CN106806018A - A kind of ablation catheter - Google Patents
A kind of ablation catheter Download PDFInfo
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- CN106806018A CN106806018A CN201510870613.5A CN201510870613A CN106806018A CN 106806018 A CN106806018 A CN 106806018A CN 201510870613 A CN201510870613 A CN 201510870613A CN 106806018 A CN106806018 A CN 106806018A
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- foil gauge
- ablation catheter
- working end
- ablation
- circumferencial direction
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Abstract
The present invention relates to medical radio-frequency ablation techniques field, specifically related to a kind of ablation catheter, with a working end for stretching into body interior, working end is provided with least two foil gauges, two foil gauges arrange that particularly, two foil gauges are around working end circumferencial direction screw arrangement along the dislocation of working end circumferencial direction, in this way, the database formed by setting up test data can accurately determine contact force, crooked radian and the bending direction of conduit and tissue.
Description
Technical field
The present invention relates to medical radio-frequency ablation techniques field, and in particular to a kind of ablation catheter.
Background technology
Arrhythmia cordis, refers to that the normal rhythm of heart there occurs abnormal change, and is faster than normal cardiac rate (60-100
Beat/min) arrhythmia cordis then be referred to as tachyarrhythmia, clinically with palpitaition, it is nervous, uncomfortable in chest, weak,
Dizzy, dizzy etc. is main performance, and severe patient may occur in which that pectoralgia, expiratory dyspnea, limb cold sweat go out, realize funeral
The performances such as mistake, tic.Arrhythmia cordis is one of common disease of arrhythmia cordis in the world, the serious harm mankind
Health and influence quality of life, current catheter ablation oneself turn into one of its treatment means.
Catheter ablation also known as catheter ablation, the operation be under the monitoring of X-ray angiography machine,
By electrode catheter through vein or the arteries feeding chambers of the heart, first check that determination causes tachycardic anomaly sxtructure
Position, then local release high frequency electric in this place, produces temperature very high in the range of very little, leads to
Thermal efficiency is crossed, makes moisture evaporation in local organization, dry necrosis, reached blocking tachy-arrhythmia and pass extremely
Beam and originating point are led, therapeutic purposes are finally reached.
Radio-frequency ablation procedure has become radical cure paroxysmal tachycardia most efficient method at present, is demonstrate,proved by clinic
It is real melted only in the case of the electrode of distal end of catheter and the contact of cardiac muscular tissue are suitable can be only achieved compared with
Good therapeutic effect.When ablation catheter is treated, it is in inserting the catheter into heart, and makes distal end of catheter and heart
Inwall is contacted, and in the process it is generally important that making distal end of catheter carry out good contact with wall of the heart, is connect
, even there is heart wall when serious in the excessive worthless irreversible damage easily caused to heart tissue of touch pressure
Perforation, and the too small therapeutic purposes for being then unable to reach thorough ablation of contact, ablation effect are bad.
Existing technology mostly measures the contact of distal end of catheter and tissue using electromagnetism or optical technology, its
Equipment requirement is higher and complexity, and manufacturing cost is also of a relatively high.There is technology to add in the catheter at present and use magnetic
The sensor of sensing carrys out the contact force of sensing tube distal end and organ, and this sensor is in the application easily by the external world
The interference in magnetic field and distortion, the accuracy of measurement are needed in catheter distal by external interference, and the technology easily
Multiple Magnetic Sensors are installed, technology difficulty is big, is more expensive to manufacture in the little space of end.
In sum, it is difficult to accurately measure the contact of ablation catheter and wall of the heart at present, it is difficult to it is determined that
Whether ablation catheter is suitable with the contact of wall of the heart, it is difficult to control ablation effect.
Therefore, a kind of technology that can accurately measure ablation catheter and the contact of wall of the heart is needed badly.
The content of the invention
It is an object of the invention to：For being difficult to accurately measure contact pressure of the ablation catheter with wall of the heart at present
A kind of problem of power, there is provided ablation catheter that can accurately measure ablation catheter and the contact of wall of the heart.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of ablation catheter, a kind of ablation catheter, with a working end for stretching into body interior, its feature exists
In：The working end sets at least two foil gauges, and foil gauge described at least two is in the working end circumference
Misplace arrangement on direction, and particularly, foil gauge described at least three misplaces on the working end circumferencial direction
Arrangement, more particularly, the foil gauge is arranged in the working end end face 30mm.
In this programme, in working end at least provided with two foil gauges misplaced along its circumferencial direction, in this way,
The stress value that can be measured according to all foil gauges determines the stress at ablation catheter patch foil gauge, is answered all
The stress value that change piece is measured is used as one group of stress data group, in this way, ablation catheter stress is different, ablation catheter
Crooked radian is different, and stress data group is also just different, that is to say, that stress data group is with conduit stress value
One-to-one relationship.
When this programme is implemented, stress of the ablation catheter in various pressure and various bending directions is obtained first
Data group, every group of stress data includes that the stress value of all foil gauges is constituted, and containing positive and negative, will obtain data
Be organized into database purchase in a device by corresponding relation, measurement ablation catheter stress, bending direction and
Searched in database according to stress data group during crooked radian, according to uniqueness, one group of stress data group is only
A corresponding power, bending direction and crooked radian can be found in database matching, in this way, with regard to energy
Enough realize that the accurate of ablation catheter pressure, bending direction and crooked radian measures, can determine ablation catheter with
Whether the contact of wall of the heart is suitable, can more easily control ablation effect.
The foil gauge is arranged in the working end end face 30mm, in this way, foil gauge is substantially disposed in
Near the working end end face, conduit test pressure, bending direction and arc of curvature more can be accurately measured
Degree.
Preferably, strained described at least two in conduit circumferencial direction interval angles θ=90 ° or
θ=120 °, so, it is possible further to improve the ablation catheter test pressure, bending direction and arc of curvature
The accuracy of degree.
Preferably, the working end sets elastic member, the foil gauge is arranged on the elastic component
On, particularly, the elastic component profile is cuboid, also, four ribs of its length direction are justified
Angling, the elastic component raw material are stainless steel or Nitinol, so, it is possible to allow ablation catheter to receive
Bend bent and can quickly be back to nature after stress removal, meanwhile, it is capable to allow ablation catheter in phase
Bigger with deflection under stressing conditions, can allow the strain built-in testing being arranged on elastic component is sensitiveer can
Lean on, whether so, it is possible ablation catheter is determined more accurately suitable with the contact of wall of the heart.
The elastic component profile is vertical prismatic shape, so, it is possible more to facilitate foil gauge is fitted in into elasticity
On the side of component, further, incline can be by fillet；Certainly, the profile of elastic component can also be
Cylindrical shape, that is to say, that elastic component can be shaft-like or column, so, it is possible convenient processing and facilitates
Coordinated with conduit.
Elastic component is made of stainless steel, mainly considers its low raw-material cost, and the elasticity after being made
Component has favorable elasticity, disclosure satisfy that the primary demand of stress test；Further, elastic component is used
Nitinol is made, and Nitinol is a kind of marmem, can be by the plastic deformation of itself in a certain spy
Determine to be automatically restored at temperature the special alloy of original-shape, the expansion and contraction of Nitinol more than 20%, fatigue
Life-span, damping characteristic was higher than common spring 10 times up to 10,000,000, and its corrosion resistance is better than many medical stainless
Steel, with good elasticity, so, it is possible to further enhance the elasticity of elastic component, increases foil gauge and surveys
The sensitivity of power, makes power more accurate with the measurement of bending direction.
Preferably, being provided with three foil gauges on the elastic component, three foil gauges are along the work
Make end circumferencial direction dislocation arrangement, in this way, the stress data that can be measured this three groups of foil gauges is used as one group
Stress data group, measures data as one group of stress data group, due to many compared to two foil gauges of use
One foil gauge measures data, and each foil gauge is arranged on the diverse location of elastic component, therefore phase
When in increased an assistance data, so, it is possible to allow the application ablation catheter dynamometry, bending direction and curved
The accuracy of bent radian is higher.
Further, three foil gauges are arranged on the elasticity around the ablation catheter circumferencial direction spiral
On component, in this way, three foil gauges misplace along the working end circumferencial direction arrange, also, three
The foil gauge misplaces along the working end axis direction and arranges, so, it is possible to further enhance the ablation
The accuracy of conduit test pressure, bending direction and crooked radian.
Preferably, three strains in conduit circumferencial direction interval angles θ=90 ° or
θ=120 °, so, it is possible further to improve the ablation catheter test pressure, bending direction and arc of curvature
The accuracy of degree.
Preferably, two strains are in the conduit circumferencial direction interval angles θ1=90 °, another institute
One among foil gauge and two other described foil gauge is stated in the conduit circumferencial direction interval angles
θ2=120 °, so, it is possible further to improve the ablation catheter test pressure, bending direction and arc of curvature
The accuracy of degree.
Preferably, on the corresponding elastic component of foil gauge described at least one, justifying along the working end
Circumferential direction is provided with helicla flute, that is to say, that the elastic component has along the working end circumferencial direction
Helicla flute, the helicla flute is arranged on below the foil gauge, is made below foil gauge described at least one
With the helicla flute, particularly, all foil gauges are respectively provided with the helicla flute.
In this programme, elastic component has the helicla flute around working end circumferencial direction, so, it is possible further
Increase the elasticity of elastic component, meanwhile, foil gauge is arranged on helicla flute, that is to say, that foil gauge
Center is placed in the groove top of helicla flute, and the groove of helicla flute is placed between foil gauge two ends, that is to say, that foil gauge
Two ends still fitted with the surface of elastic component, simply the central area of foil gauge not with elastic component paste
Close, in vacant state.
In this programme, helicla flute is set on elastic component, helicla flute can be allowed to turn into the stress of elastic component
Concentrated area, foil gauge is placed on the helicla flute with stress concentration effect, so, it is possible to allow foil gauge
Measure data sensitiveer, the ablation catheter test pressure, bending direction and bending can be further enhanced
The accuracy of radian.
Preferably, all foil gauges set the helicla flute, the foil gauge is along the helicla flute spiral shell
Rotation is arranged on the elastic component, so, it is possible to further enhance the ablation catheter test pressure, curved
The accuracy of Qu Fangxiang and crooked radian.
Preferably, also setting up elasticity between the corresponding foil gauge of at least one described helicla flute
Thin slice, that is to say, that the elastic sheet is arranged on the elastic component, also, the elastic sheet
A part for the helicla flute is covered, the foil gauge is arranged on the elastic sheet, that is to say, that institute
Elastic sheet is stated to be arranged on the elastic component.Elasticized thin sheet material is made up of stainless steel or Nitinol,
Its thickness is 0.02-0.07mm, with enough elasticity and flexibility, is attached to the helicla flute of elastic component
After upper, the burnishing surface on elastic sheet can easily place foil gauge, simultaneously because helicla flute is elastic structure
Region of stress concentration on part, elastic sheet is arranged on helicla flute, and elastic sheet also turns into elastic component
Region of stress concentration.
Therefore, compared to no elastic sheet, the central area of the foil gauge being arranged on elastic sheet will not
Vacantly, can be good at being fitted with elastic sheet, simultaneously as elastic sheet is also the stress of elastic component
Concentrated area, can so allow the foil gauge stress curve being arranged on elastic sheet continuous, can be further
Strengthen the accuracy of the ablation catheter test pressure, bending direction and crooked radian.
Further, elastic sheet is provided between the elastic component and all reinforcement foil gauges, in this way,
The accuracy of the ablation catheter test pressure, bending direction and crooked radian can be further enhanced.
Preferably, the elastic component is wrapped with flexible pipe body, that is to say, that elastic component is arranged on
In the inner chamber of flexible pipe body, including foil gauge and elastic sheet on elastic component are arranged on, in this way, should
Become piece to isolate with tissue, the security and operating performance of the ablation catheter can be strengthened.
Preferably, the foil gauge is each equipped with secondary foil gauge, the secondary foil gauge is used to eliminate described answering
Become the temperature error of piece.The temperature error of foil gauge is primarily due to temperature and additional answering can be produced to working strain gauge
Become, make the presence of error between test and actual value, accordingly, it would be desirable to increase secondary foil gauge, be arranged on for surveying
The foil gauge annex of power is tried, the nearlyer effect in position is better.
Preferably, being provided with Magnetic Sensor on the elastomer, the Magnetic Sensor is arranged in magnetic field,
So, it is possible accurately to determine particular location of the conduit in heart, can accurately determine the position residing for ablation catheter
Whether be set ablation locations, so, it is possible to further enhance and melted using the ablation catheter if putting
The ablation effect of operation.
Preferably, after the ablation catheter coordinates with sheath, the bending section of the ablation catheter is conduit
Bending section, end face to the guiding-tube bend section of the working end of the ablation catheter is conduit free segment, described
The other parts of the working end of ablation catheter are the nearly means of conduit, the free segment, the bending section and described
Nearly means are respectively provided with least one ring electrode, and the ring electrode is set in the electric field.
This programme is so designed that, guiding-tube bend section, conduit free segment that it can in real time determine ablation catheter
With the nearly means of conduit heart particular location, that is to say, that can show that ablation is led on screen in real time
The curved shape of pipe, in this way, just can determine ablation catheter conduit free segment whether the room with fossa ovalis
It is whether vertical every face, that is to say, that puncture needle can puncture atrial septum face with the direction vertical with atrial septum face,
In this way, need not determine that the conduit free segment of ablation catheter is using traditional X-ray development when puncturing
It is no vertical with atrial septum face, X-ray can be reduced while puncture success rate is improved to patient and medical care people
The radiation injury of member.
In sum, by adopting the above-described technical solution, the beneficial effect of the application is：
1st, the contact force of ablation catheter and tissue can accurately be determined, therefore, it is possible to accurately judge contact force
If appropriate for ablation；
2nd, the bending direction and crooked radian of ablation catheter can accurately be determined；
The beneficial effect of the application other embodiment is：Further enhancing the ablation catheter test pressure,
The accuracy of bending direction and crooked radian, further, it is possible to strengthen the function of the ablation catheter.
Brief description of the drawings
Fig. 1 is the structural representation of the application；
Fig. 2 is the partial enlarged drawing of B in Fig. 1；
Fig. 3 is the sectional drawing of A in Fig. 1；
Fig. 4 is the structural representation of the application；
Marked in figure：1- elastic components, 11- helicla flutes, 2- foil gauges, 21- pair foil gauges, 3- Thin Elastics
Piece, 4- flexible pipe bodies, 5- Magnetic Sensors, 6- ring electrodes, 7- fill orifices, 8- intrusion pipes, 9- TEMPs
Device.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing and reality
Example is applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
It is used to explain the present invention, is not intended to limit the present invention.
Embodiment 1：
As Figure 1-4, a kind of ablation catheter, with a working end for stretching into body interior, the work
End sets elastic member 1, and the elastic component has the helicla flute 11 around the working end circumferencial direction,
Three foil gauges 2 are arranged on the elastic component 1 along the helicla flute 11, the elastic component 1 and institute
Setting elastic sheet 3 between foil gauge 2 is stated, the elastic component 1 is wrapped with flexible pipe body 4, described to answer
Become piece 2 and be each equipped with secondary foil gauge 21, the temperature that the secondary foil gauge 21 is used to eliminate the foil gauge 2 is missed
Difference, is provided with Magnetic Sensor 5 on the elastomer, the Magnetic Sensor 5 is arranged in magnetic field, the ablation
After conduit coordinates with sheath, the bending section of the ablation catheter is guiding-tube bend section, the ablation catheter
The end face of working end to the guiding-tube bend section be conduit free segment, the working end of the ablation catheter other
Part is the nearly means of conduit, and the free segment, the bending section and the nearly means are respectively provided with a ring electrode 6,
The ring electrode 6 is set in the electric field, and the ablation catheter end has fill orifice 7, in the ablation catheter
Intrusion pipe 8 is additionally provided with chamber, is used to separate eliminating medicine liquid and wire, foil gauge 2 etc., while will can disappear
Melt liquid and be guided to fill orifice 7, the ablation catheter end is additionally provided with temperature sensor 9, is used to detect ablation
The situation that tissue temperature near end of conduit is melted with Real-time Feedback.
Embodiment 2：
In structure as described in Example 1, three strains are in the conduit circumferencial direction interval angles
θ=90 °, i.e., shown in Fig. 3；Or three strains are in the conduit circumference square degree θ1=90 ° 90
Angle is spent, among another described foil gauge and two other described foil gauge is in the conduit circumference
Direction interval angles θ2=120 °.
Embodiment 3：
In structure as described in Example 1, also there is foil gauge on the elastic component, foil gauge sets and gets over
Many, forming the foil gauge of one group of stress data group, to measure data more, and measurement can be more accurate, can enter one
Step improves the accuracy of the ablation catheter test pressure, bending direction and crooked radian.
All any modification, equivalent and improvement made within the spirit and principles in the present invention etc., all should
It is included within protection scope of the present invention.
Claims (16)
1. a kind of ablation catheter, with a working end for stretching into body interior, it is characterised in that：The work
End sets at least two foil gauges, and foil gauge described at least two misplaces cloth on the working end circumferencial direction
Put.
2. conduit according to claim 1, it is characterised in that：The working end sets elastic member,
Two foil gauges are arranged on the elastic component.
3. ablation catheter according to claim 2, it is characterised in that：Have three on the elastic component
Individual foil gauge, three foil gauges misplace along the working end circumferencial direction and arrange.
4. the ablation catheter according to Claims 2 or 3, it is characterised in that：Strained described at least one
On the corresponding elastic component of piece, the working end circumferencial direction is provided with helicla flute.
5. ablation catheter according to claim 4, it is characterised in that：Each described foil gauge correspondence
The elastic component on, the working end circumferencial direction is all provided with helicla flute.
6. the ablation catheter according to claim 4 or 5, it is characterised in that：At least one described spiral shell
Elastic sheet is also set up between the corresponding foil gauge of spin slot.
7. ablation catheter according to claim 1, it is characterised in that：Strained described at least two in institute
State conduit circumferencial direction interval angles θ=90 ° or θ=120 °.
8. ablation catheter according to claim 3, it is characterised in that：Three strains are led described
Pipe circumferencial direction interval angles θ=90 ° or θ=120 °.
9. ablation catheter according to claim 3, it is characterised in that：Two strains are led described
Pipe circumferencial direction interval angles θ1=90 °, among another described foil gauge and two other described foil gauge
One in the conduit circumferencial direction interval angles θ2=120 °.
10. the ablation catheter according to claim 2,3 or 5, it is characterised in that：The elastic component
It is wrapped with flexible pipe body.
11. ablation catheters according to claim 4, it is characterised in that：The elastomer is wrapped with
Flexible pipe body.
12. ablation catheters according to claim 6, it is characterised in that：The elastomer is wrapped with
Flexible pipe body.
13. ablation catheter according to claim 1,2,3,5,11 or 12, it is characterised in that：
The foil gauge is each equipped with secondary foil gauge, and the secondary foil gauge is used to eliminate the temperature error of the foil gauge.
14. ablation catheters according to claim 4, it is characterised in that：The foil gauge is each equipped with
Secondary foil gauge, the secondary foil gauge is used to eliminate the temperature error of the foil gauge.
15. ablation catheters according to claim 6, it is characterised in that：The foil gauge is each equipped with
Secondary foil gauge, the secondary foil gauge is used to eliminate the temperature error of the foil gauge.
16. ablation catheters according to claim 10, it is characterised in that：The foil gauge is each equipped with
Secondary foil gauge, the secondary foil gauge is used to eliminate the temperature error of the foil gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870613.5A CN106806018A (en) | 2015-12-01 | 2015-12-01 | A kind of ablation catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870613.5A CN106806018A (en) | 2015-12-01 | 2015-12-01 | A kind of ablation catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106806018A true CN106806018A (en) | 2017-06-09 |
Family
ID=59108505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510870613.5A Pending CN106806018A (en) | 2015-12-01 | 2015-12-01 | A kind of ablation catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106806018A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3841150A (en) * | 1973-11-02 | 1974-10-15 | Honeywell Inc | Strain gauge transducer signal conditioning circuitry |
| CN102160909A (en) * | 2009-12-28 | 2011-08-24 | 韦伯斯特生物官能(以色列)有限公司 | Catheter with strain gauge sensor |
| CN103908334A (en) * | 2012-12-31 | 2014-07-09 | 上海微创电生理医疗科技有限公司 | Multi-electrode ablation catheter |
| CN203915066U (en) * | 2014-06-06 | 2014-11-05 | 乐普（北京）医疗器械股份有限公司 | A kind of medical catheter head end that can measuring pressure |
| CN204072317U (en) * | 2014-09-02 | 2015-01-07 | 上海微创电生理医疗科技有限公司 | A kind of ablation catheter |
| AU2015202549A1 (en) * | 2009-12-28 | 2015-05-28 | Biosense Webster (Israel), Ltd. | Catheter with strain gauge sensor |
| CN204636531U (en) * | 2015-04-30 | 2015-09-16 | 上海微创电生理医疗科技有限公司 | Radio frequency ablation catheter |
| CN204744408U (en) * | 2015-06-30 | 2015-11-11 | 四川锦江电子科技有限公司 | Melt device with pressure detection |
-
2015
- 2015-12-01 CN CN201510870613.5A patent/CN106806018A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3841150A (en) * | 1973-11-02 | 1974-10-15 | Honeywell Inc | Strain gauge transducer signal conditioning circuitry |
| CN102160909A (en) * | 2009-12-28 | 2011-08-24 | 韦伯斯特生物官能(以色列)有限公司 | Catheter with strain gauge sensor |
| AU2015202549A1 (en) * | 2009-12-28 | 2015-05-28 | Biosense Webster (Israel), Ltd. | Catheter with strain gauge sensor |
| CN103908334A (en) * | 2012-12-31 | 2014-07-09 | 上海微创电生理医疗科技有限公司 | Multi-electrode ablation catheter |
| CN203915066U (en) * | 2014-06-06 | 2014-11-05 | 乐普（北京）医疗器械股份有限公司 | A kind of medical catheter head end that can measuring pressure |
| CN204072317U (en) * | 2014-09-02 | 2015-01-07 | 上海微创电生理医疗科技有限公司 | A kind of ablation catheter |
| CN204636531U (en) * | 2015-04-30 | 2015-09-16 | 上海微创电生理医疗科技有限公司 | Radio frequency ablation catheter |
| CN204744408U (en) * | 2015-06-30 | 2015-11-11 | 四川锦江电子科技有限公司 | Melt device with pressure detection |
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Application publication date: 20170609 |
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