Plasma treatment device and control method thereof

Abstract

This invention relates to the field of medical device technology, providing a plasma therapy device and its control method. The plasma therapy device includes a flexible plasma patch, a power supply module, and a control module. The flexible plasma patch comprises a first dielectric barrier layer, an electrode layer, a second dielectric barrier layer, and a medical film layer stacked sequentially from top to bottom. The medical film layer is suitable for contact with the wound surface. The electrode layer includes a positive electrode, a negative electrode, and an auxiliary electrode. The positive and negative electrodes are coplanarly disposed on a substrate, and the auxiliary electrode is connected to the negative electrode to change the electric field distribution. The power supply module is electrically connected to the positive and negative electrodes. The control module is connected to the power supply module to control the operation of the power supply module. This invention can better control the spatial distribution of the electric field, achieve refined management of the plasma generation area, avoid hot spots or dead zones, ensure uniform energy deposition, and improve the safety of the flexible plasma patch.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a plasma therapy device and its control method. Background Technology

[0002] Plasma therapy devices are innovative medical instruments that combine modern technology with traditional therapies, applied in various fields such as wound healing, skin disease treatment, and pain relief. The core of plasma therapy devices lies in the generation of bioactive particles through controllable plasma technology, thereby promoting tissue repair and regeneration. Plasma is a special state of matter containing high-energy electrons, ions, and neutral particles. Low-temperature plasma, due to its low temperature and active biochemical properties, has significant advantages, particularly in sterilization, promoting healing, promoting blood clotting, and killing tumor cells.

[0003] Although plasma therapy devices in related technologies can achieve functions such as wound healing and skin disease treatment through flexible plasma patches, flexible plasma patches are prone to generating hot spots or dead zones during operation. When hot spots are generated, excessive heat concentration leads to a sharp increase in local temperature, which can easily cause protein denaturation and cell membrane damage, delaying or even hindering wound healing. "Dead zones" mean areas where the treatment method cannot reach or where the force is insufficient, and the plasma cannot be evenly distributed, weakening the sterilization and disinfection effect. Summary of the Invention

[0004] This invention provides a plasma therapy device and its control method to overcome the aforementioned technical deficiencies in the prior art. It can better control the spatial distribution of the electric field, achieve refined management of the plasma generation area, avoid hot spots or dead zones, ensure uniform energy deposition, and improve the safety of flexible plasma patches.

[0005] The first aspect of this invention provides a plasma therapy device, comprising a flexible plasma patch, a power supply module, and a control module. The flexible plasma patch includes a first dielectric barrier layer, an electrode layer, a second dielectric barrier layer, and a medical film layer stacked sequentially from top to bottom. The medical film layer is suitable for contacting a wound. The electrode layer includes a positive electrode, a negative electrode, and an auxiliary electrode. The positive electrode and the negative electrode are coplanarly disposed on a substrate. The auxiliary electrode is connected to the negative electrode to change the electric field distribution. The power supply module is electrically connected to the positive electrode and the negative electrode. The control module is connected to the power supply module to control the operation of the power supply module.

[0006] The plasma therapy device provided by the present invention further includes a power regulation module, which is electrically connected to the power supply module and the control module respectively. The power regulation module is used to receive control commands from the control module and control the output power of the power supply module.

[0007] According to the plasma therapy device provided by the present invention, the flexible plasma patch further includes an adapter component, which is integrated with the electrode wires of the positive electrode and the negative electrode and electrically connected to the power module.

[0008] According to the plasma therapy device provided by the present invention, the flexible plasma patch further includes a heating element located between the second dielectric barrier layer and the medical film layer, and the heating element is electrically connected to the power module.

[0009] According to the plasma therapy device provided by the present invention, the flexible plasma patch further includes a monitoring module disposed between the second dielectric barrier layer and the medical film layer, for monitoring the temperature and humidity of the wound surface, and the monitoring module is electrically connected to the control module.

[0010] According to the plasma therapy device provided by the present invention, a first through hole is provided on the first dielectric barrier layer at intervals, and the first through hole is provided corresponding to the gap of the electrode layer;

[0011] The second dielectric barrier layer is provided with a second through hole at intervals, and the position of the second through hole corresponds to the position of the first through hole;

[0012] The medical film layer is provided with a third through hole, the position of which corresponds to the position of the second through hole.

[0013] According to the plasma therapy device provided by the present invention, along the thickness direction of the flexible plasma patch, the apertures of the first through hole, the second through hole, and the third through hole gradually increase from top to bottom.

[0014] According to the plasma therapy device provided by the present invention, the diameter of the first through hole is smaller than the diameter of the second through hole, and the diameter of the second through hole is smaller than the diameter of the third through hole.

[0015] A second aspect of the present invention provides a control method based on the aforementioned plasma therapy device, comprising the following steps:

[0016] When the wound meets the treatment conditions, the control power module is turned on to supply power to the positive and negative electrodes, so as to form plasma between the positive and negative electrodes for wound treatment;

[0017] If the operating time of the power module meets the preset operating time, the power module will be shut down.

[0018] The control method for the plasma therapy device provided by the present invention further includes the following steps:

[0019] Obtain temperature and humidity information of the wound;

[0020] When the humidity information of the wound is determined to be greater than the preset humidity information and the temperature information is less than the preset temperature information, the heating element is controlled to operate; until the humidity information of the wound meets the preset humidity information, the heating element is controlled to stop operating.

[0021] When the humidity of the wound is greater than the preset humidity and the temperature is greater than or equal to the preset temperature, the heating element is stopped, and the wound is quickly dried by natural airflow through the through-hole.

[0022] The plasma therapy device provided by this invention includes a flexible plasma patch, a power supply module, and a control module. The flexible plasma patch has a medical film layer disposed beneath a structure consisting of a first dielectric barrier layer, an electrode layer, and a second dielectric barrier layer stacked sequentially from top to bottom. This medical film layer serves as the substrate for plasma generation. The film layer must be compatible with the plasma generation mechanism to ensure that the plasma can penetrate to the treatment site safely, exerting functions such as sterilization, healing promotion, and pain relief. Simultaneously, the electrode layer includes a positive electrode, a negative electrode, and an auxiliary electrode. Both the positive and negative electrodes are suitable for connecting to the power supply module for discharge. The auxiliary electrode is connected to the negative electrode to change the electric field distribution, guiding the formation path and diffusion range of the plasma. This allows for better control of the spatial distribution of the electric field, enabling precise management of the plasma generation area, avoiding hot spots or dead zones, ensuring uniform energy deposition, and improving the safety of the flexible plasma patch.

[0023] The control method of the plasma therapy device provided by the present invention generates low-temperature plasma to achieve the effects of wound sterilization and promoting healing, resulting in better treatment effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the flexible plasma patch provided in an embodiment of the present invention.

[0026] Figure 2 This is an exploded view of the structure of the flexible plasma patch provided in an embodiment of the present invention.

[0027] Figure 3 This is an isometric sectional view of the flexible plasma patch provided in the embodiment of the invention.

[0028] Figure 4yes Figure 3 A partial schematic diagram of the flexible plasma patch provided in the embodiment of the invention is shown.

[0029] Figure 5 This is a partial structural exploded view of the flexible plasma patch provided in the embodiment of the invention.

[0030] Figure 6 This is a schematic diagram of the electrode layer in the flexible plasma patch provided in the embodiment of the invention.

[0031] Figure 7 This is a top view of the flexible plasma patch provided in the embodiment of the invention.

[0032] Figure 8 This is a control block diagram of the plasma therapy device provided in an embodiment of the present invention.

[0033] Figure 9 This is a flowchart of the control method for the plasma therapy device provided in the embodiments of the present invention.

[0034] Figure label:

[0035] 10. First dielectric barrier layer; 11. First through hole; 20. Electrode layer; 21. Positive electrode; 22. Negative electrode; 23. Auxiliary electrode; 30. Second dielectric barrier layer; 31. Second through hole; 40. Medical film layer; 41. Third through hole; 50. Adapter component; 60. Control module; 70. Power supply module; 80. Monitoring module; 90. Power adjustment module; 100. Heating element. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0037] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0038] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] See Figures 1 to 8 This invention provides a plasma therapy device, which includes a flexible plasma patch, a control module 60, and a power module 70.

[0041] The flexible plasma patch includes a first dielectric barrier layer 10, an electrode layer 20, a second dielectric barrier layer 30, and a medical film layer 40 stacked sequentially from top to bottom. The medical film layer 40 is suitable for contacting the wound surface. The electrode layer 20 includes a positive electrode 21, a negative electrode 22, and an auxiliary electrode 23. The positive electrode 21 and the negative electrode 22 are coplanarly disposed on the substrate. The auxiliary electrode 23 is connected to the negative electrode 22 to change the electric field distribution.

[0042] The medical film layer 40 is suitable for contact with wounds and includes, but is not limited to, polyurethane, polyethylene, and polyvinyl chloride. An adhesive layer can be provided on the medical film layer 40 to fix the flexible plasma patch entirely near the patient's wound, ensuring stable and uniform plasma release and preventing easy detachment. It maintains good adhesion even during movement or sleep, reducing secondary damage caused by repeated tearing. The medical film layer 40 can also serve as a substrate for plasma generation. The film layer must be compatible with the plasma generation mechanism to ensure that the plasma can safely penetrate to the treatment site to exert its bactericidal, healing-promoting, and analgesic functions.

[0043] The first dielectric barrier layer 10 and the second dielectric barrier layer 30 serve as flexible substrates, providing support and a flat working interface suitable for close contact with the skin or other treatment sites. Both the first dielectric barrier layer 10 and the second dielectric barrier layer 30 are made of the same insulating dielectric material, including but not limited to silicone rubber, silicone, gel, polyimide, and polydimethylsiloxane. The first dielectric barrier layer 10 and the second dielectric barrier layer 30 can also be made of polymer films, such as PET (polyethylene terephthalate), PU (polyurethane), and PVC (polyvinyl chloride), to ensure the patch's flexibility and comfort.

[0044] The power module 70 is electrically connected to the positive electrode 21 and the negative electrode 22 respectively, and is used to provide the necessary high-frequency or pulse voltage to the electrodes to generate the electric field required for plasma discharge.

[0045] The control module 60 is connected to the power supply module 70 and is used to control the operation of the power supply module 70. The control module 60 includes a microcontroller, a signal processor, a display, etc., and is responsible for monitoring and adjusting various parameters to ensure the safety and effectiveness of the treatment.

[0046] It is understood that the plasma therapy device provided in this embodiment of the invention includes a flexible plasma patch, a power module, and a control module. The flexible plasma patch has a medical film layer 40 disposed beneath a structure consisting of a first dielectric barrier layer 10, an electrode layer 20, and a second dielectric barrier layer 30 stacked sequentially from top to bottom. Meanwhile, the electrode layer 20 includes a positive electrode 21, a negative electrode 22, and an auxiliary electrode 23. The positive electrode 21 is disposed on one side of the first dielectric barrier layer 10, the negative electrode 22 is disposed on one side of the second dielectric barrier layer 30, and the auxiliary electrode 23 is connected to the negative electrode. This allows for changes in the electric field distribution, guiding the formation path and diffusion range of the plasma. This enables better control of the spatial distribution of the electric field, achieving refined management of the plasma generation area, avoiding hot spots or dead zones, ensuring uniform energy deposition, and improving the safety of the flexible plasma patch.

[0047] By adding auxiliary electrodes, flexible plasma patches can generate plasma fields through three-electrode plasma. Compared with plasma fields generated by two-electrode plasma, this allows for better control of the spatial distribution of the electric field, enabling refined management of the plasma generation area, avoiding hot spots or dead zones, and ensuring uniform energy deposition. The composite electric field formed by the auxiliary electrodes helps to increase electron density and mean free path, thereby increasing the efficiency of the excitation and ionization processes and generating more active species (ROS, RNS, etc.). The three-electrode architecture helps to stabilize the plasma discharge mode, reduce the risk of spark discharge, extend the equipment operating cycle, and improve overall safety. Three-electrode systems often achieve lower power consumption, making them more economical for large-scale production or continuous operation.

[0048] In some embodiments of the invention, the plasma therapy device further includes a power regulation module 90, which is electrically connected to the power supply module 70 and the control module 60 respectively. The power regulation module 90 is used to receive control commands from the control module 60 and control the output power of the power supply module 70.

[0049] In some embodiments of the invention, the flexible plasma patch further includes an adapter 50, which is integrated with the electrode lines of the electrode layer 20, and the adapter 50 is adapted to connect to a power module.

[0050] The adapter component 50 facilitates the connection between the flexible plasma patch and the power module. The adapter component 50 can be equipped with standardized plugs and sockets, allowing the flexible plasma patch to be quickly connected to the power module, simplifying maintenance and connection.

[0051] In some embodiments of the present invention, a heating element 100 may also be integrated on the flexible plasma patch, and the heating element 100 and the power module 70 are electrically connected.

[0052] The heating element 100 can be a resistance heating wire, a graphene heating sheet, or a conductive polymer heating film. When current passes through the resistance wire, electrical energy is converted into heat energy, causing the resistance wire to heat up and then transferring the heat to the surrounding plasma. When current passes through the graphene heating sheet, electrons in the graphene lattice accelerate under the influence of the electric field, colliding with lattice atoms and converting electrical energy into heat energy. When a voltage is applied to the conductive polymer heating film, charge carriers inside the conductive polymer move directionally under the influence of the electric field, colliding with the polymer molecular chains and generating heat.

[0053] Although flexible plasma patches mainly generate plasma by exciting gas molecules through the electric field between electrodes, adding an appropriate heating mechanism can optimize the plasma generation conditions and improve its therapeutic effect.

[0054] In some embodiments of the present invention, the flexible plasma patch further includes a monitoring module disposed between the second dielectric barrier layer 30 and the medical film layer 40, for monitoring the temperature and humidity of the wound surface, and the monitoring module is electrically connected to the control module 60.

[0055] The monitoring module 80 can be a structure such as a temperature and humidity sensor. The temperature and humidity sensor is used to monitor the temperature and humidity information of the wound and feeds back the collected temperature and humidity information to the control module 60. The control module 60 controls the heating element 100 to work.

[0056] In some embodiments of the invention, the first dielectric barrier layer 10 is provided with first through holes 11 at intervals, the first through holes 11 being disposed corresponding to the gaps in the electrode layer 20, and gaps being disposed between the electrodes in the electrode layer 20; the second dielectric barrier layer 30 is provided with second through holes 31 at intervals, the positions of the second through holes 31 corresponding to the positions of the first through holes 11, which is equivalent to the flexible plasma patch having through holes consisting of the first through holes 11, gaps, and second through holes 31. The medical film layer 40 is provided with a third through hole 41, the position of the third through hole 41 corresponding to the position of the second through hole 31. This is equivalent to the flexible plasma patch consisting of the first dielectric barrier layer 10, electrode layer 20, second dielectric barrier layer 30, and medical film layer 40 stacked sequentially from top to bottom being provided with through holes, which facilitates improved treatment efficiency and promotes wound healing.

[0057] Understandably, the flexible plasma patch, composed of the first dielectric barrier layer 10, electrode layer 20, second dielectric barrier layer 30, and medical film layer 40 stacked sequentially from top to bottom, has through holes. On the one hand, it allows outside air to enter the wound through the through holes, increasing the amount of active particles generated and effectively improving treatment efficiency; on the other hand, it allows ozone generated by the discharge of electrode layer 20 to flow out through the through holes, thereby reducing ozone accumulation, avoiding tissue oxidative stress caused by ozone accumulation, leading to cell membrane lipid peroxidation, and promoting the wound healing process.

[0058] Because ozone accumulates during wound treatment, high concentrations of ozone are toxic to living cells. Prolonged concentration in a specific area can easily cause oxidative stress in tissues, leading to lipid peroxidation of cell membranes, which in turn triggers an inflammatory response and delays wound healing. Furthermore, large amounts of ozone can inhibit leukocyte function, interfere with normal immune responses, weaken the body's ability to resist infection, and hinder wound defense and repair. The flexible plasma patch provided in this embodiment, by setting corresponding first through-holes 11 and second through-holes 31, provides an escape channel for ozone, reducing ozone accumulation at the wound site, thereby promoting wound healing and improving treatment efficiency.

[0059] In some embodiments of the invention, along the thickness direction of the flexible plasma patch, the apertures of the first through hole 11, the second through hole 31, and the third through hole 41 gradually increase from top to bottom, that is, along the thickness direction of the flexible plasma patch, the apertures of the first through hole 11, the second through hole 31, and the third through hole 41 gradually decrease from bottom to top.

[0060] This means that the first through hole 11, the second through hole 31, and the third through hole 41 can all be tapered or trapezoidal holes, and the diameter of the first through hole 11 gradually increases. The top dimension of the second through hole 31 is the same as the bottom dimension of the first through hole 11, and the diameter of the second through hole 31 gradually increases. The top dimension of the third through hole 41 is the same as the bottom dimension of the second through hole 31, and the diameter of the third through hole 41 gradually increases.

[0061] That is, the bottom diameter of the third through hole 41 is the largest, and the top diameter of the first through hole 11 is the smallest. This setting is equivalent to the through holes closer to the wound having larger diameters, while the through holes farther from the wound having smaller diameters, thus preventing water vapor or other liquids from entering the flexible plasma patch through the through holes.

[0062] It should be noted that the entire through-hole design of the flexible plasma patch can be precisely controlled in terms of the diameter and arrangement of the through-holes according to the specific wound condition. By utilizing the principle of capillary action, the pore size is small enough to allow liquid droplets to enter, but allows air and ozone to pass through freely.

[0063] Alternatively, a hydrophobic layer can be coated around each third through-hole 41 or on the entire surface of the medical film layer 40. Even when exposed to moisture, the medical film layer 40 is not easily wetted, preventing moisture from penetrating the flexible plasma patch. Alternatively, a moisture-absorbing material layer can be placed on the lower layer of the medical film layer 40 at the location of the third through-hole 41. This moisture-absorbing material layer quickly absorbs moisture near the electrode layer 20. Even if a small amount of liquid accidentally seeps in, it will be absorbed promptly, protecting the circuitry of the electrode layer 20 from damage.

[0064] In some embodiments of the invention, the diameter of the first through hole 11 is smaller than the diameter of the second through hole 31, and the diameter of the second through hole 31 is smaller than the diameter of the third through hole 41.

[0065] Essentially, the first through-hole 11, the second through-hole 31, and the third through-hole 41 are all cylindrical straight holes. The through-holes formed by the first through-hole 11, the second through-hole 31, and the third through-hole 41 penetrating the flexible plasma patch are stepped holes. The stepped holes can accelerate the airflow in the vertical direction, which helps to replenish the working gas. At the same time, the stepped holes increase the surface area for air interaction, promote smooth airflow, and can effectively improve treatment efficiency.

[0066] In some embodiments of the invention, at least two first through holes 11 form a first hole group; on the same projection plane, the layout area of ​​each first hole group covers the opening area of ​​the second through hole 31; the diameter of the third through hole 41 is greater than or equal to the diameter of the second through hole 31.

[0067] Since the first through hole 11 is connected to the outside air, the diameter of the first through hole 11 determines whether external contamination can enter the wound. Therefore, by opening at least two first through holes 11 of different shapes in the original position of one first through hole 11, and by reducing the size of a single first through hole 11 and increasing the number of first through holes 11 in the same area, the size of the first through hole 11 can be effectively reduced, thereby further isolating external contamination and preventing microorganisms, dust and other harmful substances from invading the wound.

[0068] In this embodiment, the diameter of the third through hole 41 is greater than or equal to the diameter of the second through hole 31, while the diameter of the first through hole 11 is always smaller than the diameter of the second through hole 31. This ensures that the through holes of the flexible plasma patch, which consist of the first through hole 11, the second through hole 31, and the third through hole 41, are also larger near the wound and smaller at the end that is far from the wound and connected to the outside air. This prevents external contamination from entering the interior of the flexible plasma patch through the first through hole 11.

[0069] In some embodiments of the invention, at least three first through holes 11 form a first hole group, and at least two second through holes 31 form a second hole group. The layout area of ​​each first hole group corresponds to the layout area of ​​each second hole group, and the number of through holes in each first hole group is greater than the number of through holes in the corresponding second hole group. On the same projection plane, the layout area of ​​each second hole group covers the opening area of ​​the third through hole 41.

[0070] In this embodiment, by creating at least three first through holes 11 of different shapes at the location of the original single first through hole 11, the size of a single first through hole 11 is reduced, while the number of first through holes 11 in the same area is increased. Similarly, by creating at least two second through holes 31 of different shapes at the location of the original single second through hole 31, the size of a single second through hole 31 is reduced, while the number of second through holes 31 in the same area is increased. Furthermore, by always maintaining a size larger than the third through hole 41 and a size larger than the second through hole 31, the capillary action principle can be effectively utilized. This ensures that the pore size is small enough to prevent liquid droplets from entering, while allowing air and ozone to pass freely. This ensures the flexible plasma patch has a good therapeutic effect while effectively preventing contaminants from sequentially entering and contacting the wound through the various through holes.

[0071] In some embodiments of the invention, the pore wall of each third through hole 41 or the pore wall of the second through hole 31 may also be provided with an ozone catalyst to rapidly decompose excess ozone into oxygen. The hydroxyl radicals (·OH) formed by ozone under the action of the ozone catalyst have a higher reaction rate and stronger oxidizing power with organic matter, oxidizing and decomposing large organic molecules into small molecules, making them easier to degrade, thereby improving treatment efficiency.

[0072] When the flexible plasma patch does not have a medical film layer 40, an ozone catalyst is placed on the wall of the second through hole 31. When the flexible plasma patch has a medical film layer 40, an ozone catalyst is placed on the wall of the third through hole 41 to rapidly decompose excess ozone.

[0073] It should be noted that the shapes of the first through hole 11, the second through hole 31 and the third through hole 41 include, but are not limited to, circles, ovals, squares, strips, polygons, and irregular shapes, such as pentagons or hearts.

[0074] It should also be noted that the flexible plasma patch provided in the embodiments of the invention can use computer simulation software to predict the distribution pattern of each through hole under different hole diameters and spacings according to the wound area, depth, shape, etc., so as to adapt to different wound conditions.

[0075] In some embodiments of the present invention, the shape of the discharge electrode is not limited to comb-shaped, mesh-shaped, spiral-shaped, and honeycomb-shaped.

[0076] When a high-voltage AC or DC voltage is applied between the comb-shaped electrode (positive electrode) and ground (or negative electrode), a strong electric field is generated between the electrodes. When the electric field strength exceeds the breakdown electric field of gas molecules, the molecules in the air at the wound surface are strongly ionized, decomposing into charged particles (electrons, positive ions, and free radicals). These charged particles accelerate under the influence of the electric field, colliding with other neutral molecules and further generating more charged particles, forming an avalanche-like chain reaction. As the electron density increases, the local current increases sharply, forming a discharge channel. The high temperature and high-energy electrons within the discharge channel cause the gas molecules to be completely ionized, forming a plasma composed of ions, electrons, and excited-state molecules. The plasma propagates outward from the discharge area through electrodynamics and thermal diffusion, effectively sterilizing the wound and achieving the therapeutic purpose.

[0077] The edges or tips of the comb-tooth electrodes, due to their small radius of curvature, exhibit a significantly enhanced electric field strength, leading to electric field concentration. Essentially, the sharp tips of the comb-tooth electrodes can locally amplify the electric field, reducing the voltage required for discharge and enabling plasma discharge with lower energy input, thereby minimizing thermal damage to surrounding tissues. Furthermore, the multi-tooth arrangement can form a dense discharge array, achieving uniform coverage over a larger area, making it suitable for large-area wound treatment or surface processing applications.

[0078] When the power module provides high voltage between the spiral positive and negative electrodes, it generates an electromagnetic field in the spiral direction. Under the combined action of the strong magnetic and electric fields, gas molecules are ionized, and electrons are stripped from atoms to form electrons and ions. The structure of the spiral electrodes guides the electrons and ions to move along the spiral path. The accumulation of charge on the spiral path triggers discharge. During the discharge process, gas molecules are transformed into a plasma state due to ionization and heating, forming a stable plasma cloud. The plasma cloud is affected by the spiral magnetic field and propagates along the spiral axis, exhibiting a spiral or vortex-like motion.

[0079] Since the plasma cloud generated by the spiral electrode discharge can be output in a specific direction, a magnetic component can be added to the treatment end 12. The magnetic component can generate a magnetic field, and the output direction of the plasma can be further controlled by the additional magnetic field, thereby providing targeted treatment to the wound that needs to be treated.

[0080] Mesh electrodes typically consist of a series of interwoven metal wires or strips, which alternately serve as positive and negative electrodes, forming multiple intersections and gaps. When an external power module applies a potential to the positive and negative electrodes respectively, a strong electric field is established in the gaps of the mesh. Under the influence of this electric field, electrons in the gas molecules are pulled apart and begin to separate from atoms or molecules, forming free electrons. These free electrons are accelerated under the drive of the electric field, colliding with more gas molecules and creating new electron-ion pairs. As the electron density continues to increase, the local electric field becomes extremely strong, sufficient to completely break down the gas medium and form a discharge. The discharge path spreads along the gaps of the mesh, forming numerous dispersed but interconnected small discharge channels, increasing the effective area of ​​plasma coverage. In the discharge channels, a large number of electrons, positive ions, and excited-state molecules gather, forming a dense plasma cloud. The generated plasma diffuses out from the discharge channels, achieving the sterilization and disinfection function of plasma.

[0081] A honeycomb electrode typically consists of a central electrode (usually a positive electrode) and surrounding annular or hexagonal negative electrodes, with the gaps filled with a gaseous medium. When a high-voltage power supply is applied between the central and peripheral electrodes, a non-uniform electric field is created between them. Due to the unique arrangement of the electrodes, the electric field is highly concentrated within each cell of the honeycomb, especially near the central electrode, forming a highly concentrated electric field gradient. The central electrode attracts free electrons and other charged particles from the surrounding space, while the negative electrodes repel these charged particles, causing charge to accumulate around the central electrode. When the electric field strength is sufficiently high, the gaseous medium is ionized, forming charge carriers (electrons and positive ions). The broken-down medium forms a discharge channel, where high-energy particles continue to interact with other molecules, forming a large number of ions, electrons, and reactive species—plasma. This plasma is not confined to the discharge channel but diffuses into the wound, sterilizing and disinfecting it.

[0082] Among the various electrodes mentioned above, the comb-shaped electrode, with its finely serrated edges that can focus the electric field, is suitable for treating localized lesions with minimal damage to surrounding normal tissue, making it ideal for treating deep skin infections and effectively killing bacteria without harming healthy tissue. The honeycomb electrode provides a more uniform discharge distribution and a wider plasma coverage area, making it suitable for treating larger wounds. The mesh electrode, with its strong penetrability, is suitable for treating deep tissues or complex morphological sites, facilitating treatments requiring penetration into deep tissues and enabling deep purification and repair. The spiral electrode, utilizing its spiral discharge characteristics and directional plasma flow, can create targeted therapeutic effects in deep tissues; its ability to deliver plasma in a directional manner enhances treatment precision and safety, making it suitable for targeted therapy.

[0083] This invention also provides a control method for a plasma therapy device, which includes the following steps S100 and S200.

[0084] Step S100: When the wound meets the treatment conditions, the control power module 70 is turned on to supply power to the positive electrode 21 and the negative electrode 22, so as to form plasma between the positive electrode 21 and the negative electrode 22 for wound treatment.

[0085] Understandably, a multi-dimensional wound assessment is necessary before determining if the wound meets treatment criteria. In addition to routine wound size and depth measurements, precise detection of infection status is required. If infection is detected, appropriate pre-treatment with antibiotics, such as topical application of antibiotic ointment or debridement, is necessary to ensure the effectiveness and safety of subsequent plasma therapy. After confirming the wound meets treatment criteria, meticulous wound cleaning is performed. The wound is rinsed with saline solution to remove surface dirt, necrotic tissue, and secretions.

[0086] Step S200: Determine that the running time of the power module 70 meets the preset running time, and control the power module 70 to shut down.

[0087] Understandably, the preset running time may vary depending on the type of treatment and wound condition. For example, the preset running time may be shorter for smaller wounds, while it may be longer for larger or deeper wounds. A timer or counter is built into the power module 70 or control module 60 to accurately record the running time of the power module.

[0088] When the operating time of power module 70 meets the preset operating time, the system should automatically trigger the shutdown mechanism to stop supplying power to the positive electrode 21 and the negative electrode 22. For example, a timer interrupt can be set in the controller; when the timer reaches the preset time, the shutdown operation is performed. In addition to the automatic shutdown mechanism, a manual shutdown function should also be provided so that the operator can manually shut down power module 70 in case of emergency or after treatment. The manual shutdown function should be easy to operate and reliably stop the operation of power module 70 at any time.

[0089] See Figure 9 The control method for the plasma therapy device provided in this embodiment of the invention further includes steps S300, S400 and S500.

[0090] Step S300: Obtain temperature and humidity information of the wound.

[0091] Understandably, a temperature and humidity sensor can be integrated into the flexible plasma patch, and the sensor is electrically connected to the control module 60. When the flexible plasma patch is in direct contact with the wound, the temperature and humidity sensor collects the temperature and humidity information of the wound and feeds the collected information back to the control module 60.

[0092] Step S400: When the humidity information of the wound is greater than the preset humidity information and the temperature information is less than the preset temperature information, control the heating element 100 to run; until the humidity information of the wound meets the preset humidity information, control the heating element 100 to stop running.

[0093] Understandably, when the wound surface is moist and the temperature is not high, the heating element 100 can be controlled by the control module 60 to work, thereby quickly drying the wound surface and facilitating subsequent treatment.

[0094] Step S500: When the humidity information of the wound is determined to be greater than the preset humidity information and the temperature information is greater than or equal to the preset temperature information, the heating element 100 is controlled to stop operating. At this time, the wound is quickly dried by the natural airflow through the through hole.

[0095] Understandably, when the wound surface is moist and hot, the natural airflow through the opening can quickly dry the wound surface without the need for a heating element, thus avoiding burns to the wound tissue.

[0096] The method provided by this invention generates low-temperature plasma to achieve sterilization and promote healing of wounds, resulting in better therapeutic effects.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plasma therapy device, characterized in that, include: A flexible plasma patch includes a first dielectric barrier layer, an electrode layer, a second dielectric barrier layer, and a medical film layer stacked sequentially from top to bottom. The medical film layer is suitable for contacting a wound. The electrode layer includes a positive electrode, a negative electrode, and an auxiliary electrode. The positive electrode and the negative electrode are coplanarly disposed on a substrate. The auxiliary electrode is connected to the negative electrode to change the electric field distribution. The first dielectric barrier layer is provided with a first through hole at intervals, and the first through hole is disposed corresponding to the gap of the electrode layer; the second dielectric barrier layer is provided with a second through hole at intervals, and the position of the second through hole corresponds to the position of the first through hole; the medical film layer is provided with a third through hole, and the position of the third through hole corresponds to the position of the second through hole; In this configuration, at least three first through holes form a first hole group, and at least two second through holes form a second hole group. The layout area of ​​each first hole group corresponds to the layout area of ​​each second hole group, and the number of through holes in each first hole group is greater than the number of through holes in the corresponding second hole group. On the same projection plane, the layout area of ​​each second hole group covers the opening area of ​​the third through hole. Along the thickness direction of the flexible plasma patch, the apertures of the first through holes, second through holes, and third through holes gradually increase from top to bottom. A power module is electrically connected to the positive electrode and the negative electrode; A control module, connected to the power module, is used to control the operation of the power module.

2. The plasma therapy device according to claim 1, characterized in that, It also includes a power regulation module, which is electrically connected to both the power supply module and the control module. The power regulation module is used to receive control commands from the control module and control the power output of the power supply module.

3. The plasma therapy device according to claim 1, characterized in that, The flexible plasma patch also includes an adapter component, which is integrated with the electrode lines of the positive electrode and the negative electrode and electrically connected to the power module.

4. The plasma therapy device according to claim 1, characterized in that, The flexible plasma patch also includes a heating element located between the second dielectric barrier layer and the medical film layer, and the heating element is electrically connected to the power module.

5. The plasma therapy device according to claim 1, characterized in that, The flexible plasma patch also includes a monitoring module, which is located between the second dielectric barrier layer and the medical film layer, and is used to monitor the temperature and humidity of the wound. The monitoring module is electrically connected to the control module.

6. A control method for the plasma therapy device according to any one of claims 1 to 5, characterized in that, Includes the following steps: When the wound meets the treatment conditions, the control power module is turned on to supply power to the positive and negative electrodes, so as to form plasma between the positive and negative electrodes for wound treatment; If the operating time of the power module meets the preset operating time, the power module will be shut down.

7. The control method for the plasma therapy device according to claim 6, characterized in that, It also includes the following steps: Obtain temperature and humidity information of the wound; When the humidity information of the wound is determined to be greater than the preset humidity information and the temperature information is less than the preset temperature information, the heating element is controlled to operate; until the humidity information of the wound meets the preset humidity information, the heating element is controlled to stop operating. When the humidity of the wound is greater than the preset humidity and the temperature is greater than or equal to the preset temperature, the heating element is stopped, and the wound is quickly dried by natural airflow through the through-hole.

Images