CN-122005063-A - Water-cooling radio frequency ablation needle

Abstract

The invention discloses a water-cooling radio frequency ablation needle, which relates to the technical field of medical appliances and comprises an ablation needle body, wherein an electrode tube is arranged at the front end of the ablation needle body, a radio frequency electrode is arranged in the electrode tube, the end part of the radio frequency electrode extends out of the electrode tube, the end part of the radio frequency electrode is fixedly connected with a temperature probe, the temperature probe is in a conical structure, and the lower bottom surface of the temperature probe is propped against the end surface of the electrode tube. Through the arrangement of the invention, the temperature probe can be closer to the nerve tissue ablation part, and the influence of an intermediate medium on temperature conduction is reduced, so that the temperature of an ablation region is accurately detected, the temperature probe is in a conical structure, the tip is designed to be beneficial to the smooth penetration of tissues and is directly contacted with target nerve tissues, and compared with other shapes, the conical structure can reduce the tissue resistance and acquire the real tissue temperature more quickly and accurately.

Inventors

• LI YANG

Assignees

• 江苏铭盛医疗科技有限公司

Dates

Publication Date

20260512

Application Date

20260403

Claims (9)

1. 1. The utility model provides a water-cooling radio frequency ablation needle, its characterized in that includes the ablation needle body, ablation needle body front end is provided with the electrode tube, be provided with the radio frequency electrode in the electrode tube, the tip of radio frequency electrode extends outside the electrode tube, the tip fixedly connected with temperature probe of radio frequency electrode, temperature probe is the toper structure, the lower bottom surface of temperature probe offsets with the terminal surface of electrode tube.
2. 2. The water-cooled rf ablation needle according to claim 1, wherein a first coolant tube and a second coolant tube are disposed within the electrode tube, the end of the first coolant tube being adjacent to a first inner end surface of the electrode tube, the second coolant tube being adjacent to a second inner end surface of the electrode tube, the first inner end surface and the second inner end surface being disposed opposite one another.
3. 3. The water-cooled radio frequency ablation needle of claim 2, wherein the first coolant tube and the second coolant tube are connected to a coolant connection port, and two independent sets of pipes are provided on the coolant connection port and are connected to the two coolant tubes respectively.
4. 4. The water-cooled radio frequency ablation needle according to claim 1, wherein the temperature probe is of a conical structure or a pyramid structure, and an antioxidant layer is arranged on the outer surface of the temperature probe.
5. 5. A water-cooled radio frequency ablation needle according to claim 1, wherein the ablation needle body is in the shape of an elongated rod, and is covered with an insulating coating on the surface, the coating being composed of a high temperature resistant and biocompatible material, and the ablation needle body is provided with a negative plate.
6. 6. The water-cooling radio frequency ablation needle according to claim 1, wherein the outer wall of the ablation needle body is provided with pressure sensors in a distributed array design, and the pressure sensors are uniformly distributed in a spiral shape along the outer wall of the ablation needle body.
7. 7. The water-cooling radio frequency ablation needle according to claim 1, wherein the ablation needle body further comprises an adjustable bending structure, the adjustable bending structure is arranged in the middle of the ablation needle body and consists of an adjusting spring and an internal traction steel wire, a control handle is arranged on the outside of the adjustable bending structure, the bending angle and the bending direction of the front section of the ablation needle body can be controlled by pulling the traction steel wire, and a protective film is coated on the outer wall of the adjusting spring.
8. 8. The water-cooled radio frequency ablation needle according to claim 1, wherein two sets of internal temperature measurement probes are arranged in the electrode tube, and the two sets of internal temperature measurement probes are symmetrically arranged on two sides of the radio frequency electrode.
9. 9. The water-cooled rf ablation needle according to claim 1, wherein a thermal insulation layer is disposed between the electrode tube and the temperature probe.

Description

Water-cooling radio frequency ablation needle Technical Field The invention relates to the technical field of medical appliances, in particular to a water-cooling radio frequency ablation needle. Background In the field of nerve tissue ablation treatment, a water-cooling radio frequency ablation needle generates an electromagnetic field through a radio frequency electrode to cause heat generation and death of focus tissues, and a technical principle that excessive heat is taken away by circulating cooling liquid is utilized, so that the water-cooling radio frequency ablation needle becomes a common treatment means in clinic. The existing water-cooling radio frequency ablation needle generally comprises an ablation needle body, wherein an electrode tube is arranged at the front end of the ablation needle body, a radio frequency electrode is arranged in the electrode tube, a temperature probe is connected inside the electrode tube, and a first cooling liquid tube and a second cooling liquid tube for cooling liquid circulation are arranged in the electrode tube. However, the prior art still has certain limitations. On the one hand, heat generated during operation of the radio-frequency electrode can be conducted through the electrode tube, the temperature probe is arranged in the inner space of the electrode tube, so that the temperature measured by the temperature probe is easily interfered by the heat of the electrode tube, the actual temperature of a nerve tissue ablation part cannot be accurately reflected, the regulation and control of radio-frequency energy and water cooling circulation by medical staff are further influenced, the ablation treatment is difficult to be ensured to be carried out in an optimal temperature interval, and the condition that normal tissues are not thoroughly ablated or excessively ablated and damaged possibly occurs. On the other hand, the temperature probe is in a high-temperature environment influenced by the heat in the electrode tube for a long time, the sensor performance is easy to decline, the aging speed is accelerated, the failure rate and the maintenance cost of equipment are increased, and the reliability of temperature measurement data is reduced. In addition, the heat of the electrode tube is conducted to the temperature probe, the heat dissipation target of the water cooling assembly can be dispersed, the heat dissipation efficiency of the cooling liquid to the electrode tube is reduced, the heat control capability of the water cooling system to the ablation process is weakened, and the risk that normal tissues are damaged due to overheating is increased. Therefore, improvement on the existing water-cooling radio frequency ablation needle structure is needed to solve the technical problems and improve the safety and effectiveness of the nerve tissue ablation treatment. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a water-cooling radio frequency ablation needle. In order to achieve the above purpose, the present invention adopts the following technical scheme: The utility model provides a water-cooling radio frequency ablation needle, includes the ablation needle body, ablation needle body front end is provided with the electrode tube, be provided with the radio frequency electrode in the electrode tube, the tip of radio frequency electrode extends outside the electrode tube, the tip fixedly connected with temperature probe of radio frequency electrode, temperature probe is the toper structure, the lower bottom surface of temperature probe offsets with the terminal surface of electrode tube. Further, a first cooling liquid pipe and a second cooling liquid pipe are arranged in the electrode pipe, the end part of the first cooling liquid pipe is close to the first inner end face of the electrode pipe, the second cooling liquid pipe is close to the second inner end face of the electrode pipe, and the first inner end face and the second inner end face are oppositely arranged. Further, the first cooling liquid pipe and the second cooling liquid pipe are connected with a cooling liquid connecting pipe port, and two groups of independent pipelines are arranged on the cooling liquid connecting pipe port and are respectively connected with the two cooling pipes. Further, the temperature probe is of a conical structure or a pyramid structure, and an antioxidant layer is arranged on the outer surface of the temperature probe. Further, the ablation needle body is in an elongated rod shape, the surface of the ablation needle body is covered with an insulating coating, the coating is made of a high-temperature-resistant biocompatible material, and the ablation needle body is provided with a negative plate. Further, the outer wall of the ablation needle body is provided with pressure sensors in a distributed array design, and the pressure sensors are uniformly distributed in a spiral mode along the outer wall of the ablation ne