Plasma jet device

Abstract

The application relates to the technical field of medical devices, and discloses a plasma jet device which comprises an outer tube, a first insulating inner tube and a plasma generator, the outer tube extends along a first direction; one end of the first insulating inner tube extends along the first direction and is arranged in the outer tube, and the other end of the first insulating inner tube is exposed outside the outer tube; the first insulating inner tube is provided with a first medium channel extending along the first direction, the first medium channel is provided with an inlet and an outlet at two ends respectively, the outlet is located in the outer tube, and the inlet is located outside the outer tube; the plasma generator is located in the outer tube, and the plasma generator is arranged closer to the outlet relative to the inlet; the plasma generator comprises a first electrode and a second electrode, the first electrode and the second electrode are connected to the first insulating inner tube and are arranged at intervals along the first direction; the polarities of the first electrode and the second electrode are opposite, so that the plasma jet device can be used for treating deep tissues of a human body.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and specifically to a plasma jet device. Background Technology

[0002] Cold atmospheric plasma has the characteristic of selectively killing tumor cells while causing less damage to normal tissues, and has broad application prospects in the medical field.

[0003] In existing technologies, the active particles of plasma have a short lifespan while the transmission distance is relatively long. During the transmission process, the activity of the plasma is continuously lost. When the plasma is transmitted to the lesion, its activity is insufficient, so it can only be used to treat superficial tissues or tumors on the body surface, and its therapeutic effect on deep tissues is not good. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a medical device capable of treating deep human tissues.

[0005] According to an embodiment of the present invention, a plasma jet device includes an outer tube, a first insulating inner tube, and a plasma generator. The outer tube extends along a first direction. One end of the first insulating inner tube extends along the first direction and passes through the outer tube, while the other end protrudes outside the outer tube. The first insulating inner tube has a first medium channel extending along the first direction, with an inlet and an outlet at both ends of the first medium channel, the outlet located inside the outer tube and the inlet located outside the outer tube. The plasma generator is located inside the outer tube and is positioned closer to the outlet than the inlet. The plasma generator includes a first electrode and a second electrode, both of which are connected to the first insulating inner tube and are spaced apart along the first direction. The polarities of the first electrode and the second electrode are opposite.

[0006] The plasma jet device according to embodiments of the present invention has at least the following beneficial effects: the outer tube extends along a first direction, one end of the first insulating inner tube extends along the first direction and passes through the outer tube, while the other end protrudes outside the outer tube. The first insulating inner tube has a first medium channel extending along the first direction, with an inlet and an outlet at both ends of the first medium channel. The outlet is located inside the outer tube, and the inlet is located outside the outer tube. The plasma generator is located inside the outer tube, and the plasma generator includes a first electrode and a second electrode. Both the first electrode and the second electrode are connected to the first insulating inner tube and are spaced apart along the first direction. The polarities of the first electrode and the second electrode are opposite. Thus, the working medium can enter the first medium channel through the inlet and flow towards the outlet. When the working medium passes through the first electrode and the second electrode, the electric field generated after the first electrode and the second electrode are energized can ionize the working medium, excite plasma, and form a plasma jet. The plasma is ejected from the outlet. Furthermore, since the outer tube is a long and narrow pipe, it can penetrate deep into the human body to more accurately deliver the plasma to deep tissues, thereby enabling the plasma jet device to treat deep tissues. The plasma generator is positioned closer to the outlet than the inlet. This ensures that the working medium is ionized by the plasma generator to form plasma only near the outlet, which shortens the plasma's transmission distance within the first medium channel and guarantees the plasma's activity upon reaching human tissue, thereby improving the therapeutic effect on deep tumor tissues.

[0007] According to some embodiments of the present invention, on a projection plane perpendicular to the first direction, the projections of the first electrode and the second electrode on the projection plane are both concentrically arranged with the projection of the outer tube on the projection plane; and / or, on a projection plane perpendicular to the first direction, the projections of the first insulating inner tube and the outer tube on the projection plane are concentrically arranged.

[0008] According to some embodiments of the present invention, the outer tube is a metal tube, and the first electrode and the second electrode are both spaced apart from the outer tube; and / or, the plasma jet device further includes a shielding layer, and the inner peripheral wall of the outer tube and / or the outer peripheral wall of the outer tube are connected to the shielding layer.

[0009] According to some embodiments of the present invention, the distance T between the first electrode and the second electrode along the first direction satisfies: 1mm≤T≤20mm.

[0010] According to some embodiments of the present invention, the outer tube has a first port and a second port spaced apart from each other along a first direction; wherein, the plasma jet device further includes a first positioning member, the first positioning member being connected to the outer tube and closing the first port, the first positioning member having a first mounting hole extending through along the first direction, and the first insulating inner tube having an outlet end inserted into the first mounting hole; and / or, the plasma jet device further includes a second positioning member, the second positioning member being connected to the outer tube and closing the second port, the second positioning member having a second mounting hole extending through along the first direction, and the first insulating inner tube passing through the second mounting hole.

[0011] According to some embodiments of the present invention, both the first electrode and the second electrode are annular and are sleeved outside the first insulating inner tube; the plasma jet device further includes a second insulating inner tube, a third insulating inner tube, a first wire and a second wire, an installation channel is formed between the outer peripheral wall of the first insulating inner tube and the inner peripheral wall of the outer tube, and the second insulating inner tube and the third insulating inner tube extend along a first direction and pass through the installation channel; the first wire passes through the second insulating inner tube, and one end is electrically connected to the first electrode, and the other end is exposed outside the outer tube; the second wire passes through the third insulating inner tube, and one end is electrically connected to the second electrode, and the other end is exposed outside the outer tube.

[0012] According to some embodiments of the present invention, the plasma jet device further includes insulating tape covering the first insulating inner tube, the second insulating inner tube, and the third insulating inner tube; and / or, the plasma jet device further includes insulating adhesive bonded between the outer peripheral wall of the first insulating inner tube, the outer peripheral wall of the second insulating inner tube, the outer peripheral wall of the third insulating inner tube, and the inner peripheral wall of the outer tube.

[0013] According to some embodiments of the present invention, the first electrode is annular and sleeved outside the first insulating inner tube, and the second electrode is disposed inside the first dielectric channel; the plasma jet device further includes a second insulating inner tube, a first wire, and a second wire. The second insulating inner tube extends along a first direction and passes through the outer tube, and is located between the outer peripheral wall of the first insulating inner tube and the inner peripheral wall of the outer tube; the first wire passes through the second insulating inner tube, and one end is electrically connected to the first electrode, while the other end protrudes outside the outer tube; the second wire passes through the first insulating inner tube, and one end is electrically connected to the second electrode, while the other end protrudes outside the outer tube.

[0014] According to some embodiments of the present invention, the plasma jet device further includes insulating tape covering the first insulating inner tube and the second insulating inner tube; and / or, the plasma jet device further includes insulating adhesive bonded between the outer peripheral wall of the first insulating inner tube, the outer peripheral wall of the second insulating inner tube, and the inner peripheral wall of the outer tube.

[0015] According to some embodiments of the present invention, the plasma jet device further includes a handle, the handle including a mounting portion and a gripping portion, one end of the outer tube along a first direction being connected to the mounting portion, and the gripping portion being connected to one side of the mounting portion along a second direction, the second direction intersecting the first direction; wherein, the plasma jet device further includes a button, the mounting portion and / or the gripping portion being connected to the button, the button being used to switch the conduction or cutoff of the first electrode and the second electrode; and / or, one end of the first insulating inner tube having an inlet is inserted into the mounting portion, the plasma jet device further includes a flexible tube, one end of the flexible tube being connected to the end of the first insulating inner tube having an inlet, and the other end being exposed outside the mounting portion; the flexible tube having a second medium channel, the second medium channel communicating with the first medium channel.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic diagram of the plasma jet device provided in an embodiment of the present invention is shown; Figure 2 A partially exploded structural diagram of the plasma jet device provided in an embodiment of the present invention is shown; Figure 3 A cross-sectional structural schematic diagram of the plasma jet device provided in an embodiment of the present invention is shown; Figure 4 A partial cross-sectional view of a plasma jet device provided in another embodiment of the present invention is shown. Figure 5 A partial cross-sectional structural schematic diagram of a plasma jet device provided in another embodiment of the present invention is shown.

[0018] Figure label: Plasma jet device 100; outer tube 110; first port 111; second port 113; first insulating inner tube 130; first medium channel 131; inlet 1311; outlet 1313; plasma generator 150; first electrode 151; second electrode 153; first through hole 1531; first positioning element 170; first mounting hole 171; second positioning element 190; second mounting hole 191; second insulating inner tube 210; third insulating inner tube 230; third positioning element 250; third mounting hole 251; second through hole 253; handle 270; mounting part 271; grip part 273; button 290; transformer 310; hose 330; First direction X; second direction Y; third direction Z. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 limiting this invention.

[0021] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "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 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.

[0024] Cold atmospheric plasma has the characteristic of selectively killing tumor cells while causing minimal damage to normal tissues, and it has broad application prospects in the medical field. However, in current technologies, the active particles of plasma have short lifespans while the transmission distance is relatively long. When the plasma reaches the lesion, its activity is insufficient, limiting its application to the treatment of superficial tissues or tumors on the body surface; its effectiveness in treating deep tissues is poor.

[0025] Based on this, please refer to Figures 1 to 3This application provides a plasma jet device 100 that can be used for the treatment of deep tissues.

[0026] The plasma jet device 100 includes an outer tube 110, a first insulating inner tube 130, and a plasma generator 150.

[0027] The outer tube 110 extends along the first direction X. One end of the first insulating inner tube 130 extends along the first direction X and passes through the outer tube 110, while the other end protrudes outside the outer tube 110. The first insulating inner tube 130 has a first medium channel 131 extending along the first direction X. The two ends of the first medium channel 131 have an inlet 1311 and an outlet 1313, respectively. The outlet 1313 is located inside the outer tube 110, and the inlet 1311 is located outside the outer tube 110. The plasma generator 150 is located inside the outer tube 110. The plasma generator 150 includes a first electrode 151 and a second electrode 153. The first electrode 151 and the second electrode 153 are both connected to the first insulating inner tube 130 and are spaced apart along the first direction X. The second electrode 153 has opposite polarity. Thus, the working medium can enter the first medium channel 131 through the inlet 1311 and flow towards the outlet 1313. When the working medium passes through the first electrode 151 and the second electrode 153, the electric field generated by the energization of the first electrode 151 and the second electrode 153 ionizes the working medium, exciting plasma and forming a plasma jet. The plasma is ejected from the outlet 1313. Furthermore, since the outer tube 110 is a long and narrow pipe, it can penetrate deep into the human body to more precisely target the plasma to deep tissues. Therefore, the plasma jet device 100 can treat deep tissues and can be applied in minimally invasive clinical surgeries, such as treating deep tumor tissues. In addition, by using the first insulating inner tube 130 to transmit the working medium, the length of the first insulating inner tube 130 can be flexibly set according to requirements. The first insulating inner tube 130 is a one-piece structure with no breaks in the middle, resulting in better overall airtightness and a simpler air path.

[0028] As an example, the second insulating inner tube 210 can be made of glass, ceramic, or other insulating materials. One end of the inlet 1311 of the first insulating inner tube 130 can be used to connect to a storage device containing a working medium. The working medium in the storage device can enter the first medium channel 131 through the inlet 1311. The working medium can be a cold atmospheric medium, which may include, but is not limited to, one or more of helium, argon, hydrogen, and other gases.

[0029] It should be noted that, in addition to treating deep tissues in the human body, the plasma jet device 100 can also be used in other scenarios, such as wound treatment, superficial tumor treatment, skin inflammation, oral and periodontal disinfection, and oral ulcer treatment. Of course, the plasma jet device 100 can also be used for treating internal and external tissues in pets, and for disinfecting object surfaces, such as instrument surface disinfection, food surface sterilization, and packaging surface disinfection.

[0030] The plasma generator 150 is positioned closer to the outlet 1313 than the inlet 1311. This ensures that the working medium is ionized by the plasma generator 150 to form plasma only near the outlet 1313, which shortens the transmission distance of the plasma within the first medium channel 131 and ensures the activity of the plasma when it reaches human tissue, thereby improving the therapeutic effect on deep tumor tissues.

[0031] In some embodiments, on a projection plane perpendicular to the first direction X, the projections of the first electrode 151 and the second electrode 153 on the projection plane are both concentrically arranged with the projection of the outer tube 110 on the projection plane. This makes the distance between the outer periphery of the first electrode 151 and the inner peripheral wall of the outer tube 110 more uniform, and the distance between the outer periphery of the second electrode 153 and the inner peripheral wall of the outer tube 110 more uniform. This helps to make the electric field energy distribution more uniform, reduces the situation of excessively strong or weak local electric field energy, and improves the stability of plasma excitation.

[0032] As an example, the inner peripheral wall of the outer tube 110 can be cylindrical, and the outer peripheral surfaces of the first electrode 151 and the second electrode 153 are both approximately cylindrical, so that the distance between the outer peripheral wall of the first electrode 151 and the inner peripheral wall of the outer tube 110 is approximately equal, and the distance between the outer peripheral wall of the second electrode 153 and the inner peripheral wall of the outer tube 110 is equal.

[0033] In some embodiments, on a projection plane perpendicular to the first direction X, the projections of the first insulating inner tube 130 and the outer tube 110 on the projection plane are concentrically arranged, thereby making the distance between the outer peripheral wall of the first insulating inner tube 130 and the inner peripheral wall of the outer tube 110 more uniform, which provides a basis for arranging the projections of the first electrode 151 and the second electrode 153 on the projection plane to be concentric with the projection of the outer tube 110 on the projection plane.

[0034] In some embodiments, the outer tube 110 can be a metal tube, which can improve the structural strength of the outer tube 110, help avoid the situation where the outer tube 110 is easily broken by external impact due to its long length, and extend the service life of the outer tube 110; in addition, the metal tube has electrical conductivity and can be used as a grounding carrier, which improves the safety of the plasma jet device 100; furthermore, the metal tube can also be used to shield the electric field, so as to confine the electric field within the metal tube, which helps to reduce the risk of electric shock caused by the leakage of the electric field within the outer tube 110, improves the safety of the plasma jet device 100, helps to avoid mutual interference between the plasma generator 150 and electronic devices in the surrounding environment, and helps the plasma generator 150 to excite plasma more stably.

[0035] As an example, the outer tube 110 can be made of stainless steel or other biocompatible metal.

[0036] In some embodiments, the first electrode 151 and the second electrode 153 are both spaced apart from the outer tube 110, which helps to avoid the first electrode 151 and the second electrode 153 being short-circuited through the outer tube 110, and can reduce leakage current in the outer tube 110, thereby improving the safety of the plasma jet device 100.

[0037] In some embodiments, the plasma jet device 100 may further include a shielding layer.

[0038] The inner and / or outer peripheral walls of the outer tube 110 are connected to a shielding layer. This shielding layer can also be used to shield the electric field, confining it within the outer tube 110. This helps reduce the risk of electric shock caused by leakage of the electric field from the outer tube 110, improving the safety of the plasma jet device 100. It also helps prevent interference between the plasma generator 150 and electronic equipment in the surrounding environment, facilitating more stable plasma generation by the plasma generator 150. Understandably, the shielding layer can be annular to cover the inner and / or outer peripheral walls of the outer tube 110.

[0039] The shielding layer can be made of stainless steel or other biocompatible materials.

[0040] In some embodiments, the distance T between the first electrode 151 and the second electrode 153 along the first direction X satisfies: 1mm≤T≤20mm, thereby controlling the distance between the first electrode 151 and the second electrode 153 within a suitable range. The first electrode 151 and the second electrode 153 can stably excite plasma, which helps to avoid the situation where the distance between the first electrode 151 and the second electrode 153 is too close, resulting in high voltage breakdown and short circuit. It also helps to avoid the situation where the distance between the first electrode 151 and the second electrode 153 is too far, resulting in insufficient electric field strength.

[0041] As an example, T can be 1mm, 2.5mm, 8mm, 10mm, 12mm, 15.6mm, 19.2mm, 20mm, or any value within the range of any two of the above values.

[0042] In some embodiments, the plasma jet device 100 may further include a first positioning element 170.

[0043] The outer tube 110 may have a first port 111 and a second port 113 spaced apart along the first direction X. The first positioning member 170 may be connected to the outer tube 110 and close the first port 111. For example, the first positioning member 170 may be fixed to the inner circumferential wall of the outer tube 110 by means of adhesive bonding, snap-fit, threaded connection, etc.

[0044] The first positioning member 170 has a first mounting hole 171 extending along the first direction X. The first insulating inner tube 130 has an outlet 1313 at one end inserted into the first mounting hole 171, thereby positioning the relative positions of the first insulating inner tube 130 and the outer tube 110, which helps to better control the concentric arrangement of the first insulating inner tube 130 and the outer tube 110. The first insulating inner tube 130 can be inserted through the second port 113 so that the end of the first insulating inner tube 130 with the inlet 1311 can be exposed outside the outer tube 110.

[0045] In some embodiments, the first positioning member 170 may be a metal positioning member or a plastic part. When the first positioning member 170 is a metal positioning member, the first positioning member 170 can shield the electric field, which helps to improve the leakage of the electric field from the first port 111.

[0046] In some embodiments, the plasma jet device 100 may further include a second positioning element 190.

[0047] The second positioning element 190 is connected to the outer tube 110 and closes the second port 113. The second positioning element 190 has a second mounting hole 191 extending along the first direction X. The first insulating inner tube 130 passes through the second mounting hole 191. Thus, the second positioning element 190 and the first positioning element 170 can provide two support points for the first insulating inner tube 130, which can more stably support the first insulating inner tube 130 and help to better control the concentric setting of the first insulating inner tube 130 and the outer tube 110. For example, the second positioning element 190 can be fixed to the inner circumferential wall of the outer tube 110 by means of insulating adhesive bonding, snap-fit, threaded connection, etc.

[0048] In some embodiments, the plasma jet device 100 may further include a second insulating inner tube 210, a third insulating inner tube 230, a first wire, and a second wire.

[0049] The first electrode 151 and the second electrode 153 are both annular and are fitted over the first insulating inner tube 130, which helps to form a more uniform electric field. The first electrode 151 and the second electrode 153 can be directly fitted over the first insulating inner tube 130, making installation convenient.

[0050] As an example, the first electrode 151 and the second electrode 153 can be bonded, snapped, or otherwise fixed to the outer peripheral wall of the first insulating inner tube 130.

[0051] An installation channel is formed between the outer peripheral wall of the first insulating inner tube 130 and the inner peripheral wall of the outer tube 110. The second insulating inner tube 210 and the third insulating inner tube 230 extend along the first direction X and pass through the installation channel. The first wire passes through the second insulating inner tube 210, with one end electrically connected to the first electrode 151 and the other end exposed outside the outer tube 110. The second wire passes through the third insulating inner tube 230, with one end electrically connected to the second electrode 153 and the other end exposed outside the outer tube 110. In this way, the first wire and the second wire pass through the second insulating inner tube 210 and the third insulating inner tube 230 respectively, which can separate the first wire and the second wire. The first wire and the second wire can transmit higher voltage current, which helps to improve the situation of high voltage breakdown short circuit between the first wire and the second wire, improves the efficiency and stability of plasma generation by plasma generator 150, and improves the safety of plasma jet device 100.

[0052] As an example, the second insulating inner tube 210 can be made of glass, ceramic, or other insulating tubes. The third insulating inner tube 230 can be made of glass, ceramic, or other insulating tubes.

[0053] In some embodiments, the plasma jet device 100 may further include insulating tape.

[0054] The insulating tape covers the first insulating inner tube 130, the second insulating inner tube 210, and the third insulating inner tube 230, thereby further insulating the inner tubes (including the first insulating inner tube 130, the second insulating inner tube 210, and the third insulating inner tube 230) and the outer tube 110, further reducing the leakage of the outer tube 110 and making the plasma jet device 100 safer. In addition, the insulating tape can also bind the first insulating inner tube 130, the second insulating inner tube 210, and the third insulating inner tube 230, and can locate the relative positions of the first insulating inner tube 130, the second insulating inner tube 210, and the third insulating inner tube 230.

[0055] Understandably, the insulating tape is wrapped from one end of the second insulating inner tube 210 and the third insulating inner tube 230 to the other end to more completely cover the second insulating inner tube 210 and the third insulating inner tube 230. A more complete insulating barrier can be formed between the second insulating inner tube 210 and the outer tube 110, and a more complete insulating barrier can be formed between the third insulating inner tube 230 and the outer tube 110.

[0056] In some embodiments, the plasma jet device 100 may also include insulating adhesive.

[0057] The insulating adhesive is bonded between the outer peripheral walls of the first insulating inner tube 130, the second insulating inner tube 210, the third insulating inner tube 230, and the inner peripheral wall of the outer tube 110. This adhesive secures and fixes the first insulating inner tube 130, the second insulating inner tube 210, the third insulating inner tube 230, and the outer tube 110, helping to prevent the first insulating inner tube 130, the second insulating inner tube 210, and the third insulating inner tube 230 from moving within the outer tube 110. Furthermore, the insulating adhesive can fill leakage gaps between the inner tubes, providing better insulation between the inner and outer tubes 110, further reducing leakage in the outer tube 110, and making the plasma jet device 100 safer.

[0058] When the plasma jet device 100 includes insulating tape and insulating adhesive, the insulating adhesive may be bonded only between the insulating tape and the inner peripheral wall of the outer tube 110; or, the insulating adhesive may be partially located within the space covered by the insulating tape to bond and fix the first insulating inner tube 130, the second insulating inner tube 210 and the third insulating inner tube 230, and the insulating adhesive may be partially located outside the insulating tape to bond and fix the insulating tape and the inner peripheral wall of the outer tube 110.

[0059] In some embodiments, the insulating adhesive may be applied only between the inner tube and the outer tube 110, or it may fill the space inside the outer tube 110.

[0060] In some embodiments, the outer diameters of the second insulating inner tube 210 and the third insulating inner tube 230 are both smaller than the outer diameter of the first insulating inner tube 130, and the inner diameters of the second insulating inner tube 210 and the third insulating inner tube 230 are both smaller than the inner diameter of the first insulating inner tube 130. This allows for the provision of a larger diameter first medium channel 131 within the first insulating inner tube 130, which transports more working medium and improves the efficiency of plasma generator 150 in stimulating plasma. Furthermore, the second insulating inner tube 210 and the third insulating inner tube 230 can be arranged with smaller outer diameters, reducing the space occupied by the second insulating inner tube 210 and the third insulating inner tube 230 within the outer tube 110. This reduces the outer diameter of the outer tube 110, enabling the plasma jet device 100 to be applied in minimally invasive clinical surgeries.

[0061] In some embodiments, the second insulating inner tube 210 and the third insulating inner tube 230 are configured to have the same structure, thereby eliminating the need to manufacture the second insulating inner tube 210 and the third insulating inner tube 230 separately, reducing the manufacturing cost of the second insulating inner tube 210 and the third insulating inner tube 230; in addition, when assembling the plasma jet device 100, the second insulating inner tube 210 and the third insulating inner tube 230 can be used interchangeably without distinction, improving assembly efficiency.

[0062] In some embodiments, the second insulating inner tube 210 and the third insulating inner tube 230230 can be symmetrically distributed on opposite sides of the outer tube 110, which helps to make the weight distribution more uniform and the distance between the first conductor and the second conductor is greater, further reducing the possibility of high voltage breakdown.

[0063] In some embodiments, the lengths of the second insulating inner tube 210 along the first direction X and the third insulating inner tube 230 along the first direction X are both less than the length of the first insulating inner tube 130 along the first direction X. The ends of the second insulating inner tube 210 and the third insulating inner tube 230 along the first direction X toward the outlet 1313 are spaced apart from the end of the first insulating inner tube 130 that has the outlet 1313, so as to leave space at the end of the first insulating inner tube 130 for installing the plasma generator 150.

[0064] It should be noted that the first electrode 151 and the second electrode 153 can also be arranged in other ways. For details, please refer to [link / reference needed]. Figure 2 and Figure 4 In some embodiments, the plasma jet device 100 may consist only of the second insulating inner tube 210, the first wire, and the second wire.

[0065] In this embodiment, the first electrode 151 can still be circular and sleeved on the outside of the first insulating inner tube 130. The second electrode 153 can be disposed inside the first dielectric channel 131 and connected to the inner peripheral wall of the first insulating inner tube 130. This can increase the intensity of the electric field in the first dielectric channel 131, which helps to improve the efficiency and stability of plasma excitation.

[0066] The second insulating inner tube 210 extends along the first direction X and passes through the outer tube 110, located between the outer peripheral wall of the first insulating inner tube 130 and the inner peripheral wall of the outer tube 110. The first wire passes through the second insulating inner tube 210, with one end electrically connected to the first electrode 151 and the other end exposed outside the outer tube 110. The second wire passes through the first insulating inner tube 130, with one end electrically connected to the second electrode 153 and the other end exposed outside the outer tube 110. Thus, the first wire and the second wire pass through the second insulating inner tube 210 and the first insulating inner tube 130, respectively. The ability to separate the first and second conductors allows for the transmission of higher voltage currents, which helps to mitigate the risk of high-voltage breakdown short circuits between them and improves the efficiency and stability of plasma generation by the plasma generator 150. Furthermore, the fact that only the second insulating inner tube 210 can be installed between the outer peripheral wall of the first insulating inner tube 130 and the inner peripheral wall of the outer tube 110 reduces the number of inner tubes and thus allows for a smaller outer tube 110, which helps to better apply plasma to minimally invasive clinical surgeries.

[0067] It should be noted that, in this embodiment, the plasma jet device 100 may also include a third insulating inner tube 230. The third insulating inner tube 230 can be supported between the outer peripheral wall of the first insulating inner tube 130 and the inner peripheral wall of the outer tube 110, which helps to stabilize the position of the first insulating inner tube 130 and reduces the shaking of the first insulating tube.

[0068] In some embodiments, where the second electrode 153 can be disposed within the first dielectric channel 131, the second electrode 153 can be a conductive rod that extends along the first direction X. The conductive rod can be made of copper or other conductive materials.

[0069] Please see Figure 5 In some embodiments, the second electrode 153 may be provided with a first through hole 1531, which can penetrate the second electrode 153 along the first direction X. The first through hole 1531 can allow the working medium to pass through, which helps to prevent the second electrode 153 from blocking the first medium channel 131.

[0070] In some embodiments, the end of the second electrode 153 facing the outlet 1313 may be a pointed end or a flat end.

[0071] In some embodiments, along the first direction X, the first electrode 151 is located between the second electrode 153 and the outlet 1313. Thus, when the second electrode 153 is a conductive rod, arranging the first electrode 151 between the second electrode 153 and the outlet 1313 helps to bring the discharge area between the first electrode 151 and the second electrode 153 closer to the outlet 1313, further shortening the distance of plasma transmission to human tissue, further ensuring the activity of plasma when it reaches human tissue, and avoiding the situation where the discharge area is far from the outlet 1313 due to the excessive length of the second electrode 153.

[0072] Please see Figure 2 and Figure 4 In some embodiments, the plasma jet device 100 may also include a third positioning element 250.

[0073] The third positioning member 250 can be disposed within the first medium channel 131 and connected to the inner peripheral wall of the first insulating inner tube 130. The third positioning member 250 can be provided with a third mounting hole 251 and at least one second through hole 253. The mounting hole can penetrate the third positioning member 250 along the first direction X. The second electrode 153 can pass through the third mounting hole 251 and be connected to the third positioning member 250. Thus, the third positioning member 250 can fix the second electrode 153 within the first medium channel 131 and can better control the concentricity of the second electrode 153 and the first electrode 151.

[0074] The third positioning element 250 may also be provided with at least one second through hole 253. The second through hole 253 can penetrate the third positioning element 250 along the first direction X and is spaced apart from the third positioning element 250. The second through hole 253 allows the working medium to pass through, which helps to prevent the second electrode 153 from blocking the first medium channel 131. At least one can be one or more, and multiple can be two or more. When the number of second through holes 253 is two or more, each second through hole 253 can be distributed around the third mounting hole 251. For example, each second through hole 253 can be evenly distributed around the third mounting hole 251, which helps to make the flow of the working medium more uniform.

[0075] In some embodiments, insulating tape covers the first insulating inner tube 130 and the second insulating inner tube 210, thereby further insulating the inner tube and the outer tube 110, reducing leakage in the outer tube 110, and making the plasma jet device 100 safer. Furthermore, the insulating tape can also bind the first insulating inner tube 130 and the second insulating inner tube 210, enabling the positioning of their relative positions. Understandably, in this embodiment, the inner tube includes the first insulating inner tube 130 and the second insulating inner tube 210.

[0076] Understandably, the insulating tape is wrapped from one end of the second insulating inner tube 210 to the other end to more completely cover the second insulating inner tube 210, thereby forming a more complete insulating barrier between the second insulating inner tube 210 and the outer tube 110.

[0077] In some embodiments, insulating adhesive is bonded between the outer peripheral wall of the first insulating inner tube 130, the outer peripheral wall of the second insulating inner tube 210, and the inner peripheral wall of the outer tube 110. This allows the insulating adhesive to bond and fix the first insulating inner tube 130, the second insulating inner tube 210, and the outer tube 110, helping to prevent the first insulating inner tube 130 and the second insulating inner tube 210 from moving around inside the outer tube 110. In addition, the insulating adhesive can fill the leakage gap between the inner tubes, providing better insulation between the inner tube and the outer tube 110, further reducing leakage in the outer tube 110, and making the plasma jet device 100 safer.

[0078] When the plasma jet device 100 includes insulating tape and insulating adhesive, the insulating adhesive may be bonded only between the insulating tape and the inner peripheral wall of the outer tube 110; or, the insulating adhesive may be partially located within the space covered by the insulating tape to bond and fix the first insulating inner tube 130 and the second insulating inner tube 210, and the insulating adhesive may be partially located outside the insulating tape to bond and fix the insulating tape and the inner peripheral wall of the outer tube 110.

[0079] Please see Figures 1 to 3 In some embodiments, the plasma jet device 100 may also include a handle 270, which may include a mounting portion 271 and a grip portion 273.

[0080] The outer tube 110 is connected to the mounting portion 271 at one end along the first direction X, and the grip portion 273 is connected to one side of the mounting portion 271 along the second direction Y, which intersects with the first direction X. This allows the user to grip the grip portion 273 to operate the plasma jet device 100, making it more convenient to use. Specifically, the end of the outer tube 110 with the second port 113 can be connected to the mounting portion 271. The outer tube 110 can be snapped, glued, or connected to the mounting portion 271 in other ways.

[0081] As an example, the mounting portion 271 may extend along a first direction X, and the grip portion 273 may extend along a second direction Y. The first direction X and the second direction Y may be perpendicular or not perpendicular. For example, the included angle A between the first direction X and the second direction Y satisfies: 90°≤A≤130°, which helps to improve the user feel of holding the plasma jet device 100.

[0082] In some embodiments, the plasma jet device 100 may also include a button 290.

[0083] The mounting part 271 and / or the grip part 273 are connected to a button 290. The button 290 is used to switch the first electrode 151 and the second electrode 153 on or off, so that the user can switch the first electrode 151 and the second electrode 153 on or off by operating the button 290, making the operation of the plasma jet device 100 more convenient. When the mounting part 271 is connected to the button 290, the button 290 is away from the grip part 273, which helps to reduce the possibility of accidentally pressing the button 290; when the grip part 273 is connected to the button 290, the user can hold and operate the button 290 with one hand, making the operation more convenient.

[0084] As an example, the plasma jet device 100 may also include a circuit board, which may be disposed within the grip portion 273 or the mounting portion 271. The button 290, the first wire, and the second wire are all electrically connected to the circuit board, allowing the user to control the circuit's on / off state by operating the button 290, thereby switching the first electrode 151 and the second electrode 153 on or off. The circuit board can be electrically connected to an external power source via wires to obtain power. The external power source may be an AC high-voltage power supply, a radio frequency pulse power supply, a nanosecond / microsecond pulse high-voltage power supply, or other power sources.

[0085] In some embodiments, the plasma jet device 100 may further include a transformer 310.

[0086] The transformer 310 can be installed in the mounting part 271 or the holding part 273. The transformer 310 can be electrically connected between the circuit board and the external power supply to adjust the working voltage of the first electrode 151 and the second electrode 153, which helps to flexibly adjust the electric field strength.

[0087] As an example, the plasma jet device 100 may also include an adjustment roller rotatably connected to the mounting portion 271 to help prevent accidental activation. The adjustment roller can be electrically connected to the transformer 310, and the user can adjust the operating state of the transformer 310 by rotating the adjustment roller to adjust the output voltage, thereby flexibly adjusting the voltage of the first electrode 151 and the second electrode 153.

[0088] The transformer 310 can be any known transformer 310, as long as it can achieve the purpose of the embodiments of this application. The embodiments of this application are not limited.

[0089] In some embodiments, the mounting portion 271 may include a first mounting portion and a second mounting portion, and the gripping portion 273 may include a first gripping portion and a second gripping portion.

[0090] The first mounting portion and the second mounting portion can be opposite to and connected along a third direction Z. For example, the first mounting portion and the second mounting portion can be snapped together, connected by fasteners, or connected by other means. The end of the outer tube 110 away from the first direction X is snapped between the first mounting portion and the second mounting portion. For example, the end of the outer tube 110 with a first port 111 can be snapped between the first mounting portion and the second mounting portion. The third direction Z is respectively arranged to intersect with the first direction X and the second direction Y.

[0091] The first gripping part can be connected to one side of the first mounting part along the second direction Y, and the second gripping part can be connected to one side of the second mounting part along the second direction Y. The first gripping part and the second gripping part can be opposite to and connected along the third direction Z. For example, the first gripping part and the second gripping part can be snapped together, connected by fasteners, or connected by other means.

[0092] The first mounting part and the first grip part can be integrally molded, and the second mounting part and the second grip part can be integrally molded, which helps to improve the structural strength of the handle 270.

[0093] In some embodiments, the plasma jet device 100 may further include a flexible tube 330.

[0094] The first insulating inner tube 130 has one end with an inlet 1311 inserted into the mounting part 271. One end of the flexible hose 330 is connected to the end of the first insulating inner tube 130 with the inlet 1311, and the other end protrudes outside the mounting part 271. The flexible hose 330 has a second medium channel, which is connected to the first medium channel 131. Thus, the plasma jet device 100 can be connected to an external storage device through the flexible hose 330. The plasma jet device 100 can adapt to various types of storage devices. In addition, by extending the length of the flexible hose 330, the plasma jet device 100 can be used over a longer distance, making it more convenient for users.

[0095] As an example, one end of the hose 330 can be fitted onto the end of the first insulating inner tube 130 where the inlet 1311 is provided, and the other end of the hose 330 can extend through the mounting portion 271 at the end away from the outer tube 110 along the first direction X, so as to protrude outside the handle 270.

[0096] In the plasma jet device 100 provided in this embodiment, the outer tube 110 extends along the first direction X, and one end of the first insulating inner tube 130 extends along the first direction X and passes through the outer tube 110, while the other end protrudes outside the outer tube 110. The first insulating inner tube 130 has a first medium channel 131 extending along the first direction X. The two ends of the first medium channel 131 have an inlet 1311 and an outlet 1313, respectively. The outlet 1313 is located inside the outer tube 110, and the inlet 1311 is located outside the outer tube 110. The plasma generator 150 is located inside the outer tube 110 and includes a first electrode 151 and a second electrode 153. Both the first electrode 151 and the second electrode 153 are connected to the first insulating inner tube 110. The tube 130 is spaced apart along the first direction X. The first electrode 151 and the second electrode 153 have opposite polarities. Thus, the working medium can enter the first medium channel 131 through the inlet 1311 and flow to the outlet 1313. When the working medium passes through the first electrode 151 and the second electrode 153, the electric field generated after the first electrode 151 and the second electrode 153 are energized can ionize the working medium, excite plasma, and form a plasma jet. The plasma is ejected from the outlet 1313. Furthermore, since the outer tube 110 is a long and narrow pipe, the outer tube 110 can penetrate deep into the human body to more accurately deliver the plasma to the deep tissues of the human body. Thus, the plasma jet device 100 can treat the deep tissues of the human body. The plasma generator 150 is positioned closer to the outlet 1313 than the inlet 1311. This ensures that the working medium is ionized by the plasma generator 150 to form plasma only near the outlet 1313, which shortens the transmission distance of the plasma within the first medium channel 131 and ensures the activity of the plasma when it reaches human tissue, thereby improving the therapeutic effect on deep tumor tissues.

[0097] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

Claims

1. A plasma jet device, characterized in that, include: The outer tube extends along the first direction; A first insulating inner tube has one end extending along the first direction and passing through the outer tube, and the other end protruding outside the outer tube; the first insulating inner tube has a first medium channel extending along the first direction, and the two ends of the first medium channel have an inlet and an outlet respectively, the outlet being located inside the outer tube and the inlet being located outside the outer tube; A plasma generator is located inside the outer tube, and the plasma generator is positioned closer to the outlet than the inlet; the plasma generator includes a first electrode and a second electrode, both of which are connected to the first insulating inner tube and are spaced apart along the first direction; the first electrode and the second electrode have opposite polarities.

2. The plasma jet device according to claim 1, characterized in that, On a projection plane perpendicular to the first direction, the projections of the first electrode and the second electrode on the projection plane are both concentrically arranged with the projection of the outer tube on the projection plane. And / or, on a projection plane perpendicular to the first direction, the projections of the first insulating inner tube and the outer tube on the projection plane are concentrically arranged.

3. The plasma jet device according to claim 1, characterized in that, The outer tube is a metal tube, and the first electrode and the second electrode are both spaced apart from the outer tube; And / or, the plasma jet device further includes a shielding layer, wherein the inner peripheral wall of the outer tube and / or the outer peripheral wall of the outer tube are connected to the shielding layer.

4. The plasma jet device according to claim 1, characterized in that, The distance T between the first electrode and the second electrode along the first direction satisfies: 1mm≤T≤20mm.

5. The plasma jet device according to claim 1, characterized in that, The outer tube has a first port and a second port spaced apart from each other along the first direction; The plasma jet device further includes a first positioning element, which is connected to the outer tube and closes the first port. The first positioning element has a first mounting hole extending through it along the first direction, and the first insulating inner tube has the first mounting hole inserted into one end of it having the outlet. And / or, the plasma jet device further includes a second positioning member, which is connected to the outer tube and closes the second port. The second positioning member has a second mounting hole extending through it along the first direction, and the first insulating inner tube passes through the second mounting hole.

6. The plasma jet apparatus according to any one of claims 1 to 5, characterized in that, Both the first electrode and the second electrode are annular and are fitted over the first insulating inner tube; The plasma jet device further includes a second insulating inner tube, a third insulating inner tube, a first wire, and a second wire. An installation channel is formed between the outer peripheral wall of the first insulating inner tube and the inner peripheral wall of the outer tube. The second insulating inner tube and the third insulating inner tube extend along the first direction and pass through the installation channel. The first wire passes through the second insulating inner tube, with one end electrically connected to the first electrode and the other end exposed outside the outer tube. The second wire passes through the third insulating inner tube, with one end electrically connected to the second electrode and the other end exposed outside the outer tube.

7. The plasma jet device according to claim 6, characterized in that, The plasma jet device also includes insulating tape, which covers the first insulating inner tube, the second insulating inner tube and the third insulating inner tube; And / or, the plasma jet device further includes insulating adhesive, which is bonded between the outer peripheral wall of the first insulating inner tube, the outer peripheral wall of the second insulating inner tube, the outer peripheral wall of the third insulating inner tube, and the inner peripheral wall of the outer tube.

8. The plasma jet apparatus according to any one of claims 1 to 5, characterized in that, The first electrode is annular and is sleeved outside the first insulating inner tube, while the second electrode is disposed inside the first dielectric channel; The plasma jet device further includes a second insulating inner tube, a first wire, and a second wire. The second insulating inner tube extends along the first direction and passes through the outer tube, located between the outer peripheral wall of the first insulating inner tube and the inner peripheral wall of the outer tube. The first wire passes through the second insulating inner tube, with one end electrically connected to the first electrode and the other end exposed outside the outer tube. The second wire passes through the first insulating inner tube, with one end electrically connected to the second electrode and the other end exposed outside the outer tube.

9. The plasma jet device according to claim 8, characterized in that, The plasma jet device also includes insulating tape, which covers the first insulating inner tube and the second insulating inner tube. And / or, the plasma jet device further includes insulating adhesive, which is bonded between the outer peripheral wall of the first insulating inner tube, the outer peripheral wall of the second insulating inner tube, and the inner peripheral wall of the outer tube.

10. The plasma jet apparatus according to any one of claims 1 to 5, characterized in that, The plasma jet device further includes a handle, which includes a mounting part and a gripping part. One end of the outer tube along the first direction is connected to the mounting part, and the gripping part is connected to one side of the mounting part along the second direction, which intersects the first direction. The plasma jet device further includes a button, and the mounting part and / or the gripping part are connected to the button. The button is used to switch the first electrode and the second electrode on or off. And / or, the end of the first insulating inner tube with the inlet passes through the mounting portion, and the plasma jet device further includes a hose, one end of which is connected to the end of the first insulating inner tube with the inlet, and the other end of which protrudes outside the mounting portion; the hose is provided with a second medium channel, and the second medium channel is connected to the first medium channel.

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