Plasma generating device for wound surface treatment

Abstract

The invention relates to the field of medical equipment, in particular to a plasma generating device for wound surface treatment, which comprises a host, a treatment patch, an SDBD electrode and a connecting cable, and is characterized in that the host comprises a high-frequency alternating current power supply and a plurality of first wiring terminals, the high-frequency alternating current power supply forms a plurality of output ends correspondingly connected with the plurality of first wiring terminals, and the SDBD electrode is connected with the high-frequency alternating current power supply; the treatment patch is provided with a second wiring terminal which is correspondingly connected with the first wiring terminal through a connecting cable, and is provided with a silica gel insulation pad. The SDBD electrode is detachably fixed to the treatment patch, and the wiring end of the SDBD electrode is connected with the second wiring terminal. Each second wiring terminal is covered with a silica gel insulation pad and used for electrical insulation and protection, and a user is prevented from touching the electrode high-voltage side by mistake. By means of the detachable SDBD electrode and the length-adjustable connecting cable, the device can be flexibly matched with wounds of different sizes and shapes, synchronous treatment of the multiple wounds is achieved, the treatment efficiency is improved, and the characteristics that the wounds are small, many, deep and far after minimally invasive surgery are effectively met.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a plasma generating device for wound treatment. Background Technology

[0002] Minimally invasive surgery produces wounds characterized by "numerous, small, deep, and distant" wounds: Numerous wounds require multiple operating and observation ports, creating a multi-point intervention pattern; small wound area, with individual incisions typically only a few square centimeters, resulting in significantly less overall skin damage compared to traditional open surgery; unique wound depth, often tubular or funnel-shaped, with a depth greater than the surface width, extending into deep tissues, organs, or cavities; and dispersed wound distribution, with relatively large distances between surgical points, distributed across different anatomical planes to achieve three-dimensional manipulation. These characteristics collectively constitute the wound features of minimally invasive surgery that distinguish it from traditional open surgery, offering patients significant advantages such as less trauma, faster recovery, and fewer complications, while also posing unique requirements for wound management.

[0003] Existing products for wound treatment mainly include skin anastomosis dressings, closed negative pressure drainage dressings, and plasma therapy dressings. Among them, skin anastomosis dressings, due to their adhesive tape only adhering to the skin surface, have limited treatment depth, and their density is generally low, increasing the risk of wound infection. They also lack exudate absorption capacity, leading to easy accumulation of exudate after surgery and thus causing wound infection. Closed negative pressure drainage dressings have the problem of single dressing units, making it impossible to treat multiple wounds simultaneously. The dressing size is fixed and does not match minimally invasive wounds, resulting in long-term damage to the skin around the wound under negative pressure. They act on the skin surface and superficial tissues, but cannot treat the deeper tissues caused by abdominal surgical punctures. In contrast, plasma therapy dressings use a flexible surface dielectric barrier discharge (SDBD) method, applying an alternating voltage to generate low-temperature plasma containing abundant active oxygen and nitrogen substances. This plasma encapsulates the postoperative wound area, killing bacteria and promoting wound healing in the wound surface and deeper tissues, making it more suitable for minimally invasive surgical wound treatment.

[0004] However, existing plasma therapy wound dressings are limited in size, shape, and number of treatment pads, resulting in low efficiency in treating micro-wounds and a limited number of wounds that can be treated simultaneously. Secondly, if the number of electrodes is increased, unused electrode pads may cause electrical safety issues if the user accidentally touches the high-voltage side. Finally, for cases where wounds are widely distributed, the electrical safety of existing plasma therapy wound dressings needs further consideration. Summary of the Invention

[0005] The present invention provides a plasma generating device for wound treatment, which solves the above-mentioned defects of existing plasma therapy wound dressings in the treatment of minimally invasive surgical wounds.

[0006] This invention provides a plasma generator for wound treatment, comprising a main unit, multiple treatment patches, a surface dielectric barrier discharge electrode, and a connecting cable. The main unit includes a high-frequency AC power supply and multiple first terminals. The high-frequency AC power supply has multiple output terminals, each corresponding to an input terminal of one of the first terminals. Each treatment patch has a second terminal, the input of which is correspondingly connected to an output terminal of one of the first terminals. A silicone insulating pad is disposed on each second terminal. The surface dielectric barrier discharge electrode is detachably fixed to the treatment patch, and its terminal is connected to the second terminal. The connecting cable connects the first and second terminals and is an adjustable-length cable.

[0007] According to the present invention, a plasma generating device for wound treatment is provided, wherein the treatment patch is provided with Velcro, and the back of the surface dielectric barrier discharge electrode is fixed to the treatment patch by the Velcro; and / or, the surface dielectric barrier discharge electrode is fixed to the treatment patch by adhesive.

[0008] According to the present invention, a plasma generating device for wound treatment is provided, wherein the second terminal is a coaxial snap-on interface terminal, the second terminal includes a grounding ring, an insulating dielectric ring, and a high-voltage terminal, the grounding ring is connected to the grounding terminal of the high-frequency AC power supply through the connecting cable and the first terminal; the insulating dielectric ring is located inside the grounding ring; the high-voltage terminal is located inside the insulating dielectric ring, and the high-voltage terminal is connected to the power output terminal of the high-frequency AC power supply through the connecting cable and the first terminal.

[0009] According to the present invention, a plasma generating device for wound treatment is provided, wherein a silicone insulating pad covers the surface of the second terminal facing away from the treatment patch, the terminal of the surface dielectric barrier discharge electrode includes a metal pin and a metal snap, the terminal of the surface dielectric barrier discharge electrode is adapted to pass through the silicone insulating pad and form a snap connection with the second terminal, the metal snap is connected to the high voltage drive positive line of the surface dielectric barrier discharge electrode, and the metal snap is connected to the reference potential ground line of the surface dielectric barrier discharge electrode.

[0010] According to the present invention, a plasma generating device for wound treatment is provided, wherein the end of the high-voltage terminal facing away from the treatment patch has a concave structure, and a cross-shaped opening is formed on the silicone insulating pad.

[0011] The metal snap is located on the outer periphery of the metal pin to form a coaxial structure. The metal pin is adapted to pass through the cross-shaped opening to connect with the high-voltage terminal. The metal snap is adapted to pass through the cross-shaped opening to contact the grounding ring.

[0012] According to the present invention, a plasma generating device for wound treatment is provided, wherein the high-frequency AC power supply of the main unit includes a power supply unit, a high-frequency AC topology circuit, and a cascaded multi-winding step-up transformer. The high-frequency AC topology circuit is connected to the power supply unit and is a full-bridge inverter circuit. The cascaded multi-winding step-up transformer includes a primary winding and multiple secondary windings. The primary winding is connected to the output terminal of the high-frequency AC topology circuit, and the multiple secondary windings are connected one-to-one to multiple first terminals.

[0013] According to the present invention, a plasma generating device for wound treatment is provided, wherein the secondary winding includes a positive terminal and a return terminal; the positive terminal serves as the power output terminal of the high-frequency AC power supply and is connected to the terminal of the surface dielectric barrier discharge electrode in sequence through the first terminal, the connecting cable, and the second terminal; the return terminal is connected to a grounding wire and serves as the grounding terminal of the high-frequency AC power supply, and is connected to the terminal of the surface dielectric barrier discharge electrode in sequence through the first terminal, the connecting cable, and the second terminal.

[0014] According to the present invention, a plasma generating device for wound treatment is provided, wherein a measuring capacitor is connected in series between the return line terminal and the grounding wire, and a sampling circuit is connected between the return line terminal and the positive line terminal, which is adapted to acquire the voltage peak value between the return line terminal and the positive line terminal through the sampling circuit.

[0015] According to the present invention, a plasma generating device for wound treatment is provided, wherein the high-frequency AC power supply of the main unit operates in an open-loop frequency conversion control mode. During the operation of the high-frequency AC power supply, the operating frequency of the high-frequency AC topology circuit gradually changes from the minimum frequency to the maximum frequency, and then gradually changes from the maximum frequency to the minimum frequency, and repeats this cycle repeatedly, so that the power output by the high-frequency AC power supply forms a continuously changing frequency.

[0016] According to the present invention, a plasma generating device for wound treatment is provided, wherein the main unit further includes a control panel and a display screen. The control panel is used to control the switching of the high-frequency AC power supply with the plurality of first terminals respectively, so that the plurality of first terminals form working ports and non-working ports. The display screen is used to display the operating status of the plurality of first terminals.

[0017] The plasma generator for wound treatment provided by this invention generates high-frequency AC power through a handheld main unit with a built-in high-frequency AC power supply, providing energy for the entire device. The high-frequency AC power supply is connected to multiple first terminals via multiple output terminals. These first terminals are connected to second terminals on treatment patches via connecting cables. The second terminals are connected to surface dielectric barrier discharge electrodes, allowing a single main unit to drive N (N≥4) surface dielectric barrier discharge electrodes on treatment patches simultaneously for minimally invasive surgical wound treatment. The connecting cables are adjustable in length, facilitating adjustment of the treatment patch positions according to the distribution of surgical wounds. The detachable surface dielectric barrier discharge electrodes and adjustable-length connecting cables allow for flexible adaptation to wounds of different sizes and shapes, enabling simultaneous treatment of multiple wounds and improving treatment efficiency. This effectively addresses the characteristics of wounds that are "small," "numerous," "deep," and "far-reaching" after conventional minimally invasive surgery. Each treatment patch's second terminal is covered with a silicone insulating pad for electrical insulation and protection, preventing accidental contact with the high-voltage side of the electrode and potential electrical safety issues. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the plasma generator for wound treatment provided by the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the therapeutic patch provided by the present invention.

[0021] Figure 3 This is a schematic diagram of the planar structure of the second terminal block provided by the present invention.

[0022] Figure 4 This is a schematic diagram of the connection structure of the surface dielectric barrier discharge electrode terminal and the second terminal provided by the present invention.

[0023] Figure 5 This is the circuit topology diagram of the high-frequency AC power supply provided by the present invention.

[0024] Figure 6 This is a schematic diagram of the sampling circuit provided by the present invention for detecting frequency changes in the output power of a high-frequency AC power supply.

[0025] Figure 7 This is a flowchart of the sampling circuit provided by the present invention for detecting the frequency change of the output power of a high-frequency AC power supply.

[0026] Figure 8 This is the output waveform diagram of the high-frequency AC power supply provided by the present invention.

[0027] Figure 9 This is a flowchart illustrating the self-test function implemented by the control panel provided by the present invention.

[0028] Reference numerals: 1. Main unit; 11. First terminal block; 12. Control panel; 13. Display screen; 2. Treatment patch; 21. Second terminal block; 211. Grounding ring; 212. Insulating dielectric ring; 213. High voltage terminal; 22. Silicone insulating pad; 221. Cross-shaped opening; 23. Velcro; 3. Surface dielectric barrier discharge electrode; 31. Metal pin; 32. Metal snap; 4. Connecting cable. Detailed Implementation

[0029] 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.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention 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. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, 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 the present invention based on the specific circumstances.

[0032] In embodiments of the present invention, unless otherwise explicitly 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.

[0033] 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 present invention. 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.

[0034] The following is combined Figures 1 to 9 The specific structure and operation of the plasma generating device for wound treatment of the present invention are described.

[0035] One embodiment of the present invention provides a plasma generating device for wound treatment, see [link to relevant documentation]. Figure 1 As shown, the plasma generator includes a main unit 1, multiple treatment patches 2, surface dielectric barrier discharge (SDBD) electrodes 3, and connecting cables 4. The main unit 1 includes a high-frequency AC power supply and multiple first terminals 11. The high-frequency AC power supply has multiple output terminals, which are respectively connected to the input terminals of the multiple first terminals 11. Second terminals 21 are formed on the treatment patches 2, and the input terminals of the second terminals 21 are respectively connected to the output terminals of the first terminals 11. Silicone insulating pads 22 are provided on the second terminals 21. The surface dielectric barrier discharge (SDBD) electrodes 3 are detachably fixed to the treatment patches 2, and the terminals of the SDBD electrodes 3 are connected to the second terminals 21. The connecting cables 4 are used to connect the first terminals 11 and the second terminals 21, and the connecting cables 4 are adjustable in length.

[0036] It is understood that the plasma generating device for wound treatment in this embodiment generates high-frequency AC power through a built-in high-frequency AC power supply in the handheld host 1, which provides energy for the entire device. The high-frequency AC power supply is connected to multiple first terminals 11 through multiple output terminals. The first terminals 11 are connected to second terminals 21 on the treatment patch 2 through connecting cables 4. The second terminals 21 are connected to surface dielectric barrier discharge electrodes 3, forming a single host 1 that can drive N (N≥4) surface dielectric barrier discharge electrodes 3 on the treatment patches 2 to simultaneously perform minimally invasive surgical wound treatment. The connecting cables 4 are designed with adjustable length, which makes it easy to adjust the position of the treatment patches 2 according to the distribution of surgical wounds. Through the detachable surface dielectric barrier discharge electrodes 3 and the adjustable length connecting cables 4, different sizes and shapes of wounds can be flexibly adapted, realizing the simultaneous treatment of multiple wounds, improving treatment efficiency, and effectively meeting the characteristics of "small", "multiple", "deep" and "far" wounds after conventional minimally invasive surgery. Each treatment patch 2 has a silicone insulating pad 22 covering the second terminal 21 for electrical insulation and protection, preventing users from accidentally touching the high-voltage side of the electrode and causing electrical safety problems.

[0037] It should be understood that the plasma generating device for wound treatment in this embodiment uses a main unit 1 to drive multiple surface dielectric barrier discharge electrodes 3 to achieve simultaneous treatment of multiple wounds. It can not only effectively treat the characteristics of wounds after minimally invasive surgery, such as "small", "multiple", "deep" and "distant", but is also suitable for simultaneous treatment of wounds in multiple locations (burns / scalds, etc.). By simultaneously attaching multiple treatment patches 2 to wounds in different locations, and driving the surface dielectric barrier discharge electrodes 3 on the multiple treatment patches 2 to discharge synchronously through the main unit 1, simultaneous treatment of wounds in multiple locations can be achieved.

[0038] In some embodiments of the plasma generating apparatus for wound treatment of the present invention, see [link to relevant documentation]. Figure 2 As shown, the treatment patch 2 is provided with Velcro 23, and the back of the flexible surface dielectric barrier discharge electrode 3 is fixed to the treatment patch 2 by Velcro 23; and / or, the surface dielectric barrier discharge electrode 3 is fixed to the treatment patch 2 by adhesive.

[0039] Understandably, the Velcro 23 or adhesive on the treatment patch 2 is used to fix the surface dielectric barrier discharge electrode 3. The Velcro 23 facilitates quick removal and replacement, while the adhesive provides a more secure fixation. Each surface dielectric barrier discharge electrode 3 is fixed to the treatment patch 2 by the Velcro 23 or adhesive, ensuring a stable connection with the second terminal 21. This provides pulse power for the surface dielectric barrier discharge electrode 3 to discharge, generating discharge plasma. Simultaneously, it allows for quick removal, replacement, and position adjustment, enabling the targeted matching of appropriate surface dielectric barrier discharge electrodes 3 for different wounds.

[0040] In some embodiments of the plasma generator for wound treatment of the present invention, the second terminal 21 is a coaxial snap-on interface terminal, see [link]. Figure 3 As shown, the second terminal 21 includes a grounding ring 211, an insulating dielectric ring 212, and a high-voltage terminal 213. The grounding ring 211 is connected to the grounding terminal of the high-frequency AC power supply via a connecting cable 4 and the first terminal 11. The insulating dielectric ring 212 is located inside the grounding ring 211. The high-voltage terminal 213 is located inside the insulating dielectric ring 212 and is connected to the power output terminal of the high-frequency AC power supply via a connecting cable 4 and the first terminal 11. It can be understood that the second terminal 21 is a coaxial snap-fit ​​interface, including the grounding ring 211, the insulating dielectric ring 212, and the high-voltage terminal 213. The high-voltage terminal 213 forms the high-voltage terminal of the power output terminal of the high-frequency AC power supply. The grounding ring 211 is ultimately connected to the power ground. The insulating dielectric ring 212 uses a high dielectric constant dielectric material to prevent breakdown discharge between the grounding ring 211 and the high-voltage terminal 213, thus preventing electrical safety issues. This embodiment solves the problem of short circuits or poor contact of traditional terminals by using the coaxial snap-on terminal structure of the second terminal 21. The coaxial design of the grounding ring 211 and the high-voltage terminal 213 ensures a stable and reliable electrical connection, and the insulating dielectric ring 212 enhances safety and prevents high-voltage leakage.

[0041] Furthermore, in some embodiments of the plasma generating device for wound treatment of the present invention, a silicone insulating pad 22 covers the surface of the second terminal 21 facing away from the treatment patch 2. The terminal of the surface dielectric barrier discharge electrode 3 includes a metal pin 31 and a metal snap 32. The terminal of the surface dielectric barrier discharge electrode 3 is adapted to pass through the silicone insulating pad 22 and form a snap connection with the second terminal 21. The metal snap 32 is connected to the high-voltage drive positive line of the surface dielectric barrier discharge electrode 3 and to the reference potential ground line of the surface dielectric barrier discharge electrode 3.

[0042] Understandably, the silicone insulating pad 22 completely covers the back surface (i.e. exposed surface) of the second terminal 21, forming a physical isolation barrier. The silicone material has high insulation, flexibility and biocompatibility, which ensures electrical safety and meets the needs of human contact. The surface dielectric barrier discharge electrode 3 has two wires: a high-voltage driving positive line HV and a reference potential ground line GND. The high-voltage driving positive line HV and the reference potential ground line GND form a terminal block that is connected to the second terminal block 21. The high-voltage driving positive line HV of the surface dielectric barrier discharge electrode 3 is connected to a metal pin 31 at the terminal block. The metal pin 31 passes through a reserved opening in the silicone insulating pad 22 and is tightly connected to the high-voltage terminal 213 of the second terminal block 21 to transmit high-frequency high-voltage electrical signals. The reference potential ground line GND of the surface dielectric barrier discharge electrode 3 is connected to a metal snap 32 at the terminal block. The metal snap 32 is coaxially distributed around the metal pin 31, passes through the silicone insulating pad 22, and is connected to the grounding ring 211 to form a reference potential ground line loop. The snap-fit ​​design (such as a spring snap) ensures a stable connection and prevents the connection from falling off due to movement during treatment.

[0043] Based on the structure of the wiring terminals of the surface dielectric barrier discharge electrode 3 in this embodiment, two electrical paths are formed: the high-voltage drive positive line passes through the metal pin 31 → high-voltage terminal 213 → connecting cable 4 → high-frequency AC power output terminal of the host 1, forming an excitation circuit. The high-frequency AC power supply provides pulse power to the surface dielectric barrier discharge electrode 3, generating discharge plasma to treat the surgical wound in laparoscopic minimally invasive surgery. The reference potential ground line passes through the metal snap 32 → grounding ring 211 → connecting cable 4 → high-frequency AC power ground terminal of the host 1, forming a safety circuit.

[0044] Specifically, in some specific examples of the plasma generating device for wound treatment of the present invention, the end of the high-voltage terminal 213 facing away from the treatment patch 2 has a concave structure, and a cross-shaped opening 221 is formed on the silicone insulating pad 22. A metal snap 32 is located on the outer periphery of the metal pin 31 to form a coaxial structure. The metal pin 31 is adapted to pass through the cross-shaped opening 221 to connect with the high-voltage terminal 213, and the metal snap 32 is adapted to pass through the cross-shaped opening 221 to contact the grounding ring 211.

[0045] Combination Figure 3 and Figure 4As shown, the high-voltage terminal 213 in this example adopts a concave structure design, with a recessed area formed at the end facing away from the treatment patch 2. The concave structure provides precise alignment guidance, ensuring that the metal pin 31 can be accurately inserted into the central contact point. A cross-shaped opening 221 is provided on the silicone insulating pad 22. The cross-shaped opening 221 has a four-way radial cut design and has elastic self-recovery capability. The opening diameter is slightly smaller than the outer diameter of the metal pin 31, forming an interference fit. The cut extends to the edge of the silicone insulating pad 22, facilitating the insertion of the metal pin 31 and the metal snap 32. Specifically, the metal snap 32 forms a coaxial structure around the metal pin 31. The metal pin 31 first passes through the cross-shaped opening 221. The cross-shaped opening 221 expands elastically. The top of the metal pin 31 is inserted into the center contact point of the concave structure of the high-voltage terminal 213. The metal snap 32 moves down with the metal pin 31. After the cross-shaped opening 221 recovers its deformation, it tightly wraps around the metal pin 31. The outer edge of the metal snap 32 forms a surface contact with the grounding ring 211, thus completing the establishment of the grounding circuit.

[0046] It is important to understand that traditional planar terminals are prone to pin misalignment, leading to poor contact. In this example, the concave structure of the high-voltage terminal 213 provides physical guidance, reducing the position tolerance from ±1mm to ±0.2mm. The terminals of the surface dielectric barrier discharge electrode 3 and the second terminal 21 both adopt a coaxial structure, which can maintain stable characteristic impedance and reduce the contact resistance fluctuation range from 0.5~2Ω in the traditional design to 0.1~0.3Ω. This reduces high-frequency signal reflection, lowers signal attenuation from 1.2dB / m to 0.6dB / m, reduces electromagnetic interference radiation intensity by 40%, and improves power transmission efficiency by 15% compared to asymmetric structures. The elastic sealing design of the cross-shaped opening 221 on the silicone insulating pad 22 automatically seals when the hand is not in use on the treatment patch 2, preventing the user from accidentally touching the high-voltage terminal and causing electric shock. When the metal pin 31 deviates by more than 15°, the cross-shaped opening 221 will actively spring open to prevent incorrect connection and damage to the high-voltage terminal 213. Meanwhile, the silicone cross-shaped opening 221 maintains its sealing performance within a temperature range of -20℃ to 60℃, adapting to different disinfection temperature environments.

[0047] In some embodiments of the plasma generating apparatus for wound treatment of the present invention, see [link to relevant documentation]. Figure 5 As shown, the high-frequency AC power supply of the host 1 includes a power supply unit, a high-frequency AC topology circuit, and a cascaded multi-winding step-up transformer. The high-frequency AC topology circuit is connected to the power supply unit and is a full-bridge inverter circuit. The cascaded multi-winding step-up transformer includes a primary winding and multiple secondary windings. The primary winding is connected to the output terminal of the high-frequency AC topology circuit, and the multiple secondary windings are connected one-to-one to multiple first terminals 11.

[0048] The core components of the high-frequency AC power supply in this embodiment include a power supply unit, a high-frequency AC topology circuit, and a cascaded multi-winding step-up transformer. In some specific examples, the power supply unit uses a medical-grade switching power supply module, which can be powered by a miniaturized lithium battery. The high-frequency AC topology circuit adopts a full-bridge inverter circuit, consisting of four metal-oxide-semiconductor field-effect transistors (MOSFETs) S1~S4. It employs a phase-shift control strategy, with an adjustable operating frequency range of 20~100kHz, a dead time of 100ns for precise control, and an output square wave voltage peak-to-peak value continuously adjustable from 0-300V. The cascaded multi-winding step-up transformer employs one primary winding and multiple secondary windings. The primary winding is made of Litz wire with an inductance of 2.5mH±5% and a Q value >100@50kHz. The number of secondary windings matches the number of first terminals 11, with a turns ratio of 1:10. Each secondary winding withstands a voltage of 5kV RMS, and the interlayer insulation uses polyimide film with a dielectric withstand voltage >15kV / mm. Specifically, the power supply unit is powered by a miniaturized lithium battery. The full-bridge inverter circuit uses PWM modulation (duty cycle adjustable from 30% to 70%) to convert DC into a high-frequency square wave. The step-up transformer boosts the voltage to the required treatment level. Each secondary winding outputs independently and is connected to the surface dielectric barrier discharge electrode 3 on each treatment patch 2 through each first terminal 11.

[0049] It is understood that the host 1 in this embodiment uses a high-frequency AC power supply to provide power output, and the main power topology of the power supply is as follows: Figure 5 As shown, a full-bridge inverter circuit is adopted, and a miniaturized lithium battery power supply is used. Through a cascaded multi-winding step-up transformer, namely one low-voltage primary winding and N high-voltage secondary windings (N≥4), power output is provided to N treatment patches 2. At the same time, the reference potential points of the N secondary windings can all be connected to the common reference ground GND, so that the insulation withstand voltage between the multiple secondary windings of the transformer is only the drive output voltage. Therefore, the insulation design requirements between the windings are low, which is conducive to further reducing the size of the power supply. With the overall compact design, the miniaturization of the power supply is achieved, and the goal of efficiently driving the generation of discharge plasma for wound treatment is achieved.

[0050] In some typical application scenarios, the main unit 1 can simultaneously drive 4 to 6 treatment patches 2 through a high-frequency AC topology circuit and a cascaded multi-winding step-up transformer. Each channel can be independently controlled, supporting differentiated parameter settings. The high-frequency AC power output can penetrate to a depth of 5 to 8 cm (tissue equivalent model test). Through automatic impedance matching, it adapts to different tissue types, improving treatment efficiency by 3 times (multi-channel parallel processing), reducing energy consumption by 40%, and extending battery life to 4 hours.

[0051] In some specific examples of the plasma generating device for wound treatment of the present invention, the secondary winding includes a positive terminal and a return terminal; the positive terminal serves as the power output terminal of the high-frequency AC power supply and is connected to the terminal of the surface dielectric barrier discharge electrode 3 in sequence through the first terminal 11, the connecting cable 4, and the second terminal 21; the return terminal is connected to the grounding wire and serves as the grounding terminal of the high-frequency AC power supply, and is connected to the terminal of the surface dielectric barrier discharge electrode 3 in sequence through the first terminal 11, the connecting cable 4, and the second terminal 21. It can be understood that this example constructs a power transmission loop and a safety return loop, wherein the power transmission loop is: positive terminal of the secondary winding → first terminal 11 (main unit end) → center conductor of the connecting cable 4 → high voltage terminal 213 of the second terminal 21 → metal pin 31 of the surface dielectric barrier discharge electrode 3 → plasma generating area; the safety return loop is: metal snap 32 of the surface dielectric barrier discharge electrode 3 → grounding ring 211 of the second terminal 21 → shielding layer of the connecting cable 4 → grounding terminal of the first terminal 11 → return terminal of the secondary winding. The connecting cable 4 uses a medical-grade silicone outer sheath, is resistant to 3000V AC voltage, has an adjustable length mechanism (1~3 meters telescopic design), and has built-in tensile fiber. When the bending radius is ≥5cm, the signal attenuation is <3%. The first terminal 11 uses gold-plated spring pin contacts with a plug-in life of >5000 times. The coaxial interface of the second terminal 21 has an IPX7 waterproof rating.

[0052] Furthermore, in some specific examples, a measuring capacitor is connected in series between the return line and the ground line, and a sampling circuit is connected between the return line and the positive line, which is suitable for acquiring the voltage peak value between the return line and the positive line through the sampling circuit.

[0053] Understandably, see again Figure 5 As shown, the positive terminal J of the secondary winding is connected to the high-voltage terminal 213 of the corresponding treatment patch 2 via an interface cable, and a measuring capacitor C is connected in series between the return terminal of the secondary winding and the ground wire GND. test (C) test ≥1nF), where C test The value is much larger than the equivalent capacitance C of the small flexible surface dielectric barrier discharge electrode before discharge. SDBD This ensures that the equivalent capacitance value on the power output side after connecting the surface dielectric barrier discharge electrode 3 remains approximately C. SDBD This will not affect the actual discharge effect. A sampling circuit (not shown in the diagram) is added to the secondary side of the transformer in the high-frequency AC power supply. The sampling circuit collects the voltage signal output from the secondary side of the transformer to determine whether the corresponding surface dielectric barrier discharge electrode 3 is reliably connected. The circuit diagram is shown below. Figure 6 As shown in (b), a sampling capacitor is connected in series between the return terminal and the ground terminal of the transformer secondary side. The voltage signals under the two conditions of no connection and connection of the surface dielectric barrier discharge electrode 3 are as follows: Figure 6 As shown in (a), when the surface dielectric barrier discharge electrode 3 is not connected, the measured peak value of the secondary output voltage of the power supply is U. pk_open When the surface dielectric barrier discharge electrode 3 is connected, a capacitive load C is connected to the secondary output side of the power supply. SDBD , with C test Series connection, due to C test Its capacitance is much greater than C SDBD The equivalent capacitance C of the secondary winding of the transformer after series connection equal It is still approximately C SDBD At this time, the peak value of the secondary output voltage is U. pk_load Compared to when the surface dielectric barrier discharge electrode 3 is not connected, the peak value of the output voltage U is lower than that under no-load conditions. pk_open The flowchart of the sampling circuit for detecting the frequency change of the high-frequency AC power supply output power is as follows: Figure 7 As shown, by detecting whether the secondary voltage amplitude during the power supply output stage is greater than U... pk_load This is used to determine whether the corresponding surface dielectric barrier discharge electrode 3 is installed on the treatment patch 2, and the power supply is controlled to continue outputting power based on the detection feedback result.

[0054] In some embodiments of the plasma generator for wound treatment of the present invention, the high-frequency AC power supply of the host 1 operates in an open-loop frequency conversion control mode. During the operation of the high-frequency AC power supply, the operating frequency of the high-frequency AC topology circuit gradually changes from the minimum frequency to the maximum frequency, and then gradually changes from the maximum frequency to the minimum frequency, and repeats this cycle repeatedly, so that the power output of the high-frequency AC power supply forms a continuously changing frequency.

[0055] It is understood that the multi-output high-frequency AC power supply used in this embodiment adopts an open-loop frequency conversion control method, that is, by controlling the switching frequency of the bridge arms of the full-bridge inverter circuit from f min Gradually increase to f max Then from f max Gradually decrease to f min Then the control logic is repeated in a loop, and the output waveform is as follows. Figure 8 As shown. In some specific examples, the full-bridge inverter circuit uses phase-shifted PWM control, adaptive dead time adjustment (50~200ns), MOSFET gate drive voltage of 15V±0.5V, zero-voltage switching (ZVS) to achieve efficiency >95%, and a piecewise linear frequency conversion strategy to control the bridge arm switching frequency of the full-bridge inverter circuit from 20kHz (f min Gradually increase to 100kHz (f max ), and then from 100kHz (f max ) gradually decrease to 20kHz (f minThe transitions from 20kHz to 100kHz and from 100kHz to 20kHz are each divided into 256 steps, with a dwell time of Δt = 5ms per step (programmable adjustable) and a frequency resolution of 0.5Hz to ensure a smooth transition. The frequency of the AC power output continuously changes within the range of 20kHz to 100kHz, ensuring that different surface dielectric barrier discharge electrodes 3 loads do not discharge inconsistently due to different equivalent parameters. Each electrode can obtain a suitable peak power point from the power supply side to meet the voltage amplitude requirements for stable discharge. This allows the power supply to drive a wide range of surface dielectric barrier discharge electrodes 3 with different equivalent parameters, guaranteeing a stable and reliable therapeutic effect. In this example, the high-frequency AC power supply uses independent frequency sweeping for multiple output channels to avoid mutual interference and enables intelligent power allocation, prioritizing the needs of high-impedance electrodes.

[0056] In some embodiments of the plasma generating device for wound treatment of the present invention, see again Figure 1 As shown, the host 1 also includes a control panel 12 and a display screen 13. The control panel 12 is used to control the switching of the high-frequency AC power supply with the multiple first terminals 11, so that the multiple first terminals 11 form working ports and non-working ports. The display screen 13 is used to display the operating status of the multiple first terminals 11.

[0057] It is understood that the host 1 in this embodiment is equipped with a control panel 12 and a display screen 13. Users can independently configure the selection of working and non-working ports through the control panel 12. Multiple first terminals 11 correspond to multiple treatment patches 2 and their corresponding surface dielectric barrier discharge electrodes 3. Based on the operating mode (whether or not the surface dielectric barrier discharge electrodes 3 are working), the multiple first terminals 11 can be divided into working ports and non-working ports. (See [reference]). Figure 1 As shown, the corresponding surface dielectric barrier discharge electrode 3 can be selected by using the mode button and the plus and minus buttons on the control panel 12. The working status of the surface dielectric barrier discharge electrode 3 selected by the control panel 12 can be displayed on the display screen 13, including but not limited to displaying the operating mode (specifically indicating which surface dielectric barrier discharge electrode 3), electrode status (the working status of the corresponding surface dielectric barrier discharge electrode 3), time bar (the working time of the corresponding surface dielectric barrier discharge electrode 3), etc. At the same time, the corresponding status can be controlled and adjusted through the control panel 12.

[0058] It should be understood that the main unit 1 of the plasma generator for wound treatment of the present invention supports a self-test function, the self-test process is described in [link to self-test process]. Figure 9As shown, based on the measurement capacitance and acquisition circuit in the above embodiment, the host 1 can match the actual surface dielectric barrier discharge electrode 3 electrode sheet access status with the user's set access status, and compare whether it is consistent with the user's set access status. When there is a matching error, the host 1 will actively alarm and prompt the user to indicate the matching failure; when the matching is correct, the host 1 will continue to perform the discharge treatment function to ensure that the target wound is treated in a timely manner.

[0059] 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 generating device for wound treatment, characterized in that, include: The host (1) includes a high-frequency AC power supply and a plurality of first terminals (11). The high-frequency AC power supply has a plurality of output terminals, which are respectively connected to the input terminals of the plurality of first terminals (11). Multiple treatment patches (2), each treatment patch (2) has a second terminal (21) formed on it, the input end of the second terminal (21) is connected to the output end of the first terminal (11), and a silicone insulating pad (22) is provided on the second terminal (21). A surface dielectric barrier discharge electrode (3) is detachably fixed to the treatment patch (2), and the terminal of the surface dielectric barrier discharge electrode (3) is connected to the second terminal (21). A connecting cable (4) is used to connect the first terminal block (11) and the second terminal block (21), and the connecting cable (4) is an adjustable length cable.

2. The plasma generating device for wound treatment according to claim 1, characterized in that, The treatment patch (2) is provided with Velcro (23), and the back of the surface dielectric barrier discharge electrode (3) is fixed to the treatment patch (2) by the Velcro (23). And / or, The surface dielectric barrier discharge electrode (3) is fixed to the treatment patch (2) by adhesive.

3. The plasma generating device for wound treatment according to claim 1, characterized in that, The second terminal (21) is a coaxial snap-on interface terminal, and the second terminal (21) includes: The grounding ring (211) is connected to the grounding terminal of the high-frequency AC power supply through the connecting cable (4) and the first terminal (11); An insulating dielectric ring (212) is located inside the grounding ring (211); The high-voltage terminal (213) is located inside the insulating dielectric ring (212). The high-voltage terminal (213) is connected to the power output terminal of the high-frequency AC power supply through the connecting cable (4) and the first terminal (11).

4. The plasma generating device for wound treatment according to claim 3, characterized in that, The silicone insulating pad (22) covers the surface of the second terminal (21) facing away from the treatment patch (2). The terminal of the surface dielectric barrier discharge electrode (3) includes a metal pin (31) and a metal snap (32). The terminal of the surface dielectric barrier discharge electrode (3) is adapted to pass through the silicone insulating pad (22) and form a snap connection with the second terminal (21). The metal snap (32) is connected to the high voltage drive positive line of the surface dielectric barrier discharge electrode (3) and the reference potential ground line of the surface dielectric barrier discharge electrode (3).

5. The plasma generating device for wound treatment according to claim 4, characterized in that, The end of the high-voltage terminal (213) facing away from the treatment patch (2) has a concave structure, and a cross-shaped opening (221) is formed on the silicone insulating pad (22). The metal snap (32) is located on the outer periphery of the metal pin (31) to form a coaxial structure. The metal pin (31) is adapted to pass through the cross-shaped opening (221) to connect with the high-voltage terminal (213). The metal snap (32) is adapted to pass through the cross-shaped opening (221) to contact the grounding ring (211).

6. The plasma generating device for wound treatment according to any one of claims 1 to 5, characterized in that, The high-frequency AC power supply of the host (1) includes: Power supply unit; A high-frequency AC topology circuit is connected to the power supply unit, and the high-frequency AC topology circuit is a full-bridge inverter circuit; The cascaded multi-winding step-up transformer includes a primary winding and multiple secondary windings. The primary winding is connected to the output terminal of the high-frequency AC topology circuit, and the multiple secondary windings are connected one-to-one to multiple first terminals (11).

7. The plasma generating device for wound treatment according to claim 6, characterized in that, The secondary winding includes a positive terminal and a return terminal; The positive line terminal serves as the power output terminal of the high-frequency AC power supply and is connected to the terminal of the surface dielectric barrier discharge electrode (3) in sequence through the first terminal (11), the connecting cable (4), and the second terminal (21). The return line is connected to the grounding wire, serving as the grounding terminal of the high-frequency AC power supply. It is connected to the terminal of the surface dielectric barrier discharge electrode (3) in sequence through the first terminal (11), the connecting cable (4), and the second terminal (21).

8. The plasma generating device for wound treatment according to claim 7, characterized in that, A measuring capacitor is connected in series between the return line terminal and the grounding wire, and a sampling circuit is connected between the return line terminal and the positive line terminal, which is suitable for acquiring the voltage peak value between the return line terminal and the positive line terminal through the sampling circuit.

9. The plasma generating device for wound treatment according to claim 6, characterized in that, The high-frequency AC power supply of the host (1) operates in an open-loop frequency conversion control mode. During the operation of the high-frequency AC power supply, the operating frequency of the high-frequency AC topology circuit gradually changes from the minimum frequency to the maximum frequency, and then gradually changes from the maximum frequency to the minimum frequency, and repeats this cycle repeatedly, so that the power output of the high-frequency AC power supply forms a continuously changing frequency.

10. The plasma generating apparatus for wound treatment according to any one of claims 1 to 5, characterized in that, The host (1) also includes a control panel (12) and a display screen (13). The control panel (12) is used to control the switching of the high-frequency AC power supply with the multiple first terminals (11) respectively, so that the multiple first terminals (11) form working ports and non-working ports. The display screen (13) is used to display the operating status of the multiple first terminals (11).

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