CN108309437B - Radio frequency ablation needle - Google Patents
Radio frequency ablation needle Download PDFInfo
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- CN108309437B CN108309437B CN201810145018.9A CN201810145018A CN108309437B CN 108309437 B CN108309437 B CN 108309437B CN 201810145018 A CN201810145018 A CN 201810145018A CN 108309437 B CN108309437 B CN 108309437B
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- Prior art keywords
- needle
- radio frequency
- needle tube
- insulating outer
- frequency cable
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- 238000007674 radiofrequency ablation Methods 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004809 Teflon Substances 0.000 claims description 5
- 229920006362 Teflon® Polymers 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000002679 ablation Methods 0.000 abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000009529 body temperature measurement Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002595 magnetic resonance imaging Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00595—Cauterization
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00791—Temperature
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Otolaryngology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a radio frequency ablation needle which comprises a positive electrode needle head, an insulating outer needle tube, a negative electrode plate and a second radio frequency cable, wherein the positive electrode needle head is fixed at the first end of the insulating outer needle tube, and the second end of the insulating outer needle tube is provided with the first radio frequency cable; the first radio frequency cable is electrically communicated with the positive electrode needle; mounting holes are formed in preset positions of the insulating outer needle tubes; the negative plate is tightly wrapped by the mounting hole; the second radio frequency cable is located in the insulating outer needle tube, the first end of the second radio frequency cable is electrically connected with the negative electrode plate, and the second end of the second radio frequency cable extends out of the second end of the insulating outer needle tube. When the device is applied, the positive electrode needle head pierces human tissue to reach the focus area, and the radio frequency current forms a loop through the first radio frequency cable, the positive electrode needle head, the human focus area, the negative electrode plate and the second radio frequency cable, so that ablation is realized. The radio frequency ablation needle can form an electrified loop in use, avoids the application of a negative plate, and prevents the damage to human skin caused by the temperature rise of the negative plate in operation.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a radio frequency ablation needle.
Background
The radiofrequency ablation is a diagnosis and treatment mode for minimally invasive treatment by applying a radiofrequency ablation needle, and can be used for tumors or spines. In the operation process, the radio frequency ablation needle is required to be inserted into a focus part, and the back of a patient is tied with the negative plate, so that the radio frequency energy passing through the loop causes the tissue to oscillate and heat up, and the focus is irreversibly necrotized, thereby achieving the purpose of ablation.
However, the negative plate is heated to a certain extent in the operation process, and the skin of the human body is damaged.
In addition, in order to accurately ablate focus tissues, magnetic resonance equipment can be adopted to scan focus tissues to obtain magnetic resonance images, the degree of ablation is judged, the focus is completely ablated in the ablation process, and the damage of normal tissues is reduced as much as possible. However, most of the materials of the existing radio frequency ablation needle are metal materials, so that the existing radio frequency ablation needle is large in magnetism and not suitable for being used in a magnetic resonance environment.
In summary, how to avoid damaging human skin due to temperature rise of the negative plate during operation is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a radio frequency ablation needle having a negative electrode plate, which can form an electrical loop, avoid using a negative electrode plate, and prevent damage to human skin due to temperature rise of the negative electrode plate during operation.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a radio frequency ablation needle comprising
An anode needle;
The positive electrode needle is fixed at the first end of the insulating outer needle tube, and a first radio frequency cable is arranged at the second end of the insulating outer needle tube; the first radio frequency cable is in electrical communication with the positive needle; a mounting hole is formed in a preset position of the insulating outer needle tube;
The negative plate is tightly wrapped by the mounting hole;
The second radio frequency cable is positioned in the insulating outer needle tube, the first end of the second radio frequency cable is electrically connected with the negative electrode plate, and the second end of the second radio frequency cable extends out of the second end of the insulating outer needle tube.
Preferably, in the radio frequency ablation needle, the positive electrode needle is a carbon fiber positive electrode needle; the insulation outer needle tube comprises a needle tube main body and an insulation layer arranged on the outer surface of the needle tube main body; the positive electrode needle head is fixedly connected with the needle tube main body.
Preferably, in the radio frequency ablation needle, the positive electrode needle head and the needle tube main body are of an integrated structure.
Preferably, the radio frequency ablation needle further comprises a plurality of temperature sensors, wherein the temperature sensors are distributed inside the insulated outer needle tube and the positive needle head.
Preferably, in the radio frequency ablation needle, the temperature sensor includes a needle temperature sensor, a negative electrode plate temperature sensor, and an intermediate temperature sensor disposed at an intermediate position of both the needle temperature sensor and the negative electrode plate temperature sensor.
Preferably, in the radio frequency ablation needle, the temperature sensor is composed of a T-shaped thermocouple wire, and teflon catheters are wrapped at positions, used for assembling the temperature sensor, in the insulating outer needle tube and the positive needle head.
Preferably, in the radio frequency ablation needle, the negative electrode plate is a copper negative electrode plate.
The invention provides a radio frequency ablation needle which comprises a positive electrode needle head, an insulating outer needle tube, a negative electrode plate and a second radio frequency cable, wherein the positive electrode needle head is fixed at a first end of the insulating outer needle tube, and the second end of the insulating outer needle tube is provided with the first radio frequency cable; the first radio frequency cable is electrically communicated with the positive electrode needle; mounting holes are formed in preset positions of the insulating outer needle tubes; the negative plate is tightly wrapped by the mounting hole; the second radio frequency cable is located in the insulating outer needle tube, the first end of the second radio frequency cable is electrically connected with the negative electrode plate, and the second end of the second radio frequency cable extends out of the second end of the insulating outer needle tube.
When the device is applied, the positive electrode needle head pierces human tissue to reach the focus area, and the radio frequency current forms a loop through the first radio frequency cable, the positive electrode needle head, the human focus area, the negative electrode plate and the second radio frequency cable, so that ablation is realized.
Obviously, the radio frequency ablation needle provided by the invention can form an electrified loop in use, avoids the application of a negative plate, and prevents the damage to human skin caused by the temperature rise of the negative plate in operation.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a radiofrequency ablation needle according to an embodiment of the present invention;
Wherein, in fig. 1 above:
A needle temperature sensor 101; an insulating outer needle tube 102; a negative electrode sheet 103; a first radio frequency cable 104; a second radio frequency cable 105; a temperature measurement wire 106; a negative electrode sheet temperature sensor 107; an intermediate temperature sensor 108; a positive electrode needle 109.
Detailed Description
The embodiment of the invention discloses a radio frequency ablation needle which is provided with a negative plate, can form an electrifying loop, avoids adopting a negative plate, and prevents the damage to human skin caused by the temperature rise of the negative plate in operation.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a radio frequency ablation needle, which includes a positive electrode needle 109, an insulating outer needle tube 102, a negative electrode plate 103 and a second radio frequency cable 105, wherein the positive electrode needle 109 is fixed at a first end of the insulating outer needle tube 102, and a first radio frequency cable 104 is installed at a second end of the insulating outer needle tube 102; the first radio frequency cable is in electrical communication with the positive needle 109; mounting holes are formed in preset positions of the insulating outer needle tube 102; the negative plate 103 is tightly wrapped by the mounting hole; the second radio frequency cable 105 is located in the insulating outer needle tube 102, and a first end of the second radio frequency cable 105 is electrically connected with the negative electrode plate 103, and a second end of the second radio frequency cable 105 extends out from the second end of the insulating outer needle tube 102.
When the device is applied, the positive electrode needle head 109 pierces human tissue to reach a focus area, and radio frequency current forms a loop through the first radio frequency cable 104, the positive electrode needle head 109, the human focus area, the negative electrode plate 103 and the second radio frequency cable, so that ablation is realized.
Obviously, the radio frequency ablation needle provided by the embodiment has a single-needle multipolar structure (namely, one radio frequency ablation needle is provided with a positive electrode and a negative electrode), an electrified loop can be formed in use, a negative plate is prevented from being applied, and the damage to human skin caused by the temperature rise of the negative plate in operation is prevented.
Specifically, in the radio frequency ablation needle provided in the above embodiment, the positive electrode needle 109 is a carbon fiber positive electrode needle 109; the insulating outer needle tube 102 comprises a needle tube body and an insulating layer arranged on the outer surface of the needle tube body; the positive electrode needle 109 is fixedly connected to the needle tube body. The negative electrode sheet 103 is a copper negative electrode sheet, preferably a red copper negative electrode sheet, and more preferably a T2 red copper negative electrode sheet.
In the radio frequency ablation needle provided in this embodiment, the positive electrode needle 109 and the insulating outer needle tube 102 respectively adopt carbon fiber materials as processing materials, meanwhile, the negative electrode plate 103 is set to be a copper negative electrode plate, and the high conductivity and the non-magnetism of the carbon fiber materials and the copper materials are utilized to ensure that the radio frequency ablation needle cannot be interfered by metal artifacts in the magnetic resonance imaging process. Meanwhile, the carbon fiber material has high rigidity, so that the radiofrequency ablation needle is ensured not to bend in the process of puncturing so as not to influence the ablation effect.
Preferably, in the above-mentioned rf ablation needle, the positive electrode needle 109 and the needle tube body are integrally formed. The insulating layer provided on the outer surface of the needle tube body is a teflon material layer sprayed at the outer surface of the needle tube body, and the wall thickness thereof may be set to 0.4mm.
In the above radio frequency ablation needle, the first radio frequency cable 104 is electrically connected with the positive electrode needle 109 through the needle tube body, and the first radio frequency cable 104 is fixed inside the needle tube body through the nonmagnetic silver conductive electric adhesive. The negative electrode sheet 103 is insulated from the insulating outer needle tube 102, that is, the negative electrode sheet 103 is insulated from the needle tube body.
Preferably, the radio frequency ablation needle further comprises a plurality of temperature sensors, wherein the temperature sensors are distributed inside the insulated outer needle tube 102 and the positive needle 109 and are used for measuring the temperature during ablation in real time so as to enable a user to judge the progress of ablation.
Specifically, the above-mentioned temperature sensors are three, including the needle temperature sensor 101, the negative electrode sheet temperature sensor 107, and the intermediate temperature sensor 108 provided at an intermediate position of both the needle temperature sensor 101 and the negative electrode sheet temperature sensor 107.
The temperature sensor is composed of T-shaped thermocouple wires, and the positions, used for assembling the temperature sensor, in the insulated outer needle tube 102 and the positive electrode needle 109 are respectively wrapped with a Teflon catheter, so that the temperature sensor is not interfered by radio frequency current in the temperature measurement process.
The temperature measurement lead 106 of the above-described temperature sensor extends out of the insulated outer needle tube 102 via the second end of the insulated outer needle tube 102.
The length of the radiofrequency ablation needle can be set to be 15cm; the outer diameter of the insulating outer needle tube 102 is set to 2.45mm, and the inner diameter is set to 2mm; the length of the positive electrode needle 109 is set to 5mm, and the tip of the positive electrode needle 109 may be in a pyramid shape surrounded by a plurality of inclined planes, but may be in other shapes, which is not limited in this embodiment. The preset position of the mounting hole provided on the insulating outer needle tube 102 is a position 2cm away from the needle tip. The negative electrode sheet 103 has a copper ring structure, and has a width of 5mm.
The radio frequency ablation needle provided by the embodiment of the invention has the advantages of simple structure, convenience in production and manufacture and low production cost.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A radio frequency ablation needle comprising:
An anode needle;
The positive electrode needle is fixed at the first end of the insulating outer needle tube, and a first radio frequency cable is arranged at the second end of the insulating outer needle tube; the first radio frequency cable is in electrical communication with the positive electrode needle; a mounting hole is formed in a preset position of the insulating outer needle tube; the insulation outer needle tube comprises a needle tube main body and an insulation layer arranged on the outer surface of the needle tube main body; the positive electrode needle head and the needle tube main body are of an integrated structure; the insulating layer is a Teflon material layer sprayed on the outer surface of the needle tube main body;
The negative plate is tightly wrapped by the mounting hole;
The second radio frequency cable is positioned in the insulating outer needle tube, the first end of the second radio frequency cable is electrically connected with the negative electrode plate, and the second end of the second radio frequency cable extends out from the second end of the insulating outer needle tube;
the radio frequency ablation needle also comprises a plurality of temperature sensors which are distributed in the insulating outer needle tube and the positive electrode needle head;
The temperature sensor comprises a needle temperature sensor, a negative electrode plate temperature sensor and an intermediate temperature sensor arranged at the intermediate position of the needle temperature sensor and the negative electrode plate temperature sensor; the temperature sensor consists of a T-shaped thermocouple wire, and a Teflon catheter is wrapped at the positions for assembling the temperature sensor in the insulated outer needle tube and the positive needle head;
the outer diameter of the insulating outer needle tube is 2.45mm, and the inner diameter is set to be 2mm; the length of the positive electrode needle head is 5mm; the preset position of the mounting hole on the insulating outer needle tube is a position 2cm away from the needle point.
2. The radiofrequency ablation needle of claim 1, wherein the positive needle is a carbon fiber positive needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145018.9A CN108309437B (en) | 2018-02-12 | 2018-02-12 | Radio frequency ablation needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145018.9A CN108309437B (en) | 2018-02-12 | 2018-02-12 | Radio frequency ablation needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108309437A CN108309437A (en) | 2018-07-24 |
| CN108309437B true CN108309437B (en) | 2024-08-27 |
Family
ID=62903562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810145018.9A Active CN108309437B (en) | 2018-02-12 | 2018-02-12 | Radio frequency ablation needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108309437B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115399869A (en) * | 2022-11-02 | 2022-11-29 | 杭州维纳安可医疗科技有限责任公司 | Ablation needle, processing technology, ablation system and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102458289A (en) * | 2009-06-09 | 2012-05-16 | 友和安股份公司 | Direction-controllable electrode body for selectively removing bodily tissue, and guide pipe |
| CN102933167A (en) * | 2010-01-26 | 2013-02-13 | 太雄医疗器株式会社 | Electrode needle and hemostatic device including the same |
| EP2626021A1 (en) * | 2012-02-10 | 2013-08-14 | Myong-Ki Jun | Electrode tip for radiofrequency tissue ablation and electrode having the same |
| CN103957979A (en) * | 2011-11-29 | 2014-07-30 | 皇家飞利浦有限公司 | Tube for being introduced into an object |
| CN208598511U (en) * | 2018-02-12 | 2019-03-15 | 安徽福晴医疗科技有限公司 | A kind of radio frequency ablation needle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588864A4 (en) * | 1991-05-24 | 1996-01-10 | Ep Technologies | Combination monophasic action potential/ablation catheter and high-performance filter system |
| CN102228392B (en) * | 2011-06-27 | 2013-01-09 | 北京畅想天行医疗技术有限公司 | Radio-frequency ablation electrode needle |
-
2018
- 2018-02-12 CN CN201810145018.9A patent/CN108309437B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102458289A (en) * | 2009-06-09 | 2012-05-16 | 友和安股份公司 | Direction-controllable electrode body for selectively removing bodily tissue, and guide pipe |
| CN102933167A (en) * | 2010-01-26 | 2013-02-13 | 太雄医疗器株式会社 | Electrode needle and hemostatic device including the same |
| CN103957979A (en) * | 2011-11-29 | 2014-07-30 | 皇家飞利浦有限公司 | Tube for being introduced into an object |
| EP2626021A1 (en) * | 2012-02-10 | 2013-08-14 | Myong-Ki Jun | Electrode tip for radiofrequency tissue ablation and electrode having the same |
| CN208598511U (en) * | 2018-02-12 | 2019-03-15 | 安徽福晴医疗科技有限公司 | A kind of radio frequency ablation needle |
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| Publication number | Publication date |
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| CN108309437A (en) | 2018-07-24 |
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