CN206761952U - An Atmospheric Pressure Flexible Cold Plasma Jet Endoscope Sterilization Device - Google Patents

Abstract

An atmospheric pressure flexible cold plasma jet endoscope sterilization device relates to the field of sterilization. The device includes that the pipe formula of mutual independence sterilizes regional and plasma electrode discharge region, the pipe formula is sterilized regional including the pipe that is used for placing the endoscope, for being used for the flexible cold plasma efflux of atmospheric pressure to endoscope submergence sterilization in the pipe, the pipe upper end is equipped with the exhaust hole, in the plasma electrode discharge region, the working gas of the flexible cold plasma efflux of atmospheric pressure is sent and let in cold plasma jet generator by the working gas source, the export connection pipe of cold plasma jet generator and its corresponding electrode connect high voltage power supply's output respectively. The device can change the size and the shape of the catheter, does not need to change an electrode structure, can realize the sterilization of the soft and hard endoscopes in different sizes, does not need complex vacuum equipment, has low cost and high efficiency, does not need chemical reagents, does not pollute the environment, and is a low-cost and high-efficiency green endoscope sterilization device.

Description

An Atmospheric Pressure Flexible Cold Plasma Jet Endoscope Sterilization Device

technical field

The utility model relates to the field of disinfection and sterilization in the medical industry, in particular to an atmospheric pressure flexible cold plasma jet endoscope sterilization device.

Background technique

Endoscope is an important medical device used to observe the lumen in human and animals, and has been clinically used in the diagnosis and treatment of many diseases. Before using the endoscope, it needs to be sterilized to prevent cross infection. A variety of methods have been used to sterilize endoscopes, such as high-temperature and high-pressure steam, ethylene oxide fumigation, glutaraldehyde immersion, and low-temperature plasma sterilization. Among them, the high temperature and high pressure steam sterilization temperature is relatively high, which is easy to cause thermal damage to the surface of the endoscope, and it is difficult to effectively inactivate some pathogenic microorganisms. The sterilization process of the ethylene oxide fumigation method requires a long period of ventilation, resulting in a long cycle time for the entire sterilization cycle. In addition, ethylene oxide is toxic, flammable and explosive. Once it remains or leaks, improper handling will cause safety accidents; therefore, there will be serious safety hazards in the use of ethylene oxide for sterilization. The glutaraldehyde soaking method generally needs to soak for more than ten hours, and the sterilization efficiency is low; and glutaraldehyde is strongly irritating, which may irritate the skin and mucous membranes, and cause human allergies; when the waste liquid is discharged, it will pollute the water body.

Low-temperature plasma sterilization uses active particles in the plasma to kill pathogenic microorganisms. It does not require chemical reagents during sterilization, has no pollution to the environment, has better treatment effects, higher efficiency, and less damage to the surface of the endoscope. An ideal method for sterilizing endoscopes. The literature (Zentralblatt fur Hygiene und Umweltmedizin 1993, 194 (4):380-391) provides a device and method for sterilizing endoscopes using hydrogen peroxide plasma, and the sterrad 100s endoscope sterilization system developed based on this It has been widely used all over the world. But this device and method need expensive and complicated vacuum equipment, the cost is higher, and in the actual treatment, it is necessary to evacuate first, inject hydrogen peroxide and then sterilize, so the sterilization efficiency will be reduced; in addition, this type of device is difficult to treat many Sterilize long or very thin endoscopes. There is no relevant report on the method of using a relatively simple structure sterilization device and low-cost gas to sterilize endoscopes. In addition, if the plasma electrode discharge area and the sterilization area can be separated, the temperature of the sterilization area can be reduced, and the size of the catheter can be easily changed to adapt to endoscopes of different sizes, but the above-mentioned endoscope sterilization device has not yet been able to accomplish.

Utility model content

In order to solve the above-mentioned technical problems in the prior art that the plasma electrode discharge area and the jet sterilization area cannot be separated, and the endoscope can not be sterilized in a short time under atmospheric pressure, the utility model proposes a simple structure, low cost Low atmospheric pressure flexible cold plasma jet endoscope sterilization device.

In order to achieve the above object, the technical solution adopted by the utility model is: an atmospheric pressure flexible cold plasma jet endoscope sterilization device, which is characterized in that it includes a catheter-type sterilization area and a plasma electrode discharge area that are independent of each other. The above-mentioned catheter-type sterilization area includes a catheter for placing an endoscope, and there is an atmospheric pressure flexible cold plasma jet for immersing and sterilizing the endoscope in the catheter, and an exhaust hole is provided at the upper end of the catheter. In the electrode discharge area, the working gas of the flexible cold plasma jet at atmospheric pressure is emitted from the working gas source and passes through the pressure reducing valve and the adjustable flow meter in turn, and then enters the cold plasma jet generator. The outlet of the cold plasma jet generator is connected to the conduit , the corresponding electrodes of the cold plasma jet generator are respectively connected to the output terminals of the high-voltage power supply.

The outlet diameter of the cold plasma jet generator is 2-6mm, and the discharge form of the corresponding electrode includes one of bare electrode type, dielectric barrier type, and hollow cathode type.

The high-voltage power supply includes one of a high-voltage direct current power supply, a high-voltage radio frequency power supply, a microwave power supply, a high-voltage low-frequency alternating current power supply, and a high-voltage pulse power supply, and the output voltage is 0-10kV.

The material of the catheter includes polytetrafluoroethylene, PMMA (polymethyl methacrylate), quartz glass, silicate glass, PC (polycarbonate), PEEK (polyether ether ketone), PI (polyimide ), TPU (thermoplastic polyurethane elastomer rubber), the part used to place the endoscope is a horizontal or vertical or curved circular tube structure, and the length of the circular tube structure is 20-1500mm, The diameter is 2-20mm.

The horizontal circular tube structure and the vertical circular tube structure are straight circular tube structures arranged horizontally and vertically respectively, and are suitable for sterilizing rigid endoscopes.

The curved circular tube structure is a vertically arranged circular tube structure with a wavy arc, which is suitable for sterilizing flexible endoscopes.

The radius of the circle corresponding to the radian of the wave is 20-200 mm, and the central angle is 30-90 degrees.

The working gas is one or a mixture of nitrogen, oxygen, argon, helium, and air.

The utility model is beneficial in that:

(1) The flexible cold plasma jet contains a large number of active particles such as high-speed electrons, ions, strong oxidizing atoms, excited molecules and free radicals, which have high chemical activity and can oxidize the protein chains in microorganisms in a short time. Amino sugar, kills microorganisms, achieves no chemical reagents, high-efficiency sterilization;

(2) This device can be sterilized by using different working gases. If necessary, you can choose relatively low oxidizing gases such as nitrogen, helium, etc. to avoid aging of endoscope rubber during the sterilization process;

(3) There is a certain distance between the flexible cold plasma jet sterilization area of the submerged endoscope and its plasma electrode discharge area, and its macroscopic temperature is as low as room temperature, which will not cause thermal damage to the endoscope;

(4) This device can sterilize soft and hard endoscopes of different sizes by changing the size and shape of the catheter without changing the electrode and discharge area structure;

(5) This device does not require complicated vacuum equipment, and can be sterilized by nitrogen gas. The cost is relatively low, the operation is simple and flexible, and there is no pollution to the environment. It is a low-cost, high-efficiency green sterilization device.

Description of drawings

Figure 1 is a schematic diagram of an atmospheric pressure flexible cold plasma jet endoscope sterilization device for sterilizing rigid endoscopes (catheter horizontal).

Fig. 2 is a schematic diagram of an atmospheric pressure flexible cold plasma jet endoscope sterilization device for sterilizing rigid endoscopes (catheter vertical).

Fig. 3 is a schematic diagram of an atmospheric pressure flexible cold plasma jet endoscope sterilization device for sterilizing a soft endoscope (catheter bending type).

In the figure: 1-working gas source; 2-pressure reducing valve; 3-adjustable flow meter; 4-cool plasma jet generator; 5-high voltage power supply; 6-catheter; 7-endoscope; 8-flexible cold Plasma jet; 9 - exhaust hole.

detailed description

The utility model is described in detail below in conjunction with accompanying drawing, but the utility model is not limited to specific embodiment.

Example 1

As shown in Figure 1, an atmospheric pressure flexible cold plasma jet endoscope sterilization device includes a duct-type sterilization area and a plasma electrode discharge area that are independent of each other. The conduit 6 of the mirror 7, there is an atmospheric pressure flexible cold plasma jet 8 for submerging and sterilizing the endoscope 7 in the conduit 6, the upper end of the conduit 6 is provided with an exhaust hole 9, in the plasma electrode discharge area, The working gas of the atmospheric pressure flexible cold plasma jet 8 is emitted from the working gas source 1 and passes through the pressure reducing valve 2 and the adjustable flow meter 3 in sequence, and then enters the cold plasma jet generator 4, and the outlet of the cold plasma jet generator 4 is connected to The conduit 6 and the corresponding electrodes of the cold plasma jet generator 4 are respectively connected to the output end of the high voltage power supply 5 .

The outlet diameter of the cold plasma jet generator 4 is 4mm, and the discharge form of the corresponding electrode is bare electrode type.

The high-voltage power supply 5 is a high-voltage low-frequency AC power supply with a frequency of 30kHz-100kHz, an output voltage of 0-10kV, and a maximum power of 150W.

The material of the catheter 6 is plexiglass, and the part for placing the endoscope 7 is a horizontal circular tube structure, and the horizontal circular tube structure is a straight circular tube structure arranged horizontally. The length is 320mm and the diameter is 10mm.

The method for sterilizing the endoscope by using the above-mentioned device: in this embodiment, the endoscope is a cystoscope with a length of 305 mm and a diameter of 4 mm, which is a hard endoscope, and the working gas is a high-purity gas with a purity of 99.999%. Nitrogen, the specific steps are as follows:

Step 1: Connect the various parts of the device as described in Example 1:

Step 2: Slowly insert the endoscope 7 to be sterilized into the catheter 6;

Step 3: Open the pressure reducing valve 2, adjust the adjustable flow meter 3 to 20 L/min, and smoothly pass nitrogen gas into the cold plasma jet generator 4, which uses bare electrode discharge. The plasma jet generated in the form of discharge will not cause breakdown discharge with conductors such as metals, and the macroscopic temperature is room temperature, so there is no special requirement for the insulation and heat resistance of the catheter 6, endoscope 7, etc.;

Step 4: Turn on the high-voltage power supply 5, adjust the output frequency to 60.0 kHz, generate atmospheric pressure flexible cold plasma jet 8 in the cold plasma jet generator 4, and gradually increase the output voltage from zero until the flexible cold plasma jet 8 fills the conduit 6, and discharged through the exhaust hole 9. At this time, the endoscope 7 is completely immersed in the atmospheric pressure flexible cold plasma jet 8 to realize sterilization. The results proved that after 1 min of sterilization, most of the bacteria were killed, and the sterilization effect was remarkable.

Example 2

As shown in Figure 2, an atmospheric pressure flexible cold plasma jet endoscope sterilization device includes a duct-type sterilization area and a plasma electrode discharge area that are independent of each other. The conduit 6 of the mirror 7, there is an atmospheric pressure flexible cold plasma jet 8 for submerging and sterilizing the endoscope 7 in the conduit 6, the upper end of the conduit 6 is provided with an exhaust hole 9, in the plasma electrode discharge area, The working gas of the atmospheric pressure flexible cold plasma jet 8 is emitted from the working gas source 1 and passes through the pressure reducing valve 2 and the adjustable flow meter 3 in sequence, and then enters the cold plasma jet generator 4, and the outlet of the cold plasma jet generator 4 is connected to The conduit 6 and the corresponding electrodes of the cold plasma jet generator 4 are respectively connected to the output end of the high voltage power supply 5 .

The outlet diameter of the cold plasma jet generator 4 is 2mm, and the discharge form of the corresponding electrodes is a dielectric barrier type.

The high-voltage power supply 5 is a high-voltage radio frequency power supply with a frequency of 2MHz-41MHz, an output voltage of 0-10kV, and a maximum power of 500W.

The material of the catheter 6 is quartz glass, and the part for placing the endoscope 7 is a vertical circular tube structure, and the vertical circular tube structure is a vertically arranged straight circular tube structure, and the circular tube structure The length is 200mm and the diameter is 6mm.

The method for sterilizing the endoscope by using the above-mentioned device: in this embodiment, the endoscope is a sinus mirror with a length of 180 mm and a diameter of 2.7 mm. Pure helium, the specific steps are as follows:

Step 1: Connect the various parts of the device as described in Example 3:

Step 2: Slowly insert the endoscope 7 to be sterilized into the catheter 6;

Step 3: Open the pressure reducing valve 2, adjust the adjustable flow meter 3 to 12 L/min, and smoothly pass the helium gas into the cold plasma jet generator 4. The cold plasma jet generator 4 uses a dielectric barrier discharge form, The concentration of plasma active particles generated by this discharge form is higher, and the sterilization efficiency is also higher;

Step 4: Turn on the high-voltage power supply 5, adjust the output frequency to 13.56MHz, generate the atmospheric pressure flexible cold plasma jet 8 in the cold plasma jet generator 4, and gradually increase the output voltage from zero until the atmospheric pressure flexible cold plasma jet 8 is full The catheter 6 is discharged through the exhaust hole 9. At this time, the endoscope 7 is completely immersed in the atmospheric pressure flexible cold plasma jet 8, and the sterilization effect similar to that in Example 1 is achieved.

Example 3

As shown in Figure 3, an atmospheric pressure flexible cold plasma jet endoscope sterilization device includes a duct-type sterilization area and a plasma electrode discharge area that are independent of each other. The conduit 6 of the mirror 7, there is an atmospheric pressure flexible cold plasma jet 8 for submerging and sterilizing the endoscope 7 in the conduit 6, the upper end of the conduit 6 is provided with an exhaust hole 9, in the plasma electrode discharge area, The working gas of the atmospheric pressure flexible cold plasma jet 8 is emitted from the working gas source 1 and passes through the pressure reducing valve 2 and the adjustable flow meter 3 in sequence, and then enters the cold plasma jet generator 4, and the outlet of the cold plasma jet generator 4 is connected to The conduit 6 and the corresponding electrodes of the cold plasma jet generator 4 are respectively connected to the output end of the high voltage power supply 5 .

The exit diameter of the cold plasma jet generator 4 is 6 mm, and the discharge form of the corresponding electrode is a hollow cathode type.

The high-voltage power supply 5 is a microwave power supply with a frequency of 500MHz-5GHz, an output voltage of 0-10kV, and a maximum power of 150W.

The material of the catheter 6 is polytetrafluoroethylene, and the part used to place the endoscope 7 is a curved circular tube structure, and the curved circular tube structure is a circular tube arranged vertically with a wavy arc. structure, the radius of the circle corresponding to the wave-shaped radian is 100mm, the central angle is 45 degrees, the length of the circular tube structure is 1500mm, and the diameter is 20mm.

The method for sterilizing the endoscope by using the above-mentioned device: in the present embodiment, the endoscope is a gastroscope with a working length of 1100 mm and a diameter of 5.9 mm. It is a soft endoscope, and the working gas is helium and oxygen. The mixed gas, wherein the mass fraction of oxygen is 1.5%, the specific steps are as follows:

Step 1: Connect the various parts of the device as described in Example 5:

Step 2: Slowly insert the endoscope 7 to be sterilized into the catheter 6;

Step 3: Open the pressure reducing valve 2, adjust the adjustable flow meter 3 to 35 L/min, and smoothly pass the mixed gas into the cold plasma jet generator 4. The cold plasma jet generator 4 uses a hollow cathode discharge form, The discharge form is glow discharge, which has a higher particle density;

Step 4: Turn on the high-voltage power supply 5, adjust the output frequency to 2.4 GHz, generate the atmospheric pressure flexible cold plasma jet 8 in the cold plasma jet generator 4, and gradually increase the output voltage from zero until the atmospheric pressure flexible cold plasma jet 8 is full The conduit 6 is discharged through the exhaust hole 9. At this time, the endoscope 7 is completely submerged in the flexible cold plasma jet 8 at atmospheric pressure to achieve a sterilization effect similar to that in Embodiments 1 and 2.

Claims (6)

1. An atmospheric pressure flexible cold plasma jet endoscope sterilization device is characterized in that it comprises a conduit type sterilization area and a plasma electrode discharge area which are independent of each other, and the conduit type sterilization area includes a The conduit (6) of the mirror (7), in which there is an atmospheric pressure flexible cold plasma jet (8) for submerging and sterilizing the endoscope (7), and the upper end of the conduit (6) is provided with an exhaust hole (9), in the plasma electrode discharge area, the working gas of the atmospheric pressure flexible cold plasma jet (8) is emitted from the working gas source (1) and passes through the pressure reducing valve (2) and the adjustable flow meter (3) in sequence ) into the cold plasma jet generator (4), the outlet of the cold plasma jet generator (4) is connected to the conduit (6), and the corresponding electrodes of the cold plasma jet generator (4) are respectively connected to the high voltage power supply (5) output terminal. 2. An atmospheric pressure flexible cold plasma jet endoscope sterilization device according to claim 1, characterized in that the outlet diameter of the cold plasma jet generator (4) is 2-6 mm, and the corresponding electrode The discharge form includes one of bare electrode type, dielectric barrier type, and hollow cathode type. 3. The atmospheric pressure flexible cold plasma jet endoscope sterilization device according to claim 1, characterized in that the high-voltage power supply (5) includes a high-voltage DC power supply, a high-voltage radio frequency power supply, a microwave power supply, a high-voltage low-frequency AC power supply, One of the power supply and high-voltage pulse power supply, the output voltage is 0-10kV. 4. The atmospheric pressure flexible cold plasma jet endoscope sterilization device according to claim 1, wherein the material of the catheter (6) includes polytetrafluoroethylene, polymethyl methacrylate, quartz One of glass, silicate glass, polycarbonate, polyether ether ketone, polyimide, thermoplastic polyurethane elastomer rubber, the part used to place the endoscope is horizontal or vertical or curved A circular tube structure, the length of the circular tube structure is 20-1500mm, and the diameter is 2-20mm. 5. a kind of atmospheric pressure flexible cold plasma jet endoscope sterilization device according to claim 4, is characterized in that, described horizontal circular pipe structure, vertical circular pipe structure are respectively horizontal, vertically arranged straight Round tube structure, suitable for sterilizing rigid endoscopes. 6. A kind of atmospheric pressure flexible cold plasma jet endoscope sterilization device according to claim 4, characterized in that, the curved circular tube structure is a vertically arranged circular tube structure with a wavy arc, Suitable for sterilizing flexible endoscopes.