CN214805317U - Flexible radio frequency ablation catheter - Google Patents
Flexible radio frequency ablation catheter Download PDFInfo
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- CN214805317U CN214805317U CN202120189938.8U CN202120189938U CN214805317U CN 214805317 U CN214805317 U CN 214805317U CN 202120189938 U CN202120189938 U CN 202120189938U CN 214805317 U CN214805317 U CN 214805317U
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- 238000007674 radiofrequency ablation Methods 0.000 title claims abstract description 44
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- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- 238000002679 ablation Methods 0.000 claims description 14
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- 239000004033 plastic Substances 0.000 claims description 8
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- 239000000463 material Substances 0.000 claims description 2
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- 206010046996 Varicose vein Diseases 0.000 description 18
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Abstract
The utility model discloses a flexible radio frequency ablation catheter, wherein an insulating catheter is sleeved on a conductive capillary tube to form an annular pipeline; the conductive capillary tube penetrates through the open end of the conductive circular tube and extends into the closed end of the conductive circular tube, and the open end of the conductive circular tube is communicated with the insulating conduit; the refrigerant medium flows into the conductive circular tube through the conductive capillary tube and flows back through the annular pipeline; the water inlet cavity is communicated with the conductive capillary tube and is used for inputting a refrigerant medium into the conductive capillary tube; the water return cavity is communicated with the insulating guide pipe and outputs refrigerant medium which flows back from the annular pipeline; the radio frequency head is connected with the conductive capillary tube and sends current energy to the conductive capillary tube; the circulating flow of the refrigerant medium takes away the over-concentrated heat of the working end, namely the surface of the conductive circular tube and the nearby tissues, so that the blood in the wall of the diseased vein cavity or the vein cavity is not adhered to the surface of the working end, the surface carbonization of the working end is avoided, and the operation time is shortened.
Description
Technical Field
The utility model relates to the field of medical equipment, especially relate to a flexible radiofrequency ablation catheter.
Background
Varicosity radio frequency ablation is characterized in that under the guidance of ultrasonic waves, a varicosity radio frequency ablation catheter is guided into a lesion venous cavity through a skin puncture (about 2 millimeters), radio frequency current energy is transmitted into a vein wall by the catheter, and charged particles of vein wall tissues generate heat energy through oscillation and friction, so that vein wall proteins are denatured, contracted and occluded. After the diseased vein is occluded, the blood changes its path and flows back to the heart through other healthy venous channels.
At present, clinically applied varicose vein radio frequency ablation catheters are more typical of bipolar varicose vein ablation catheters represented by olympus corporation and self-heating varicose vein ablation catheters represented by medtronic corporation.
The bipolar varicose vein radiofrequency ablation catheter represented by olympus company is shown in fig. 5, and comprises a radiofrequency head 101, an insulating connecting block 201, a neutral electrode tip 301 and a flexible plastic catheter 401. The radio frequency head 101 and the neutral electrode head 301 inject radio frequency current energy into the vein directly, so that polar molecules and ions in vein tissue move at high speed and vibrate at the same speed as the radio frequency current frequency to generate friction heat, and the friction heat is conducted to adjacent tissue, so that the temperature inside the vein tissue is raised, water inside and outside cells is evaporated, dried and shrunk, and when the temperature reaches about 60 ℃, the vein can be necrotized aseptically, and the treatment purpose is achieved. Because the inside of the working end of the catheter is not provided with a cooling device, in the working process, after blood in the blood vessel is heated, the blood is quickly adhered and carbonized at the working end of the front end of the catheter, the radiofrequency current energy cannot be injected continuously after carbonization and scabbing, the bipolar varicose vein ablation catheter needs to be taken out and cleaned and then penetrates into the blood vessel again for ablation, the operation time is long, and the blood vessel is not closed continuously.
The structure of a self-heating varicose vein radio frequency ablation catheter represented by mednley is shown in fig. 6, and the self-heating varicose vein ablation catheter comprises anti-sticking plastic 102, a heating wire 202 and a flexible plastic tube 302. It generates heat through the heater 202 of pipe work end, one deck high temperature resistant antiseized plastics 102 has been added to the heater 202 outside, the heat that produces through the heater 202, the transmission is for antiseized plastics 102, the antiseized plastic layer of rethread is transmitted to the vein blood vessel, radio frequency energy does not directly pour into the vein blood vessel into, the intravascular wall self can not vibrate and produce the heat, rely on heat conduction alone to make the inside intensification of vein pipe wall tissue, when heat conduction to vein pipe wall tissue and make its temperature reach about 60 ℃, maintain a certain time again, just can make vein pipe wall tissue cell aseptic necrosis, vein wall protein degeneration, shrink and be occluded, in order to reach the treatment purpose. Although the problem of adhesion is solved, the heat conduction efficiency is low, and energy cannot be directly conducted or injected into the vein, so that the vaporization of the tissue is not obvious when the tissue is observed under ultrasound, and the treatment effect is not exact.
Therefore, clinically, a varicose vein radiofrequency ablation catheter which can solve the problem of adhesion, ensure the exact treatment effect and confirm the treatment effect in time through imaging equipment such as ultrasound and the like is needed so as to better meet the clinical needs.
The traditional treatment method for the lung nodules and the lung tumors is surgical operation treatment, and has large trauma to patients and large surgical risks. At present, the lung tumor is rapidly developed in China by percutaneous radio frequency ablation treatment under CT guidance, but still many patients can not carry out percutaneous ablation treatment under CT guidance because the lesion is too small or the part is special like central lung cancer. The radio frequency ablation of the pulmonary nodules under the bronchoscope utilizes a channel provided by the bronchoscope, and a radio frequency ablation catheter enters the pulmonary tumor part through the bronchoscope channel to realize the radio frequency ablation treatment of the pulmonary nodules or the pulmonary tumors through the bronchoscope intervention. The bronchoscope enters each bronchus of the lung through the natural respiration channel of the human body without wound. The radio frequency ablation treatment of the small lung nodules or lung tumors is carried out through the intervention of the bronchoscope, and the radio frequency ablation catheter enters the tumor parts of the lungs through the bronchoscope channel, so that the additional trauma brought to a patient by percutaneous puncture can be avoided. At present, the existing bronchus radio-frequency ablation catheter does not have a cold circulation device, focus tissues are easy to adhere to the working end of the radio-frequency ablation catheter and carbonized, extra treatment time is needed, the treatment effect and the treatment continuity are influenced, and the ablation operation time is long. Meanwhile, the existing bronchus radio-frequency ablation catheter is generally hard in hardness, and the toughness of the catheter cannot meet the clinical requirements of ablation.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide a flexible radiofrequency ablation catheter, which ensures the stable injection of energy.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a flexible radio frequency ablation catheter comprising:
a conductive capillary;
the insulating conduit is sleeved on the conductive capillary tube, and an annular pipeline is formed between the insulating conduit and the conductive capillary tube;
one end of the conductive circular tube is closed and is a closed end, and the other end of the conductive circular tube is open and is an open end; the conductive capillary tube penetrates through the open end of the conductive circular tube and extends into the closed end of the conductive circular tube, and the open end of the conductive circular tube is communicated with the insulating conduit; the refrigerant medium flows into the conductive circular tube through the conductive capillary tube and flows back through the annular pipeline;
the water inlet cavity is communicated with the conductive capillary tube and is used for inputting a refrigerant medium to the conductive capillary tube;
the water return cavity is communicated with the insulating conduit and is used for outputting the refrigerant medium which flows back from the annular pipeline;
and the radio frequency head is connected with the conductive capillary tube and is used for sending current energy to the conductive capillary tube.
Optionally, the flexible radiofrequency ablation catheter further comprises an inlet tube; one end of the water inlet pipe is communicated with the water inlet cavity, and the other end of the water inlet pipe is communicated with the cold medium source.
Optionally, the flexible radiofrequency ablation catheter further comprises a water outlet pipe; one end of the water outlet pipe is communicated with the water return cavity, and the other end of the water outlet pipe is communicated with the cold medium recycling device.
Optionally, the closed end of the conductive circular tube is hemispherical, and the open end of the conductive circular tube is a bell mouth.
Optionally, a filling layer is arranged in a gap overlapped between the insulating conduit and the conductive circular tube.
Optionally, the flexible radiofrequency ablation catheter further comprises a positioning core; the positioning core is arranged in the insulating conduit.
Optionally, the flexible radiofrequency ablation catheter further comprises a heat shrink tube; the heat shrinkable tube wraps the overlapped part between the insulating guide tube and the conductive circular tube.
Optionally, the flexible radiofrequency ablation catheter further comprises a handle; the handle coats the water inlet cavity and the water return cavity.
Optionally, an insulating block is disposed on the conductive circular tube.
Optionally, the insulating conduit is made of a flexible polymer plastic material.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the flexible radio frequency ablation catheter of the utility model is characterized in that the insulating catheter is sleeved on the conductive capillary tube, and an annular pipeline is formed between the insulating catheter and the conductive capillary tube; the flexible radio frequency ablation catheter of the utility model also comprises a conductive circular tube, wherein the conductive circular tube comprises a closed end and an open end; the conductive capillary tube penetrates through the open end of the conductive circular tube and extends into the closed end of the conductive circular tube, and the open end of the conductive circular tube is communicated with the insulating conduit; the refrigerant medium flows into the conductive circular tube through the conductive capillary tube and flows back through the annular pipeline; the conductive capillary is communicated with a water inlet cavity, and a refrigerant medium is input into the conductive capillary by the water inlet cavity; the insulating conduit is communicated with a water return cavity, and the water return cavity outputs a refrigerant medium which flows back from the annular pipeline; the conductive capillary is also connected with a radio frequency head, the radio frequency head sends current energy to the conductive capillary, and the conductive capillary conducts the current energy to the conductive circular tube through a coolant medium; the conductive circular tube conducts current energy to the varicose vein, and meanwhile, a refrigerant medium circulates in the conductive capillary and the insulating catheter to cool the conductive circular tube, so that the problems of adhesion and carbonization of lesion tissues or blood in a vein cavity in the energy continuous injection process are effectively solved, and the stability of energy input is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the flexible rf ablation catheter of the present invention;
fig. 2 is a schematic front end view of the flexible rf ablation catheter of the present invention;
fig. 3 is a schematic external view of the flexible rf ablation catheter of the present invention;
fig. 4 is a schematic view of a certain instantaneous current flow direction of the conductive circular tube of the flexible radiofrequency ablation catheter of the present invention;
FIG. 5 is a bipolar varicose vein ablation catheter;
FIG. 6 is a self-heating varicose vein ablation catheter;
fig. 7 is a schematic structural view of a neutral electrode sheet.
Description of the symbols:
1-conductive capillary, 2-insulating conduit, 3-conductive circular tube, 4-water inlet cavity, 5-water return cavity, 6-radio frequency head, 7-water inlet pipe, 8-water outlet pipe, 9-handle, 10-refrigerant medium, 11-neutral electrode slice, 12-neutral electrode connecting wire, 30-filling sealing structure, 31-hot melting forming sealing structure, 32-positioning core, 33-heat shrink tube, 34-insulating block, 35-blood in blood vessel, 36-blood vessel wall, 60-wire, 61-radio frequency wire, 62-first welding spot, 63-second welding spot, 101-radio frequency head, 201-insulating connecting block, 301-neutral electrode tip, 401-flexible plastic conduit, 102-anti-sticking plastic, 202-heating wire, 302-flexible plastic pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The flexible radio frequency ablation catheter of the utility model is characterized in that the insulating catheter is sleeved on the conductive capillary tube, and an annular pipeline is formed between the insulating catheter and the conductive capillary tube; the conductive capillary tube penetrates through the open end of the conductive circular tube and extends into the closed end of the conductive circular tube, and the open end of the conductive circular tube is communicated with the insulating conduit; the refrigerant medium flows into the conductive circular tube through the conductive capillary tube and flows back through the annular pipeline; the conductive capillary is also connected with a radio frequency head, the radio frequency head sends current energy to the conductive capillary, and the conductive capillary conducts the current energy to the conductive circular tube through a coolant medium; the conductive capillary is communicated with a water inlet cavity, and a refrigerant medium is input into the conductive capillary by the water inlet cavity; the insulating conduit is communicated with a water return cavity, and the water return cavity outputs a refrigerant medium which flows back from the annular pipeline; the refrigerant medium circularly flows in the conductive capillary and the insulating catheter to continuously cool the conductive circular tube, so that the problems of adhesion and carbonization of blood of focus tissues or vein lumens in the energy continuous injection process are effectively solved, the stability of energy input is ensured, and the operation time can be shortened.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in figure 1, the flexible radiofrequency ablation catheter of the utility model comprises a conductive capillary tube 1, an insulating catheter 2, a conductive circular tube 3, a water inlet cavity 4, a water return cavity 5 and a radiofrequency head 6. The insulating conduit 2 is sleeved on the conductive capillary 1, and an annular pipeline is formed between the insulating conduit 2 and the conductive capillary 1; one end of the conductive circular tube 3 is closed and is a closed end, and the other end of the conductive circular tube 3 is open and is an open end; the conductive capillary 1 penetrates through the open end of the conductive circular tube 3 and extends into the closed end of the conductive circular tube 3, and the open end of the conductive circular tube 3 is communicated with the insulating conduit 2; the refrigerant medium 10 flows into the conductive circular tube 3 through the conductive capillary 1 and flows back through the annular pipeline; the water inlet cavity 4 is communicated with the conductive capillary 1, and the water inlet cavity 4 is used for inputting a refrigerant medium into the conductive capillary 1; the water return cavity 5 is communicated with the insulating conduit 2, and the water return cavity 5 is used for outputting a cold medium 10 which flows back from the annular pipeline; the radio frequency head 6 is connected with the conductive capillary 1, and the radio frequency head 6 is used for sending current energy to the conductive capillary 1.
In the embodiment of the present invention, the conductive capillary 1 is hollow and made of metal; in addition, the conductive capillary 1 has good toughness, can replace an external guide wire, and can enter a blood vessel with large bending amplitude under the condition of not needing the external guide wire. The insulating conduit 2 is made of flexible high polymer plastic, and the insulating conduit 2 is hollow.
In the embodiment of the present invention, the rf head 6 is connected to an external rf host or an rf energy generation controller; the radio frequency head 6 is connected with the conductive capillary 1 through a lead 60 and a radio frequency wire 61; the radio frequency wire 61 is connected to the wire 60 by a first bond 62 and the wire 60 is connected to the conductive capillary 1 by a second bond 63.
Furthermore, the flexible radiofrequency ablation catheter of the utility model also comprises a water inlet pipe 7; one end of the water inlet pipe 7 is communicated with the water inlet cavity 4, and the other end of the water inlet pipe 7 is communicated with a cold medium source.
The flexible radio frequency ablation catheter of the utility model also comprises a water outlet pipe 8; and one end of the water outlet pipe 8 is communicated with the water return cavity 5, and the other end of the water outlet pipe 8 is communicated with the cold medium recycling device.
In the embodiment of the utility model, the water inlet pipe 7 is communicated with the water inlet cavity 4 through a water inlet arranged on the water inlet cavity 4; the water outlet pipe 8 is communicated with the water return cavity 5 through a water outlet arranged on the water return cavity 5. Furthermore, the cold medium source and the cold medium recovery device are integrated into a whole, such as a liquid bottle. In order to make the refrigerant medium smoothly circulate, a circulating pump is arranged between the liquid bottle and the water inlet pipe to provide power for the circulation of the refrigerant medium.
Further, the refrigerant medium 10 is normal saline water; saline is electrically conductive and can simply and effectively transmit radio frequency current energy.
Preferably, the closed end of the conductive circular tube 3 is hemispherical, and the open end of the conductive circular tube 3 is a bell mouth; further, an insulating block 34 is arranged on the conductive circular tube 3, the insulating block 34 is a spherical insulating block, and the spherical insulating block is arranged at the closed end of the conductive circular tube. In the embodiment of the present invention, the conductive circular tube 3 is made of metal.
Preferably, the flexible radiofrequency ablation catheter of the present invention further comprises a positioning core 32; the positioning core 32 is disposed inside the insulated conducting tube 2. And a filling layer is arranged in a gap overlapped between the insulating conduit 2 and the conductive circular tube 3.
As shown in fig. 2, in the embodiment of the present invention, the filling layer includes a filling sealing structure 30 and a hot-melting forming sealing structure 31, and the positioning core 32 is disposed in the hot-melting forming sealing structure 31.
Preferably, the flexible radiofrequency ablation catheter of the present invention further comprises a heat shrink tube 33; the heat shrinkable tube 33 wraps the overlapped part between the insulating guide tube 2 and the conductive round tube 3.
Furthermore, the embodiment of the utility model also comprises a handle 9; the handle 9 covers the water inlet cavity 4 and the water return cavity 5.
Fig. 3 is a schematic view of the flexible rf ablation catheter in an embodiment, wherein the cooling cycle is as follows:
the refrigerant medium 10 flows from a refrigerant medium source (such as a liquid bottle) and a circulating pump, through a water inlet pipe 7, enters the water inlet cavity 4 from a water inlet, enters the conductive circular pipe 3 through the conductive capillary tube 1, enters the insulating conduit 2, then enters the water return cavity 5, passes through a water outlet, and finally flows back to the refrigerant medium recovery device through a water outlet pipe 8. The circulation work realizes that the refrigerant medium circularly flows in the flexible radio frequency ablation catheter, takes away the heat concentrated by the tissues near the working end of the radio frequency ablation catheter, reduces the temperature of the tissues near the surface of the working end of the catheter, and realizes the functions of no adhesion and no carbonization of the blood in the focus tissues or varicose veins on the surface of the working end of the catheter.
During the cold cycle, accompanied by the radiofrequency energy transfer process:
after the energy output device is started, energy is transmitted to the conductive capillary tube 1 through the radio frequency head 6, the radio frequency wire 61 and the lead 62, and because a small gap is formed between the conductive capillary tube 1 and the conductive circular tube 3, flowing physiological saline is filled in the gap and is conductive, the radio frequency current energy is transmitted to the conductive circular tube 3 through the physiological saline at the front end of the conductive capillary tube 1; the conductive circular tube 3 conducts the radio frequency current energy to the varicose vein, the varicose vein is heated and contracted, after the vaporization of the inside of the tissue is seen under the ultrasonic observation, the handle 9 pulls the insulating catheter 2 to move towards the outer end of the varicose vein, and the continuous closing of the varicose vein is realized, so that the stable injection of the energy can be ensured when the energy is injected.
The utility model discloses in the flexible radio frequency ablation catheter, cold medium matter 10 circulation flow realizes the continuous cooling of conducting circular tube 3 promptly to the work end, takes away the too concentrated heat of work end surface and near tissue, reduces the temperature on work end surface, can make the blood of pathological change vein chamber wall or vein intracavity, non-stick in work end surface to avoid at work end surface carbomorphism. The operation time can be shortened because the problems of adhesion and charring are not required to be treated. When the energy is directly injected into the vein, the vaporization inside the tissue is obvious and the curative effect is reliable when the observation is carried out under the ultrasound.
Furthermore, as shown in fig. 4, the closed end of the metal conductive circular tube is provided with the spherical insulating block, so that the high-frequency current cannot be directly transmitted to the blood 35 in the blood vessel through the closed end at the front end of the metal conductive circular tube, and the blood is equivalent to a conductor, so that the spherical insulating block reduces the loss that the current energy is directly transmitted to the blood through the closed end at the front end of the metal conductive circular tube and then returns to the neutral electrode plate through the blood. As shown in fig. 7, the neutral electrode pad 11 is adhered to the hip of the human body at the distal end, and all the current in the blood is required to flow back to the rf energy generator through the neutral electrode pad 11 and the neutral electrode connecting wire 12 connected to the neutral electrode pad 11. At a certain moment, the high-frequency current on the metal conductive circular tube is concentrated and diffused to the periphery of the metal conductive circular tube, when the closed end of the metal conductive circular tube is provided with the spherical insulating block, more current energy is transmitted to the vascular wall 36 and is concentrated, and the venous vascular wall on the periphery of the metal conductive circular tube can be closed quickly under the concentrated high-frequency energy.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the present disclosure should not be construed as limiting the present invention.
Claims (10)
1. A flexible radio frequency ablation catheter, comprising:
a conductive capillary;
the insulating conduit is sleeved on the conductive capillary tube, and an annular pipeline is formed between the insulating conduit and the conductive capillary tube;
one end of the conductive circular tube is closed and is a closed end, and the other end of the conductive circular tube is open and is an open end; the conductive capillary tube penetrates through the open end of the conductive circular tube and extends into the closed end of the conductive circular tube, and the open end of the conductive circular tube is communicated with the insulating conduit; the refrigerant medium flows into the conductive circular tube through the conductive capillary tube and flows back through the annular pipeline;
the water inlet cavity is communicated with the conductive capillary tube and is used for inputting a refrigerant medium to the conductive capillary tube;
the water return cavity is communicated with the insulating conduit and is used for outputting the refrigerant medium which flows back from the annular pipeline;
and the radio frequency head is connected with the conductive capillary tube and is used for sending current energy to the conductive capillary tube.
2. The flexible radio frequency ablation catheter according to claim 1, further comprising an inlet tube; one end of the water inlet pipe is communicated with the water inlet cavity, and the other end of the water inlet pipe is communicated with the cold medium source.
3. The flexible radio frequency ablation catheter according to claim 1, further comprising an outlet tube; one end of the water outlet pipe is communicated with the water return cavity, and the other end of the water outlet pipe is communicated with the cold medium recycling device.
4. The flexible radiofrequency ablation catheter of claim 1, wherein the closed end of the conductive circular tube is hemispherical and the open end of the conductive circular tube is flared.
5. The flexible radiofrequency ablation catheter of claim 1, wherein a filler layer is disposed in the overlapping space between the insulating catheter and the conductive circular tube.
6. The flexible radiofrequency ablation catheter of claim 1, further comprising a positioning core; the positioning core is arranged in the insulating conduit.
7. The flexible rf ablation catheter of claim 1, further comprising a heat shrink tube; the heat shrinkable tube wraps the overlapped part between the insulating guide tube and the conductive circular tube.
8. The flexible radiofrequency ablation catheter of claim 1, further comprising a handle; the handle coats the water inlet cavity and the water return cavity.
9. The flexible radiofrequency ablation catheter of claim 1, wherein the conductive circular tube has an insulating block disposed thereon.
10. The flexible radiofrequency ablation catheter of claim 1, wherein the insulating catheter is a flexible polymeric plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120189938.8U CN214805317U (en) | 2021-01-22 | 2021-01-22 | Flexible radio frequency ablation catheter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120189938.8U CN214805317U (en) | 2021-01-22 | 2021-01-22 | Flexible radio frequency ablation catheter |
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| Publication Number | Publication Date |
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| CN214805317U true CN214805317U (en) | 2021-11-23 |
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| CN202120189938.8U Withdrawn - After Issue CN214805317U (en) | 2021-01-22 | 2021-01-22 | Flexible radio frequency ablation catheter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112773499A (en) * | 2021-01-22 | 2021-05-11 | 绵阳立德电子股份有限公司 | Flexible radio frequency ablation catheter |
-
2021
- 2021-01-22 CN CN202120189938.8U patent/CN214805317U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112773499A (en) * | 2021-01-22 | 2021-05-11 | 绵阳立德电子股份有限公司 | Flexible radio frequency ablation catheter |
| CN112773499B (en) * | 2021-01-22 | 2024-09-06 | 绵阳立德电子股份有限公司 | Flexible radio frequency ablation catheter |
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