CN213345930U - Radio frequency and chemistry integration ablation end - Google Patents

Abstract

The utility model discloses a radiofrequency and chemical integrated ablation end head, which comprises a hollow cylindrical radiofrequency ablation electrode and a chemical ablation injection head arranged in the radiofrequency ablation electrode; the end part of the radio frequency ablation electrode is provided with a positive connecting hole and a negative connecting hole, the head part is of an arc-shaped structure, and the center of the arc of the head part is provided with an injection hole; the chemical ablation injection head is internally provided with a needle head connected with a chemical pipeline and an expansion body connected with a 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. Through the ablation end that this integration combines, can carry out radiofrequency 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

Radio frequency and chemistry integration ablation end

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a radio frequency and chemical integration melt end.

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 end, solves and lacks the integration among the prior art and melts the end, and radio frequency ablation and chemical ablation can only independently separately go on a difficult problem.

In order to solve the technical problem, the utility model adopts a technical scheme that a radiofrequency and chemical integrated ablation end is provided, which comprises a hollow cylindrical radiofrequency ablation electrode, wherein a cavity for accommodating a chemical ablation injection head is arranged inside the radiofrequency ablation electrode; the end part of the radio frequency ablation electrode is provided with a positive connecting hole and a negative connecting hole for radio frequency ablation, the head part is of an arc-shaped structure, the center of the arc of the head part is provided with an injection hole, and the injection hole is communicated with the cavity; the chemical ablation injection head is internally provided with a needle head connected with a chemical pipeline and an expansion body connected with a 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 cross section of the expansion body is annular, the expansion body is provided with a through hole for the chemical pipeline to pass through, and the chemical pipeline is connected with the needle after passing through the through hole.

Preferably, the expansion body is fixed through a fixing frame, one end of the expansion body, which is far away from the needle head, is fixed on the bottom wall of the fixing frame, and one end of the expansion body, which is close to the needle head, is fixed on the movable plate; the upper side and the lower side of the moving plate are provided with convex blocks, the side wall of the fixing frame is correspondingly provided with sliding grooves, and the convex blocks move in the sliding grooves along the front-back direction.

Preferably, a first through hole and a second through hole are formed in the bottom wall of the fixing frame, and the chemical pipeline penetrates through the first through hole and is connected with the needle head; and the gas pipeline passes through the second through hole and is communicated with the expansion body.

Preferably, a third through hole is formed in the center of the moving plate, the needle head penetrates through the third through hole, and the outer surface of the needle head is fixedly connected with the third through hole.

Preferably, a flow guide hole used for being connected with the medical liquid flow pipe is formed in the radio frequency ablation electrode.

Preferably, a cooling net is arranged in the radiofrequency ablation electrode, the cooling net comprises an input end and an output end which are positioned at the end part of the radiofrequency ablation electrode and respectively connected with two cooling pipes, and cooling liquid passes through the two cooling liquid flow pipes and the cooling pipe network to form a cooling loop.

The utility model has the advantages that: the utility model discloses a radiofrequency and chemical integrated ablation end head, which comprises a hollow cylindrical radiofrequency ablation electrode and a chemical ablation injection head arranged in the radiofrequency ablation electrode; the end part of the radio frequency ablation electrode is provided with a positive connecting hole and a negative connecting hole, the head part is of an arc-shaped structure, and the center of the arc of the head part is provided with an injection hole; the chemical ablation injection head is internally provided with a needle head connected with a chemical pipeline and an expansion body connected with a 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. Through the ablation end that this integration combines, can carry out radiofrequency 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 cross-sectional view of one embodiment of a radio frequency and chemical integrated ablation tip according to the present invention;

fig. 2 is a schematic end view of an embodiment of a radio frequency and chemical integrated ablation tip according to the present invention;

fig. 3 is a schematic view of an embodiment of an rf and chemical integrated ablation tip according to the present invention;

fig. 4 is a schematic view of a moving plate of an embodiment of an rf and chemical integrated ablation tip according to the present invention;

fig. 5 is a schematic cross-sectional view of a head of an embodiment of a radio frequency and chemical integrated ablation tip according to the present invention;

fig. 6 is a schematic view of a transfer conduit according to the present invention;

fig. 7 is a schematic cross-sectional view of a transfer conduit according to the present invention;

fig. 8 is a schematic diagram of a proximal-end interface according to the present invention;

fig. 9 is a schematic diagram of the rf ablation controller according to the present invention;

fig. 10 is a schematic diagram of a chemical ablation controller according to 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 tip comprises a radiofrequency ablation electrode 5 in a hollow cylindrical shape, and a cavity 56 for accommodating the chemical ablation injection head 6 is arranged inside the radiofrequency ablation electrode 5.

With reference to fig. 2, the end of the rf ablation electrode 5 is provided with a positive connection hole 57 and a negative connection hole 58, which are respectively connected to the positive electrode and the negative electrode of the rf ablation injector through cables, so that rf ablation can be achieved.

In fig. 2, the cavity 56 extends from the center of the end of the radiofrequency ablation electrode 5 towards the head of the radiofrequency ablation electrode 5, and is ultimately capable of accommodating the chemical ablation injection head 6. In fig. 1, the head of the rf ablation electrode 5 is a circular arc-shaped structure, an injection hole 55 is formed in the center of the circular 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, the gas pipeline 82 exhausts gas outwards, the volume of the expansion body 62 is reduced, the needle 61 is pulled to be contracted in the radiofrequency ablation electrode 5, and the needle 61 is prevented from being exposed to the outside to scratch the blood vessel in the process that the radiofrequency ablation electrode 5 is moved out of the blood vessel.

Preferably, in conjunction with fig. 3. 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. 4, 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.

Further, as shown in fig. 1, a diversion hole 51 for connecting with a medical fluid flow tube is formed on the radiofrequency ablation electrode 5. The diversion holes 51 are in an inverted L shape in the cross section of the radio frequency ablation electrode 5. The device is used for injecting normal saline or other liquid medicines for diminishing inflammation, sterilizing and resisting virus during radio frequency ablation. Preferably, in fig. 1, the pilot holes 51 have two.

Preferably, in conjunction with fig. 5. Fig. 5 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.

In order to facilitate understanding of the present invention, as shown in fig. 6, the rf ablation electrode 5 is connected to the rf and chemical integrated ablation catheter. The radiofrequency and chemical integrated ablation catheter comprises a transmission catheter 1, wherein a proximal end 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, a distal end of the transmission catheter 1 is used for connecting, and a radiofrequency ablation electrode 5 is arranged at the distal end of the transmission catheter 1.

With reference to fig. 7, fig. 7 is a cross-sectional schematic 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. 1 is provided with a diversion hole 51 and is communicated with the medical liquid flow pipe 12.

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. 1, 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. 8 to 10 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. 8 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. 9, 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. 9, the rf ablation controller 2 correspondingly comprises a medical liquid input body 22, which is inserted into the corresponding medical liquid input port 45, so as to inject the medical liquid into 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 in fig. 8, 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. 10.

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 4 is a common interface, can be respectively connected with the radio frequency ablation controller and the chemical ablation injector, and is further connected with the corresponding input body through the corresponding interface, so that the near-end interface is isolated and independent from the input body, the input body cannot be confused and inserted wrongly, and the near-end interface has a special interface for connecting the special input body, thereby realizing a special function. 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.

Therefore, the utility model discloses a radiofrequency and chemical integrated ablation end head, which comprises a hollow cylindrical radiofrequency ablation electrode and a chemical ablation injection head arranged in the radiofrequency ablation electrode; the end part of the radio frequency ablation electrode is provided with a positive connecting hole and a negative connecting hole, the head part is of an arc-shaped structure, and the center of the arc of the head part is provided with an injection hole; the chemical ablation injection head is internally provided with a needle head connected with a chemical pipeline and an expansion body connected with a 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. Through the ablation end that this integration combines, can carry out radiofrequency 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. An integrated radiofrequency and chemical ablation tip, comprising: the chemical ablation device comprises a hollow cylindrical radio frequency ablation electrode, wherein a cavity for accommodating a chemical ablation injection head is arranged in the radio frequency ablation electrode; the end part of the radio frequency ablation electrode is provided with a positive connecting hole and a negative connecting hole for radio frequency ablation, the head part is of an arc-shaped structure, the center of the arc of the head part is provided with an injection hole, and the injection hole is communicated with the cavity;

the chemical ablation injection head is internally provided with a needle head connected with a chemical pipeline and an expansion body connected with a 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.

2. The rf-and-chemistry integrated ablation tip of claim 1, wherein: the cross section of the expansion body is annular and is provided with a through hole for the chemical pipeline to pass through, and the chemical pipeline is connected with the needle after passing through the through hole.

3. The rf-and-chemistry integrated ablation tip of claim 2, wherein: the expansion body is fixed through a fixing frame, one end of the expansion body, which is far away from the needle head, is fixed on the bottom wall of the fixing frame, and one end of the expansion body, which is close to the needle head, is fixed on the movable plate; the upper side and the lower side of the moving plate are provided with convex blocks, the side wall of the fixing frame is correspondingly provided with sliding grooves, and the convex blocks move in the sliding grooves along the front-back direction.

4. The rf-and-chemistry integrated ablation tip of claim 3, wherein: a first through hole and a second through hole are formed in the bottom wall of the fixing frame, and the chemical pipeline penetrates through the first through hole and is connected with the needle head; and the gas pipeline passes through the second through hole and is communicated with the expansion body.

5. The rf-and-chemistry integrated ablation tip of claim 4, wherein: and a third through hole is formed in the center of the moving plate, the needle head penetrates through the third through hole, and the outer surface of the needle head is fixedly connected with the third through hole.

6. The rf-and-chemistry integrated ablation tip of claim 5, wherein: and the radiofrequency ablation electrode is provided with a flow guide hole for connecting a medical liquid flow pipe.

7. The rf-and-chemistry integrated ablation tip of claim 6, wherein: the radio frequency ablation electrode is internally provided with a cooling net, the cooling net comprises an input end and an output end which are positioned at the end part of the radio frequency ablation electrode and are respectively connected with two cooling pipes, and cooling liquid passes through the two cooling liquid flow pipes and the cooling pipe network to form a cooling loop.

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