CN106308920B - A kind of ablation catheter - Google Patents
A kind of ablation catheter Download PDFInfo
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- CN106308920B CN106308920B CN201510385924.2A CN201510385924A CN106308920B CN 106308920 B CN106308920 B CN 106308920B CN 201510385924 A CN201510385924 A CN 201510385924A CN 106308920 B CN106308920 B CN 106308920B
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- tube body
- ablation catheter
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- compliant member
- pressure
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Abstract
The present invention relates to ablation fields, in particular to a kind of ablation catheter, it includes flexible tube body, the electrode for ablation tissue is provided on tube body, tubular body is provided with intrusion pipe, intrusion pipe is connected to tube wall and can be poured out liquid from tube wall, ablation catheter further includes compliant member and sensor, the end of tube body is individual one section of material, it is connected in the main body of tube body by compliant member, compliant member is configured to be applied to the power of the end of tube body with tissue and deform, sensor is provided between the end and compliant member of tube body, the sensor can generate corresponding signal according to deformation, the purpose of the present invention is to provide a kind of structure is simple, manufacturing cost is relatively low, pressure measurement is directly accurate, a kind of better ablation catheter of ablation effect.
Description
Technical field
The present invention relates to ablation field, in particular to a kind of ablation catheters.
Background technique
Arrhythmia cordis is common one of the disease of arrhythmia cordis in the world, and clinically application catheter has carried out radio-frequency ablation procedure
It is widely used in treating such disease, the position and surrounding myocardium that RF energy passes through conduit to electrode and electrode contact
Tissue is only disappeared under the conditions of the contact pressure of the electrode of distal end of catheter and cardiac muscular tissue is suitable with melting by clinic confirmation
Melt and can be only achieved preferable therapeutic effect.
It is to insert the catheter into heart, and contact distal end of catheter with wall of the heart in ablation catheter treatment, mistake herein
It is generally important that making the good contact wall of the heart in the distal end of conduit, otherwise, excessive pressure may cause to heart in journey
Worthless damage or even heart wall is organized to perforate, and too small pressure is then unable to reach the therapeutic purposes thoroughly melted.
Existing technology is that the pressure that reclines of distal end with tissue is measured using electromagnetism or optical technology, to equipment requirement
It is higher and complicated, manufacturing cost also relatively high
Carry out sensing tube using the sensor of magnetic induction as mentioned being added in the catheter in Chinese patent CN103908337AZ
The contact force of distal end and organ, this sensor are distorted vulnerable to the interference of external magnetic field in the application, and the technology needs
Multiple Magnetic Sensor technology difficulties are installed big in the minimum space of catheter distal tip, to increase manufacturing cost.
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 that a kind of structure is simple, manufacture
Advantage of lower cost, pressure measurement a kind of directly and accurately 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 is used for ablation tissue inserted into the patient comprising flexible tube body, the tube body
On be provided with electrode for melting the tissue, the tubular body is provided with intrusion pipe, the intrusion pipe and tube wall
It being connected to and can be poured out liquid from tube wall, the ablation catheter further includes compliant member and sensor,
The end of the tube body is individual one section of material, is connected in the main body of tube body by the compliant member,
The compliant member is configured to deform, the end of the tube body with the power for organizing the end for being applied to the tube body
Sensor is provided between compliant member, the sensor can generate corresponding signal according to deformation.
Structure of the invention be the main body of tube body, compliant member, sensor, tube body end segment set gradually, structure
Simply, manufacturing process is simpler compared with the prior art, and cost is lower；
The power that tissue is applied to the end of the tube body simultaneously is directly conducted on a sensor, very directly by end
Connect, accurately measure power size (be normally set up the numerical value of a power, in the power or so of x size, the patch of measurement distal end and tissue
Depended on pressure is the most suitable, and therapeutic effect is more preferable), compared to passing through one again after other, the common bending deformations by compliant member
Kind method measurement power output size (needs to convert process, the power usually measured is less than the pressure that actual tube body end receives, and leads to
Crossing a conversion, to show that a numerical value judges whether again up to standard) as structure, dynamometry mode of the invention is more direct, standard
It really (measures and how much is exactly how many, reduce conversion process, while more acurrate), ablation effect is more preferable, while structure is simpler, cost
It is lower,
As a preferred solution of the present invention, ablation catheter is cyclic structure, is evenly distributed with multiple sensors thereon, described
Cyclic structure is arranged for that the pressure from perpendicular to cyclic structure can be received
As a preferred solution of the present invention, the end of the tube body is connected with compliant member by sensor, the sensing
Device is configured to be deformed by the pressure from the end of the tube body, and can measure that the end of tube body is subject to is radial
Power, sensor directly as a connector, structure is simpler, and manufacturing cost is lower, and dynamometry effect is more preferable, i.e. ablation effect
Fruit also can be more preferable.
As a preferred solution of the present invention, the compliant member is made of flexible plastic material, light-weight, cost
It is low.
As a preferred solution of the present invention, the flexible member material is metal, is provided with spiral on compliant member outer wall
The slot (deforming and can be back to after removing the pressure nature for changing compliant member with external force) of shape, metal portion
For part for " the flexible plastic cement ", the service life is longer, while also more stable.
As a preferred solution of the present invention, the compliant member outer wall and sensor outer wall are provided with flexible pipe body, described
Flexible pipe body is deformed with compliant member is synchronous, is separated compliant member and sensor with tissue, is shielded.
As a preferred solution of the present invention, the end outer wall of the tube body is provided with end electrodes or end electrodes structure
At the end of tube body, inventive sensor is pressure of the tissue measured directly to the end of tube body, so in the end of tube body
Upper arrangement electrode, the pressure that measures of cooperation sensor, chance control obtains more preferably accurate when to the ablation of electrode, and ablation effect is more
It is good.
As a preferred solution of the present invention, several end electricity being connected to the intrusion pipe are provided in the end electrodes
Pole fill orifice helps radiography or other functions for liquid to be perfused in ablation.
As a preferred solution of the present invention, the end electrodes have mapping function, include at least one on the tube body
Section is deflected, the electrode for having mapping function is provided at the deflection section, the electrode in the end electrodes and deflection section is simultaneously
Have mapping function, then cooperation sensor (it is known that the end of tube body whether perpendicular to tissue or at how many angle, also
By the direction of patch), in conjunction with the length of tube body between deflection section and end electrodes itself, there are also the electricity in end electrodes and deflection section
Pole institute's mapping come out position, can in the hope of the specific location of ablation catheter, help doctor it is more preferable melt or other
Surgical procedure, compared with prior art (end for not knowing ablation catheter and tissue surface at what angle, entire ablation catheter
Bending state, the full experience for depending on doctor are easy to cause to damage to tissue, while therapeutic effect cannot effectively guarantee), effect
More preferably.
As a preferred solution of the present invention, the sensor is piezoresistive transducer, is provided with several on ablation catheter
Pressure detecting region is provided with strain in the pressure detecting region for detecting the pressure from the end of the tube body
It counts (i.e. sensor), the different data measured by the strain that different pressures monitor region can determine that after being converted by algorithm
The position (whether perpendicular to tissue or at how many angle, there are also the directions by pasting) of end electrodes, magnetic strength compared with prior art
Answer, not by external electrical field or magnetic interference, can accurately and effectively ablation tissue lesions position.
As a preferred solution of the present invention, the tube body drives bending by its internal traction steel wire, and tubular body is also set
It is equipped with electrode cable, sensor conductor, the electrode cable is connect with electrode, and the sensor conductor is connect with sensor.
Compared with prior art, beneficial effects of the present invention:
Structure is simple, manufacturing cost is relatively low, pressure measurement is directly accurate, ablation effect is more preferable.
Detailed description of the invention:
Fig. 1 is ablation catheter working state schematic representation of the present invention；
Fig. 2 is ablation catheter structural schematic diagram of the present invention；
Fig. 3 is the explosive view of ablation catheter structure of the present invention；
Fig. 4 is the cross-sectional view of ablation catheter of the present invention；
Fig. 5 is inventive sensor structural schematic diagram；
Fig. 6 is ablation catheter unbent condition schematic diagram of the present invention；
Fig. 7 is ablation catheter bending state schematic diagram of the present invention；
Fig. 8 is that ablation catheter of the present invention deflects section operation schematic diagram；
Fig. 9 is that implement body dynamometry schematic diagram is sensed in the embodiment of the present invention；
Figure 10 is the operating process schematic diagram that the present invention uses ablation catheter；
Figure 11 main body tube cross-sectional view；
Figure 12 conduit overall schematic；
Marked in the figure: 1- end electrodes, the distal end 2- annular electrode A, 3- annular electrode B, 4- annular electrode C, 5- tube body, 6-
Flexible pipe body, 7- compliant member, 8- intrusion pipe, 9- sensor, 10- traction steel wire, 11- fill orifice, 12- sensor conductor, 13-
Electrode cable, 14- temperature sensor, 15. main body tube, 16. handle, 17. female Luer, 18. connector 21- annular electrode D, 22- ring
Shape electrode E, 91- pressure detecting region X, 92- pressure detecting region Y, 93- pressure detecting region Z.
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
Such as Fig. 2,3,11, a kind of ablation catheter, being used for ablation tissue inserted into the patient, (such as Fig. 1, dash area are behaved
Body tissue, ablation catheter is reclining in figure) comprising flexible tube body (is drawn by the intracorporal traction steel wire 10 of pipe
Dynamic bending, 10 one end of traction steel wire are connected on tube body, and the other end can artificially control pulling, determine with the link position of tube body
Determine the curved shape of tube body), the electrode for melting the tissue is provided on the tube body, the tubular body is provided with
Intrusion pipe 8, the intrusion pipe 8 are connected to tube wall and can be poured out from tube wall liquid, and the ablation catheter is also
Including compliant member 7 and sensor 9；
The end of the tube body is individual one section of material, is connected in the main body of tube body by the compliant member 7,
The end outer wall of the tube body is provided with the end that end electrodes 1 or end electrodes 1 constitute tube body, in the end electrodes 1
Several 1 fill orifices 11 of end electrodes being connected to the intrusion pipe 8 are provided with, the compliant member 7 is configured to can be with described
Tissue is applied to the power of the end of the tube body and deforms, and is provided with sensor 9 between the end and compliant member 7 of the tube body
(it is hollow discoidal sensor, and both ends cooperate the shape of the contact surface of compliant member 7 and the contact surface of the end of tube body
Shape), the sensor 9 is configured to be deformed by the pressure from the end of the tube body.
The end of the tube body and compliant member 7 are connected by sensor 9, and the sensor 9 is piezoresistive transducer, are disappeared
Melt and be provided with several pressure detecting regions on conduit, for detecting the pressure from the end of the tube body, pressure detecting
Sensor 9 is provided on region, the present embodiment is strain gauge, and the strain gauge is mounted in the pressure detecting region, described
Strain gauge can generate corresponding signal according to the deformation of the sensor 9；
Such as Fig. 5, the pressure monitoring region is divided into pressure monitoring region X91, pressure monitoring region Y92, pressure monitoring area
Domain Z93 is three in the present embodiment, actual conditions can be it is more, by pressure monitoring region X91, pressure monitoring region Y92,
The pressure value that pressure monitoring region Z93 is detected respectively is converted to obtain pipe described in the opposite proximal end tube body 5(of end electrodes 1
The main body of body is distal end tube body 5 close to one section of tube body end) deformation direction, such as (Fig. 9), measured value pressure detecting area
Domain detected value is respectively X, Y, Z, and wherein X > Y > Z, shows more to be bent toward the direction more greatly, in the area XY since certain side is pressed up power
On domain, the stress point that 1-X/ (X+Y) is XY area segments is selected, by this one straight line of strokes and dots and passes perpendicularly through XY connection, so just
Determined the region XY by the line of force, draw the region YZ and XZ in this way by the line of force, the trizonal area intersected by the line of force
Domain is the stress point of end electrodes, and the opposite direction of stress point is bending direction, and the above are the basic detection of which originals
Reason, such as above-mentioned, when actual measurement and operation can be more pressure detecting regions and more accurate calculation.
The main body of the tube body is distal end tube body 5 close to one section of tube body free segment, and the compliant member 7 is connected to distal end
On tube body 5, annular electrode A2, annular electrode B3, annular electrode C4 are positioned apart from distal end tube body 5, three electrodes
Can have mapping function, while the tissue around distal end tube body 5 can be melted, make the ablation area of ablation catheter more
Greatly.
7 material of compliant member is metal, is cylindrical member, is provided on 7 outer wall of compliant member spiral
Slot enables compliant member 7 to deform with the pressure change of tube body end.
7 outer wall of compliant member and 9 outer wall of sensor are provided with flexible pipe body 6, and the flexible pipe body 6 is with compliant member
7 synchronous deformations, 6 material of flexible pipe body are the relatively soft material of PVC or other.
In the present embodiment, the end electrodes 1 have mapping function, include that at least one deflects section (not on the tube body
There is deflection section, such as Fig. 7 when bending such as Fig. 6, after bending), the electrode for having mapping function, this reality are provided at the deflection section
Apply example deflection section be two, and deflect section on be provided with corresponding annular electrode D21, annular electrode E22(i.e. described in have
The electrode of mapping function), in the accuracy for needing to improve the monitoring to ablation catheter position, can define according to the actual situation more
More deflection sections, while the corresponding annular electrode for having mapping function, such as Fig. 8,1 He of end electrodes are set in deflection section
Annular electrode D21, annular electrode E22 are provided simultaneously with mapping function, then the end for cooperating sensor 9(to be known that tube body is
It is no perpendicular to tissue or at how many angle, there are also by the direction of patch), in conjunction with deflecting itself tube body between section and end electrodes 1
Length, there are also the positions that end electrodes 1 and annular electrode D21, annular electrode E22 institute's mapping come out, can be in the hope of ablation catheter
Specific location, help doctor so more preferable that melt or other surgical procedures.
Such as Fig. 4, the tubular body is additionally provided with electrode cable 13, sensor conductor 12, the electrode cable 13 and electricity
Pole connection energizes to electrode or transmits data, and the sensor conductor 12 connect with sensor 9, sensor 9 is energized or
Transmit data.
Such as Figure 10, specific work process are as follows:
The end electrodes 1 recline tissue, and tissue makes the deformation of sensor 9 generate pressure, pressure the contact force of end electrodes 1
Power monitoring region X91, pressure monitoring region Y92, sensors X, Y, Z in pressure monitoring region Z93(, that is, figure) detection obtains telecommunications
Number value detects conduit bending in conjunction with annular electrode D21 and annular electrode E22 and end electrodes 1, above data is transmitted to
Equipment carries out operation, determines 1 direction of gross pressure numerical values recited and end electrodes by ring segment, adjusts to being able to carry out ablation
Condition is melted.
It is the single unit system schematic diagram after the application ablation catheter and other component engaged therewith installation such as Figure 12, this
Embodiment ablation catheter is connected on main pipe 15, and main pipe is connected on handle 16, and female Luer 17 connects intrusion pipe 8, is used
In the channel of conveying perfusion liquid.Connector 18 with equipment for being attached.
Claims (6)
1. a kind of ablation catheter is used for ablation tissue inserted into the patient comprising flexible tube body, on the tube body
It is provided with the electrode for melting the tissue, the tubular body is provided with intrusion pipe, and the intrusion pipe and tube wall connect
It is logical and liquid can be poured out from tube wall, which is characterized in that the ablation catheter further includes compliant member and sensor,
The end of the tube body is individual one section of material, is connected in the main body of tube body by the compliant member, described
Compliant member is configured to deform, the end of the tube body and soft with the power for organizing the end that be applied to the tube body
It is provided with piezoresistive transducer between property component, the piezoresistive transducer can generate corresponding signal according to deformation, end
It is provided with the temperature sensor for being used for real-time monitoring end electrodes surface temperature on electrode, 3 pressures are provided on ablation catheter
Power monitors region, and for monitoring the pressure from the end of the tube body, the pressure monitoring region is divided into pressure monitoring area
Domain X, pressure monitoring region Y, pressure monitoring region Z, the piezoresistive transducer are separately positioned on pressure monitoring region X, pressure
It monitors in region Y and pressure monitoring region Z, pressure monitoring region X, pressure monitoring region Y, pressure monitoring region Z can be passed through
The pressure value monitored respectively is converted to obtain the deformation direction of the opposite proximal end tube body of end electrodes.
2. a kind of ablation catheter according to claim 1, which is characterized in that the flexible member material is metal, flexible
Spiral slot is provided on component outer wall.
3. a kind of ablation catheter according to claim 1, which is characterized in that the compliant member outer wall, pressure resistance type sensing
Device and temperature sensor outer wall are provided with flexible pipe body, and the flexible pipe body is deformed with compliant member is synchronous.
4. a kind of ablation catheter according to claim 1, which is characterized in that be provided with several and institute in the end electrodes
State the end electrodes fill orifice of intrusion pipe connection.
5. a kind of ablation catheter according to claim 1, which is characterized in that the end electrodes have mapping function, institute
It states and deflects section comprising at least one on tube body, be provided with the electrode for having mapping function at the deflection section.
6. a kind of ablation catheter according to claim 1, which is characterized in that the tube body is by its internal traction steel wire band
Dynamic bending, tubular body are additionally provided with electrode cable, piezoresistive transducer conducting wire and temperature sensor lead, the electrode cable
It is connect with electrode, the sensor conductor is connect with sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510385924.2A CN106308920B (en) | 2015-06-30 | 2015-06-30 | A kind of ablation catheter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510385924.2A CN106308920B (en) | 2015-06-30 | 2015-06-30 | A kind of ablation catheter |
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| CN106308920A CN106308920A (en) | 2017-01-11 |
| CN106308920B true CN106308920B (en) | 2019-05-28 |
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| CN201510385924.2A Active CN106308920B (en) | 2015-06-30 | 2015-06-30 | A kind of ablation catheter |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110123444A (en) * | 2019-06-03 | 2019-08-16 | 江苏吉瑞达电子有限公司 | Medical belt pressure sensor radio frequency ablation catheter |
| CN112842524A (en) * | 2021-01-27 | 2021-05-28 | 北京航空航天大学 | Intravascular photoacoustic imaging laser ablation catheter |
| CN114343826B (en) * | 2021-12-03 | 2024-05-10 | 杭州德诺电生理医疗科技有限公司 | Ablation catheter |
| CN114470478B (en) * | 2022-03-09 | 2024-04-23 | 上海颖特微络医疗科技有限公司 | Intracavity treatment catheter |
| CN114832201B (en) * | 2022-03-15 | 2023-09-01 | 介入科技发展(深圳)有限公司 | Catheter and system capable of identifying blood vessel direction |
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| CN102078187A (en) * | 2009-11-30 | 2011-06-01 | 韦伯斯特生物官能公司 | Catheter with pressure measuring tip |
| CN102166136A (en) * | 2010-01-22 | 2011-08-31 | 韦伯斯特生物官能公司 | Catheter having a force sensing distal tip |
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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 District, Chengdu, Sichuan 610000 Patentee before: SICHUAN JINJIANG ELECTRONIC SCIENCE AND TECHNOLOGY Co.,Ltd. |