Plasma device

Abstract

The utility model provides a plasma device. The plasma device comprises a reactor and a hose, the reactor comprises a gas inlet, a nozzle and an electrode; the electrode is connected with a power supply, the gas inlet is connected with reaction gas, and the reactor is used for generating plasma; the nozzle is connected with the first end of the hose, and the second end of the hose is used for spraying plasma jet. According to the plasma device provided by the utility model, the plasma generated by the reactor can be delivered for a long distance through the hose connected with the nozzle, on one hand, when the plasma device provided by the utility model is used, the high-voltage discharge structure for generating the plasma is far away from human tissues, and the safety of the plasma device can be improved; and on the other hand, the shape of the hose for spraying the plasma jet in the plasma device provided by the invention can also support the application in some specific scenes, such as neuroendoscopic surgery.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and specifically relates to a plasma device. Background Art

[0002] In recent years, with the development of low-temperature plasma technology, more and more medical plasma equipment has been applied in various fields, such as sterilization, beauty, skin diseases, wound treatment, tumor treatment, etc. However, the plasma jet generated by the current plasma device is usually only about 1 cm, which causes the high-voltage plasma generation site in most plasma devices to be close to the processed object in the human body. In biomedical applications, especially those involving direct treatment and use of the human body, on the one hand, the high-voltage discharge structure that generates plasma is too close to the human body, which poses a potential safety hazard to the human body. On the other hand, the high-voltage discharge structure of the plasma that generates the plasma jet occupies a certain space, which limits the application of plasma devices in specific scenarios, such as neuroendoscopic surgery.

[0003] Therefore, how to design a plasma device that can deliver plasma over longer distances is an urgent problem to be solved. Utility Model Content

[0004] In view of the above problems existing in the prior art, a plasma device is proposed, which can deliver plasma jets over a long distance.

[0005] This application provides the following solution.

[0006] In a first aspect, the present application provides a plasma device, comprising: a reactor and a hose;

[0007] The reactor includes a gas inlet, a nozzle and electrodes;

[0008] The electrode is used to connect to a power source, the gas inlet is used to connect to a reaction gas, and the reactor is used to generate plasma;

[0009] The nozzle is connected to the first end of the hose, and the second end of the hose is used to spray out the plasma jet.

[0010] In some possible embodiments, a metal wire is disposed inside the hose along the plasma flow direction.

[0011] In some possible embodiments, the flow area of ​​the nozzle of the reactor is larger than the flow area of ​​the second end of the hose.

[0012] In some possible embodiments, one end of the metal wire close to the reactor is grounded.

[0013] In some possible embodiments, the reactor includes a shell, one end of the shell is provided with an opening, and a second end of the shell is provided with a nozzle;

[0014] The opening is sealed by a seal, and the first end of the electrode is inserted into the reactor through the seal.

[0015] In some possible embodiments, the first end of the electrode is sharp.

[0016] In some possible embodiments, the gas inlet is disposed inside the electrode, a gas pipeline is disposed inside the electrode, and the reaction gas enters the reactor through the gas pipeline.

[0017] In some possible embodiments, the gas inlet is disposed on the sealing member, and the gas input pipe is inserted into the gas inlet on the sealing member, and the gas input pipe is used to input the reaction gas into the reactor.

[0018] The nozzle is provided with a ground electrode, which is grounded through a switch;

[0019] The switch is used to remain closed within a preset time period, and the starting point of the preset time period is the start-up time of the plasma device.

[0020] In some possible embodiments, the material of the hose includes any one of plastic, silicone, polyvinyl chloride or polytetrafluoroethylene.

[0021] In some possible embodiments, the length of the hose is not less than 0.5 m.

[0022] In some possible embodiments, the material of the metal wire includes any one of copper, tungsten, aluminum and stainless steel.

[0023] The plasma device provided in the present application can deliver the plasma generated by the reactor over a long distance through a hose connected to the nozzle. On the one hand, when the plasma device provided in the present application is in use, the high-voltage discharge structure that generates plasma is far away from human tissue, which can improve the safety of the plasma device; on the other hand, the shape of the hose that ejects the plasma jet in the plasma device provided in the present application can also support applications in some specific scenarios, such as neuroendoscopic surgery.

[0024] Other advantages of the present application will be explained in more detail with reference to the following description and drawings.

[0025] It should be understood that the above description is only an overview of the technical solution of the present application, so that the technical means of the present application can be more clearly understood and implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are specifically described below by way of example. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The advantages and benefits described herein and other advantages and benefits will be apparent to those skilled in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only used for the purpose of illustrating the exemplary embodiments and are not to be considered as limiting the present application. In the accompanying drawings:

[0027] Figure 1 A schematic diagram of a plasma device provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of another plasma device provided in an embodiment of the present application;

[0029] Figure 3 A side schematic diagram of another plasma device provided in an embodiment of the present application;

[0030] Figure 4 A bottom schematic diagram of another plasma device provided in an embodiment of the present application.

[0031] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0033] In the description of the embodiments of the present application, it should be understood that terms such as "including" or "having" are intended to indicate the presence of disclosed features, numbers, steps, behaviors, components, parts, or combinations thereof in this specification, and do not exclude the possibility of the presence of one or more other features, numbers, steps, behaviors, components, parts, or combinations thereof. The terms "first", "second", etc. are used only for the convenience of description to distinguish the same or similar technical features, and cannot be understood as indicating or implying the relative importance or quantity of these technical features. Thus, the features defined by "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise specified, the term "plurality" means two or more than two.

[0034] Unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. For the convenience of description, spatial relationship words such as “under”, “below”, “above”, “on”, etc. may be used here to describe the relationship between one element or feature shown in the drawings and other elements or features. It will be understood that these spatial relationship words are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings.

[0035] It should also be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] See also Figure 1 , which is a schematic diagram of a plasma device provided in an embodiment of the present application.

[0037] like Figure 1 As shown, the plasma device provided in the present application includes: a reactor 1 and a hose 2.

[0038] The reactor 1 includes a gas inlet 3, a nozzle 4 and an electrode 5. The electrode 5 is used to connect a power source, the gas inlet 3 is used to connect a reaction gas, and the reactor 1 is used to generate plasma. The nozzle 4 is connected to a first end of a hose 2, and a second end of the hose 2 is used to eject a plasma jet 10.

[0039] It should be noted that the material of the hose may include any one of plastic, silicone, polyvinyl chloride and polytetrafluoroethylene, which is not limited in the embodiments of the present application. The length of the hose in the embodiments of the present application is generally greater than or equal to 0.5m, and may also be other lengths according to the requirements of different application scenarios, which is not limited in the embodiments of the present application. The length of the hose in the embodiments of the present application is positively correlated with the voltage and frequency on the electrode. The longer the length of the hose, the higher the voltage on the electrode and the greater the frequency.

[0040] As a possible implementation, the voltage applied to the electrode in the embodiment of the present application may be a pulse voltage. Applying a pulse voltage to the electrode can improve the efficiency of the reactor in generating plasma to a certain extent. In practical applications, the outside of the electrode may be wrapped with a layer of quartz tube to make the discharge of the electrode more uniform, which is not limited in the embodiment of the present application.

[0041] It can be seen from this that the plasma device provided in the present application can deliver the plasma generated by the reactor over a longer distance through a hose connected to the nozzle. Therefore, when the plasma device provided in the present application is in use, the high-voltage discharge structure that generates plasma is far away from human tissue, which can improve the safety of the plasma device.

[0042] As a possible implementation, the plasma jet generated by the plasma device in the embodiment of the present application can be used for nasal inhalation by the patient, and the hose in the embodiment of the present application can be combined with an oxygen mask used in medical treatment, that is, the outlet at the second end of the hose in the present application can be connected to the oxygen mask, thereby facilitating the patient to inhale plasma and oxygen at the same time during treatment.

[0043] As a possible implementation method, the plasma jet generated by the plasma device in the application embodiment can be used for the treatment of the resection margin after neurosurgery tumor resection to reduce tumor invasion and recurrence, and can also be used in other scenarios, which are not limited in the present application embodiment. It should be noted that the plasma device in the related art does not have a hose for long-distance delivery. Since the length of the plasma jet is limited, generally only about 1 cm, this makes the high-voltage discharge structure that generates plasma have to be closer to the treated object. Since the high-voltage discharge structure of the plasma occupies a certain space, for some application scenarios that have special requirements for surgical operation space, such as endoscopic surgery, especially neuroendoscopic surgery, the application is greatly restricted.

[0044] In the plasma device of the present application, the generated plasma can be conveniently delivered to a desired location without being restricted by space by using the flexible hose connected to the nozzle of the plasma discharge device (reactor).

[0045] As a possible implementation, Figure 2 As shown, in the embodiment of the present application, a metal wire 6 may be arranged inside the hose 2 along the plasma flow direction. It should be noted that the metal wire 6 arranged inside the hose 2 along the plasma flow direction can assist the transmission of plasma inside the hose 2, increase the transmission efficiency of plasma inside the hose 2, thereby reducing the loss of plasma in the hose 2, which is beneficial to the plasma device in the present application to deliver the plasma jet over a long distance.

[0046] In actual applications, the length of the metal wire in the embodiment of the present application can be the same as the length of the hose, or shorter than the length of the hose, which is not limited in the embodiment of the present application. The material of the metal wire in the present application includes copper, tungsten, aluminum, stainless steel or other metal materials that can achieve the technical effect of the present application, which is not limited in the embodiment of the present application.

[0047] In the embodiment of the present application, one end of the metal wire close to the reactor can be grounded, which can assist the transmission of plasma in the hose to a certain extent. The other end of the metal wire in the present application can be connected to the wall of the hose to fix the metal wire. The embodiment of the present application does not limit the specific fixing method of the metal wire inside the hose.

[0048] As a possible implementation, the flow area of ​​the nozzle of the reactor in the embodiment of the present application is larger than the flow area of ​​the second end of the hose. The applicant has found that when the flow area of ​​the nozzle of the reactor is larger than the flow area of ​​the second end of the hose, it is more conducive to the ejection of the plasma jet at the second end of the hose, and the state of the plasma jet is better. In practical applications, if the cross section of the hose is circular, the inner diameter of the nozzle of the reactor can be larger than the inner diameter of the second end of the hose.

[0049] In the embodiments of the present application, Figure 3 and Figure 4 As shown, Figure 3 A schematic side view of a plasma device. Figure 4 1 is a bottom schematic diagram of a plasma device. The reactor may include a shell 7, one end of the shell 7 is provided with an opening, and the second end of the shell 7 is provided with a nozzle 4. As an example, the shell 7 may be made of quartz. The opening is sealed by a seal 8, and the first end of the electrode 5 is inserted into the reactor 1 through the seal 8. As a possible embodiment, the first end 9 of the electrode 5 may be sharp, so that the electrode 5 can discharge the reaction gas and improve the efficiency of plasma generation.

[0050] As a possible implementation, Figure 3 As shown, the gas inlet 3 in the present application can be arranged on the seal 8. Specifically, the present application can insert the gas inlet on the seal through a gas input pipe, and the gas input pipe is used to input the reaction gas into the reactor. The flow rate of the gas in the gas input pipe can be controlled by an external flow meter. As an example, the reaction gas can be introduced into the reaction gas at a constant flow rate (1L / min-5L / min), and the reaction gas component can be any one of high-purity helium, high-purity argon and a mixture of helium and argon, or a mixture of the foregoing gas with air, oxygen or nitrogen.

[0051] As another possible implementation, a gas pipeline is provided inside the electrode in the present application, and the reaction gas enters the reactor from the gas pipeline. That is, the outlet of the gas pipeline in the embodiment of the present application corresponds to the gas inlet in the above embodiment. It should be noted that the provision of a gas pipeline inside the electrode can avoid additional perforation on the seal, making the assembly of the plasma device provided in the embodiment of the present application simpler.

[0052] It should be noted that a ground electrode may be provided at the nozzle in the embodiment of the present application, and the ground electrode is grounded through a switch; the switch is used to remain closed within a preset time period, and the starting point of the preset time period is the start-up time of the plasma device. It should be noted that when the reactor in the embodiment of the present application is just started in the preset time period, grounding the ground electrode at the nozzle can form a voltage difference between the electrode and the ground electrode, thereby enhancing the efficiency of plasma generation to a certain extent. The preset time period in the embodiment of the present application can be 2s, and after the preset time period, the switch can be disconnected, and the electrode performs radiation discharge at this time.

[0053] In summary, the plasma device provided by the present application can deliver the plasma generated by the reactor over a long distance through the hose connected to the nozzle. On the one hand, when the plasma device provided by the present application is in use, the high-voltage discharge structure that generates plasma is far away from human tissue, which can improve the safety of the plasma device; on the other hand, the hose in the plasma device provided by the present application can also support specific scenarios, such as neuroendoscopic surgery. Moreover, a metal wire is arranged in the hose in the embodiment of the present application, and the flow area of ​​the reactor nozzle connected to the inlet of the first end of the hose is larger than the flow area of ​​the outlet, which is more conducive to the plasma jet being ejected from the outlet of the second end of the hose.

[0054] Although the illustrative embodiments of the present application have been described and illustrated in detail in the drawings and the foregoing description, they should be considered illustrative rather than restrictive, and it should be understood that only certain exemplary embodiments have been shown and described and that all changes and modifications within the spirit of the claimed application are intended to be protected. It should be understood that although the use of words such as preferred, preferred, preferred or more preferred in the above description indicates that the features described in this way may be more ideal, it may not be necessary and implementations without these features are conceivable within the scope of the present application, which scope is defined by the appended claims. When reading the claims, when words such as "one", "an", "at least one" or "at least one portion" are used, it is not intended to limit the claim to only one item, unless a contrary statement is specifically stated in the claim. When the language "at least a portion" and / or "a portion" is used, the item may include a portion and / or the entire item unless there is a specific statement to the contrary.

[0055] Although the spirit and principle of the present application have been described above with reference to several specific embodiments, it should be understood that the present application is not limited to the disclosed specific embodiments, and the division of various aspects does not mean that the features in these aspects cannot be combined. The present application is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the attached claims.

Claims

1. A plasma device, characterized in that: include: Reactor and hoses; The reactor comprises a gas inlet, a nozzle and electrodes; The electrode is used to connect to a power source, the gas inlet is used to connect to a reaction gas, and the reactor is used to generate plasma; The nozzle is connected to the first end of the hose, and the second end of the hose is used to eject the plasma jet.

2. The plasma device according to claim 1, characterized in that A metal wire is arranged inside the hose along the plasma flow direction.

3. The plasma device according to claim 1, characterized in that The flow area of ​​the nozzle of the reactor is larger than the flow area of ​​the second end of the hose.

4. The plasma device according to claim 2, characterized in that: One end of the metal wire close to the reactor is grounded.

5. The plasma device according to claim 1, characterized in that: The reactor comprises a shell, one end of the shell is provided with an opening, and the second end of the shell is provided with the nozzle; The opening is sealed by a seal, and the first end of the electrode is inserted into the reactor through the seal.

6. The plasma device according to claim 5, characterized in that The first end of the electrode is sharp.

7. The plasma device according to claim 5, characterized in that The gas inlet is arranged inside the electrode, a gas pipeline is arranged inside the electrode, and the reaction gas enters the reactor through the gas pipeline.

8. The plasma device according to claim 5, characterized in that The gas inlet is arranged on the sealing member, a gas input pipe is inserted into the gas inlet on the sealing member, and the gas input pipe is used to input reaction gas into the reactor.

9. The plasma device according to claim 5, characterized in that: The nozzle is provided with a ground electrode, and the ground electrode is grounded through a switch; The switch is used to remain closed within a preset time period, and the starting point of the preset time period is the start-up time of the plasma device.

10. The plasma device according to any one of claims 1 to 9, characterized in that: The material of the hose includes any one of plastic, silicone, polyvinyl chloride or polytetrafluoroethylene.

11. The plasma device according to any one of claims 1 to 9, characterized in that: The length of the hose is not less than 0.5m.

12. The plasma device according to claim 2, characterized in that: The material of the metal wire includes any one of copper, tungsten, aluminum and stainless steel.

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