CN111938809A - Water-cooling type ablation needle - Google Patents
Water-cooling type ablation needle Download PDFInfo
- Publication number
- CN111938809A CN111938809A CN202010837220.5A CN202010837220A CN111938809A CN 111938809 A CN111938809 A CN 111938809A CN 202010837220 A CN202010837220 A CN 202010837220A CN 111938809 A CN111938809 A CN 111938809A
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- China
- Prior art keywords
- water
- pipe
- needle
- coaxial cable
- cavity
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- 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
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
-
- 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
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
- A61B2018/00023—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids closed, i.e. without wound contact by the fluid
Abstract
The invention discloses a water-cooling type ablation needle, which comprises an ablation needle head, a needle tube, an inner water tube, a microwave coaxial cable, a water inlet sleeve, a water outlet sleeve, a water inlet pipe, a water outlet pipe, a water supply device and a negative pressure device, wherein the ablation needle head is connected with the needle tube; a first channel is formed in a gap between the microwave coaxial cable and the inner water pipe, a second channel is formed in a gap between the inner water pipe and the needle tube, and the first channel is communicated with the second channel; a first cavity is formed among the water inlet sleeve, the microwave coaxial cable and the inner water pipe, and a second cavity is formed among the water outlet sleeve, the inner water pipe and the needle tube; the water inlet pipe is communicated with the first cavity, and the water outlet pipe is communicated with the second cavity; the cooling water flows back to the water supply device from the water supply device through the water inlet pipe, the first cavity, the first channel, the second cavity, the water outlet pipe and the negative pressure device in sequence.
Description
Technical Field
The invention relates to the field of medical treatment, in particular to a water-cooling type ablation needle.
Background
In recent years, microwave ablation has rapidly developed to become a main means in clinical tumor treatment, which can directly puncture a microwave needle to a central area of a focus of human tissue, such as a tumor part, under the guidance of modern images of B-ultrasound, CT and the like, polar molecules in the tissue move at a high speed under the action of a microwave field and rub with each other to generate heat, the temperature in the tumor is rapidly increased, when the temperature is increased to about 60 ℃, cancer cell proteins are denatured and solidified, irreversible dehydration and necrosis are caused, in-situ inactivation is carried out on the tumor, and the microwave ablation has the remarkable characteristics of small wound, accuracy, high efficiency and few complications.
In the process of microwave transmission, due to the action of a high-frequency electric field, polarization and electric conduction effects are generated in an insulating dielectric layer, so that microwave energy loss, called dielectric loss, is caused, and the dielectric loss is expressed in the form of converting the microwave energy into heat energy. The medium of the coaxial cable which is inserted into a human body and is hidden in the microwave ablation surgical instrument loses heat, and the accumulated heat is transmitted along with the continuous transmission of microwave energy, so that high temperature is formed, inevitably, the heat can only be conducted to normal tissues contacted with the ablation instrument, serious burn risks exist, troubles are brought to a doctor who performs the operation, and meanwhile, medical accidents are easily caused if the heat exceeds the self-regulation function of the physiology of a patient on the temperature.
Disclosure of Invention
The invention aims to provide a water-cooling type ablation needle, and aims to solve the problem that medical accidents are easily caused by overhigh temperature in the heating process of the ablation needle in the prior art.
In order to achieve the purpose, the invention provides a water-cooling type ablation needle, which comprises an ablation needle head, a needle tube, an inner water tube, a microwave coaxial cable, a water inlet sleeve, a water outlet sleeve, a water inlet tube, a water outlet tube, a water supply device and a negative pressure device, wherein the ablation needle head is connected with the needle tube; the water supply device is respectively communicated with the water inlet pipe and the water outlet pipe, and the negative pressure device is arranged between the water outlet pipe and the water supply device; a first channel is formed in a gap between the microwave coaxial cable and the inner water pipe, a second channel is formed in a gap between the inner water pipe and the needle tube, and the first channel is communicated with the second channel; the water inlet sleeve is arranged on the peripheries of the microwave coaxial cable and the inner water pipe, a first cavity is formed among the water inlet sleeve, the microwave coaxial cable and the inner water pipe, the water outlet sleeve is arranged on the peripheries of the inner water pipe and the needle tube, and a second cavity is formed among the water outlet sleeve, the inner water pipe and the needle tube; the water inlet pipe is communicated with the first cavity, and the water outlet pipe is communicated with the second cavity; the cooling water flows back to the water supply device from the water supply device through the water inlet pipe, the first cavity, the first channel, the second cavity, the water outlet pipe and the negative pressure device in sequence.
Preferably, the microwave coaxial cable also comprises a radio frequency connector connected with the microwave coaxial cable.
Preferably, the radio frequency connector further comprises a transition sleeve, and the transition sleeve is arranged at the periphery of the radio frequency connector and the coaxial cable.
Preferably, the needle is conical.
Preferably, the inner water tube and the needle tube are both made of 304 stainless steel.
Preferably, the negative pressure device is a negative pressure pump.
Preferably, the water supply device is a water bottle.
Preferably, an insulating layer is further provided, and the insulating layer is positioned between the needle tube and the needle head.
Preferably, one end of the water inlet sleeve is hermetically connected with the microwave coaxial cable, and the other end of the water inlet sleeve is hermetically connected with the periphery of the inner water pipe.
Preferably, one end of the water outlet sleeve is in sealing connection with the needle tube, and the other end of the water outlet sleeve is in sealing connection with the water inlet sleeve.
Compared with the prior art, the invention has the advantages that:
the water-cooling type ablation needle has a sufficient cooling effect, ensures that the microwave ablation needle can still stably work under the conditions of high microwave output power and long-time working state, and is not easy to generate medical accidents; meanwhile, the water is recycled, and water resources are saved.
Drawings
FIG. 1 is a schematic view of a water cooled ablation needle of the present invention;
3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 a 3- 3 a 3 in 3 fig. 3 1 3. 3
The reference numbers in the figures illustrate:
1. a water inlet sleeve; 2. discharging the water jacket; 3. a transition sleeve; 4. a microwave coaxial cable; 5. a water inlet pipe; 6. a water outlet pipe; 7. a needle tube; 8. a needle head; 9. an inner water pipe; 10. a first chamber; 11. a second chamber; 12. a first channel; 13. a second channel.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a communication between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention specifically.
Referring to fig. 1 and 2, a water-cooling type ablation needle comprises an ablation needle head 8, a needle tube 7, an inner water tube 9, a microwave coaxial cable 4, a water inlet sleeve 1, a water outlet sleeve 2, a water inlet tube 5, a water outlet tube 6, a water supply device (not shown) and a negative pressure device (not shown), wherein the ablation needle head 8 is connected with the needle tube 7, the microwave coaxial cable 4 is partially arranged in the inner water tube 9 and is coaxial with the inner water tube 9, and the inner water tube 9 is partially arranged in the needle tube 7 and is coaxial with the needle tube 7; the water supply device is respectively communicated with the water inlet pipe 5 and the water outlet pipe 6, and the negative pressure device is arranged between the water outlet pipe 6 and the water supply device; a first channel 12 is formed in a gap between the microwave coaxial cable 4 and the inner water pipe 9, a second channel 13 is formed in a gap between the inner water pipe 9 and the needle tube 7, and the first channel 12 is communicated with the second channel 13; the water inlet sleeve 1 is arranged on the peripheries of the microwave coaxial cable 4 and the inner water pipe 9, a first cavity 10 is formed between the water inlet sleeve 1 and the microwave coaxial cable 4 as well as between the water outlet sleeve 1 and the inner water pipe 9, the water outlet sleeve 2 is arranged on the peripheries of the inner water pipe 9 and the needle tube 7, and a second cavity 11 is formed between the water outlet sleeve 2 and the inner water pipe 9 as well as between the water outlet sleeve 2 and the needle tube 7; the water inlet pipe 5 is communicated with the first cavity 10, and the water outlet pipe 6 is communicated with the second cavity 11; the cooling water flows back to the water supply device from the water supply device through the water inlet pipe 5, the first cavity 10, the first channel 12, the second channel 13, the second cavity 11, the water outlet pipe 6 and the negative pressure device in sequence.
During the process of treating a patient by using ablation, a large amount of heat is generated around the microwave coaxial cable 4, which may cause damage to the patient and may also cause damage to the equipment itself, and the specific heat capacity of water is large, so that the cooling effect is good. As an embodiment of the present invention, one end of the water inlet sleeve 1 is hermetically connected to the microwave coaxial cable 4, and preferably, a sealing ring (not shown) is disposed between the water inlet sleeve 1 and the microwave coaxial cable 4; a sealing ring is also arranged between the other end of the water inlet sleeve 1 and the periphery of the inner water pipe 9, so that the sealing performance of the first cavity 10 is ensured, and the first cavity 10 is not leaked even if filled with cooling water.
Since the first channel 12 is formed by the gap between the microwave coaxial cable 4 and the inner water pipe 9, and the sealed first chamber 10 is formed between the water inlet sleeve 1 and the microwave coaxial cable 4 and the inner water pipe 9, the first channel 12 is communicated with the first chamber 10.
Similarly, a sealing ring is arranged between one end of the water outlet sleeve 2 and the needle tube 7 to realize sealing connection, and the other end of the water outlet sleeve is connected with the water inlet sleeve 1 in a sealing way, so that the sealing performance of the second cavity 11 is ensured, and the second cavity 11 is full of cooling water and cannot leak.
The negative pressure device is preferably a negative pressure pump; since the gap between the inner water pipe 9 and the needle tube 7 forms the second channel 13 and the water outlet sleeve 2 and the second cavity 11 formed between the inner water pipe 9 and the needle tube 7, the second channel 13 is communicated with the second cavity 11; meanwhile, as the first channel 12 is communicated with the second channel 13, under the action of the negative pressure pump, cooling water flows back to the water supply device from the water supply device through the water inlet pipe 5, the first cavity 10, the first channel 12, the second channel 13, the second cavity 11, the water outlet pipe 6 and the negative pressure pump in sequence, so that the circulation of the cooling water is realized; in the process, most of the microwave coaxial cable 4 is coated by the cooling water in the first cavity 10 and the first channel 12, and the flowing cooling water takes away the heat generated by the microwave coaxial cable 4, so that the temperature of the microwave coaxial cable 4 is greatly reduced; therefore, the water-cooling type ablation needle has a sufficient cooling effect, ensures that the microwave ablation needle can still stably work under the conditions of high microwave output power and long-time working state, and is not easy to generate medical accidents; meanwhile, the water is recycled, and water resources are saved.
The inner water pipe 9 and the needle tube 7 are both made of 304 stainless steel, so that the cooling water is not polluted, and the service life is long; the water supply means is preferably a water bottle.
The needle head 8 of the water-cooling type ablation needle is conical, and an insulating layer is arranged between the needle head 8 and the needle tube 7.
In addition, the water-cooling ablation needle further comprises a radio frequency connector (not shown), and the radio frequency connector is connected with the microwave coaxial cable 4; the microwave coaxial cable protection device further comprises a transition sleeve 3, wherein the transition sleeve 3 is arranged on the periphery of the radio frequency connector and the coaxial cable and used for protecting the radio frequency connector and the microwave coaxial cable 4.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. A water-cooling type ablation needle is characterized in that: the microwave coaxial cable is partially arranged in the inner water pipe and is coaxial with the inner water pipe, and the inner water pipe is partially arranged in the needle pipe and is coaxial with the needle pipe; the water supply device is respectively communicated with the water inlet pipe and the water outlet pipe, and the negative pressure device is arranged between the water outlet pipe and the water supply device; a first channel is formed in a gap between the microwave coaxial cable and the inner water pipe, a second channel is formed in a gap between the inner water pipe and the needle tube, and the first channel is communicated with the second channel; the water inlet sleeve is arranged on the peripheries of the microwave coaxial cable and the inner water pipe, a first cavity is formed among the water inlet sleeve, the microwave coaxial cable and the inner water pipe, the water outlet sleeve is arranged on the peripheries of the inner water pipe and the needle tube, and a second cavity is formed among the water outlet sleeve, the inner water pipe and the needle tube; the water inlet pipe is communicated with the first cavity, and the water outlet pipe is communicated with the second cavity; the cooling water flows back to the water supply device from the water supply device through the water inlet pipe, the first cavity, the first channel, the second cavity, the water outlet pipe and the negative pressure device in sequence.
2. The water-cooled cooling ablation needle of claim 1, wherein: the microwave coaxial cable is characterized by also comprising a radio frequency connector connected with the microwave coaxial cable.
3. The water-cooled cooling ablation needle of claim 2, wherein: the transition sleeve is arranged at the periphery of the radio frequency connector and the coaxial cable.
4. The water-cooled cooling ablation needle of claim 1, wherein: the needle head is conical.
5. The water-cooled cooling ablation needle of claim 1, wherein: the inner water pipe and the needle tube are both made of 304 stainless steel.
6. The water-cooled cooling ablation needle of claim 1, wherein: the negative pressure device is a negative pressure pump.
7. The water-cooled cooling ablation needle of claim 1, wherein: the water supply device is a water bottle.
8. The water-cooled cooling ablation needle of claim 1, wherein: an insulating layer is also arranged and is positioned between the needle tube and the needle head.
9. The water-cooled cooling ablation needle of claim 1, wherein: one end of the water inlet sleeve is hermetically connected with the microwave coaxial cable, and the other end of the water inlet sleeve is hermetically connected with the periphery of the inner water pipe.
10. The water-cooled cooling ablation needle of claim 9, wherein: one end of the water outlet sleeve is hermetically connected with the needle tube, and the other end of the water outlet sleeve is hermetically connected with the water inlet sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837220.5A CN111938809A (en) | 2020-08-19 | 2020-08-19 | Water-cooling type ablation needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837220.5A CN111938809A (en) | 2020-08-19 | 2020-08-19 | Water-cooling type ablation needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111938809A true CN111938809A (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010837220.5A Withdrawn CN111938809A (en) | 2020-08-19 | 2020-08-19 | Water-cooling type ablation needle |
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| Country | Link |
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| CN (1) | CN111938809A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112472289A (en) * | 2020-12-15 | 2021-03-12 | 宁波梅山保税港区时顺企业管理合伙企业(有限合伙) | Microwave ablation needle |
| CN113397696A (en) * | 2021-06-29 | 2021-09-17 | 南京诺源医疗器械有限公司 | Ablation needle |
| WO2023087662A1 (en) * | 2021-11-18 | 2023-05-25 | 南京亿高微波系统工程有限公司 | Microwave rounding needle with efficient cooling circulation |
| CN116492045A (en) * | 2023-06-29 | 2023-07-28 | 浙江伽奈维医疗科技有限公司 | Microwave ablation needle and ablation assembly |
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| US5792140A (en) * | 1997-05-15 | 1998-08-11 | Irvine Biomedical, Inc. | Catheter having cooled multiple-needle electrode |
| CA2848436A1 (en) * | 2005-09-27 | 2007-03-27 | Sherwood Services Ag | Cooled rf ablation needle |
| CN103006321A (en) * | 2012-11-08 | 2013-04-03 | 南京维京九洲医疗器械研发中心 | Water-cooling microwave ablation needle-shaped antenna |
| CN103142307A (en) * | 2013-03-27 | 2013-06-12 | 杨兴瑞 | High-performance water-cooled microwave ablation antenna |
| CN104027168A (en) * | 2014-06-20 | 2014-09-10 | 章建全 | Microwave ablation needle antenna with infusion structure for curing cyst |
| CN105596079A (en) * | 2016-02-18 | 2016-05-25 | 赛诺微医疗科技(北京)有限公司 | Antenna component used for microwave ablation and microwave ablation needle adopting same |
| CN108938080A (en) * | 2018-07-26 | 2018-12-07 | 南京康友医疗科技有限公司 | Flexible microwave ablation needle under a kind of endoscopic ultrasonography |
-
2020
- 2020-08-19 CN CN202010837220.5A patent/CN111938809A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5792140A (en) * | 1997-05-15 | 1998-08-11 | Irvine Biomedical, Inc. | Catheter having cooled multiple-needle electrode |
| CA2848436A1 (en) * | 2005-09-27 | 2007-03-27 | Sherwood Services Ag | Cooled rf ablation needle |
| CN103006321A (en) * | 2012-11-08 | 2013-04-03 | 南京维京九洲医疗器械研发中心 | Water-cooling microwave ablation needle-shaped antenna |
| CN103142307A (en) * | 2013-03-27 | 2013-06-12 | 杨兴瑞 | High-performance water-cooled microwave ablation antenna |
| CN104027168A (en) * | 2014-06-20 | 2014-09-10 | 章建全 | Microwave ablation needle antenna with infusion structure for curing cyst |
| CN105596079A (en) * | 2016-02-18 | 2016-05-25 | 赛诺微医疗科技(北京)有限公司 | Antenna component used for microwave ablation and microwave ablation needle adopting same |
| CN108938080A (en) * | 2018-07-26 | 2018-12-07 | 南京康友医疗科技有限公司 | Flexible microwave ablation needle under a kind of endoscopic ultrasonography |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112472289A (en) * | 2020-12-15 | 2021-03-12 | 宁波梅山保税港区时顺企业管理合伙企业(有限合伙) | Microwave ablation needle |
| CN112472289B (en) * | 2020-12-15 | 2022-03-25 | 宁波梅山保税港区时顺企业管理合伙企业(有限合伙) | Microwave ablation needle |
| CN113397696A (en) * | 2021-06-29 | 2021-09-17 | 南京诺源医疗器械有限公司 | Ablation needle |
| WO2023087662A1 (en) * | 2021-11-18 | 2023-05-25 | 南京亿高微波系统工程有限公司 | Microwave rounding needle with efficient cooling circulation |
| CN116492045A (en) * | 2023-06-29 | 2023-07-28 | 浙江伽奈维医疗科技有限公司 | Microwave ablation needle and ablation assembly |
| CN116492045B (en) * | 2023-06-29 | 2023-10-10 | 浙江伽奈维医疗科技有限公司 | Microwave ablation needle and ablation assembly |
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Application publication date: 20201117 |