 can't influence the work of other side afterwards, can make Magnetic Sensor A81 and Magnetic Sensor B82
It is directly encapsulated into and is mounted in conduit together and then again, further save space, conduit can be made to be made thinner.
Claims (14)
1. a kind of ablation catheter with flexible distal, the distal end of the ablation catheter includes elastomer and pressure sensor, described
Elastomer is hollow out tubular structure, which is characterized in that the elastomer includes A sections and B sections, it is A sections described on be provided with end and prolong
It extends to B sections of engraved structure, forms several hollow-out parts along B sections of edge portions in engraved structure, the bore of the hollow-out parts is more than
Other parts in engraved structure form bar segment between adjacent hollow-out parts, and the bar segment is big along the length of elastomer axial direction
In the length in elastomer circumferential direction, the pressure sensor is arranged on the bar segment.
2. a kind of ablation catheter with flexible distal according to claim 1, which is characterized in that the engraved structure packet
Include several setting and continuous hollow slots of hollow-out part independently of each other.
3. a kind of ablation catheter with flexible distal according to claim 2, which is characterized in that the single hollow out
Slot is arranged in the shape of a spiral.
4. a kind of ablation catheter with flexible distal according to claim 2, which is characterized in that the elastomer is to engrave
Empty tubular structure, the shape of all hollow slots are identical.
5. a kind of ablation catheter with flexible distal according to claim 3, which is characterized in that the elastomer is circle
The shape of pipe structure, all hollow slots is identical.
6. a kind of ablation catheter with flexible distal according to claim 1-5 any one, which is characterized in that described
The handover region part of A sections and B sections be divided by several engraved structures arranged with elastomer central shaft circumference array it is several
Section linkage section.
7. a kind of ablation catheter with flexible distal according to claim 6, which is characterized in that the pressure sensor
It is fitted on the linkage section and sensor both ends is separately connected A sections and B sections.
8. a kind of ablation catheter with flexible distal according to claim 1, which is characterized in that the pressure sensor
For foil gauge.
9. a kind of ablation catheter with flexible distal according to claim 1, which is characterized in that further include：Head end electricity
Pole, the head end electrode are connected to described elastomer one end.
10. a kind of ablation catheter with flexible distal according to claim 8, which is characterized in that the elastomer or
The Magnetic Sensor that at least two axis are not mutually parallel is provided in head end electrode.
11. a kind of ablation catheter with flexible distal according to claim 1, which is characterized in that further include：Head end electricity
Pole and catheter tube, the head end electrode are connected to described elastomer one end, the relatively described head end electrode on the elastomer
One end is connected to one end of the catheter tube.
12. a kind of ablation catheter with flexible distal according to claim 11, which is characterized in that the elastomer,
The Magnetic Sensor that at least two axis are not mutually parallel is provided in head end electrode or catheter tube.
13. a kind of ablation catheter with flexible distal according to claim 11, which is characterized in that the head end electrode
It is provided with multiple fill orifices.
14. a kind of ablating device with pressure detecting function, which is characterized in that including：Head end electrode, catheter tube, rear end
The pressure sensor described in elastomer and claim 1 described in equipment, 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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| CN201710271307.9A CN108720919B (en) | 2017-04-24 | 2017-04-24 | A kind of ablation catheter with flexible distal |
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| CN201710271307.9A CN108720919B (en) | 2017-04-24 | 2017-04-24 | A kind of ablation catheter with flexible distal |
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| CN108720919B CN108720919B (en) | 2019-07-09 |
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| CN110160676A (en) * | 2018-02-11 | 2019-08-23 | 上海微创电生理医疗科技股份有限公司 | Pressure sensor and its electrophysiologicalcatheter catheter |
| CN114832201A (en) * | 2022-03-15 | 2022-08-02 | 介入科技发展(深圳)有限公司 | Catheter and system capable of identifying direction of blood vessel |
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| Publication number | Publication date |
|---|---|
| CN108720919B (en) | 2019-07-09 |
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Address after: No. 5, Wuke East 3rd Road, Wuhou District, Chengdu, Sichuan 610000 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. |