CN213345929U - Radio frequency and chemistry integration ablation catheter - Google Patents
Radio frequency and chemistry integration ablation catheter Download PDFInfo
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- CN213345929U CN213345929U CN202021410162.XU CN202021410162U CN213345929U CN 213345929 U CN213345929 U CN 213345929U CN 202021410162 U CN202021410162 U CN 202021410162U CN 213345929 U CN213345929 U CN 213345929U
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Abstract
The utility model discloses a radio frequency and chemical integrated ablation catheter, which comprises a transmission catheter, wherein a near-end interface used for connecting a radio frequency ablation controller or/and a chemical ablation injector is arranged at the near end of the transmission catheter, a far end of the transmission catheter is used for connecting a radio frequency ablation electrode and a chemical ablation injection head, an electric connector used for connecting the radio frequency ablation controller and the radio frequency ablation electrode is arranged in the transmission catheter, and a hollow tube used for connecting the chemical ablation injector and the chemical ablation injection head is also arranged in the transmission catheter; the hollow tube sets up inside transmission pipe, and transmission pipe's skin is the coating, and the hollow tube suit is in the inside of coating, is provided with the isolation layer between coating and hollow tube, and the electric connector setting is in the isolation layer. Through this radio frequency and chemical integration ablation catheter, can carry out the radio frequency ablation and chemical ablation by timesharing, can also carry out treatments such as cooling, disinfection at the ablation in-process, be favorable to the improvement and the promotion of ablation effect, can also reduce cost and treatment risk.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a radio frequency and chemical integration melt pipe.
Background
The radio frequency ablation is an interventional technique of delivering a radio frequency ablation catheter to a specific position through a blood vessel, and releasing radio frequency current to cause coagulation necrosis of local nerves and tissues of the specific position so as to block a conduction bundle or an origin point. Because the radio frequency current has the advantages of small damage range and no harm to organisms, the radio frequency current is widely applied to treating arrhythmia, hypertension, diabetes, cancer tumor and the like.
Under the condition of the prior art, the treatment effect of single radiofrequency ablation is not ideal for some complicated disease focus parts, and further chemical ablation is often needed for treatment. However, under the current conditions, the two ablation treatment processes need to be performed separately, and need to enter the blood vessel of the human body through the catheter respectively, and when the lesion is reached, obviously, the method not only brings treatment pain to the patient, but also can enhance treatment cost and treatment risk. Therefore, there is a need to develop a study that combines radiofrequency ablation with chemical ablation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a radio frequency and chemical integration ablation catheter, solves and lacks the integration among the prior art and melts the catheter, and radio frequency ablation and chemical ablation can only independently separately go on a difficult problem.
In order to solve the technical problem, a technical solution adopted in the present invention is to provide a radiofrequency and chemical integrated ablation catheter, which includes a transmission catheter, wherein a proximal end of the transmission catheter is provided with a proximal end interface for connecting a radiofrequency ablation controller or/and a chemical ablation injector, a distal end of the transmission catheter is used for connecting a radiofrequency ablation electrode and a chemical ablation injector, an electrical connector for connecting the radiofrequency ablation controller and the radiofrequency ablation electrode is arranged in the transmission catheter, and a hollow tube for connecting the chemical ablation injector and the chemical ablation injector is further arranged in the transmission catheter; the hollow pipe is arranged in the transmission conduit, the outer layer of the transmission conduit is a coating layer, the hollow pipe is sleeved in the coating layer, an isolation layer is arranged between the coating layer and the hollow pipe, and the electric connector is arranged in the isolation layer.
Preferably, a medical liquid flow pipe is further arranged in the isolation layer, the medical liquid flow pipe extends to the radiofrequency ablation electrode, and the radiofrequency ablation electrode is provided with a flow guide hole and communicated with the medical liquid flow pipe.
Preferably, still be provided with two piece at least coolant liquid flow tubes in the barrier layer, coolant liquid flow tube extends to the radiofrequency ablation electrode all the time, the inside or the medial surface of radiofrequency ablation electrode is provided with the cooling pipe network, the both ends of cooling pipe network are connected with two coolant liquid flow tubes respectively, and the coolant liquid constitutes cooling circuit through two coolant liquid flow tubes and cooling pipe network.
Preferably, the isolation layer is further provided with a hard elastic metal strip in an arc shape and extends in the axial direction of the transmission conduit.
Preferably, a cavity for accommodating a chemical ablation injection head is arranged inside the radiofrequency ablation electrode, and the head of the radiofrequency ablation electrode is provided with an injection hole which is communicated with the cavity; the chemical ablation injection head is internally provided with a needle head connected with the chemical pipeline and an expansion body connected with the gas pipeline, the needle head is also connected with the expansion body, and the expansion body can push the needle head to extend out of the injection hole after being expanded.
Preferably, the near-end interface comprises two radio-frequency electrode ends which are respectively and electrically connected with two independent connecting cables in the isolation layer; the medical liquid inlet is correspondingly connected with the medical liquid flow pipe in the isolation layer in a sealing way; the cooling liquid inlet and the cooling liquid outlet are respectively and correspondingly hermetically connected with the two cooling liquid flow pipes in the isolation layer; and the chemical injection port and the gas injection port are respectively connected with the chemical pipeline and the gas pipeline in the hollow pipe in a sealing way.
Preferably, the proximal interface is stepped and comprises a first stepped interface and a second stepped interface; the two radio frequency electrode ends, the medical liquid input port, the cooling liquid input port and the cooling liquid output port are all arranged on the first step interface; the chemical injection port and the gas injection port are arranged on the second step interface.
The utility model has the advantages that: the utility model discloses a radio frequency and chemical integrated ablation catheter, which comprises a transmission catheter, wherein a near-end interface used for connecting a radio frequency ablation controller or/and a chemical ablation injector is arranged at the near end of the transmission catheter, a far end of the transmission catheter is used for connecting a radio frequency ablation electrode and a chemical ablation injection head, an electric connector used for connecting the radio frequency ablation controller and the radio frequency ablation electrode is arranged in the transmission catheter, and a hollow tube used for connecting the chemical ablation injector and the chemical ablation injection head is also arranged in the transmission catheter; the hollow tube sets up inside transmission pipe, and transmission pipe's skin is the coating, and the hollow tube suit is in the inside of coating, is provided with the isolation layer between coating and hollow tube, and the electric connector setting is in the isolation layer. Through this radio frequency and chemical integration ablation catheter, can carry out the radio frequency ablation and chemical ablation by timesharing, can also carry out treatments such as cooling, disinfection at the ablation in-process, be favorable to the improvement and the promotion of ablation effect, can also reduce cost and treatment risk.
Drawings
Fig. 1 is a schematic view of a delivery catheter according to an embodiment of the rf and chemical integrated ablation catheter of the present invention;
fig. 2 is a cross-sectional view of a radiofrequency ablation electrode of an embodiment of the radiofrequency and chemical integrated ablation catheter, according to the present invention;
fig. 3 is a cross-sectional schematic view of a delivery catheter according to an embodiment of the rf and chemical integrated ablation catheter of the present invention.
Fig. 4 is a schematic view of a proximal end interface of an embodiment of the rf and chemical integrated ablation catheter according to the present invention;
fig. 5 is a schematic diagram showing the components of a rf ablation controller according to an embodiment of the rf and chemical integrated ablation catheter of the present invention;
fig. 6 is a schematic diagram showing the composition of a chemical ablation controller according to an embodiment of the rf and chemical integrated ablation catheter of the present invention;
FIG. 7 is a schematic cross-sectional view of an expansion body of an embodiment of the integrated RF and chemical ablation catheter according to the present invention;
figure 8 is a schematic view of a moving plate of an embodiment of the rf and chemical integrated ablation catheter according to the present invention;
fig. 9 is a schematic cross-sectional view of a radio frequency ablation electrode of another embodiment of a radio frequency and chemical integrated ablation catheter in accordance with the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the radiofrequency and chemical integrated ablation catheter comprises a transmission catheter 1, a proximal interface 4 for connecting a radiofrequency ablation controller or/and a chemical ablation injector is arranged at the proximal end of the transmission catheter 1, and a radiofrequency ablation electrode 5 and a chemical ablation injector head are connected at the distal end of the transmission catheter 1.
Referring to fig. 2, the rf ablation electrode 5 is in the shape of a hollow cylinder, and a cavity 56 for accommodating the chemical ablation injection head 6 is disposed inside the rf ablation electrode 5. The cavity 56 extends from the center of the end of the radiofrequency ablation electrode 5 to the head of the radiofrequency ablation electrode 5, the head of the radiofrequency ablation electrode 5 is of an arc-shaped structure, an injection hole 55 is formed in the center of the arc, and the injection hole 55 is communicated with the cavity 56.
A chemical ablation injection head 6 is arranged in the cavity 56, a needle 61 for connecting with a chemical pipeline 81 and an expansion body 62 for connecting with a gas pipeline 82 are arranged in the chemical ablation injection head 6, and the needle 61 is also connected with the expansion body 62. When no gas is injected into the expansion body 62 through the gas conduit 82, the expansion body 62 is in a contracted state and does not contact the outer surface of the radiofrequency ablation electrode 5. Thus, the heat generated when the RF ablation electrode 5 performs RF ablation does not affect the expansion body 62. When gas is injected into the expansion body 62 through the gas pipeline 82, the expansion body 62 expands to push the needle 61 forward to extend out of the injection hole 55, and then chemical agent can be injected into the needle 61 through the chemical pipeline 81 for ablation. After chemical ablation, when the gas pipeline 82 is exhausted outwards, the volume of the expansion body 62 is reduced, and the needle 61 is pulled to be contracted in the radio frequency ablation electrode 5.
Referring to fig. 3, fig. 3 is a schematic cross-sectional view of a delivery catheter. An electric connector 7 for connecting the radio frequency ablation controller and the radio frequency ablation electrode is arranged in the transmission catheter 1, and a hollow tube 8 for connecting the chemical ablation injector and the chemical ablation injection head is also arranged in the transmission catheter 1; the hollow pipe 8 is disposed inside the transmission duct 1, and a chemical pipe 81 and a gas pipe 82 are disposed inside the hollow pipe 8.
Further, the outer layer 101 of the transmission conduit 1 is a coating layer, the hollow tube 8 is sleeved inside the coating layer 101, an isolation layer 11 is arranged between the coating layer 101 and the hollow tube 8, and the electric connector 7 is arranged in the isolation layer 11.
Preferably, the electrical connector 7 comprises two separate connection cables, a positive connection cable 71 and a negative connection cable 72. The two connecting cables are respectively connected with the positive pole and the negative pole of the radio frequency ablation electrode 5.
Preferably, a medical liquid flow pipe 12 is further arranged in the isolation layer 11, the medical liquid flow pipe 12 extends to the radiofrequency ablation electrode 5 in fig. 2, and the radiofrequency ablation electrode 5 in fig. 2 is provided with a diversion hole 51 and is communicated with the medical liquid flow pipe 12. The device is used for injecting normal saline or other liquid medicines for diminishing inflammation, sterilizing and resisting virus during radio frequency ablation. In fig. 2, the pilot holes 51 have two.
Preferably, at least two cooling liquid flow pipes 13 are further arranged in the isolation layer 11, the cooling liquid flow pipes 13 extend to the radiofrequency ablation electrode 5, a cooling pipe network 52 is arranged inside or on the inner side surface of the radiofrequency ablation electrode 5 in fig. 2, two ends of the cooling pipe network 52 are respectively connected with the two cooling liquid flow pipes 13, and the cooling liquid passes through the two cooling liquid flow pipes 13 and the cooling pipe network to form a cooling loop to cool the radiofrequency ablation electrode 5.
Preferably, the isolation layer 11 is further provided with a hard elastic metal strip 10 having an arc shape and extending in the axial direction of the transfer duct 1. Thereby, the toughness and rigidity of the entire transfer tube 1 can be improved, and the bending resistance can be enhanced.
Further, fig. 4 to 6 are combined. The proximal interface 4 comprises two rf electrode terminals electrically connected to two independent connection cables in the isolation layer 11, respectively. The two radio frequency electrode ends are respectively arranged in two radio frequency electrode holes, namely a radio frequency positive electrode hole 41 and a radio frequency negative electrode hole 42.
Preferably, the rf positive hole 41 and the rf negative hole 42 in fig. 4 have different cross sections, thereby preventing misinsertion, for example, the rf positive hole 41 has a square cross section and the rf negative hole 42 has a circular cross section. With reference to fig. 5, during rf ablation, the rf ablation control body 21 in the rf ablation controller 2 is electrically connected to the rf electrode posts in the two rf electrode holes, and the rf ablation control body 21 controls the power on/off and the current magnitude during rf ablation.
Preferably, the proximal port 4 further comprises a medical fluid inlet 45, which is in sealing connection with the medical fluid tube 12 in the isolation layer 11. In fig. 5, the rf ablation controller 2 correspondingly comprises a medical fluid input body 22 inserted into the corresponding medical fluid input port 45, so as to inject medical fluid to the rf ablation electrode 5 at the distal end.
Preferably, the proximal port 4 further includes a cooling fluid input port 46 and a cooling fluid output port 47, which are respectively and correspondingly hermetically connected to the two cooling fluid flow pipes 13 in the isolation layer 11. The radiofrequency ablation controller 2 correspondingly comprises a cooling liquid input 23 and a cooling liquid output 24, which are respectively inserted into a corresponding cooling liquid input port 46 and a corresponding cooling liquid output port 47. Therefore, cooling liquid can be continuously injected from the radio frequency ablation controller 2 to the radio frequency ablation electrode 5 at the far end, and the high temperature generated by the radio frequency ablation electrode 5 in the ablation process is reduced.
As can be seen from fig. 4, the proximal interface 4 is stepped, comprising a first step interface 401 and a second step interface 402. The radio frequency positive electrode hole 41, the radio frequency negative electrode hole 42, the medical liquid inlet 45, the cooling liquid inlet 46 and the cooling liquid outlet 47 are all arranged on the first step interface 401, and the first step interface 401 is correspondingly matched and connected with the radio frequency main interface 26 of the radio frequency ablation controller. The second step interface 402 is used to connect with the chemical ablation injector 3 of fig. 6.
Preferably, the proximal port 4 comprises a chemical injection port 43, the chemical injection port 43 is hermetically connected to the hollow tube 8, and specifically, the chemical injection port 43 is hermetically connected to a chemical conduit 81 of the hollow tube 8. The chemical ablation injector 3 correspondingly comprises a chemical injection body 31, which can inject the chemical therapeutic drug into the hollow tube 8 and the chemical ablation injection head 6 at the distal end after being inserted into the chemical injection port 43.
The proximal port 4 further comprises a gas injection port 44, and the chemical ablation injector 3 further comprises a gas injection body 32, which is inserted into the gas injection port 44 to inflate and deflate the gas conduit 82. The chemical general interface 33 of the chemical ablation injector 3 is correspondingly connected with the second step interface 402.
Therefore, the near-end interface is a public interface and can be respectively connected with the radio frequency ablation controller and the chemical ablation injector, the near-end interface is further connected with the corresponding input bodies through the corresponding interfaces, the near-end interface and the chemical ablation injector are isolated and independent from each other, the near-end interface and the chemical ablation injector cannot be mixed up and inserted wrongly, and the near-end interface has a special interface and is connected with the special input bodies, so that the special function is realized. For example, in the case of a chemical ablation injector, the proximal interface has only one chemical injection port connected to the proximal interface in a matching manner, and the chemical injection port is disposed at a different position from the aforementioned cooling liquid input port, cooling liquid output port, medical liquid input port, rf electrode port, and the like, so that they do not affect each other and can be used separately and independently. Therefore, the radiofrequency ablation controller and the chemical ablation injector are used in a time-sharing manner, and the radiofrequency ablation controller is usually connected to perform radiofrequency ablation, the connection between the radiofrequency ablation controller and the near-end interface is released after the radiofrequency ablation controller and the near-end interface are connected, and then the chemical ablation injector and the near-end interface are connected to perform chemical ablation.
Further, fig. 2 and 7 are combined. The cross section of the expansion body 62 is annular, and the expansion body is provided with a through hole 621 through which the chemical pipeline 81 passes, and the chemical pipeline 81 passes through the through hole 621 to be connected with the needle 61. In fig. 1, the expansion body 62 is fixed by a fixing frame 64, the fixing frame 64 comprises a bottom wall and a side wall, one end of the expansion body 62 far away from the needle 61 is fixed on the bottom wall of the fixing frame 64, and one end close to the needle 61 is fixed on the moving plate 63; the moving plate 63 has a protrusion 631 at both upper and lower sides thereof, and the fixing frame 64 has a sliding slot 65 at a sidewall thereof, wherein the protrusion 631 can move in the sliding slot 65 in a front-back direction.
Preferably, a first through hole 641 and a second through hole 642 are formed in the bottom wall of the fixing frame 64, and the chemical conduit 81 passes through the first through hole 641 and connects to the needle 61. The gas pipe 82 communicates with the expansion body 62 through the second through hole 642.
Preferably, referring to fig. 8, a third through hole 643 is formed at the center of the moving plate 63, and the needle 61 passes through the third through hole 643, and the outer surface thereof is fixedly connected to the third through hole 643. The proximal end of the needle 61 is connected to a chemical conduit 81.
Preferably, in conjunction with fig. 9. Fig. 9 is a schematic cross-sectional view of the head of the rf ablation electrode 5. A cooling net 52 is arranged in the radiofrequency ablation electrode 5, the cooling net 52 comprises an input end 53 and an output end 54 which are positioned at the end part of the radiofrequency ablation electrode, the input end 53 and the output end 54 are respectively connected with two cooling pipes, a cooling loop is formed by the two cooling liquid flow pipes and the cooling pipe net 52, and the radiofrequency ablation electrode 5 is cooled by injecting cooling liquid into the cooling liquid flow pipes.
The radiofrequency ablation and the chemical ablation can be respectively and independently performed by the radiofrequency and chemical integrated ablation tip, for example, the radiofrequency ablation is performed first, and then the chemical ablation is performed; or first chemical ablation and then radiofrequency ablation. The two ablation modes can be simultaneously or synchronously carried out according to the treatment requirement, namely, the radiofrequency ablation and the chemical ablation are carried out simultaneously, so that the two modes can be synchronously carried out.
Therefore, the utility model discloses a radio frequency and chemical integrated ablation catheter, which comprises a transmission catheter, wherein a near-end interface used for connecting a radio frequency ablation controller or/and a chemical ablation injector is arranged at the near end of the transmission catheter, a radio frequency ablation electrode and a chemical ablation injection head are connected at the far end of the transmission catheter, an electric connector used for connecting the radio frequency ablation controller and the radio frequency ablation electrode is arranged in the transmission catheter, and a hollow tube used for connecting the chemical ablation injector and the chemical ablation injection head is also arranged in the transmission catheter; the hollow tube sets up inside transmission pipe, and transmission pipe's skin is the coating, and the hollow tube suit is in the inside of coating, is provided with the isolation layer between coating and hollow tube, and the electric connector setting is in the isolation layer. Through this radio frequency and chemical integration ablation catheter, can carry out the radio frequency ablation and chemical ablation by timesharing, can also carry out treatments such as cooling, disinfection at the ablation in-process, be favorable to the improvement and the promotion of ablation effect, can also reduce cost and treatment risk.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.
Claims (7)
1. A radio frequency and chemical integrated ablation catheter is characterized by comprising a transmission catheter, wherein a near end interface used for connecting a radio frequency ablation controller or/and a chemical ablation injector is arranged at the near end of the transmission catheter, a radio frequency ablation electrode and a chemical ablation injection head are connected at the far end of the transmission catheter, an electric connector used for connecting the radio frequency ablation controller and the radio frequency ablation electrode is arranged in the transmission catheter, and a hollow tube used for connecting the chemical ablation injector and the chemical ablation injection head is further arranged; the hollow pipe is arranged in the transmission conduit, the outer layer of the transmission conduit is a coating layer, the hollow pipe is sleeved in the coating layer, an isolation layer is arranged between the coating layer and the hollow pipe, and the electric connector is arranged in the isolation layer.
2. The radiofrequency and chemical integration ablation catheter as claimed in claim 1, wherein a medical fluid flow tube is further disposed in the isolation layer, the medical fluid flow tube extends to the radiofrequency ablation electrode, and the radiofrequency ablation electrode is provided with a diversion hole and is communicated with the medical fluid flow tube.
3. The radio frequency and chemical integrated ablation catheter as claimed in claim 2, wherein at least two cooling liquid flow pipes are further arranged in the isolation layer, the cooling liquid flow pipes extend to the radio frequency ablation electrode, a cooling pipe network is arranged inside or on the inner side surface of the radio frequency ablation electrode, two ends of the cooling pipe network are respectively connected with the two cooling liquid flow pipes, and cooling liquid passes through the two cooling liquid flow pipes and the cooling pipe network to form a cooling loop.
4. The rf-and-chemi-integrated ablation catheter as claimed in claim 3, wherein the isolation layer is further provided with a hard elastic metal strip in an arc shape and extending in an axial direction of the delivery catheter.
5. The radiofrequency and chemical integration ablation catheter as claimed in claim 4, wherein a cavity for accommodating a chemical ablation injection head is arranged inside the radiofrequency ablation electrode, and an injection hole is formed in the head of the radiofrequency ablation electrode and communicated with the cavity; the chemical ablation injection head is internally provided with a needle head connected with the chemical pipeline and an expansion body connected with the gas pipeline, the needle head is also connected with the expansion body, and the expansion body can push the needle head to extend out of the injection hole after being expanded.
6. The rf-chemo integrated ablation catheter according to claim 5, wherein the proximal interface comprises two rf electrode tips electrically connected to two separate connection cables in the isolation layer, respectively; the medical liquid inlet is correspondingly connected with the medical liquid flow pipe in the isolation layer in a sealing way; the cooling liquid inlet and the cooling liquid outlet are respectively and correspondingly hermetically connected with the two cooling liquid flow pipes in the isolation layer; the chemical injection port and the gas injection port are respectively connected with the chemical pipeline and the gas pipeline in the hollow pipe in a sealing way.
7. The rf-chemo integrated ablation catheter according to claim 6, wherein the proximal interface is stepped, comprising a first step interface and a second step interface; the two radio frequency electrode ends, the medical liquid input port, the cooling liquid input port and the cooling liquid output port are all arranged on the first step interface; the chemical injection port and the gas injection port are arranged on the second step interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021410162.XU CN213345929U (en) | 2020-07-16 | 2020-07-16 | Radio frequency and chemistry integration ablation catheter |
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| CN202021410162.XU CN213345929U (en) | 2020-07-16 | 2020-07-16 | Radio frequency and chemistry integration ablation catheter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111772776A (en) * | 2020-07-16 | 2020-10-16 | 嘉兴市第二医院 | Radio frequency and chemical integrated ablation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111772776A (en) * | 2020-07-16 | 2020-10-16 | 嘉兴市第二医院 | Radio frequency and chemical integrated ablation device |
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