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CN-224220223-U - Microwave ablation needle with multistage cooling channels

CN224220223UCN 224220223 UCN224220223 UCN 224220223UCN-224220223-U

Abstract

The utility model relates to the technical field of microwave ablation needles, and provides a microwave ablation needle with a multistage cooling channel, which comprises a handle, wherein one end of the handle is provided with an ablation needle tube in a penetrating way through a sealing piece, the other end of the handle is provided with a high-frequency joint in a penetrating way, the interior of the handle is provided with a circulating water cavity, one end of the ablation needle tube is fixedly connected with an insulating sleeve, one end of the insulating sleeve is fixedly provided with an ablation needle head, one end of the ablation needle head is welded with a coaxial cable inner core, the outer side of the ablation needle head is provided with a metal shell, a cooling channel I is formed between the metal shell and the coaxial cable inner core, a plurality of groups of heat conducting fins which are contacted with the coaxial cable inner core are fixedly arranged in the cooling channel I, a cooling channel II is formed between the metal shell and the ablation needle tube, a plurality of heat radiating fins which are fixedly connected with the metal shell are fixedly arranged in the cooling channel II, during operation, cooling liquid is guided into the cooling channel I, conducted heat through the heat conducting fins and cooled and discharged through the cooling channel II, the heat radiating fins prolong the contact time between the cooling liquid and the outer wall of the metal shell, and the cooling effect is enhanced.

Inventors

  • WU HAIMEI

Assignees

  • 百德(苏州)医疗有限公司

Dates

Publication Date
20260512
Application Date
20250512

Claims (6)

  1. 1. The microwave ablation needle with the multistage cooling channels is characterized by comprising a microwave ablation needle, wherein one end of the handle is provided with an ablation needle tube in a penetrating mode through a sealing piece, the other end of the handle is provided with a high-frequency joint in a penetrating mode, a circulating water cavity is formed in the handle, one end of the ablation needle tube is fixedly connected with an insulating sleeve, one section of the insulating sleeve is fixedly provided with an ablation needle head, one end of the ablation needle head is welded with a coaxial cable inner core, the high-frequency joint is fixedly connected with the coaxial cable inner core, the surface of the coaxial cable inner core is coated with an insulating layer, the outer side of the coaxial cable inner core is provided with a metal shell, a plurality of groups of heat conducting fins are fixedly arranged between the metal shell and the coaxial cable inner core, a plurality of groups of heat conducting fins are in contact with the coaxial cable inner core, a cooling channel II is fixedly arranged between the metal shell and the ablation tube, a plurality of groups of heat radiating sheets are fixedly connected with the metal shell.
  2. 2. A microwave ablation needle according to claim 1, wherein the circulating water chamber is in communication with the cooling channels.
  3. 3. The microwave ablation needle with the multistage cooling channel according to claim 1, wherein a water inlet capillary is arranged in the handle in a penetrating manner, the water inlet capillary is communicated with the first cooling channel, a water outlet is formed in one end, close to the ablation needle, of the metal shell, and the water outlet is communicated with the first cooling channel.
  4. 4. The microwave ablation needle with the multistage cooling channel according to claim 3, wherein a water outlet capillary is arranged in the handle in a penetrating manner, and a plurality of groups of thermocouple temperature sensors are fixedly arranged in the handle.
  5. 5. The microwave ablation needle with the multistage cooling channel according to claim 3, wherein a water inlet is formed in one end of the metal shell, which is close to the water inlet capillary tube, and the water inlet is fixedly connected with the water inlet capillary tube.
  6. 6. The microwave ablation needle with the multistage cooling channel according to claim 4, wherein a processing alarm module is fixedly arranged on the outer side of the grip, and the processing alarm module is electrically connected with a plurality of groups of thermocouple temperature sensors.

Description

Microwave ablation needle with multistage cooling channels Technical Field The utility model relates to the technical field of microwave ablation needles, in particular to a microwave ablation needle with a multistage cooling channel. Background The microwave ablation needle is a medical instrument for tumor treatment, and the purpose of ablating tumors is achieved by transmitting microwave energy to tumor tissues to generate high temperature. In the microwave ablation process, due to the action of microwave energy, the needle tip and the needle body of the ablation needle can generate a large amount of heat, if the heat cannot be effectively emitted in time, the ablation effect can be affected, and the surrounding normal tissues can be thermally damaged, so that unnecessary medical accidents are caused. The prior Chinese patent with publication number of CN221083792U discloses a sterile disposable microwave ablation needle, after the ablation needle is subjected to microwave ablation, cooling water is firstly led into the tail end of the ablation needle tube through a water inlet capillary tube, so that the cooling water flows out of the other end of the ablation needle tube and flows into a water cavity, the cooling water filled in the water cavity is used for cooling the inner core of a coaxial cable in the ablation needle tube in a water-cooling way, the cooling water temperature is detected through a thermocouple element arranged, and after the cooling water is overheated, the cooling water is slowly led out through a water outlet and a water outlet tube, so that the water-cooling circulation is completed. For the related art in the foregoing, during microwave ablation, a large amount of heat is generated by the coaxial cable core, and the single water inlet and outlet channels may not be capable of rapidly and effectively taking away the heat, especially in long-time and high-power ablation operation, it is difficult to maintain a stable cooling temperature, performance and service life of the ablation needle may be affected, and at the same time, potential risks of thermal damage may be caused to surrounding tissues. Disclosure of utility model The utility model aims to overcome the defects of the prior art, and provides a microwave ablation needle with a multi-stage cooling channel, which aims to solve the problem that a coaxial cable inner core can generate a large amount of heat in the microwave ablation process, and a single water inlet channel and a single water outlet channel can not take away the heat rapidly and effectively. In order to solve the technical problems, the microwave ablation needle with the multistage cooling channels comprises a microwave ablation needle, wherein the microwave ablation needle comprises a handle, one end of the handle is provided with an ablation needle tube in a penetrating way through a sealing piece, the other end of the handle is provided with a high-frequency joint in a penetrating way, the interior of the handle is provided with a circulating water cavity, one end of the ablation needle tube is fixedly connected with an insulating sleeve, one section of the insulating sleeve is fixedly provided with an ablation needle head, one end of the ablation needle head is welded with a coaxial cable inner core, the high-frequency joint is fixedly connected with the coaxial cable inner core, the surface of the coaxial cable inner core is coated with an insulating layer, the outer side of the coaxial cable inner core is provided with a metal shell, a cooling channel I is arranged between the metal shell and the coaxial cable inner core, a plurality of heat conducting fins are fixedly arranged between the cooling channels I, the plurality of heat conducting fins are contacted with the coaxial cable inner core, a cooling channel II is arranged between the metal shell and the ablation needle tube, a plurality of heat radiating fins are fixedly connected with the metal shell, when the microwave ablation needle is used, a large amount of heat is generated by the coaxial cable inner core, a single water inlet and outlet channels are difficult to meet the requirements of high-speed and high efficiency, especially when long-time heat is dissipated, the high-temperature is not required, the heat is stable, the heat is discharged from the metal shell through the cooling fin through the cooling channels, and the cooling channels through the cooling channels, the cooling channels is simultaneously cooled down through the cooling channels, the metal shell is stable heat conducting channels, and the heat is cooled down through the metal shell, and the heat conducting channels and the heat is cooled down through the metal shell, the contact time between the cooling water and the outer wall of the metal shell is prolonged, the cooling water passes through the outer wall of the metal shell along the S-shaped trend, the flow direction of the cooling medium is opposite to the microwave