CN106308920A - Ablation catheter - Google Patents
Ablation catheter Download PDFInfo
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- CN106308920A CN106308920A CN201510385924.2A CN201510385924A CN106308920A CN 106308920 A CN106308920 A CN 106308920A CN 201510385924 A CN201510385924 A CN 201510385924A CN 106308920 A CN106308920 A CN 106308920A
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- ablation catheter
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Abstract
The invention relates to the ablation field, and particularly relates to an ablation catheter. The ablation catheter includes a flexible tube; electrodes for ablating tissues are arranged on the tube; an infusion tube is arranged in the tube; the infusion tube communicates with an outer wall of the tube and can infuse liquid from the outer wall of the tube; the ablation catheter further includes a flexible part and a sensor; a tail end of the tube is a single section which is connected to a main body of the tube through the flexible part; the flexible part is configured to deform with the force of a tissue acted on the tail end of the tube; the sensor is arranged between the tail end of the tube and the flexible part; and the sensor can generate corresponding signals according the deformation. The ablation catheter is simple in structure, is low in production cost, is direct and accurate in pressure measurement, and is good in ablation effect.
Description
Technical field
The present invention relates to the field of melting, particularly to a kind of ablation catheter.
Background technology
Arrhythmia is one of common ARR disease in the world, application catheter carries out radio-frequency ablation procedure and is widely used to treat such disease clinically, radio-frequency (RF) energy, confirms only to melt under the conditions of the electrode of distal end of catheter and the contact pressure of cardiac muscular tissue are suitable to can be only achieved preferable therapeutic effect through clinic to melt by conduit to electrode and the position of electrode contact and surrounding myocardium tissue.
When ablation catheter is treated, it is to insert the catheter in heart, and make distal end of catheter contact with wall of the heart, in the process it is generally important that make the contact wall of the heart that the far-end of conduit is good, otherwise, excessive pressure is likely to result in damage worthless to heart tissue, and even heart wall perforation, too small pressure is then unable to reach the therapeutic purposes thoroughly melted.
Existing technology is the pressure that reclines using electromagnetism or optical technology to measure far-end and tissue, and higher and complicated to equipment requirements, manufacturing cost is the most of a relatively high.
The contact force using the sensor of magnetic induction to come sensing tube far-end and organ is added in the catheter as Chinese patent CN103908337AZ mentions, the easily distortion by the interference of external magnetic field in the application of this sensor, and this technology needs to install multiple Magnetic Sensor technology difficulty in the space that catheter distal tip is minimum greatly, thus add manufacturing cost.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of prior art, it is provided that a kind of simple in construction, manufacturing cost are relatively low, pressure measxurement a kind of ablation catheter directly and accurately.
In order to realize foregoing invention purpose, the invention provides techniques below scheme:
A kind of ablation catheter, it is used for ablation tissue inserted into the patient, it includes the body that can bend, the electrode for melting described tissue it is provided with on described body, described tubular body is provided with intrusion pipe, described intrusion pipe connects with tube wall and can be poured out liquid from tube wall, and described ablation catheter also includes compliant member and sensor
The end of described body is single one section of material, it is connected in the main body of body by described compliant member, described compliant member is configured to can put on the power of end of described body with described tissue and deforms, being provided with sensor between the end of described body and compliant member, described sensor can produce corresponding signal according to deformation.
The main body for body of present configuration, compliant member, sensor, the end segment of body set gradually, simple in construction, and manufacturing process hinge structure is simpler, and cost is lower；
The power of the end that tissue puts on described body is directly conducted on a sensor by end simultaneously, the most direct, the size measuring power exactly (is normally set up the numerical value of a power, about the power of x size, measure far-end the most suitable with the pressure that reclines of tissue, therapeutic effect is more preferable), compare other, common by (needing conversion process by a kind of method measurement size of exerting oneself again after compliant member flexural deformation, the pressure that the power usually measured receives less than actual body end, show that a numerical value judges whether up to standard again by a conversion) as structure, the dynamometry mode of the present invention is the most direct, accurately (measure and how much be exactly how many, reduce conversion process, the most accurate), ablation effect is more preferable, structure is simpler simultaneously, cost is lower,
As the preferred version of the present invention, ablation catheter is circulus, and it is evenly distributed with multiple sensor, and described circulus is arranged for receiving and comes from the pressure being perpendicular to circulus.
Preferred version as the present invention, end and the compliant member of described body are connected by sensor, described sensor is configured to be deformed by the pressure of the end coming from described body, i.e. can measure the power of the radial direction that the end of body is subject to, sensor directly as a connector, structure is simpler, and manufacturing cost is lower, and dynamometry effect is more preferable, i.e. ablation effect also can be more preferable.
As the preferred version of the present invention, described compliant member is made for having resilient plastic material, lightweight, low cost.
Preferred version as the present invention, described flexible member material is metal, spiral groove (being used for making compliant member deform with external force change and naturalness can be back to after removing the pressure) it is provided with on compliant member outer wall, metal parts is for described " having resilient plastic cement ", service life is longer, the most more stable.
As the preferred version of the present invention, described compliant member outer wall and sensor outer wall are provided with flexible pipe body, and described flexible pipe body synchronizes deformation with compliant member, makes compliant member and sensor separate with tissue, shields.
Preferred version as the present invention, the end outer wall of described body is provided with end electrodes, or end electrodes constitutes the end of body, inventive sensor is the tissue measured directly pressure to the end of body, so arranging electrode on the end of body, coordinating the pressure that sensor records, when melting electrode, chance is controlling the most accurate, and ablation effect is more preferable.
As the preferred version of the present invention, described end electrodes has several end electrodes fill orifices connected with described intrusion pipe, for irrigating liquid when melting, help radiography or other functions.
nullPreferred version as the present invention，Described end electrodes possesses mapping function，At least one deflection section is comprised on described body，It is provided with, at described deflection section, the electrode possessing mapping function，Electrode in described end electrodes and deflection section is provided simultaneously with mapping function，So coordinate sensor (it is known that whether the end of body is perpendicular to tissue or becomes how many angles，Also has the direction by patch)，In conjunction with the length of own body between deflection section and end electrodes，Also has the position out of the electrode institute mapping in end electrodes and deflection section，Can be in the hope of the particular location of ablation catheter，More preferable must the carrying out of doctor is helped to melt or other operation processs，(do not know what angle the end of ablation catheter becomes with tissue surface compared to existing technology，The case of bending of whole ablation catheter，The full experience by doctor，Easily tissue is caused damage，Therapeutic effect can not get effectively ensureing simultaneously)，Effect is more preferable.
Preferred version as the present invention, described sensor is piezoresistive transducer, several pressure detecting regions it are provided with on ablation catheter, the pressure of the end of described body is come from for detection, strain gauge (i.e. sensor) it is provided with in described pressure detecting region, the different pieces of information measured by the strain gauge of different pressures monitored area, can determine that after being converted by algorithm whether the position of end electrodes (is perpendicular to tissue or becomes how many angles, also has the direction by patch), magnetic induction compared to existing technology, not by external electrical field or magnetic interference, can the lesions position of ablation tissue accurately and effectively.
As the preferred version of the present invention, described body is driven bending by its internal traction steel wire, and tubular body is additionally provided with electrode cable, sensor conductor, and described electrode cable is connected with electrode, and described sensor conductor is connected with sensor.
Compared with prior art, beneficial effects of the present invention:
Simple in construction, manufacturing cost are relatively low, pressure measxurement directly accurately, ablation effect more preferable.
Accompanying drawing illustrates:
Fig. 1 is ablation catheter working state schematic representation of the present invention；
Fig. 2 is ablation catheter structural representation of the present invention；
Fig. 3 is the explosive view of ablation catheter structure of the present invention；
Fig. 4 is the sectional view of ablation catheter of the present invention；
Fig. 5 is inventive sensor structural representation；
Fig. 6 is ablation catheter unbent condition schematic diagram of the present invention；
Fig. 7 is ablation catheter case of bending schematic diagram of the present invention；
Fig. 8 is that ablation catheter of the present invention deflects section operating diagram；
Fig. 9 is sensor concrete dynamometry schematic diagram 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 sectional view；
Figure 12 conduit overall schematic；
Labelling in figure: 1-end electrodes, 2-annular electrode A, 3-annular electrode B, 4-annular electrode C, 5-far-end 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. adapter 21-annular electrode D, 22-annular electrode E, 91-pressure detecting region X, 92-pressure detecting region Y, 93-pressure detecting region Z.
Detailed description of the invention
Below in conjunction with embodiment and detailed description of the invention, the present invention is described in further detail.But this should not being interpreted as, the scope of the above-mentioned theme of the present invention is only limitted to below example, and all technology realized based on present invention belong to the scope of the present invention.
Embodiment
1
Such as Fig. 2, 3, 11, a kind of ablation catheter, it is used for ablation tissue inserted into the patient (such as Fig. 1, dash area is tissue, in figure, ablation catheter reclines), it includes that the body that can bend (is pulled bending by the traction steel wire 10 in body, traction steel wire 10 one end is connected on body, the other end can control to pull artificially, its link position with body determines the curved shape of body), the electrode for melting described tissue it is provided with on described body, described tubular body is provided with intrusion pipe 8, described intrusion pipe 8 connects with tube wall and can be poured out liquid from tube wall, described ablation catheter also includes compliant member 7 and sensor 9；
The end of described body is single one section of material, it is connected in the main body of body by described compliant member 7, the end outer wall of described body is provided with end electrodes 1 or end electrodes 1 constitutes the end of body, several end electrodes 1 fill orifices 11 connected with described intrusion pipe 8 are had in described end electrodes 1, described compliant member 7 is configured to can put on the power of end of described body with described tissue and deforms, it is the discoidal sensor of hollow to be provided with sensor 9(between the end of described body and compliant member 7, two ends coordinate the shape of the contact surface of the contact surface of compliant member 7 and the end of body), described sensor 9 is configured to be deformed by the pressure of the end coming from described body.
End and the compliant member 7 of described body are connected by sensor 9, described sensor 9 is piezoresistive transducer, several pressure detecting regions it are provided with on ablation catheter, the pressure of the end of described body is come from for detection, sensor 9 it is provided with on pressure detecting region, the present embodiment is strain gauge, and described strain gauge is arranged in described pressure detecting region, and described strain gauge can produce corresponding signal according to the deformation of described sensor 9；
nullSuch as Fig. 5，Described pressure monitoring region is divided into pressure monitoring region X91、Pressure monitoring region Y92、Pressure monitoring region Z93，The present embodiment is three，Practical situation can be more，By pressure monitoring region X91、Pressure monitoring region Y92、The force value that pressure monitoring region Z93 detects respectively carries out converting, and to obtain the main body of body described in the opposite proximal end body 5(of end electrodes 1 near a section of body end be far-end body 5，) deformation direction，Such as (Fig. 9)，Measured value pressure detecting region detection value is respectively X、Y、Z，Wherein X > Y > Z，Show the most greatly owing to being stressed on certain direction more to bend toward the direction，On XY region，Selected 1-X/ (X+Y) is the stress point of XY area segments，Through this point with the finger or gesticulate a straight line and pass perpendicularly through XY contact，The most just determine XY region by the line of force,Mode draws YZ and XZ region by the line of force according to this，The trizonal region intersected by the line of force is the stress point of end electrodes，The direction that stress point is relative is bending direction，It it is more than the basic Cleaning Principle of which，As above-mentioned，Can be more pressure detecting region and more accurate calculation when actual measurement and computing.
The main body of described body is far-end body 5 near a section of body free segment, described compliant member 7 is connected on far-end body 5, annular electrode A2, annular electrode B3, annular electrode C4 it has been positioned apart from far-end body 5, these three electrodes also can possess mapping function, the tissue around far-end body 5 can be melted simultaneously, make ablation catheter to melt area bigger.
Described compliant member 7 material is metal, and it is cylindrical member, and compliant member 7 outer wall is provided with spiral groove, makes compliant member 7 can change with the pressure of body end and deform.
Described compliant member 7 outer wall and sensor 9 outer wall are provided with flexible pipe body 6, and described flexible pipe body 6 synchronizes deformation with compliant member 7, and flexible pipe body 6 material is PVC or other relatively soft material.
nullIn the present embodiment，Described end electrodes 1 possesses mapping function，At least one deflection section is comprised (such as Fig. 6 when not bending on described body，Deflection section is there is after bending，Such as Fig. 7)，It is provided with, at described deflection section, the electrode possessing mapping function，The present embodiment deflection section is two，And in deflection section, it is provided with the annular electrode D21 of correspondence、The electrode possessing mapping function that annular electrode E22(is the most described)，When needing to improve the degree of accuracy to the monitoring melting catheter position，More deflection sections can be defined according to practical situation，The annular electrode possessing mapping function of correspondence is set in deflection section simultaneously，Such as Fig. 8，Described end electrodes 1 and annular electrode D21、Annular electrode E22 is provided simultaneously with mapping function，So coordinate sensor 9(it is known that whether the end of body is perpendicular to tissue or becomes how many angles，Also has the direction by patch)，In conjunction with the length of own body between deflection section and end electrodes 1，Also have end electrodes 1 and annular electrode D21、Annular electrode E22 institute mapping position out，Can be in the hope of the particular location of ablation catheter，More preferable must the carrying out of doctor is helped to melt or other operation processs.
Such as Fig. 4, described tubular body is additionally provided with electrode cable 13, sensor conductor 12, and described electrode cable 13 is connected with electrode, and to electrode energy supply or transmission data, described sensor conductor 12 is connected with sensor 9, to sensor 9 energy supply or transmission data.
Such as Figure 10, specific works process is:
Described end electrodes 1 reclines tissue, the contact force to end electrodes 1 is organized to make sensor 9 deformation produce pressure, sensors X, Y, Z in pressure monitoring region X91, pressure monitoring region Y92, the pressure monitoring region i.e. figure of Z93() detection obtain signal of telecommunication numerical value, conduit bending is detected in conjunction with annular electrode D21 and annular electrode E22 and end electrodes 1, data above transmission is carried out computing to equipment, gross pressure numerical values recited and end electrodes 1 direction is determined by ring segment, adjust to the condition that melts can be carried out, melt.
Such as Figure 12, single unit system schematic diagram after installing for the application ablation catheter and the miscellaneous part that coordinates with it, the present embodiment ablation catheter is connected on main pipe 15, and main pipe is connected on handle 16, female Luer 17 connects intrusion pipe 8, for carrying the passage of perfusion liquid.Adapter 18 is for being attached with equipment.
Claims (10)
1. an ablation catheter, it is used for ablation tissue inserted into the patient, it includes the body that can bend, the electrode for melting described tissue it is provided with on described body, described tubular body is provided with intrusion pipe, and described intrusion pipe connects with tube wall and can be poured out liquid from tube wall, it is characterised in that, described ablation catheter also includes compliant member and sensor
The end of described body is single one section of material, it is connected in the main body of body by described compliant member, described compliant member is configured to can put on the power of end of described body with described tissue and deforms, being provided with sensor between the end of described body and compliant member, described sensor can produce corresponding signal according to deformation.
A kind of ablation catheter the most according to claim 1, it is characterised in that for circulus, it being evenly distributed with multiple sensor, described circulus is arranged for receiving and comes from the pressure being perpendicular to circulus.
A kind of ablation catheter the most according to claim 1, it is characterised in that arrange sensor in the middle of the end of described body and compliant member, described sensor is configured to be deformed by the longitudinal pressure coming from described body end.
A kind of ablation catheter the most according to claim 1, it is characterised in that described flexible member material is metal, and compliant member outer wall is provided with spiral groove.
A kind of ablation catheter the most according to claim 1, it is characterised in that described compliant member outer wall and sensor outer wall are provided with flexible pipe body, and described flexible pipe body synchronizes deformation with compliant member.
A kind of ablation catheter the most according to claim 1, it is characterised in that be provided with the temperature sensor being used for monitoring end electrodes surface temperature in real time in end electrodes.
A kind of ablation catheter the most according to claim 6, it is characterised in that have several end electrodes fill orifices connected with described intrusion pipe in described end electrodes.
A kind of ablation catheter the most according to claim 6, it is characterised in that described end electrodes possesses mapping function, described body comprises at least one deflection section, is provided with, at described deflection section, the electrode possessing mapping function.
A kind of ablation catheter the most according to claim 6, it is characterised in that be provided with several pressure detecting regions, come from the pressure of the end of described body for detection, be provided with one or more sensor in described pressure detecting region.
A kind of ablation catheter the most according to claim 1, it is characterized in that, described body is driven bending by its internal traction steel wire, and tubular body is additionally provided with electrode cable, sensor conductor, described electrode cable is connected with electrode, and described sensor conductor is connected 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 |
Applications Claiming Priority (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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| CN106308920A true CN106308920A (en) | 2017-01-11 |
| CN106308920B 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN114343826A (en) * | 2021-12-03 | 2022-04-15 | 杭州德诺电生理医疗科技有限公司 | Ablation catheter |
| CN114470478A (en) * | 2022-03-09 | 2022-05-13 | 上海颖特微络医疗科技有限公司 | Intracavity treatment 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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