JP6936190B2 - Plasma treatment device - Google Patents

Description

The present invention relates to a plasma therapy apparatus.

Conventionally, in medical applications such as dental treatment, a plasma-type treatment device is known that irradiates an affected area with plasma or an active gas containing an active species generated by plasma to heal a wound or the like. Examples of such a plasma type treatment device include a plasma jet irradiation device and an active gas irradiation device.

For example, Patent Document 1 discloses a dental medical treatment device (plasma jet irradiation device) in which a plasma jet irradiation means is mounted on an irradiation device for performing dental treatment to enable plasma jet irradiation on a treated affected area. Such a plasma jet irradiation device used as a dental medical treatment device generates plasma and directly irradiates the irradiated body with the generated plasma and the active species generated by reacting with the gas in or around the plasma. It is a thing. Examples of the active species include active oxygen species such as hydroxyl radical, singlet oxygen, ozone, hydrogen peroxide and superoxide anion radical, nitric oxide, nitrogen dioxide, peroxynitrite, nitrite peroxide, dinitrogen trioxide and the like. Examples include reactive nitrogen species.
According to the invention described in Patent Document 1, the wound or the like is healed by directly irradiating the affected area with the generated plasma.

Further, Patent Document 2 discloses an active gas irradiating device that generates an active gas (active species) inside an irradiation device and discharges the active gas from a nozzle to irradiate the affected area. Such an active gas is, for example, active oxygen, active nitrogen, or the like.
According to the invention described in Patent Document 2, the wound and the like are healed by directly irradiating the affected area with the generated active gas as described above.

Japanese Patent No. 5441066 JP-A-2017-50267

Here, in the plasma type treatment device, in order to suppress the temperature rise on the surface of the irradiated body and enhance the effect such as wound healing, the discharge port for discharging plasma or active gas and the surface of the irradiated body are used. The distance needs to be adjusted to the optimum range. However, in the conventional plasma type treatment device, no device has been made to adjust the distance between the discharge port of the plasma or the active gas and the surface of the irradiated body within the optimum range. Therefore, if the distance between the discharge port and the surface of the irradiated body is too short, there is a problem that the temperature of the surface of the irradiated body becomes too high, and the distance between the discharge port and the surface of the irradiated body is long. If it is too much, there is a problem that a sufficient wound healing effect cannot be obtained.

The present invention has been made in view of the above problems, and keeps the distance between the plasma or active gas discharge port and the surface of the irradiated object within the optimum range without complicating the configuration or increasing the equipment cost. However, it is an object of the present invention to provide a plasma type treatment apparatus capable of stable irradiation of plasma or an active gas.

In order to solve the above problems, the present invention has the following aspects.
[1] An irradiation device having a plasma generating portion for generating plasma and a nozzle having a discharge port for discharging either one or both of the plasma and the active gas generated by the plasma is provided, and further, the discharge port is provided. A plasma-type treatment apparatus including a guide body that separates the plasma from the irradiated body to which the plasma or the active gas is irradiated.
[2] The plasma-type treatment device according to the above [1], wherein the guide body is attached to the nozzle.
[3] The plasma-type treatment apparatus according to the above [1] or [2], wherein the guide body has a cylindrical shape.
[4] The plasma-type treatment apparatus according to the above [1] or [2], wherein the guide body is bent in an L-shape in a plan view.
[5] The plasma-type treatment apparatus according to the above [3] or [4], wherein the guide body has a variable length dimension at least in a part in the length direction.
[6] The plasma-type treatment device according to the above [5], wherein the guide body is at least partially expandable and contractible in the length direction.
[7] The plasma treatment according to any one of [3] to [6] above, wherein at least a part of the guide body in the length direction has a shape in which the inner diameter gradually decreases toward the tip end side. Device.
[8] The plasma type according to any one of [3] to [8] above, wherein at least a part of the guide body in the length direction has a horn shape in which the inner diameter gradually increases toward the tip end side. Treatment device.
[9] The plasma-type treatment apparatus according to the above [8], wherein the guide body is formed by arranging a plurality of tongue-shaped pieces apart from each other in a horn-shaped portion.
[10] The plasma treatment according to the above [9], wherein the plurality of tongue-shaped pieces are made of an elastic material, and the distance between the discharge port and the irradiated body is variable by the deformation of the tongue-shaped pieces. Device.
[11] The plasma-type treatment apparatus according to any one of [3] to [10] above, wherein the guide body has a rounded tip portion formed in an arc shape in a vertical cross section.
[12] The plasma treatment apparatus according to any one of [1] to [11] above, wherein the guide body includes a contact sensor for detecting the presence or absence of contact with the irradiated body.
[13] Further, when the detection signal of the contact sensor is input and the contact between the guide body and the irradiated body is detected, the control unit for starting energization to the plasma generating unit is provided. ] The plasma type treatment apparatus according to.
[14] The plasma-type treatment device according to the above [13], wherein the control unit energizes the plasma generating unit only while the contact sensor detects contact between the guide body and the irradiated body. ..
[15] The control unit accumulates the contact time between the guide body and the irradiated body detected by the contact sensor, and compares the cumulative contact time with a preset scheduled irradiation time. The plasma-type treatment apparatus according to the above [14], wherein the plasma generating portion is energized only at the predetermined irradiation time set in advance.

In the present specification, the “active gas” refers to a gas having high chemical activity including any of active species such as radicals, excited atoms / molecules, and ions.

According to the plasma type treatment apparatus of the present invention, by providing the above configuration, the distance between the discharge port of the plasma or the active gas and the surface of the irradiated body is maintained in the optimum range, and the plasma or the active gas is maintained with respect to the irradiated body. Can be stably irradiated. Therefore, a plasma-type treatment device in which the temperature rise on the surface of the irradiated body is suppressed and the effect of wound healing and the like is enhanced can be realized with a simple configuration and low cost.

It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention. It is a partial cross-sectional view of the irradiation apparatus provided in the plasma type treatment apparatus which concerns on one Embodiment of this invention. It is xx cross-sectional view of the irradiation apparatus shown in FIG. It is a block diagram which shows the schematic structure of the plasma type therapy apparatus which concerns on one Embodiment of this invention. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, and is the partial breakthrough diagram which shows an example of a guide body. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, and is the partial breakthrough diagram which shows another example of a guide body. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, is the figure which shows the other example of a guide body, (a) is a plan view, (b) is a perspective view. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, and is the partial breakthrough diagram which shows another example of a guide body. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, and is the partial breakthrough diagram which shows another example of a guide body. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, and is the partial breakthrough diagram which shows another example of a guide body. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, and is the partial breakthrough diagram which shows another example of a guide body. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, and is the partial breakthrough diagram which shows another example of a guide body. It is a schematic diagram which shows the plasma type therapy apparatus which concerns on one Embodiment of this invention, and is the schematic diagram which shows another example of a guide body.

Hereinafter, embodiments of the plasma-type treatment apparatus of the present invention will be given, and the configuration thereof will be described in detail with reference to FIGS. 1 to 13 as appropriate. In addition, in each drawing used in the following description, in order to make it easy to understand the characteristics of the plasma type treatment apparatus of the present invention, the characteristic portion may be enlarged for convenience, and the dimensional ratio of each component, etc. May differ from the actual one. Further, the materials, dimensions, etc. exemplified in the following description are examples, and the present invention is not limited thereto, and the present invention can be appropriately modified without changing the gist thereof.

The plasma-type treatment apparatus according to the present invention includes an irradiation instrument having a plasma generating portion for generating plasma and a nozzle having a discharge port for discharging either or both of the plasma and the active gas generated by the plasma. Further, it is provided with a guide body for separating the discharge port and the irradiated body to be irradiated with plasma or active gas by a certain distance, which is roughly configured.
The plasma type treatment device of the present invention may be a plasma jet irradiation device or an active gas irradiation device as long as it includes an irradiation device having a plasma generating unit and a nozzle and a guide body. ..

The plasma jet irradiator generates plasma. The plasma jet irradiation device directly irradiates the irradiated body with the generated plasma and the active species. The active species is produced by the reaction of the gas in the plasma or the gas around the plasma with the plasma. Examples of the active species include active oxygen species and active nitrogen species. Examples of active oxygen species include hydroxyl radical, singlet oxygen, ozone, hydrogen peroxide, and superoxide anion radical. Examples of the active nitrogen species include nitric oxide, nitrogen dioxide, peroxynitrite, nitrite peroxide, dinitrogen trioxide and the like.
The active gas irradiator generates plasma. The active gas irradiation device irradiates the irradiated body with an active gas containing an active species. The active species is produced by the reaction of the gas in the plasma or the gas around the plasma with the plasma.

[Configuration of plasma treatment device]
Hereinafter, the detailed configuration of the plasma-type treatment apparatus of the present embodiment will be described mainly with reference to FIGS. 1 to 5.
The plasma treatment device described in this embodiment is an active gas irradiation device.

As shown in FIG. 1, the plasma type treatment device 100 includes an irradiation device (instrument) 10, a supply unit 20, a gas pipeline 30, and an electrical wiring 40. A guide body 60 is attached to the tip of the nozzle 1 included in the irradiation device 10.
The gas pipeline 30 connects the irradiation device 10 and the supply unit 20. The electrical wiring 40 electrically connects the irradiation device 10 and the supply unit 20.
In the illustrated example, the gas pipe line 30 and the electric wiring 40 are independent of each other, but the gas pipe line 30 and the electric wiring 40 may be integrally configured.

(Irradiation equipment)
FIG. 2 is a partial cross-sectional view showing a cross section of the irradiation device 10 along the axis. FIG. 3 is a cross-sectional view taken along the line xx of the irradiation device 10 shown in FIG.
The irradiation device 10 includes a long cowling 2, a nozzle 1 protruding from the tip of the cowling 2, a plasma generating unit 12 located in the cowling 2, and an operation switch 9 (operation) provided on the outer peripheral surface of the cowling 2. Department) and. Further, as described above, a guide body 60, which will be described in detail later, is fixed to the tip of the nozzle 1.

The cowling 2 includes a cylindrical body portion 2b and a head portion 2a provided at the tip of the body portion 2b. The body portion 2b is not limited to a cylindrical shape, and may be a polygonal cylinder such as a square cylinder, a hexagonal cylinder, or an octagonal cylinder.

The material of the body portion 2b is not particularly limited, but a material having electrical insulation is preferable from the viewpoint of preventing electric shock. The body portion 2b may be formed of only an electrically insulating material, or may have a multilayer structure having an electrically insulating material and a layer of a metal material on the surface thereof.
Examples of the electrically insulating material include thermoplastic resins and thermosetting resins. Examples of the thermoplastic resin include polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylonitrile-butadiene-styrene resin (ABS resin) and the like. Examples of the thermosetting resin include phenol resin, melamine resin, urea resin, epoxy resin, unsaturated polyester resin, and silicon resin.
Further, as the metal material, aluminum, copper, iron, stainless steel and the like can be exemplified.
The size of the body portion 2b is not particularly limited, and can be a size that can be easily grasped by fingers.

The head portion 2a is formed so as to gradually narrow toward the tip. That is, the head portion 2a in this embodiment has a conical shape. The head portion 2a is not limited to a conical shape, and may be a polygonal weight such as a square weight, a hexagonal weight, or an octagonal weight.
A fitting hole 2c into which the nozzle 1 is inserted is formed at the tip of the head portion 2a. The nozzle 1 is detachably provided on the head portion 2a. In FIG. 2, reference numeral O1 is a pipe shaft of the body portion 2b. Inside the head portion 2a, a first active gas flow path 7 extending in the direction of the pipe axis O1 is formed.
An operation switch 9 is provided on the outer peripheral surface of the body portion 2b.

The material of the head portion 2a is not particularly limited and may or may not have an insulating property. The material of the head portion 2a is preferably a material having excellent wear resistance and corrosion resistance. Examples of materials having excellent wear resistance and corrosion resistance include metals such as stainless steel. The materials of the head portion 2a and the body portion 2b may be the same or different.
The size of the head portion 2a is determined in consideration of the application of the plasma type treatment device 100 and the like. For example, when the plasma type treatment device 100 is an oral treatment instrument, the size of the head portion 2a is preferably a size that can be inserted into the oral cavity.

The nozzle 1 includes a pedestal portion 1b that fits into the fitting hole 2c and an irradiation tube 1c. The pedestal portion 1b and the irradiation tube 1c are integrally formed. A second active gas flow path 8 is formed inside the nozzle 1, and a discharge port 1a is formed at the tip thereof. The second active gas flow path 8 and the first active gas flow path 7 communicate with each other.

The material of the nozzle 1 is not particularly limited, but may or may not have an insulating property. The material of the nozzle 1 is preferably a material having excellent wear resistance and corrosion resistance. Examples of materials having excellent wear resistance and corrosion resistance include metals such as stainless steel.
Further, as the nozzle 1, for example, a disposable type material may be used from the viewpoint of hygiene.
The length of the flow path in the irradiation tube 1c (that is, the distance L2) can be appropriately determined in consideration of the application of the plasma type treatment device 100 and the like.
The opening diameter of the discharge port 1a is preferably 0.5 to 5 mm, for example. When the opening diameter is at least the above lower limit value, the pressure loss of the active gas can be suppressed. When the opening diameter is not more than the above upper limit value, the flow velocity of the irradiated active gas can be increased to further promote healing and the like.
The irradiation tube 1c is bent with respect to the tube axis O1.
The angle θ formed by the tube axis O2 and the tube axis O1 of the irradiation tube 1c can be determined in consideration of the application of the plasma type treatment device 100 and the like.

As shown in FIGS. 2 and 3, the plasma generating unit 12 includes a tubular dielectric 3, an internal electrode 4, and an external electrode 5.
As shown in FIG. 3, the tubular dielectric 3, the internal electrode 4, and the external electrode 5 are located concentrically with respect to the tube axis O1.
In the present embodiment, the outer peripheral surface of the inner electrode 4 and the inner peripheral surface of the outer electrode 5 face each other with the tubular dielectric 3 interposed therebetween.

The tubular dielectric 3 is a cylindrical member extending in the direction of the tube axis O1. Inside the tubular dielectric 3, a gas flow path 6 extending in the direction of the tube axis O1 is formed. The first active gas flow path 7 and the gas flow path 6 communicate with each other. The tube shaft O1 is the same as the tube shaft of the tubular dielectric 3.

As the material of the tubular dielectric 3, a dielectric material used in a known plasma device can be applied. Examples of the material of the tubular dielectric 3 include glass, ceramics, synthetic resin and the like. The lower the dielectric constant of the tubular dielectric 3, the more preferable.

The inner diameter R of the tubular dielectric 3 is appropriately determined in consideration of the outer diameter d of the internal electrode 4. The inner diameter R is determined so that the distance s described later is within a desired range.

The internal electrode 4 is a substantially columnar member extending in the direction of the tube axis O1. The internal electrode 4 is located inside the tubular dielectric 3 and is separated from the inner surface of the tubular dielectric 3.
The internal electrode 4 includes a shaft portion extending in the direction of the tube shaft O1 and a thread on the outer peripheral surface of the shaft portion. The shaft portion may be solid or hollow. The shaft portion is preferably solid. If the shaft is solid, it is easy to process and the mechanical durability can be improved. The thread of the internal electrode 4 is a spiral thread that orbits in the circumferential direction of the shaft portion. The form of the internal electrode 4 is the same as that of the male screw.
Since the internal electrode 4 has a thread on the outer peripheral surface, the electric field at the tip of the thread is locally strengthened, and the discharge start voltage is lowered. Therefore, plasma can be generated and maintained with low power.
The internal electrode 4 does not have to have irregularities such as threads on the outer peripheral surface. That is, the internal electrode 4 may be a cylindrical member having no unevenness on the outer peripheral surface.

The outer diameter d of the internal electrode 4 is appropriately determined in consideration of the application of the plasma type treatment device 100 (that is, the size of the irradiation device 10) and the like. When the plasma type treatment device 100 is an oral treatment device, the outer diameter d is preferably 0.5 to 20 mm, more preferably 1 to 10 mm. When the outer diameter d is equal to or more than the above lower limit value, the internal electrode can be easily manufactured. In addition, when the outer diameter d is at least the above lower limit value, the surface area becomes large, plasma can be generated more efficiently, and healing and the like can be further promoted. When the outer diameter d is not more than the above upper limit value, plasma can be generated more efficiently and healing or the like can be further promoted without making the irradiation device 10 excessively large.

The thread height h of the internal electrode 4 can be appropriately determined in consideration of the outer diameter d of the internal electrode 4.
The pitch p of the threads of the internal electrode 4 can be appropriately determined in consideration of the length of the internal electrode 4, the outer diameter d, and the like. The pitch p is preferably 0.2 to 3.0 mm, more preferably 0.2 to 2.5 mm, and even more preferably 0.2 to 2.0 mm.

The material of the internal electrode 4 is not particularly limited as long as it is a conductive material, and a metal used for an electrode of a known plasma device can be applied. Examples of the material of the internal electrode 4 include metals such as stainless steel, copper, and tungsten: and carbon.

The internal electrodes 4 include JIS B 0205: 2001 metric screw standard products (M2, M2.2, M2.5, M3, M3.5, etc.) and JIS B 2016: 1987 metric screw standard products (Tr8). × 1.5, Tr9 × 2, Tr9 × 1.5, etc.), JIS B 0206: 1973 unified coarse thread standard products (No. 1-64UNC, No. 2-56UNC, No. 3-48UNC, etc.) The specifications equivalent to those of the above are preferable. If the specifications are equivalent to those of these standard products, it is advantageous in terms of cost.

The distance s between the outer surface (the apex of the thread) of the internal electrode 4 and the inner surface of the tubular dielectric 3 is preferably 0.05 to 5 mm, more preferably 0.1 to 1 mm. When the distance s is equal to or greater than the above lower limit value, a desired amount of gas can be easily passed. When the distance s is equal to or less than the above upper limit value, plasma can be generated more efficiently and the temperature of the active gas can be lowered.

The external electrode 5 is an annular electrode that orbits along the outer peripheral surface of the tubular dielectric 3. The external electrode 5 exists on a part of the outer peripheral surface of the tubular dielectric 3.

The material of the external electrode 5 is not particularly limited as long as it is a conductive material, and a metal used for an electrode of a known plasma device can be applied. Examples of the material of the external electrode 5 include metals such as stainless steel, copper and tungsten, carbon and the like.

The total of the distance L1 from the tip center point Q1 of the internal electrode 4 to the tip Q2 of the head portion 2a and the distance L2 from the tip Q2 to the discharge port 1a (that is, the distance from the internal electrode 4 to the discharge port 1a) is It is appropriately determined in consideration of the size of the plasma type treatment device 100, the temperature on the surface irradiated with the active gas (the surface of the irradiated body), and the like. If the sum of the distance L1 and the distance L2 is long, the temperature of the surface of the irradiated body can be lowered. When the sum of the distance L1 and the distance L2 is short, the radical density of the active gas can be further increased, and the effects such as purification, activation, and healing on the surface of the irradiated body can be further enhanced. The tip Q2 is an intersection of the pipe shaft O1 and the pipe shaft O2.
The temperature of the irradiated surface is measured by, for example, a thermocouple or a thermography.

The operation switch 9 transmits an electric signal for starting the discharge of the active gas from the nozzle 1 by being operated by the user.
The operation switch 9 is, for example, a push button. When the operation switch 9 is a push button, the operation switch 9 may have a configuration in which an electric signal is transmitted only once when the user presses the push button once, and the user keeps pressing the push button. During that time, it may have a configuration in which an electric signal is continuously transmitted.

(Supply unit)
FIG. 4 is a block diagram showing a schematic configuration of the plasma type treatment device (active gas irradiation device) 100 of the present embodiment.
The supply unit 20 includes a gas supply source 70, a control unit 90, a power supply unit (not shown), and a housing 21 for accommodating them.
The housing 21 accommodates the supply source 70 in a detachable manner. As a result, the supply source 70 can be replaced when the gas in the supply source 70 housed in the housing 21 runs out.
In the present embodiment, a plurality of supply units 20 may be provided to supply two or more different types or the same type of gas to the irradiation device 10.

The power supply unit (not shown) supplies electricity to each component in the operation switch 9, the plasma generation unit 12, and the supply unit 20 of the irradiation device 10.
The feeding unit can adjust the voltage and frequency applied between the internal electrode 4 and the external electrode 5 of the plasma generating unit 12.
The power feeding unit is connected to, for example, a power source (not shown) such as a 100V household power source.

The supply source 70 supplies the plasma generation gas to the plasma generation unit 12. The supply source 70 is a pressure-resistant container in which a gas for plasma generation is housed. As shown in FIG. 4, the supply source 70 is detachably attached to the pipe 75 arranged in the housing 21. The pipe 75 connects the supply source 70 and the gas pipe line 30.
A solenoid valve 71, a pressure regulator 73, a flow rate controller 74, and a pressure sensor 72 (remaining amount sensor) are attached to the pipe 75.

When the solenoid valve 71 is opened, the plasma generating gas is supplied from the supply source 70 to the irradiation device 10 via the pipe 75 and the gas pipeline 30. In the illustrated example, the solenoid valve 71 does not have a configuration in which the valve opening degree can be adjusted, but has a configuration in which only opening and closing can be switched. The solenoid valve 71 may have a configuration in which the valve opening degree can be adjusted.

The pressure regulator 73 is arranged between the solenoid valve 71 and the supply source 70. The pressure regulator 73 reduces the pressure of the plasma generating gas (reducing the plasma generating gas) from the supply source 70 toward the solenoid valve 71.

The flow rate controller 74 is arranged between the solenoid valve 71 and the gas pipeline 30. The flow rate controller 74 adjusts the flow rate (supply amount per unit time) of the plasma generating gas that has passed through the solenoid valve 71. The flow rate controller 74 adjusts the flow rate of the plasma generating gas to, for example, 3 L / min.

The pressure sensor 72 detects the remaining amount V1 of the plasma generating gas at the supply source 70. The pressure sensor 72 measures the pressure (residual pressure) in the supply source 70 as the remaining amount V1. The pressure sensor 72 measures the pressure (primary pressure) of the plasma generating gas passing between the pressure regulator 73 and the supply source 70 (primary side of the pressure regulator 73) as the pressure of the supply source 70. As the pressure sensor 72, for example, Keyence's AP-V80 series (specifically, for example, AP-15S) or the like can be adopted.

A joint 76 is provided at the end of the pipe 75 on the supply source 70 side. A supply source 70 is detachably attached to the joint 76. By attaching and detaching the supply source 70 to and from the joint 76, the solenoid valve 71, the pressure regulator 73, the flow rate controller 74, and the pressure sensor 72 (hereinafter referred to as “solenoid valve 71, etc.”) are fixed to the housing 21 and the supply source is maintained. The 70 can be replaced.
In this case, a common solenoid valve 71 or the like can be used for both the supply source 70 before replacement and the supply source 70 after replacement. The solenoid valve 71 and the like may be fixed to the supply source 70 and may be integrally detachable from the housing 21 together with the supply source 70.

The control unit 90 is configured by using, for example, an information processing device. That is, the control unit 90 includes a CPU (Central Processor Unit), a memory, and an auxiliary storage device connected by a bus. The control unit 90 operates by executing a program. The control unit 90 may be built in the supply unit 20, for example. The control unit 90 controls the irradiation device 10 and the supply unit 20.

The solenoid valve 71, the pressure sensor 72, the flow rate controller 74, and the operation switch 9 of the irradiation device 10 are electrically connected to the control unit 90.
The control unit 90 controls the solenoid valve 71 and the flow rate controller 74.

The operation switch 9 of the irradiation device 10 is electrically connected to the control unit 90 via the electrical wiring 40. When the user operates the operation switch 9, an electric signal is sent from the operation switch 9 to the control unit 90. When the control unit 90 receives the electric signal from the operation switch 9, the control unit 90 operates the solenoid valve 71 and the flow rate controller 74.

When the operation switch 9 is a push button and the user transmits an electric signal only once when the push button is pressed, the control unit 90 uses, for example, the solenoid valve 71 and the flow rate controller 74 as shown below. Control.
When the control unit 90 receives the electric signal from the operation switch 9, the control unit 90 opens the solenoid valve 71 for a predetermined time to cause the flow controller 74 to adjust the flow rate of the plasma generating gas that has passed through the solenoid valve 71. Further, the control unit 90 applies a voltage between the internal electrode 4 and the external electrode 5 for a predetermined time. As a result, a certain amount of plasma generating gas is supplied from the supply source 70 to the plasma generating unit 12, and the active gas is continuously discharged from the nozzle 1 for a predetermined time (for example, about several seconds to several tens of seconds).

When the operation switch 9 is a push button and the user keeps pressing the push button while continuously transmitting an electric signal, the control unit 90 uses, for example, the solenoid valve 71, the flow rate controller 74, and the drawing as shown below. Controls the abbreviated power supply unit.
While the control unit 90 receives the electric signal from the operation switch 9, the control unit 90 opens the solenoid valve 71 and causes the flow controller 74 to adjust the flow rate of the plasma generating gas that has passed through the solenoid valve 71. Further, the control unit 90 applies a voltage between the internal electrode 4 and the external electrode 5. As a result, while the user keeps pressing the operation switch 9, the plasma generation gas is supplied from the supply source 70 to the plasma generation unit 12, and the active gas is continuously discharged from the nozzle 1.

(Gas pipeline)
The gas pipeline 30 is a path for supplying the plasma generating gas from the supply unit 20 to the irradiation device 10. The gas pipeline 30 is connected to the rear end of the tubular dielectric 3 of the irradiation device 10. The material of the gas pipe line 30 is not particularly limited, and a known material used for the gas pipe can be applied. As the material of the gas pipeline 30, for example, a resin pipe, a rubber tube, or the like can be exemplified, and a flexible material is preferable.

(Electric wiring)
The electrical wiring 40 electrically connects the wiring that supplies electricity from the power supply unit of the supply unit 20 to the plasma generation unit 12 of the irradiation device 10, and the operation switch 9 of the irradiation device 10 and the control unit 90 of the supply unit 20. Provide wiring.
The electrical wiring 40 is connected to the internal electrode 4, the external electrode 5, and the operation switch 9 of the irradiation device 10. The material of the electric wiring 40 is not particularly limited, and a known material used for the electric wiring can be applied. Examples of the material of the electric wiring 40 include a metal conducting wire coated with an insulating material.

(Guide body)
In the plasma type treatment device according to the present invention, the guide body 60 is attached to the irradiation device 10. In the examples shown in FIGS. 1 and 2, a substantially cylindrical guide body 60 as shown in an enlarged view in the fracture view of FIG. 5 is attached so as to be press-fitted into the tip of the nozzle 1.
The guide body in the present embodiment may be, for example, a structure that can be washed and used repeatedly, or may be a disposable type. Examples of the method for cleaning the guide body include a cleaning method using an autoclave and the like, in addition to cleaning with ethanol.
Further, a configuration in which the nozzle and the guide body are integrated may be adopted.

The guide body 60 separates the discharge port 1a of the nozzle 1 from the irradiated body H to which the plasma or the active gas is irradiated by a predetermined dimension in the length direction of the guide body 60. That is, as shown in FIG. 5, by pressing the tip 60a of the guide body 60 against the surface of the irradiated body H, the distance between the discharge port 1a and the irradiated body H is maintained at a predetermined distance. More specifically, by appropriately setting the length dimension N from the position corresponding to the discharge port 1a to the tip portion 60a of the guide body 60, the plasma or the active gas can be stably stabilized with respect to the irradiated body H. It is set in a range in which irradiation can be performed and the temperature of the surface of the irradiated body H can be suppressed from extremely rising, for example, in the range of 1.0 to 10 mm. By setting the length dimension N of the guide body 60 to the above range, the distance between the discharge port 1a and the irradiated body H is also within this range. When the distance between the discharge port 1a and the irradiated body H is equal to or greater than the lower limit of the above range, the temperature of the irradiated surface can be lowered and the irritation to the irradiated surface can be further alleviated. Further, when the distance between the discharge port 1a and the irradiated body H is not more than the upper limit value in the above range, the effect of healing and the like can be further enhanced.

The shape of the guide body is not limited to the simple cylindrical shape shown in FIG.
For example, the guide body 61 of the example shown in FIG. 6 may be bent in an L shape in a plan view.

Further, in the present embodiment, the guide body may be configured so that at least a part in the length direction has a variable length dimension. More specifically, as in the guide body 62 of the example shown in FIG. 7, a bellows portion 62b that can be expanded and contracted may be provided in a part in the length direction. In the guide body 62 of the illustrated example, the tip portion 62a is rigidly configured, while the bellows portion 62b is flexible and expandable and bendable. Thereby, for example, even if the treatment site is a narrow place such as the oral cavity, the bellows portion 62b flexibly expands and contracts, so that the distance between the discharge port 1a and the surface of the irradiated body can be flexibly adjusted. Therefore, more effective irradiation of plasma or active gas becomes possible.

Further, as in the guide body 63 of the example shown in FIG. 8, a part in the length direction may be composed of a block member 63b made of a flexible material such as rubber. According to the guide body 63 shown in FIG. 8, the orientation of the tip portion 63a and the length dimension of the guide body 63 can be changed by arbitrarily deforming the block member 63b.

Further, in the present embodiment, as in the guide body 64 of the example shown in FIGS. 9A and 9B, the entire block member 64b is made of a flexible material in the length direction, and the tip portion 64a has a diameter. It may have a configuration that can be expanded in a direction. The guide body 64 is usually formed into a substantially cylindrical shape as shown in FIG. 9B, but for example, when the tip portion 64a is pressed against the surface of the irradiated body, as shown in FIG. 9A. When the block member 64b is deformed, the tip portion 64a is configured to expand in the radial direction.

Further, as in the guide body 65 shown in FIG. 10, at least a part in the length direction may have a horn shape in which the inner diameter gradually increases toward the tip portion 65a side. The inner diameter of the guide body 65 in the illustrated example gradually increases as the horn portion 65b moves from the attachment portion 65c side to the nozzle 1 to the tip portion 65a side. According to the guide body 65 of the illustrated example, having the horn shape as described above makes it possible to effectively irradiate plasma or an active gas while increasing the irradiation area on the surface of the irradiated body.

Further, in the present embodiment, as in the guide body 66 shown in FIGS. 11A and 11B, the horn-shaped portion is configured such that a plurality of tongue-shaped pieces are arranged apart from each other. You may. In the guide body 66 of the illustrated example, the horn portion 66b is composed of a plurality of tongue-shaped pieces 66d, and is arranged so that the inner diameter gradually increases from the attachment portion 66c side to the nozzle 1 toward the tip portion 66a side. .. According to the guide body 66 of the illustrated example, by adopting the horn configuration as described above and further configuring the plurality of tongue-shaped pieces 66d from the elastic material, the discharge port 1a and the irradiated body are formed by the deformation of the tongue-shaped pieces. The distance to and is variable. That is, when the tip portion 66a of the guide body 66 is pressed against the surface of the irradiated body, each of the plurality of tongue-shaped pieces 66d is deformed, so that the inner diameter of the tip portion 66a is expanded, while the discharge port 1a and the irradiated portion 66a are irradiated. The distance to the surface of the body becomes shorter. According to the guide body 66 of the illustrated example, according to the above configuration, the distance between the discharge port 1a and the surface of the irradiated body can be changed by the pressing force of the guide body 66 on the irradiated body.

Further, as in the guide body 67 shown in FIG. 12, at least a part in the length direction may have a shape in which the inner diameter gradually decreases toward the tip portion 65a side. The guide body 67 of the illustrated example has a shape in which the inner diameter of the squeezed portion 67b gradually decreases from the cylindrical straight body portion 67c side toward the tip portion 67a side. According to the guide body 67 of the illustrated example, the above configuration makes it possible to irradiate the irradiated body with plasma or an active gas at high speed.

It is more preferable that each of the above-mentioned guide bodies provided in the irradiation device of the present embodiment has a rounded cross-sectional arc shape at the tip portion in contact with the irradiated body. Taking the guide body 68 shown in FIG. 13 as an example, the tip portion 68a is formed in a rounded arcuate cross-section so that this portion slightly penetrates into the skin or the like to be the irradiated body H. Since they come into contact with each other, the irradiation efficiency of plasma or active gas is improved.

Next, in the present embodiment, although detailed illustration is omitted, a configuration in which the guide body includes a contact sensor for detecting the presence or absence of contact with the irradiated body may be adopted. Examples of such a contact sensor include a piezoelectric sensor attached to the tip of a guide body.
Further, in the present embodiment, in the configuration provided with the above-mentioned contact sensor, when the above-mentioned control unit 90 detects the contact between the guide body and the irradiated body by inputting the detection signal of the contact sensor, the plasma generating unit It may have a function of starting energization to. As a result, the operation of the operation switch 9 described above can be omitted, so that the operability is excellent.
Further, in the present embodiment, the control unit 90 may have a function of energizing the plasma generating unit 12 only while the contact sensor detects the contact between the guide body and the irradiated body. As a result, the operation of the operation switch 9 can be omitted as described above, and the operability is excellent.
Further, in the present embodiment, the control unit 90 accumulates the contact time between the guide body and the irradiated body detected by the contact sensor, and compares the cumulative contact time with the preset scheduled irradiation time. Therefore, it may have a function of energizing the plasma generating portion only at a preset scheduled irradiation time. As a result, the irradiated body can be irradiated with plasma or an active gas at an appropriate time without operating the operation switch 9.

[How to use the plasma treatment device]
Next, a method of using the plasma type treatment device 100 will be described.
For example, a user such as a doctor holds and moves the irradiation device 10 and directs the nozzle 1 toward the irradiated body described later. In this state, the operation switch 9 is pressed to supply plasma generation gas from the supply source 70 of the supply unit 20 to the plasma generation unit 12 of the irradiation device 10 via the gas pipeline 30, and the plasma of the irradiation device 10 is supplied from the supply unit 20. Electricity is supplied to the generation unit 12.
The plasma generating gas supplied to the plasma generating portion 12 flows into the inner space portion of the tubular dielectric 3 from the rear end portion of the tubular dielectric 3. The plasma generating gas is ionized at a position where the internal electrode 4 to which the voltage is applied and the external electrode 5 face each other, and becomes plasma.

In the present embodiment, the internal electrode 4 and the external electrode 5 face each other in a direction orthogonal to the flow direction of the plasma generating gas. The plasma generated at the position where the outer peripheral surface of the inner electrode 4 and the inner peripheral surface of the outer electrode 5 face each other is the gas flow path 6, the first active gas flow path 7, and the second active gas flow path 8. In this order. During this time, the plasma passes through while changing the gas composition, and becomes an active gas containing active species such as radicals.

The active gas generated as described above is discharged from the discharge port 1a of the nozzle 1. The discharged active gas further activates a part of the gas in the vicinity of the discharge port 1a to generate an active species. The irradiated body is irradiated with an active gas containing these active species.

Examples of the irradiated body include cells, biological tissues, and individual organisms.
Examples of living tissues include organs (visceral organs), epithelial tissues covering the inner surface of the body surface and body cavity, periodontal tissues (gingival, alveolar bone, periodontal ligament, cementy substance, etc.), teeth, bones and the like. Examples of diseases and symptoms that can be treated by irradiation with active gas include oral diseases such as gingival inflammation and periodontal disease, and skin wounds.
Examples of individual organisms include mammals (humans, dogs, cats, pigs, etc.), birds, fish, and the like.

Examples of the plasma generating gas include rare gases (helium, neon, argon, krypton, etc.), nitrogen, air, oxygen, and the like. These gases may be used alone or in combination of two or more.
The plasma generating gas preferably contains nitrogen as a main component. In the present embodiment, the fact that nitrogen is the main component means that the nitrogen content in the plasma generating gas is more than 50% by volume.
That is, the nitrogen content in the plasma generating gas is preferably more than 50% by volume, more preferably 70% by volume or more, further preferably 80 to 100% by mass, and particularly preferably 90 to 100% by mass. Examples of gas components other than nitrogen in the plasma generating gas include oxygen and rare gases.

When the plasma type treatment device 100 is an oral treatment device, the oxygen concentration of the plasma generating gas introduced into the tubular dielectric 3 is preferably 1% by volume or less. When the oxygen concentration is not more than the upper limit, the generation of ozone can be reduced.

The flow rate of the plasma generating gas introduced into the tubular dielectric 3 is preferably 1 to 10 L / min. When the flow rate of the plasma generating gas introduced into the tubular dielectric 3 is at least the above lower limit value, it is easy to suppress an increase in the temperature of the irradiated surface in the irradiated body. When the flow rate of the plasma generating gas is not more than the above upper limit value, the cleaning, activation or healing of the irradiated body can be further promoted.

The AC voltage applied between the internal electrode 4 and the external electrode 5 is preferably 5 kVpp or more and 20 kVpp or less. Here, the unit "Vpp (Volt peak to peak)" representing the AC voltage is the potential difference between the highest value and the lowest value of the AC voltage waveform.
When the internal electrode 4 is a cylindrical member having no unevenness on the outer peripheral surface, the AC voltage applied between the internal electrode 4 and the external electrode 5 is preferably 10 kVpp or more. When the internal electrode 4 having no unevenness on the outer peripheral surface is used, it is necessary to increase the AC voltage applied between the internal electrode 4 and the external electrode 5 as compared with the case where the internal electrode 4 having unevenness on the outer peripheral surface is used. be.
When the applied AC voltage is not more than the above upper limit value, the temperature of the generated plasma can be suppressed low. When the applied AC voltage is equal to or higher than the above lower limit value, plasma can be generated more efficiently.

The frequency of the alternating current applied between the internal electrode 4 and the external electrode 5 is preferably 0.5 kHz or more and less than 20 kHz, more preferably 1 kHz or more and less than 15 kHz, further preferably 2 kHz or more and less than 10 kHz, and particularly preferably 3 kHz or more and less than 9 kHz. Most preferably, it is 4 kHz or more and less than 8 kHz. When the AC frequency is not more than the above upper limit value, the temperature of the generated plasma can be suppressed low. When the AC frequency is equal to or higher than the above lower limit, plasma can be generated more efficiently.

The temperature of the active gas irradiated from the discharge port 1a of the nozzle 1 is preferably 50 ° C. or lower, more preferably 45 ° C. or lower, and even more preferably 40 ° C. or lower. When the temperature of the active gas irradiated from the discharge port 1a of the nozzle 1 is not more than the above upper limit value, the temperature of the irradiated surface is likely to be 40 ° C. or less. By setting the temperature of the irradiated surface to 40 ° C. or lower, irritation to the affected area can be reduced even when the irradiated area is the affected area. The lower limit of the temperature of the active gas irradiated from the discharge port 1a of the nozzle 1 is not particularly limited, and is, for example, 10 ° C. The temperature of the active gas is a value obtained by measuring the temperature of the active gas at the discharge port 1a with a thermocouple.

The distance (irradiation distance) from the discharge port 1a to the surface of the irradiated body is preferably in the range of 1.0 to 10 mm, for example, by appropriately setting the length of the guide body as described above. .. When the irradiation distance is at least the above lower limit value, the temperature of the surface of the irradiated body can be lowered, and the irritation to the irradiated body can be further alleviated. When the irradiation distance is not more than the above upper limit value, the effect of healing and the like can be further enhanced.

The temperature of the surface of the irradiated body at a position separated from the discharge port 1a at a distance of 1 mm or more and 10 mm or less is preferably 40 ° C. or less. When the temperature of the surface of the irradiated body is 40 ° C. or lower, the irritation to the surface of the irradiated body can be reduced. The lower limit of the temperature of the surface of the irradiated body is not particularly limited, but is, for example, 10 ° C.
The temperature of the surface of the irradiated body is a combination of the AC voltage applied between the internal electrode 4 and the external electrode 5, the discharge amount of the activated gas to be irradiated, the distance from the tip center point Q1 of the internal electrode 4 to the discharge port 1a, and the like. It can also be adjusted by. The temperature of the surface of the irradiated body can be measured using a thermocouple.

Examples of active species contained in the active gas include hydroxyl radical, singlet oxygen, ozone, hydrogen peroxide, superoxide anion radical, nitric oxide, nitrogen dioxide, peroxynitrite, nitrite peroxide, dinitrogen trioxide, etc. It can be exemplified. The type of active species contained in the active gas can be adjusted by, for example, the type of plasma generating gas.

The density of hydroxyl radicals (radical density) in the active gas is preferably 0.1 to 300 μmol / L, more preferably 0.1 to 100 μmol / L, and even more preferably 0.1 to 50 μmol / L. When the radical density is at least the above lower limit value, it is easy to promote the cleansing, activation or healing of abnormalities of the irradiated body selected from cells, biological tissues and individual organisms. When the radical density is not more than the above upper limit value, the irritation to the surface of the irradiated body can be reduced.

The radical density can be measured by, for example, the following method.
0.2 mL of a 0.2 mol / L solution of DMPO (5,5-dimethyl-1-pyrroline-N-oxide) is irradiated with an active gas for 30 seconds. At this time, the distance from the discharge port 1a to the liquid level is 5.0 mm. The hydroxyl radical concentration of the solution irradiated with the active gas is measured by using the electron spin resonance (ESR) method, and this is used as the radical density.

The density of singlet oxygen (singlet oxygen density) in the active gas is preferably 0.1 to 300 μmol / L, more preferably 0.1 to 100 μmol / L, and even more preferably 0.1 to 50 μmol / L. When the singlet oxygen density is at least the above lower limit value, it is easy to promote the cleansing, activation or healing of abnormalities of the irradiated body such as cells, biological tissues and individual organisms. When it is not more than the above upper limit value, the irritation to the surface of the irradiated body can be reduced.

The singlet oxygen density can be measured by, for example, the following method.
Irradiate 0.4 mL of a 0.1 mol / L solution of TPC (2,2,5,5-tetramethyl-3-pyrroline-3-carboxamide) with an active gas for 30 seconds. At this time, the distance from the discharge port 1a to the liquid level is 5.0 mm. The singlet oxygen concentration of the solution irradiated with the active gas is measured by using the electron spin resonance (ESR) method, and this is defined as the singlet oxygen density.

The flow rate of the active gas discharged from the discharge port 1a is preferably 1 to 10 L / min.
When the flow rate of the active gas discharged from the discharge port 1a is equal to or higher than the above lower limit value, the effect of the active gas acting on the surface of the irradiated body can be sufficiently enhanced. When the flow rate of the active gas discharged from the discharge port 1a is not more than the above upper limit value, it is possible to prevent the temperature of the surface of the irradiated body of the active gas from rising excessively. In addition, when the surface of the irradiated body is wet, rapid drying of the surface of the irradiated body can be prevented. Furthermore, when the surface of the irradiated body is the affected area, irritation to the patient can be suppressed. In the plasma type treatment apparatus 100, the flow rate of the active gas discharged from the discharge port 1a can be adjusted by the amount of the plasma generating gas supplied to the tubular dielectric 3.

The active gas generated by the plasma treatment device 100 has an effect of promoting healing of trauma and abnormalities. By irradiating a cell, a living tissue or an individual organism with an active gas, the cleansing, activation, or healing of the irradiated portion can be promoted.

When irradiating an active gas for the purpose of promoting healing of trauma or abnormality, the irradiation frequency, the number of irradiations, and the irradiation period are not particularly limited. For example, when irradiating the affected area with an active gas at an irradiation amount of 1 to 5.0 L / min, irradiation conditions such as 1 to 5 times a day, 10 seconds to 10 minutes each time, and 1 to 30 days promote healing. It is preferable from the viewpoint of

The plasma-type treatment device 100 of the present embodiment is particularly useful as an oral treatment instrument and a dental treatment instrument. Further, the plasma type treatment device 100 of the present embodiment is also suitable as an instrument for animal treatment.

[Action effect]
According to the plasma type treatment apparatus 100 of the present embodiment as described above, by providing the above configuration, the distance between the discharge port 1a of the plasma or the active gas and the surface of the irradiated body H is maintained in the optimum range. , Plasma or active gas can be stably irradiated to the irradiated body H. Therefore, the plasma type treatment device 100 in which the temperature rise on the surface of the irradiated body H is suppressed and the effect of wound healing and the like is enhanced can be realized with a simple configuration and low cost.

[Other Embodiments]
The plasma-type treatment apparatus of the present invention includes a plasma generating unit, an irradiation device having a nozzle for discharging either one or both of plasma and active gas, and a guide body attached to the tip of the nozzle. It suffices, and is not limited to the above embodiment.

For example, the power supply unit (not shown) may be provided inside the housing 21 of the supply unit 20, but may be provided independently of the supply unit 20.
In the illustrated example, the control unit 90 is provided inside the housing 21 of the supply unit 20, but may be provided independently of the supply unit 20.
Further, in the illustrated example, the guide body 60 and the like are attached to the nozzle 1, but may be attached to the cowling 2, for example.

Further, the operation switch 9 may be different from the above embodiment. For example, instead of providing the operation switch 9 on the irradiation device 10, a foot pedal may be provided on the supply unit 20. In this case, it is possible to adopt a configuration in which the foot pedal is used as an operation unit and, for example, when the user steps on the foot pedal, the plasma generation gas is supplied from the supply source 70 to the plasma generation unit 12.

In the above embodiment, the shape of the internal electrode 4 is screw-shaped, but the shape of the internal electrode is not limited as long as plasma can be generated between the internal electrode and the external electrode.
The internal electrode may or may not have irregularities on the surface. The internal electrode preferably has a shape having irregularities on the outer peripheral surface.
The shape of the internal electrode may be, for example, a coil shape, or a rod shape or a tubular shape having a plurality of protrusions, holes, and through holes formed on the outer peripheral surface. Examples of the cross-sectional shape of the internal electrode include a circular shape such as a perfect circle and an ellipse, and a polygonal shape such as a quadrangle and a hexagon.

In addition, it is possible to replace the constituent elements in the above-described embodiment with well-known constituent elements as appropriate without departing from the spirit of the present invention, and the above-mentioned modified examples may be appropriately combined.

The plasma treatment apparatus of the present invention can further enhance the effect of plasma. Therefore, the plasma-type treatment device of the present invention is suitable as a medical treatment device or an animal treatment device other than humans.
The treatment method using the treatment device of the present invention is also effective in promoting healing of living tissues. The treatment method using the treatment device of the present invention is effective not only for the treatment of humans but also for the treatment of animals other than humans.

1 ... Nozzle 1a ... Discharge port 3 ... Tubular dielectric (plasma generator)
4 ... Internal electrode (plasma generator)
5 ... External electrode (plasma generator)
9 ... Operation switch 10 ... Irradiation device 12 ... Plasma generator 60, 61, 62, 63, 64, 65, 66, 67, 68 ... Guide body 60a, 62a, 63a, 64a, 65a, 66a, 67a, 68a ... Tip Unit 90 ... Control unit 100 ... Plasma treatment device (active gas irradiation device)
H ... Irradiated body

Claims (11)

An irradiation instrument including a plasma generating unit in which plasma is generated and a nozzle having a discharge port for discharging one or both of the plasma and the active gas generated by the plasma is provided.
Furthermore, Bei give a guide member for separating the irradiated body to the plasma or the active gas and the discharge port is irradiated,
The guide body has a cylindrical shape
The guide body has a horn shape in which at least a part in the length direction gradually increases in inner diameter toward the tip end side of the guide body.
The guide body is a plasma-type treatment device in which a portion having a horn shape is arranged with a plurality of tongue-shaped pieces separated from each other. The plasma treatment apparatus according to claim 1, wherein the guide body is attached to the nozzle. The plasma-type treatment device according to claim 1 or 2, wherein the guide body is bent in an L-shape in a plan view. The plasma-type treatment apparatus according to any one of claims 1 to 3, wherein the guide body has a variable length dimension at least in a part in the length direction. The plasma-type treatment device according to claim 4 , wherein the guide body is at least partially expandable and contractible in the length direction. The present invention according to any one of claims 1 to 5, wherein the plurality of tongue-shaped pieces are made of an elastic material, and the distance between the discharge port and the irradiated body is variable by deformation of the tongue-shaped pieces. The plasma therapy apparatus according to the description. The guide body, the tip portion is formed in the longitudinal sectional arc shape rounded, plasma treatment apparatus according to any one of claims 1 to 6. The plasma treatment apparatus according to any one of claims 1 to 7 , wherein the guide body includes a contact sensor that detects the presence or absence of contact with the irradiated body. The eighth aspect of the present invention further comprises a control unit that starts energization of the plasma generating unit when the detection signal of the contact sensor is input and the contact between the guide body and the irradiated body is detected. Plasma treatment device. The plasma-type treatment device according to claim 9 , wherein the control unit energizes the plasma generating unit only while the contact sensor detects contact between the guide body and the irradiated body. The control unit accumulates the contact time between the guide body and the irradiated body detected by the contact sensor, and compares the cumulative contact time with a preset scheduled irradiation time in advance. The plasma-type treatment apparatus according to claim 10 , wherein the plasma generating portion is energized only at the set scheduled irradiation time.

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