CN105615991A - Ablation catheter - Google Patents
Ablation catheter Download PDFInfo
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- CN105615991A CN105615991A CN201410619961.0A CN201410619961A CN105615991A CN 105615991 A CN105615991 A CN 105615991A CN 201410619961 A CN201410619961 A CN 201410619961A CN 105615991 A CN105615991 A CN 105615991A
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- ablating electrode
- ablation catheter
- wire
- catheter
- attachment cap
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Abstract
The invention provides an ablation catheter. The ablation catheter comprises an operation handle, a catheter body and an ablation electrode which are connected from the near to the distant, wherein a far end of the ablation catheter is separately connected with a closure device; the operation handle controls the closure device to be separated from the ablation electrode; after closure device completes closure, the closure device falls off from the ablation electrode, and the ablation electrode is exposed for ablation, so that closure and ablation can be realized in one operation. The processing process of the ablation catheter is simple, the cost is low, the operation is simple and convenient, and the ablation catheter doesn't have more severe influence on the operation mode, the operation time and the like.
Description
Technical field
The present invention relates to technical field of medical instruments, be specifically related to a kind of ablation catheter.
Background technology
Now, the treatment for atrial fibrillation mainly has two ways, and one is recover sinus rhythm, and as adopted catheter ablation technique, another kind is to adopt the mode controlling heart rate in conjunction with pre-preventing thrombosis. The thromboembolism caused by atrial fibrillation, its thrombosis source is mainly derived from left auricle, even if by treating, having recovered sinus rhythm, left auricle shrinks to time and presses down, it is possible to forming thrombosis, causes the risk of cerebral infarction. Therefore, left auricle is blocked, it is possible to be substantially reduced the risk of apoplexy. At present, it is possible to by the mode of intracardiac intervention, left auricle is blocked, the stopper with special construction design is used, utilize guidance technology to set up and enter left auricle path through skin, carried stopper by carrier again, and then be placed in left auricle, left auricle is blocked.
Art formula currently for atrial fibrillation is mainly radio-frequency ablation procedure, recovers sinus rhythm, is carried out the prevention of thrombosis after surgery by preventing thrombosis medicine. Sufferer needs to carry out after surgery lasting administration, adds the financial burden of patient and reduces the quality of life of patient. This is accomplished by designing a kind of apparatus, it is possible to realizing catheter ablation simultaneously and left auricle is blocked, this apparatus also needs to simple to operate, easy to use, and the mode performed the operation and operating time etc. are not produced considerable influence.
Summary of the invention
It is an object of the invention to provide a kind of ablation catheter, it is possible to realize catheter ablation simultaneously and left auricle is blocked, and processing technique is simple, cost is low.
For achieving the above object and other relevant purpose, the present invention provides a kind of ablation catheter: include the operation handle, catheter main body and the ablating electrode that from the close-by examples to those far off connect, the separable stopper that is connected to of far-end at ablating electrode, described operation handle controls described stopper and departs from from described ablating electrode.
Optionally, described stopper includes: end socket, metal net and attachment cap; Described end socket and described attachment cap are respectively used to the two ends of fixing described metal net, form closed shape.
Optionally, described end socket is arranged on the same axis with described attachment cap.
Optionally, described stopper is connected with described ablating electrode far-end by described attachment cap, and described operation handle is connected with described attachment cap, controls described attachment cap and departs from from described ablating electrode.
Optionally, described attachment cap is connected by screw thread with described ablating electrode, described attachment cap is provided with female thread, described ablating electrode is provided with external screw thread.
Optionally, described female thread and external screw thread are rectangle, zigzag, triangle or trapezoidal.
Optionally, the length of described ablating electrode is 3mm��6mm, and described external screw thread length on described ablating electrode is 1mm��4mm.
Optionally, described attachment cap is connected by buckle with described ablating electrode.
Optionally, described buckle is set to I-shaped, spherical or Semen arachidis hypogaeae shape.
Optionally, described operation handle being provided with knob, described knob is a hollow circular cylinder.
Optionally, the near-end of described catheter main body passes in operation handle, and the inner surface of the outer surface of described catheter main body and described knob is mutually bonded, and drives described catheter main body and described ablating electrode to rotate by rotary knob, it is achieved the disengaging of described stopper.
Optionally, also comprising deflectable section, be connected between described ablating electrode and described catheter main body, described deflectable section includes multi-lumen tube.
Optionally, being respectively arranged with the first wire and the second wire in two lumens symmetrical in described multi-lumen tube, the far-end of described first wire and the second wire is all connected with the near-end of described ablating electrode.
Optionally, described first wire and the second wire respectively through catheter main body and extend in described operation handle; Described first wire is fixed in described operation handle the far-end of sliding shoe, and described second wire, through the perforation of described sliding shoe side, is fixed on the near-end of described sliding shoe after skin pulley; Described sliding shoe can slide up and down in sliding tray, thus straining the first wire or the second wire, it is achieved the bilateral bending of ablation catheter.
Compared with prior art, ablation catheter provided by the present invention provides the benefit that:
1, the present invention is by being connected to stopper the far-end of ablating electrode is separable, after stopper implements closure, operation handle controls stopper and departs from from ablating electrode, expose ablating electrode to melt again, such that it is able to realize closure and melt in performing the operation at one simultaneously, and described ablation catheter processing technique is simply, and cost is low, and easy and simple to handle, the mode performed the operation and operating time etc. are not produced large effect;
2, in the present invention, stopper is connected with ablating electrode by screw thread or buckle, operation handle is provided with knob, the inner surface of knob is mutually bonding with the outer surface of catheter main body, while rotary knob, catheter main body and ablating electrode all rotate, stopper is departed from from ablating electrode, and its method is simple, easy to operate.
Accompanying drawing explanation
The structural representation of the ablation catheter that Fig. 1 provides for one embodiment of the invention.
The connection diagram of stopper and ablating electrode in the ablation catheter that Fig. 2 provides for one embodiment of the invention.
The connection diagram of stopper and ablating electrode in the ablation catheter that Fig. 3 a��3b provides for another embodiment of the present invention.
Ablating electrode in the ablation catheter that Fig. 4 provides for one embodiment of the invention, deflectable section and catheter main body profile.
Fig. 5 a and 5b respectively Fig. 4 sectional view at A place Yu B place.
The ablation catheter that Fig. 6 provides for one embodiment of the invention operates the profile of handle.
The use schematic diagram of the ablation catheter that Fig. 7 a��7c provides for one embodiment of the invention.
Detailed description of the invention
For making present disclosure clearly understandable, below in conjunction with Figure of description, present disclosure is described further. Certainly the invention is not limited in this specific embodiment, the general replacement known by those skilled in the art is also covered by protection scope of the present invention.
Secondly, the present invention utilizes schematic diagram to carry out detailed statement, and when describing present example in detail, for the ease of illustrating, schematic diagram, should to this restriction as the present invention not according to general ratio partial enlargement.
The core concept of the present invention is: connect stopper on ablating electrode, and stopper can depart from from ablating electrode, after implementing closure, stopper is come off from ablating electrode, expose ablating electrode to melt again, such that it is able to realize closure and melt in performing the operation at one simultaneously.
Refer to Fig. 1, the structural representation of its ablation catheter provided for one embodiment of the invention. As shown in Figure 1, described ablation catheter includes the operation handle 15, catheter main body 14 and the ablating electrode 12 that from the close-by examples to those far off connect, the separable stopper 11 that is connected to of far-end at described ablating electrode 12, described operation handle 15 controls described stopper 11 and departs from from described ablating electrode 12. Described ablation catheter also includes deflectable section 13, is connected between described ablating electrode 12 and described catheter main body 14.
The Main Function of described stopper 11 is by closure, in the present embodiment, is mainly used in left auricle is blocked. Described stopper 11 includes end socket 111, metal net 112 and attachment cap 113, as shown in Figure 2. Described metal net 112 is formed by memory wire braiding, such as titanium-nickel wire; Can also by being laser-cut into woven mesh; Described metal net 112 is preset to certain shape according to actual needs, for instance dish type. Described end socket 111 and described attachment cap 113 are respectively used to the two ends of fixing described metal net 112 so that mesh grid forms closed shape; Described end socket 111 is in the outside of closed shape, and described attachment cap 113 is in the inner side of closed shape, and namely the near-end of metal net 112 is embedded in attachment cap 113, and described end socket 111 is arranged on the same axis with described attachment cap 113.
The diameter D of described stopper 11 is 5mm��60mm, and the form of tissue carrying out as required blocking is adjusted, for instance be adjusted according to the form of left auricle. Described stopper 11 is connected with described ablating electrode 12 far-end by described attachment cap 113, and described operation handle 15 is connected with described attachment cap 113, controls described attachment cap 113 and departs from from described ablating electrode 12. In the present embodiment, described attachment cap 113 is connected by screw thread with described ablating electrode 12, specifically refer to Fig. 2, arranges female thread on described attachment cap 113, being provided with external screw thread on described ablating electrode 12, external screw thread can pass through the method for screw die, thread rolling machine or lathe Pick Wire and obtain; Described female thread and external screw thread are rectangle, and major diameter of thread is less than 3mm, and pitch is 0.05mm��1mm, groove width=0.5 �� pitch+(0.02-0.04) mm, tooth height=0.5 �� pitch+(0.1-0.2) mm, the facewidth=pitch-groove width, internal diameter=external diameter-2 �� tooth is high; It should be noted that described female thread and externally threaded size are not limited to above-mentioned data, it is possible to determine with the concrete size of ablating electrode 12 and the surgical condition of reality according to described stopper 11; In other embodiments, described female thread and external screw thread can also be zigzag, triangle or the shape such as trapezoidal.
Described ablating electrode 12 is metal material, for instance copper, rustless steel, platinum, gold or platinum alloy etc., and its length is 3mm��6mm, and described external screw thread length on described ablating electrode 12 is 1mm��4mm, for instance 2mm, 3mm, it is preferred that external thread length is 3mm; Do not have on externally threaded surface with multiple apertures at described ablating electrode 12, be connected with the intrusion pipe in catheter main body 14, it is possible in ablation procedure, ablating electrode 12 is irrigated, to reduce the temperature of ablating electrode 12. The length of described attachment cap 113 is 1mm��4mm, for instance 2mm, 3mm, it is preferred that length is 2mm; The diameter of described attachment cap 113, more than the diameter of described ablating electrode 12, is typically in 3mm��5mm; The material of described attachment cap 113 is metal, such as: rustless steel, copper etc., can also be engineering plastics, such as: nylon, ABS (AcrylonitrilebutadieneStyrenecopolymers, acrylonitrile-butadiene-styrene copolymer), POM (Polyoxymethylene, polyformaldehyde), PES (polyethersulfone resin) etc.
In another embodiment of the invention, described attachment cap 113 is connected by buckle with described ablating electrode 12, and described buckle can be I-shaped, spherical or Semen arachidis hypogaeae shape, as shown in Fig. 3 a and 3b. In fig. 3 a, the far-end of described ablating electrode 12 is set to I-shaped, and described attachment cap 113 is set to corresponding hollow structure, and the far-end of described ablating electrode 12 embeds in described attachment cap 113; Fig. 3 b is the connection of another kind of shape, and the far-end of described ablating electrode 12 is set to spherical, is embedded in described attachment cap 113; The far-end of described ablating electrode 12 is it can also be provided that other shapes being easily attached such as Semen arachidis hypogaeae shapes. Under above-mentioned connected mode. The material of described attachment cap 113 is preferably medical grade silicon rubber, and its hardness is at least above 75D.
Refer to Fig. 4 and Fig. 5, ablating electrode in the ablation catheter that Fig. 4 provides for one embodiment of the invention, deflectable section and catheter main body profile, Fig. 5 a and 5b is the Fig. 4 sectional view at A place Yu B place, as shown in Fig. 4 and Fig. 5 a, 5b, being fixed with temperature sensor 121 and position sensor 122 in ablating electrode 12, fixed form can be cementing or welding. The outer wall pipe of deflectable section 13 is macromolecular material, it is preferred that for the polyurethane material with metal net, its interior shape can be single lumen catheter, it is also possible to be multi-lumen tube, is four lumens in the present embodiment; Wherein, the hardness of outer wall pipe is about 55D. Four lumens contain four chambers, place multiple conducting wires 133, including ablating electrode 12, the wire of temperature sensor 121 and position sensor 122 in the first chamber 100; Placing intrusion pipe 134 in the 3rd chamber 300, saline enters ablating electrode 12 by intrusion pipe 134, reduces the temperature of ablating electrode 12 in ablation procedure; Placing the first bracing wire 131 and the second bracing wire 132 in the second chamber 200 and the 4th chamber 400 respectively, described first bracing wire 131 is all connected with the near-end of ablating electrode 12 with the far-end of the second bracing wire 132, and connected mode includes welding, cementing etc. Described second chamber 200 and the 4th chamber 400 are with ablation catheter axisymmetrical, so when ablation catheter deflects, can guarantee that asymmetric deflection occurs at grade. The material of described first bracing wire 131 and the second bracing wire 132 is metal material, such as rustless steel, Nitinol or copper alloy, it is also possible to be macromolecular material, as(polyarylate fiber). Described first bracing wire 131 and the second bracing wire 132 can be sub-threads, it is also possible to be that multiply is entwined. The diameter of bracing wire is about 0.1mm��0.3mm.
Described ablating electrode 12 with described deflectable section 13, and be connected by glue or epoxy resin between described deflectable section 13 and catheter main body 14. In order to realize the deflection of deflectable section 13, the hardness of described catheter main body 14 is higher than deflectable section 13, being preferably about 75D, material is preferably with TPU (Thermoplasticpolyurethanes, the Polyurethane Thermoplastic Elastomer rubber) plastic tube of metal net. So, when tightening up the first bracing wire 131 or the second bracing wire 132, bending point starts near junction, and partially soft deflectable section 13 deflects, and partially hard catheter main body 14 remains unchanged. In described catheter main body 14, the second described chamber 200 and the 4th chamber 400 are adhered on the inner surface of described catheter main body 14 by glue 141.
It is internal that described catheter main body 14 extends to described operation handle 15, it is operated by the knob 151 on handle 15 to control the disengaging of stopper 11 and ablating electrode 12 and to screw, it is operated by the deflection to control deflectable section 13 of the push button 152 on handle 15, refer to Fig. 1 and Fig. 6, the ablation catheter that Fig. 6 provides for one embodiment of the invention operates the profile of handle, described turn-button 151 is the cylinder of a hollow, described catheter main body 14 passes into cylindrical hollow section, the inner surface of the outer surface of catheter main body 14 and described knob 151 is mutually bonded, so while turning knob 151, catheter main body 14 meeting concomitant rotation, and drive ablating electrode 12 to rotate, it is in stationary state owing to now described stopper 11 has completed closure, the rotation of ablating electrode 12 makes stopper 11 and ablating electrode 12 depart from. described wire 133 is divided into two parts at the near-end of the catheter main body 14 extended in described operation handle 15, fix in the both sides near operation handle outer wall, it is provided with sliding tray 155 and the sliding shoe 153 that can slide on described sliding tray 155 therebetween, it is additionally provided with baffle plate 158 in the both sides of described sliding shoe 153, is used for preventing described sliding shoe 153 from moving left and right, described wire 133 is finally secured on buttock line socket 156, and intrusion pipe 134 is by irrigation ports 157 pass-out of operation handle 15 near-end. first bracing wire 131 is fixed on the far-end of sliding shoe 153 after entering operation handle 15 with glue, after the second bracing wire 132 enters operation handle 15, and the perforation on the right side of sliding shoe 153, after skin pulley 154, it is fixed on the near-end of sliding shoe 153 with glue. so, when sliding shoe 153 moves down along described sliding tray 155, pull the first bracing wire 131, generation side is curved, when sliding shoe 153 is along described sliding tray 155 upward sliding, skin pulley 154 drives the second bracing wire 132, tightens up the second bracing wire 132, generation opposite side is curved, it is achieved thereby that the bilateral bending of ablation catheter. the length of sliding tray 155 determines the stroke of the first bracing wire 131 and the second bracing wire 132, it is possible to control curved degree of crook.
The using method of described ablation catheter includes: by controlling operation handle 15 so that stopper 11, ablating electrode 12, deflectable section 13 and catheter main body 14 enter in human body and arrive the tissue needing to carry out blocking; Stopper 11 is used to complete the closure of tissue; Knob 151 on rotating operating handle 15, makes stopper 11 depart from from ablating electrode 13, exposes ablating electrode 11 and implement ablative surgery.
Refer to Fig. 7 a��7c, describe the method using ablation catheter provided by the present invention in detail, as shown in Figure 7a, set up the path of heart 30 left atrium 31 by puncture needle 20 and guide sheath 21, and be positioned over left auricle 32 end; As shown in Figure 7b, ablation catheter enters left atrium 31 by guide sheath 31, and then enters left auricle 32, progressively retreats guide sheath 21, discharges stopper 11, complete the closure of left auricle 32; As shown in Figure 7 c, turning of rotating operation handle is turned round, and makes ablation catheter and stopper 11 depart from, and exposes ablating electrode 12, and ablating electrode 12 can continue to implement ablative surgery.
In sum, the present invention is connected to stopper the far-end of ablating electrode is separable, after stopper implements closure, operation handle controls stopper and departs from from ablating electrode, exposes ablating electrode and melts, such that it is able to realize closure and melt in performing the operation at one simultaneously, and described ablation catheter processing technique is simple, cost is low, and easy and simple to handle, and the mode performed the operation and operating time etc. are not produced large effect; In the present invention, stopper is connected with ablating electrode by screw thread or buckle, operation handle is provided with knob, the inner surface of knob is mutually bonding with the outer surface of catheter main body, while rotary knob, catheter main body and ablating electrode all rotate, stopper is departed from from ablating electrode, and its method is simple, easy to operate.
Foregoing description is only the description to present pre-ferred embodiments, not any restriction to the scope of the invention, any change that the those of ordinary skill in field of the present invention does according to the disclosure above content, modification, belongs to the protection domain of claims.
Claims (14)
1. an ablation catheter, it is characterized in that, including the operation handle, catheter main body and the ablating electrode that from the close-by examples to those far off connect, the separable stopper that is connected to of far-end at ablating electrode, described operation handle controls described stopper and departs from from described ablating electrode.
2. ablation catheter as claimed in claim 1, it is characterised in that described stopper includes: end socket, metal net and attachment cap; Described end socket and described attachment cap are respectively used to the two ends of fixing described metal net, form closed shape.
3. ablation catheter as claimed in claim 2, it is characterised in that described end socket is arranged on the same axis with described attachment cap.
4. ablation catheter as claimed in claim 2, it is characterised in that described stopper is connected with described ablating electrode far-end by described attachment cap, and described operation handle is connected with described attachment cap, controls described attachment cap and departs from from described ablating electrode.
5. ablation catheter as claimed in claim 4, it is characterised in that described attachment cap is connected by screw thread with described ablating electrode, described attachment cap is provided with female thread, described ablating electrode is provided with external screw thread.
6. ablation catheter as claimed in claim 5, it is characterised in that described female thread and external screw thread are rectangle, zigzag, triangle or trapezoidal.
7. ablation catheter as claimed in claim 5, it is characterised in that the length of described ablating electrode is 3mm��6mm, and described external screw thread length on described ablating electrode is 1mm��4mm.
8. ablation catheter as claimed in claim 4, it is characterised in that described attachment cap is connected by buckle with described ablating electrode.
9. ablation catheter as claimed in claim 8, it is characterised in that described buckle is set to I-shaped, spherical or Semen arachidis hypogaeae shape.
10. ablation catheter as claimed in claim 1, it is characterised in that being provided with knob on described operation handle, described knob is a hollow circular cylinder.
11. ablation catheter as claimed in claim 10, it is characterized in that, the near-end of described catheter main body passes in operation handle, the inner surface of the outer surface of described catheter main body and described knob is mutually bonded, described catheter main body and described ablating electrode is driven to rotate by rotary knob, it is achieved the disengaging of described stopper.
12. ablation catheter as claimed in claim 1, it is characterised in that also comprising deflectable section, be connected between described ablating electrode and described catheter main body, described deflectable section includes multi-lumen tube.
13. ablation catheter as claimed in claim 12, it is characterised in that being respectively arranged with the first wire and the second wire in two lumens symmetrical in described multi-lumen tube, the far-end of described first wire and the second wire is all connected with the near-end of described ablating electrode.
14. ablation catheter as claimed in claim 13, it is characterised in that described first wire and the second wire respectively through catheter main body and extend in described operation handle; Described first wire is fixed in described operation handle the far-end of sliding shoe, and described second wire, through the perforation of described sliding shoe side, is fixed on the near-end of described sliding shoe after skin pulley; Described sliding shoe can slide up and down in sliding tray, thus straining the first wire or the second wire, it is achieved the bilateral bending of ablation catheter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410619961.0A CN105615991B (en) | 2014-11-05 | 2014-11-05 | Ablation catheter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410619961.0A CN105615991B (en) | 2014-11-05 | 2014-11-05 | Ablation catheter |
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| CN105615991A true CN105615991A (en) | 2016-06-01 |
| CN105615991B CN105615991B (en) | 2021-04-16 |
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| WO2019166017A1 (en) * | 2018-03-02 | 2019-09-06 | 诺芮医疗器械（上海）有限公司 | Left atrial appendage occlusion and ablation device |
| US10575754B2 (en) | 2015-09-23 | 2020-03-03 | Covidien Lp | Catheter having a sensor and an extended working channel |
| US10773053B2 (en) | 2018-01-24 | 2020-09-15 | Covidien Lp | Methods of manufacturing a catheter having a sensor |
| US10773051B2 (en) | 2018-01-24 | 2020-09-15 | Covidien Lp | Methods of manufacturing a catheter having a sensor |
| WO2022171045A1 (en) * | 2021-02-09 | 2022-08-18 | 杭州德诺电生理医疗科技有限公司 | Left atrial appendage occlusion and ablation system |
| WO2023125268A1 (en) * | 2021-12-31 | 2023-07-06 | 杭州德诺电生理医疗科技有限公司 | Catheter, catheter assembly, and occlusion ablation system |
| WO2023142428A1 (en) * | 2022-01-26 | 2023-08-03 | 上海鑫律通生命科技有限公司 | Splined basket ablation catheter capable of being bent bidirectionally |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10575754B2 (en) | 2015-09-23 | 2020-03-03 | Covidien Lp | Catheter having a sensor and an extended working channel |
| US10939846B2 (en) | 2015-09-23 | 2021-03-09 | Covidien Lp | Elongated catheter having sensor and an extended working channel |
| US11918338B2 (en) | 2015-09-23 | 2024-03-05 | Coviden Lp | Elongated catheter having sensor and an extended working channel |
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| WO2022171045A1 (en) * | 2021-02-09 | 2022-08-18 | 杭州德诺电生理医疗科技有限公司 | Left atrial appendage occlusion and ablation system |
| WO2023125268A1 (en) * | 2021-12-31 | 2023-07-06 | 杭州德诺电生理医疗科技有限公司 | Catheter, catheter assembly, and occlusion ablation system |
| WO2023142428A1 (en) * | 2022-01-26 | 2023-08-03 | 上海鑫律通生命科技有限公司 | Splined basket ablation catheter capable of being bent bidirectionally |
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| Publication number | Publication date |
|---|---|
| CN105615991B (en) | 2021-04-16 |
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