A cryosurgical probe

Abstract

This application relates to a low-temperature plasma surgical electrode, comprising: an electrode rod, a wire core plug disposed at one end of the electrode rod, a ceramic head disposed at the other end of the electrode rod, a handle portion disposed on the electrode rod, a phase change material container disposed within the electrode rod, and a plurality of electrode needles passing through the phase change material container and extending to the outside of the ceramic head. The phase change material container is located near the ceramic head and contains phase change material. The low-temperature plasma surgical electrode designed in this application can transfer electrode heat to the phase change material through the phase change material container. When the temperature reaches the phase change temperature of the phase change material, the phase change material absorbs heat and gradually changes from a solid phase to a liquid phase, while maintaining a constant temperature, thus keeping the entire surgical electrode at a low temperature and reducing the risk of burns to patients.

Description

Technical Field

[0001] This utility model relates to the field of surgical procedures, and in particular to a low-temperature plasma surgical electrode. Background Technology

[0002] In modern surgery, plasma surgical electrodes have become an important medical tool due to their high efficiency in procedures such as cutting, ablation, and coagulation. However, during these procedures, the temperature of the electrode wire gradually rises as energy is continuously released, a phenomenon that can cause a series of problems that cannot be ignored.

[0003] On the one hand, the high temperature of the electrode wires may burn patients, causing additional trauma and pain, and may even lead to postoperative complications such as infection, seriously affecting the surgical outcome and the patient's recovery process. On the other hand, high temperatures accelerate the aging of electrode materials, causing a decline in electrode performance, shortening their lifespan, and increasing medical costs.

[0004] Although the industry has long recognized this problem, a simple and reliable self-cooling solution for electrodes remains lacking in current technology. This is especially true within the limited structural space of plasma surgical electrodes, where achieving constant temperature control presents a significant challenge. Current technologies are either structurally complex, making integration in confined spaces, or their cooling effects are unstable, failing to ensure the electrode remains within a safe temperature range throughout surgery. This technological deficiency not only limits the further application of plasma surgical electrodes but also negatively impacts the safety and cost-effectiveness of surgeries. Utility Model Content

[0005] The purpose of this application is to solve the problem that the high temperature of existing surgical electrodes can easily cause harm to patients and affect the lifespan of the electrodes.

[0006] To achieve the above objectives, this application provides a low-temperature plasma surgical electrode, comprising: an electrode rod, a wire core cable plug disposed at one end of the electrode rod, a ceramic head disposed at the other end of the electrode rod, and a handle portion disposed on the electrode rod;

[0007] The electrode rod contains a phase change material container and several electrode needles that pass through the phase change material container and extend to the outside of the ceramic head. The phase change material container is located at one end near the ceramic head and contains phase change material.

[0008] More specifically, the other end of the electrode rod has a curved structure, and the ceramic head is located at the end of the curved structure away from the wire core cable plug.

[0009] More specifically, the phase change material container extends into the ceramic head.

[0010] More specifically, several of the electrode needles are geometrically symmetrically distributed on the circular cross-section of the electrode rod.

[0011] More specifically, an electrode plate is provided at the end of the ceramic head away from the core cable plug, and several electrode needles pass through the electrode plate and extend to the outside.

[0012] More specifically, the number of electrode needles is 3.

[0013] More specifically, one end of several of the electrode needles is crimped together and extends to the electrical connection of the core cable plug.

[0014] More specifically, the end of the electrode needle extending beyond the ceramic head is spherical.

[0015] More specifically, the outer surface of the electrode rod is partially wrapped with heat-shrinkable insulating tubing, and the outer surface of the electrode needle is partially wrapped with insulating tubing.

[0016] More specifically, it also includes a temperature sensor for measuring the temperature of the phase change material, a signal light disposed on the handle, and a signal processor connecting the temperature sensor and the signal light.

[0017] The beneficial effects of this application are:

[0018] Good temperature control: By setting up a phase change material container and phase change material, and taking advantage of the characteristic of phase change material to absorb or release a large amount of heat during the phase change process, the working temperature of the electrode can be effectively controlled to avoid the patient being burned due to excessive temperature.

[0019] Timely temperature monitoring: The combination of temperature sensors, signal processors, and indicator lights enables real-time monitoring of the phase change material's temperature and timely feedback to doctors via the indicator light status. This allows doctors to accurately determine whether the electrodes are in normal working order, reducing surgical risks.

[0020] Reasonable structure: The bending structure of the electrode rod, the symmetrical distribution of the electrode needles, the setting of the electrode plates, and the wrapping of the insulating tube make the overall structure of the electrode more reasonable, which not only facilitates operation, but also improves the stability and safety of the surgery. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the low-temperature plasma surgical electrode in this application;

[0022] Figure 2 This is a partial cross-sectional view of the low-temperature plasma surgical electrode in this application;

[0023] Figure 3 This is a cross-sectional view of the low-temperature plasma surgical electrode in this application;

[0024] Figure 4 This is a partial enlarged view of the electrode head of the low-temperature plasma surgical electrode in this application.

[0025] In the diagram: 1. Electrode rod; 2. Handle; 3. Cable plug; 4. Electrode needle; 5. Electrode plate; 6. Ceramic head; 7. Stainless steel tube; 8. Insulating tube; 9. Heat shrinkable insulating tube; 10. Phase change material container; 11. Phase change material. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] During the cutting, ablation, and coagulation processes, plasma surgical electrodes release energy, causing the electrode wire temperature to gradually rise. If the temperature is not properly controlled, it may lead to electrode burns to the patient, and prolonged high temperatures will accelerate the aging of the electrode material, affecting the lifespan of the surgical electrode. Traditional plasma surgical electrodes lack reliable self-cooling mechanisms, especially those for achieving constant temperature control within a confined space.

[0030] like Figure 1As shown, this application provides a low-temperature plasma surgical electrode. The main body of the surgical electrode is an electrode rod 1. One end of the electrode rod 1 is provided with a wire core cable plug 3 for electrical connection, and the other end is provided with a ceramic head 6 (made of high-performance ceramic materials such as alumina and zirconium oxide). A handle 2 is also provided on the electrode rod 1. The temperature control principle of the low-temperature plasma surgical electrode is that a phase change material container 10 is provided inside the electrode rod 1. The phase change material container 10 contains a phase change material. When the phase change material absorbs heat, it changes its state of matter (from solid to liquid), but the temperature remains almost unchanged. Therefore, the plasma surgical electrode with the internal phase change material can maintain a low temperature even during long-term operation. The phase change material container 10 is made of insulating material. The phase change material can be composed of paraffin waxes (such as n-hexadecane, n-octadecane, n-eicosane, etc.), fatty acids (such as lauric acid, etc.), hydrated salts (such as calcium chloride hexahydrate, sodium sulfate decahydrate, etc.) or mixtures thereof. To ensure a good heat absorption rate, such as Figure 2 As shown, the phase change material container 10 is located near one end of the ceramic head 6 and extends partially into the interior of the ceramic head 6, which can transfer the heat generated by the electrode head in a timely manner.

[0031] The electrode rod 1 comprises a stainless steel tube 7 and a heat-shrinkable insulating tube 9 that partially encloses the stainless steel tube 7. The heat-shrinkable insulating tube 9 ensures that necessary conductive areas of the stainless steel tube 7 are exposed while also meeting the energy conduction requirements during surgery. The heat-shrinkable insulating tube 9 provides insulation protection for non-working areas, effectively avoiding the risk of accidental conductivity during surgery. The end of the stainless steel tube 7 furthest from the wire core connector 3 has a bent structure. This bent structure design is more ergonomic, allowing doctors to maneuver flexibly during surgery and adapt to different surgical sites.

[0032] In some specific embodiments, the low-temperature plasma surgical electrode has several electrode needles 4, which are key components for generating plasma to achieve surgical cutting and coagulation functions. To avoid unnecessary electrical interference between electrode needles 4 and between electrode needles 4 and other components, and to ensure the stability of energy output, the outer surface of each electrode needle 4 is wrapped with an insulating tube 8. The insulating tube 8 is made of a high-temperature resistant material with excellent insulation properties, capable of withstanding the high temperatures generated by the plasma during surgery, while reliably isolating the electrode needles 4 from external electrical connections, ensuring that the electrode needles 4 generate plasma only in the preset working area.

[0033] To ensure a good electrical connection between the electrode pins 4 and the wire core plug 3, the tail ends of all the electrode pins 4 are crimped together and soldered to one of the wire cores in the wire core plug 3. The other wire core in the wire core plug 3 is soldered to the stainless steel tube 7, and the stainless steel tube 7 and the wire core can form a circuit. Figure 3As shown, on the cross-section of the electrode rod 1, several electrode needles 4 pass through the phase change material container 10 and are geometrically symmetrically distributed on the circular cross-section. This symmetrical distribution helps to ensure that the plasma generated by the electrode during operation is uniformly distributed, improving the stability and precision of the surgery. The number of electrode needles 4 is preferably 3, but it can also be 2, 4, 5 or other numbers.

[0034] like Figure 4 The enlarged view of the electrode head shows that an electrode plate 5 is located at the end of the ceramic head 6 furthest from the wire core cable plug 3. The electrode needle 4 passes through the electrode plate 5 and extends to the outside. The electrode plate can provide a certain degree of fixation and support for the electrode needle. The exposed part of the electrode needle 4 is spherical. The spherical design can avoid the tip of the electrode needle 4 being too sharp and causing unnecessary damage to the patient's tissue.

[0035] In some specific embodiments, the surgical electrode also includes a temperature sensor for measuring the temperature of the phase change material, an indicator light (such as an LED), and a signal processor. The LED indicator light is mounted on the handle 2 and can be clearly observed by the user. The signal processor consists of a threshold circuit, with a threshold value set to X (X is 2-5°C higher than the phase change temperature of the phase change material). When the temperature sensor signal value is ≤ X, the circuit between the temperature signal processor and the LED indicator light is broken, and the LED indicator light does not work, indicating that the product's operating temperature is normal. When the temperature signal value is > X, the circuit between the temperature signal processor and the LED indicator light is established, and the LED indicator light emits a warning red light, indicating that the phase change material has completely changed from a solid phase to a liquid phase. At this point, its temperature control capability is ineffective, reminding the user to stop or replace the surgical electrode in time to prevent burns to the patient. The signal logic circuit can also be set so that the LED indicator light is green when the temperature signal value is ≤ X. The indicator light can also be replaced with a buzzer; when the temperature signal value exceeds the threshold, the buzzer emits an alarm sound signal, prompting the user to stop or replace the surgical electrode in time.

[0036] Specifically, octadecane is used as the phase change material. The phase change temperature of octadecane is approximately 28℃, so the threshold circuit X is set to 32℃. When the temperature signal value is ≤32℃, the circuit between the temperature signal processor and the LED indicator is broken, and the LED indicator does not work, indicating that the product's operating temperature is normal. When the temperature signal value is >32℃, the circuit between the temperature signal processor and the LED indicator is established, and the LED indicator emits a warning red light.

[0037] The embodiments of this utility model have been described in detail above, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A low-temperature plasma surgical electrode, characterized in that, include: The electrode rod comprises a wire core plug at one end of the electrode rod, a ceramic head at the other end of the electrode rod, a handle on the electrode rod, a phase change material container inside the electrode rod, and several electrode needles passing through the phase change material container and extending to the outside of the ceramic head. The phase change material container is located near the ceramic head and contains phase change material.

2. The low-temperature plasma surgical electrode according to claim 1, characterized in that, The other end of the electrode rod is a curved structure, and the ceramic head is located at the end of the curved structure away from the wire core cable plug.

3. The low-temperature plasma surgical electrode according to claim 1, characterized in that, The phase change material container extends into the ceramic head.

4. The low-temperature plasma surgical electrode according to claim 1, characterized in that, Several of the electrode needles are geometrically symmetrically distributed on the circular cross-section of the electrode rod.

5. The low-temperature plasma surgical electrode according to claim 1, characterized in that, An electrode plate is provided at the end of the ceramic head away from the core cable plug, and several electrode needles pass through the electrode plate and extend to the outside.

6. The low-temperature plasma surgical electrode according to claim 1, characterized in that, The number of electrode needles is 3.

7. The low-temperature plasma surgical electrode according to claim 1, characterized in that, One end of several of the electrode needles is crimped together and extends to the electrical connection of the core cable plug.

8. The low-temperature plasma surgical electrode according to claim 7, characterized in that, The end of the electrode needle extending beyond the ceramic head is spherical.

9. The low-temperature plasma surgical electrode according to claim 1, characterized in that, The outer surface of the electrode rod is partially wrapped with heat-shrinkable insulating tubing, and the outer surface of the electrode needle is partially wrapped with insulating tubing.

10. The low-temperature plasma surgical electrode according to claim 1, characterized in that, It also includes a temperature sensor for measuring the temperature of the phase change material, a signal light disposed on the handle, and a signal processor connecting the temperature sensor and the signal light.

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