WO2018190317A1 - 滅菌方法及び滅菌装置 - Google Patents
滅菌方法及び滅菌装置 Download PDFInfo
- Publication number
- WO2018190317A1 WO2018190317A1 PCT/JP2018/014990 JP2018014990W WO2018190317A1 WO 2018190317 A1 WO2018190317 A1 WO 2018190317A1 JP 2018014990 W JP2018014990 W JP 2018014990W WO 2018190317 A1 WO2018190317 A1 WO 2018190317A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- sterilization
- pressure
- passage
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/22—Phase substances, e.g. smokes, aerosols or sprayed or atomised substances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/20—Gaseous substances, e.g. vapours
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/18—Liquid substances or solutions comprising solids or dissolved gases
- A61L2/186—Peroxide solutions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/20—Gaseous substances, e.g. vapours
- A61L2/208—Hydrogen peroxide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
-
- A61L2103/15—
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/12—Apparatus for isolating biocidal substances from the environment
- A61L2202/122—Chambers for sterilisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/12—Apparatus for isolating biocidal substances from the environment
- A61L2202/123—Connecting means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/15—Biocide distribution means, e.g. nozzles, pumps, manifolds, fans, baffles, sprayers
Definitions
- the present invention relates to a sterilization method and a sterilization apparatus.
- a sterilization method that can satisfy such a requirement, a method has been proposed in which a sterilization gas is generated by injecting a sterilization agent into a decompressed environment, and a sterilization target in a reduced pressure environment is sterilized with the sterilization gas. According to the sterilization method, sterilization can be performed to every corner of the thin hollow tube regardless of the high temperature.
- Patent Document 1 Japanese Patent No. 2780228
- Patent Document 2 Japanese Patent No. 4526649
- the present invention aims to solve such a problem of corrosion.
- An embodiment of the sterilization apparatus is: A sterilization chamber; A vaporization chamber; A wall that partitions the vaporization chamber into a first chamber and a second chamber; A first passage connecting the first room and the second room; A table disposed in the first room; A nozzle arranged toward the table and spraying the sterilizing agent toward the table; A liquid reservoir for storing a liquid component of the sterilant sprayed toward the table; A second passage connecting the second chamber and the sterilization chamber; Means for depressurizing the sterilization chamber and depressurizing the first chamber and the second chamber of the vaporization chamber via the first passage and the second passage;
- the first passage is formed by a strip-shaped gap having a small thickness and a wide width.
- the wall has a partition wall rising from the bottom of the vaporization chamber; A belt-like gap is formed between the upper end surface of the partition wall and the ceiling surface of the vaporization chamber.
- the wall has a first wall rising from the bottom of the vaporization chamber and a second wall depending from the ceiling of the vaporization chamber;
- the band-shaped gap is formed between the first wall and the second wall.
- a sterilization apparatus according to another embodiment of the present invention, A tray is disposed below the end of the second passage connected to the sterilization chamber.
- the sterilizing gas moving from the first room to the second room comes into contact with the belt-like wall. Therefore, liquid components (particularly phosphoric acid and sulfuric acid having a high boiling point) contained in the sterilization gas are captured by contact with the wall and are not transported to the sterilization chamber.
- FIG. 1 It is a figure which shows schematic structure of the sterilizer based on this invention. It is a figure which shows the relationship between the pressure of a sterilization chamber, and time explaining the operation
- FIG. 1 schematically shows the overall configuration of a sterilization apparatus according to an embodiment of the present invention.
- the sterilizer 1 includes a housing 10 for forming a sterilization chamber described later.
- the housing 10 has an outer container 11.
- the outer container 11 is formed by processing a conductive metal (for example, aluminum) plate, for example, and includes a sealed chamber (hereinafter referred to as “sterilization chamber”) 12 inside thereof. Although not shown, the outer container 11 is provided with a container main body and a lid for putting the sterilization object 2 into and out of the sterilization chamber 12.
- a conductive metal for example, aluminum
- sterilization chamber a sealed chamber
- the sterilization container 10 includes a sterilization gas supply device (supply means) 20 that supplies sterilization gas to the sterilization chamber 12, a vacuum device (decompression means) 30 that introduces vacuum into the sterilization chamber 12, and the sterilization gas in the sterilization chamber 12 to the atmosphere.
- a ventilation device 40 is connected.
- the sterilization gas supply device 20 includes a storage unit 21 that stores liquid sterilant, a measurement unit (measurement chamber) 22 that measures the sterilant supplied from the storage unit 21, and a predetermined amount measured by the measurement unit 22.
- a vaporizing section (vaporizing chamber) 23 for vaporizing the sterilizing agent a passage (sterilizing agent supply passage) 24 connecting the accommodating section 21 and the measuring section 22, and a passage connecting the measuring section 22 and the vaporizing section 23 (sterilizing agent) Supply passage)
- a passage (sterilization gas supply passage) 26 connecting the vaporizing section 23 and the sterilization chamber 12, a valve 27 provided in the passage 24 to open and close the passage 24, and a passage 27 provided in the passage 25.
- 25 has a valve 28 for opening and closing 25.
- sterilization gas supply device 20 The configuration of the sterilization gas supply device 20 will be described later.
- Various liquid sterilizing agents can be used as the sterilizing agent.
- hydrogen peroxide and peracetic acid are suitable.
- peracetic acid is often present in the form of an equilibrium mixture of peracetic acid, acetic acid, hydrogen peroxide, and water.
- the vacuum device 30 includes a vacuum pump 31, a passage (exhaust passage) 31 connecting the vacuum pump 31 and the sterilization chamber 12, and a valve 33 provided in the passage 31 to open and close the passage 31.
- the ventilator 40 includes a passage (ventilation passage) 41 that connects the sterilization chamber 12 to the atmosphere, and a valve 42 that is provided in the passage 41 and opens and closes the passage 41.
- a pressure detector 50 that detects the pressure in the sterilization chamber 12 is disposed inside the outer container 11.
- the pressure detector 50 may be composed of one or a plurality of pressure gauges. When using a plurality of pressure gauges, for example, a range from atmospheric pressure to 10,000 Pascal is measured with one pressure gauge, and a range from 13,000 Pascals to 0 Pascal is measured with another pressure gauge.
- the metering unit 22, the valves 27 and 28, the vacuum pump 31, the valve 33, the valve 42, and the pressure detector 50 are connected to the control device 60.
- a plasma generation device 70 that generates plasma in the sterilization chamber 12 is provided.
- the plasma generating apparatus 70 has an inner container 71 disposed inside the outer container 11.
- the inner container 71 is formed, for example, by processing a porous plate (for example, punching metal) made of a conductive metal (for example, aluminum) to form a room 72 (a part of the sterilization chamber 12) for accommodating the sterilization target 2 therein. ing.
- the inner container 71 includes a container main body and a lid in order to put the sterilization target 2 in and out of the room 72.
- a spacer made of an electrically insulating material is disposed between the outer container 11 and the inner container 71, whereby the outer container 11 and the inner container 71 are electrically insulated.
- the inner container 71 is electrically connected to the outer container 11 via a circuit 74 having a high frequency power source 73.
- the high frequency power source 73 is connected to the control device 60.
- An insulating sleeve 75 is disposed at a location where the circuit 74 penetrates the outer container 11, whereby the circuit 74 and the outer container 11 are electrically insulated.
- a sterilization process performed by the sterilizer 1 will be described with reference to FIGS.
- the sterilization process described below includes a preparation process, a first sterilization process, a second sterilization process, a sterilization gas decomposition process, and a ventilation process.
- the sterilization target 2 is a medical device such as an endoscope or an elongated tube for an endoscope.
- the lid of the inner container 71 and the lid of the outer container 11 are closed, and the sterilization chamber 12 is sealed.
- Step # 1 The control device 60 closes the valves 27, 28, 33, and 42 of the sterilization gas supply device 20, the vacuum device 30, and the ventilation device 40, and turns off the high-frequency power source 73 of the plasma generation device 70. Further, the control device 60 initializes data stored in a storage unit (not shown) of the control device 60 (step # 1). Specifically, t1 to t3 and n1 to n4 described later are reset to “0”, and N1 to N3 are set to “2”, “6”, and “10”, respectively.
- Step # 2 The control device 60 drives the vacuum pump 31 of the vacuum device 30 and opens the valve 33 to decompress the sterilization chamber 12 (step # 2). Thereby, the pressure in the sterilization chamber 12 gradually decreases from the atmospheric pressure.
- Step # 3 During decompression, the control device 60 determines whether or not the pressure P in the sterilization chamber 12 has reached a predetermined pressure P1 (for example, 120 Pascals) based on the output of the pressure detector 50 (step # 3).
- a predetermined pressure P1 for example, 120 Pascals
- Step # 4 When it is detected that the pressure P in the decompression chamber 12 has reached the pressure P1, the control device 60 turns on the high-frequency power source 73 of the plasma generation device 70 (step # 4). Thereby, plasma is generated between the outer container 11 and the inner container 71, and the atmosphere of the sterilization chamber 12 is warmed to an appropriate temperature.
- Step # 5, # 6 The control device 60 determines whether or not the pressure P in the sterilization chamber 12 has reached a predetermined pressure P2 (for example, 65 Pascals) based on the output of the pressure detector 50 (step # 5). When the pressure reaches a predetermined pressure P2, the valve 33 of the vacuum device 30 is closed (step # 6). Actually, since the pressure may slightly increase after the valve 33 is closed, it is preferable to maintain the pressure in the sterilization chamber 12 at a predetermined pressure P2 while opening and closing the valve 33. As described above, since the sterilization chamber 12 and the vaporization unit 23 communicate with each other via the passage 26, the negative pressure introduced into the sterilization chamber 12 is also introduced into the vaporization unit 23, and the pressure of the vaporization unit 23 is also a predetermined value. The pressure is set to P2.
- a predetermined pressure P2 for example, 65 Pascals
- n1 is set to “0” during the first sterilization step
- n1 is set to “1” during the second sterilization step
- n1 is set to “2” when the second sterilization step is completed. Is done. Therefore, during the first sterilization process and the second sterilization process, the control device 60 executes steps # 9A to # 10A, and after the second sterilization process is completed, the control device 60 executes steps # 9B to # 10B.
- Step # 9A, 10A The control device 60 determines whether or not the count time of the timer t1 has reached T1 (for example, 1 minute) (step # 9A), and turns off the high-frequency power source 73 when the count time of the timer t1 reaches T1 (step 10A). ) Stop plasma generation.
- Step # 11 The control device 60 prepares a predetermined amount (for example, 1 milliliter) of sterilizing agent by measuring the sterilizing agent supplied from the sterilizing agent storage unit 21 in the measuring unit (measuring chamber) 22. Specifically, the control device 60 opens the closed valve 28 to depressurize the metering unit 22, and closes the valve 28 after a predetermined time to keep the metering unit 22 in a negative pressure environment. Subsequently, the control device 60 opens the valve 27. Thereby, a predetermined amount (for example, 1 milliliter) of the sterilizing agent is supplied from the storage unit 21 to the measuring unit 22. When the supply of the sterilant is completed, the control device 60 closes the valve 27.
- a predetermined amount for example, 1 milliliter
- Step # 12 The control device 60 opens the valve 28 of the sterilization gas supply device 20.
- the vaporizing unit 23 is set to a negative pressure (for example, 65 Pascals), and the total volume of the vaporizing unit 23 and the sterilization chamber 12 is much larger than the volume of the measuring unit 22. Since it is large, a predetermined amount (1 milliliter) of sterilizing agent prepared in the measuring unit 22 is sprayed on the vaporizing unit 23. As is well known, since the boiling point of a sterilant under a negative pressure is low, the sprayed sterilant is instantly vaporized into a sterilized gas.
- a negative pressure for example, 65 Pascals
- Step # 13 When one spray is completed, the control device 60 adds “1” to the counter n2 of the number of sprays (step # 13). The count counter n2 is set to “0” in the initialization step # 1.
- Steps # 14 to # 15 The control device 60 starts the timer t2 (step # 14), determines whether or not the count time of the timer t2 has reached T2 (for example, 80 seconds) (step # 15), and the count time of the timer t2 is T2 Is reached, the valve 28 is closed (step # 16). As described above, negative pressure is introduced into the metering unit 22 by opening the valve 28. Therefore, when the valve 27 is opened later, a predetermined amount of sterilizing agent is sucked from the storage portion 21 into the measuring portion 22.
- Step # 17 The control device 60 determines whether or not the value of the spray count counter n2 has reached N2 (step # 17). If n2 is less than N2, the control device 60 performs the processing from steps # 11 to # 16. Execute. For example, in the embodiment, N2 is set to “6” in the initialization step # 1. Therefore, as shown in FIG. 2, in the embodiment, the measurement, spraying, and vaporization of a small amount (for example, 1 milliliter) of the sterilizing agent are repeated a plurality of times, and the pressure in the sterilization chamber 12 increases stepwise and continuously. . As a result, even in a medical device such as an elongated tube, the sterilization gas repeatedly enters the narrow internal space and is sterilized to the end.
- a small amount for example, 1 milliliter
- the valve 28 is closed while the metering section 2 is kept in a reduced pressure state, and the residual sterilant in the passage 24 is metered. It is preferable to introduce the residual sterilizing agent into the vaporizing unit 23 by introducing it into the unit 22 and opening the valve 28 again. Thereby, the channel
- Steps # 18 to # 19 When the above repeated sterilization processes are completed, the control device 60 opens the valve 42 of the ventilation device 40 and introduces the atmosphere into the sterilization chamber 12. Further, the control device 60 determines whether or not the pressure P in the sterilization chamber 12 has reached a predetermined pressure P3 (for example, 50,000 Pascals) based on the output of the pressure detector 50 (step # 19). . When the pressure P in the sterilization chamber 12 reaches P3, the control device 60 closes the valve 42 (step # 20).
- a predetermined pressure P3 for example, 50,000 Pascals
- Steps # 21 to # 22 The control device 60 starts the timer t3 (step # 21) and waits until the count time of the timer t3 reaches T3 (for example, 2 minutes) (step # 22).
- Step # 23 to # 24 When entering the second sterilization step 102 (see FIG. 2), the control device 60 drives the vacuum pump 31 of the vacuum device 30 and opens the valve 33 to decompress the sterilization chamber 12 (step # 23). Next, the control device 60 determines whether or not the pressure P in the sterilization chamber 12 has reached a predetermined pressure P4 (for example, 6,500 Pascals) based on the output of the pressure detector 50 (step # 24). ).
- a predetermined pressure P4 for example, 6,500 Pascals
- the decompression rate in steps # 23 to # 24 may be the same as the decompression rate in steps # 2 to # 3.
- the pressure reduction rate can be adjusted by adjusting the opening of the valve 33, for example.
- Step # 25 When the pressure in the sterilization chamber 12 reaches P4, the control device 60 adds “1” to the counter n1 (step # 25). Therefore, the counter n1 set to “0” in the initialization step # 1 is updated to “1” here.
- Steps # 2 to # 22 Next, the control device 60 returns to Step # 2 and executes Steps # 2 to # 22 described above. At this time, since the counter n1 is “1” as described above, it is determined in step # 8 that n1 ⁇ N1 during the second sterilization step, and steps 9A to 10A are executed.
- step # 23 the control device 60 drives the vacuum pump 31 of the vacuum device 30 and opens the valve 33 to decompress the sterilization chamber 12 (step # 23).
- the control device 60 determines whether or not the pressure P in the sterilization chamber 12 has reached a predetermined pressure P4 (for example, 6,500 Pascals) based on the output of the pressure detector 50 (step # 24). ).
- a predetermined pressure P4 for example, 6,500 Pascals
- the decompression rate in steps # 23 to # 24 may be the same as the decompression rate in steps # 2 to # 3.
- Step # 25 When the pressure in the sterilization chamber 12 reaches P4, the control device 60 adds “1” to the counter n1 (step # 25). Therefore, the counter n1 set to “1” after the end of the first sterilization step is reset to “2” here.
- Steps # 2 to # 7 Next, the control device 60 returns to Step # 2 and executes Steps # 2 to # 7 described above.
- T1 ′ for example, 5 minutes
- the decomposition step 103 plasma is generated over a long time (for example, 5 minutes).
- the sterilizing agent for example, hydrogen peroxide, peracetic acid
- adhering to the inner surface of the sterilization chamber 12, the inner container 71, and the sterilization target 2 is decomposed into water and carbon dioxide to be non-brominated.
- Step # 26 Next, the control device 60 opens the valve 42 of the ventilation device 40 to introduce the atmosphere into the sterilization chamber 12. Further, the control device 60 determines that the pressure P in the sterilization chamber 12 reaches a predetermined pressure P5 (for example, atmospheric pressure (1,0013,000 Pascal) or almost atmospheric pressure) based on the output of the pressure detector 50. (Step # 27). When the pressure P in the sterilization chamber 12 reaches P5, the control device 60 closes the valve 42 (step # 28).
- a predetermined pressure P5 for example, atmospheric pressure (1,0013,000 Pascal
- P5 for example, atmospheric pressure (1,0013,000 Pascal
- the control device 60 closes the valve 42 (step # 28).
- the control device 60 drives the vacuum pump 31 of the vacuum device 30 and opens the valve 33 to decompress the sterilization chamber 12 (step # 29).
- the control device 60 determines whether or not the pressure P in the sterilization chamber 12 has reached a predetermined pressure P6 (for example, 30,000 Pascals) based on the output of the pressure detector 50 (step # 30). ).
- Step # 31 When the pressure in the sterilization chamber 12 reaches P6, the control device 60 closes the valve 33 (step # 31).
- Steps # 32 to # 34 Next, the control device 60 opens the valve 42 of the ventilation device 40 to introduce the atmosphere into the sterilization chamber 12. Further, the control device 60 determines that the pressure P in the sterilization chamber 12 reaches a predetermined pressure P5 (for example, atmospheric pressure (1,0013,000 Pascal) or almost atmospheric pressure) based on the output of the pressure detector 50. (Step # 33). When the pressure P in the sterilization chamber 12 reaches P5, the control device 60 closes the valve 42 (step # 34).
- a predetermined pressure P5 for example, atmospheric pressure (1,0013,000 Pascal
- P5 for example, atmospheric pressure (1,0013,000 Pascal
- the control device 60 closes the valve 42 (step # 34).
- Step # 35 Subsequently, the control device 60 adds “1” to the counter n3 (step # 35) and determines whether or not the value of the added counter n3 is equal to N3. If n3 ⁇ N3, steps # 29 to ## are performed. Repeat 36.
- the counter n3 is set to “0” in the initialization step # 1, and “1” is added every time one ventilation process (steps # 29 to # 34) is completed.
- N3 is set to “10” in the initialization step # 1. Therefore, in the embodiment, the control device 60 repeats the ventilation process eight times.
- the atmosphere in the sterilization chamber 12 is satisfactorily replaced as a result of repeated depressurization and pressurization multiple times.
- FIG. 6 shows a configuration of the sterilization gas supply device 20.
- the sterilization gas supply device 20 includes the storage unit 21, the measurement unit 22, and the vaporization unit 23.
- the vaporization unit 23 includes a container 201.
- the container 201 includes a container body 202 having an upper opening and an upper lid 203 that closes the upper opening of the container body 202.
- the container body 202 has a partition wall 204 extending upward from the bottom thereof, and the internal space (vaporization chamber) 205 of the container body 202 is divided into two rooms (a first room 206 and a second room 207).
- the height of the partition wall 204 is determined such that a gap 210 of about 1 mm is formed between the upper end surface 208 of the partition wall 204 and the lower surface (ceiling surface) 209 of the lid 203.
- a hanging wall 213 extending downward from the lower surface 209 along the left and right wall surfaces (the wall surface 211 in contact with the first room 206 and the wall surface 212 in contact with the second room 207) of the partition wall 204. 214 is formed. Between the hanging walls 213 and 214 and the wall surfaces 211 and 212 of the partition wall 204 adjacent thereto, gaps 215 and 216 of about 1 mm are formed, respectively.
- a sterilizing agent spray nozzle 220 is detachably connected to the lid portion 217 adjacent to the first chamber 206.
- the nozzle 220 includes the sterilant supply passage 25 and the valve 28 described above, and is fixed with the injection port 221 of the nozzle 220 facing downward.
- a table 222 is disposed below the injection port 221.
- the upper surface 223 of the table 222 is inclined.
- a liquid reservoir 224 is formed on the side of the table 222.
- a pipe (passage) 226 that penetrates the bottom portion 225 is provided in the bottom portion 225 of the container body 202 adjacent to the second chamber 207.
- the inner diameter of the pipe 226 is considerably larger than the size of the gaps 210, 215, and 216, for example, about 10 mm.
- the pipe 226 is surrounded by the protective cylinder 230.
- the protective cylinder 230 is fixed to the pipe 231 extending downward from the bottom portion 225 of the container body 202, the pipe 233 extending upward from the ceiling wall 232 of the outer container 11 forming the sterilization chamber 12, and the ends of the pipes 231 and 233.
- the flanges 234 and 235 are connected to each other by bolts and nuts, and the gasket 236 seals between the flanges 234 and 235.
- These members, including the container 201 and the parts (partition wall 204, hanging wall 217, table 222) disposed therein, are preferably made of a metal having excellent corrosion resistance, such as stainless steel.
- a tray 240 may be disposed below the outlet of the pipe 226 located in the sterilization chamber 12, and liquid components contained in the sterilization gas may be captured there.
- the vaporization unit 20 is placed in a room temperature environment (for example, 27 degrees Celsius), and the inside of the vaporization chamber 205 is set to a negative pressure.
- the main component (for example, hydrogen peroxide) of the sterilizing agent sprayed from the ejection port 221 to the first chamber 206 is almost vaporized.
- the components of the catalyst having a relatively high boiling point (for example, phosphoric acid and sulfuric acid) contained in the sterilizing agent collide with the inclined upper surface 223 of the table 222 disposed below the nozzle injection port 221, and then the inclined upper surface 223. It flows down along and is collected in the liquid reservoir 224.
- the vaporized sterilization gas moves from the first room 206 to the second room 207 through a narrow passage formed by the gaps 210, 215 and 216.
- aseptic gas enters the sterilization chamber 12 from the second chamber 207 through the pipe 226.
- the sterilant droplet that has entered the second chamber 207 falls on the bottom of the second chamber 207.
- the passage connecting the first room 206 and the second room 207 is formed by the narrow gaps 210, 215, and 216 having a small thickness and a wide width.
- the sterilizing gas moving to the room 207 comes into contact with the large-area wall surfaces (the partition wall 204, the drooping walls 213 and 214, and the lid lower surface 209). Therefore, liquid components (particularly phosphoric acid and sulfuric acid having a high boiling point) contained in the sterilization gas are captured by contact with these wall surfaces and are not transported to the sterilization chamber 12.
- Test 1 The sterilization efficiency of the sterilizer according to the embodiment of the present invention was evaluated by a test (Comparative Example, Examples 1 and 2).
- the test piece used for each test is a tube made of polytetrafluoroethylene (PTFE) having an inner diameter of 1 mm and a length of 1000 mm. One end of the tube was opened, and the other end was closed by applying a biological indicator.
- PTFE polytetrafluoroethylene
- Comparative example In the comparative example, 20 sterilization objects were accommodated in the sterilization chamber, and the sterilization process shown in FIG. 7 was performed.
- This sterilization process includes a step of depressurizing the sterilization chamber from atmospheric pressure to 65 Pascal, a step of maintaining the pressure in the sterilization chamber at 65 Pascal for 1 minute after decompression, and injecting 6 ml of peracetic acid preparation into the sterilization chamber at a time for 8 minutes.
- Example 1 Twenty test pieces were accommodated in a sterilization chamber and sterilized as shown in FIG. In this sterilization process, the injection process of the peracetic acid preparation was different from the sterilization process of Test 1, in which 6 ml of the peracetic acid preparation was injected in three portions. Other conditions are the same as in the comparative example.
- Example 2 Twenty sterilization objects were accommodated in the sterilization chamber, and the sterilization process shown in FIG. 9 was performed. In this sterilization process, the injection process of the peracetic acid preparation was different from the sterilization process of Test 1, in which 6 ml of the peracetic acid preparation was injected in 6 portions. Other conditions are the same as in the comparative example.
- Test results The number of test pieces in which the bacteria remained was “1” in the comparative example and “0” in Examples 1 and 2.
- Example 1 (4) Corrosion test
- a tray 240 was placed at the entrance of the sterilization chamber (directly below the pipe 226), and an aluminum foil was laid on the tray 240 to visually check the corrosion marks. Confirmed with. As a result, in Example 1, a slight corrosion mark was confirmed with the naked eye, but in Example 2, the corrosion mark could not be confirmed with the naked eye.
- Test 2 Using the vaporization part (comparative example) shown in FIG. 6 and the vaporization part (example) obtained by removing the partition wall, the hanging wall and the table from the vaporization part shown in FIG. Injected into the vaporizer, 4 minutes after the first sterilant injection, the second sterilant injection was performed, and after 4 minutes from the second sterilant injection, the sterilization chamber pressure was increased to 50,000 Pascals. . Other conditions are the same as those in Test 1.
- the sterilization method and sterilization apparatus of the present invention can be variously modified.
- the timer t2 is started after a predetermined amount (for example, 1 milliliter) of sterilant is injected, and the next sterilant injection is waited for the end of the timer t2.
- the injection timing of the sterilizing agent may be determined by management according to other conditions (pressure increase, time change rate of pressure) other than time.
- the valve 28 when metering is completed, the pressure Ps in the sterilization chamber 12 before opening the valve 28 and the pressure Ps ′ in the sterilization chamber 12 after opening the valve 28 are detected, and the pressure difference Ps ⁇ Ps. When 'exceeds a predetermined amount ⁇ P, the valve 28 may be closed.
- the vacuum pump 31 is driven when the sterilization chamber 12 is depressurized.
- the vacuum pump 31 activated in the preparation process is maintained in an operating state during the subsequent process, and the valve is operated in that state.
- a vacuum may be introduced into the sterilization chamber 12 by opening and closing 33.
- Sterilizer 2 Sterilization target 10: Housing 11: Outer container 12: Sterilization chamber 20: Sterilization gas supply device 21: Storage unit 22: Measuring unit (measuring chamber) 23: Vaporization part (vaporization room) 24: passage (sterilant supply passage) 25: passage (sterilant supply passage) 26: passage (sterilization gas supply passage) 27: valve 28: valve 30: vacuum device 31: vacuum pump 32: passage (exhaust passage) 33: Valve 40: Ventilator 41: Passage (ventilation passage) 42: Valve 50: Pressure detector 60: Controller 70: Plasma generator 71: Inner container 72: Room (sterilization chamber) 73: High frequency power source 74: Circuit 75: Insulating sleeve 201: Container 202: Container body 203: Lid 204: Partition wall 205: Internal space (vaporization chamber) 206: first chamber 207: second chamber 208: upper end surface 209: lid lower surface 210: gap 211, 212: wall surface 213,
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
Description
特許文献2:特許第4526649号公報
本発明に係る滅菌装置の実施形態は、
滅菌室と、
気化室と、
前記気化室を第1の部屋と第2の部屋を仕切る壁と、
前記第1の部屋と第2の部屋を接続する第1の通路と、
前記第1の部屋に配置されたテーブルと、
前記テーブルに向けて配置され、前記滅菌剤を前記テーブルに向けて噴霧するノズルと、
前記テーブルに向けて噴霧された前記滅菌剤の液体成分を溜める液溜部と、
前記第2の部屋と前記滅菌室を接続する第2の通路と、
前記滅菌室を減圧するとともに前記第1の通路と前記第2の通路を介して前記気化室の第1の部屋と第2の部屋を減圧する手段を備えており、
前記第1の通路は、厚さが小さく且つ幅が広い帯状の隙間によって形成されている。
前記壁は前記気化室の底から立ち上がった仕切り壁を有し、
前記仕切り壁の上端面と前記気化室の天井面との間に形成された帯状の隙間を有する。
前記壁が、前記気化室の底から立ち上がった第1の壁と、前記気化室の天井から垂れ下がった第2の壁とを有し、
前記第1の壁と第2の壁との間に前記帯状の隙間が形成されている。
前記第2の通路の前記滅菌室に接続された端部の下方にトレイが配置されている。
図1は、本発明の実施形態に係る滅菌装置の全体構成を概略的に示す。図示するように、滅菌装置1は、後述する滅菌室を形成するためのハウジング10を有する。ハウジング10は外側容器11を有する。
図2~図5を参照して、滅菌装置1が実行する滅菌処理を説明する。以下に説明する滅菌処理は、準備工程、第1滅菌工程、第2滅菌工程、滅菌ガス分解工程、換気工程を有する。
準備工程では、外側容器11の蓋と内側容器71の蓋を開けて、内側容器71の部屋72に滅菌対象2を収容する。滅菌対象2は、例えば内視鏡や内視鏡用の細長いチューブなどの医療機器である。滅菌対象2を収容すると、内側容器71の蓋と外側容器11の蓋を閉じ、滅菌室12を密閉する。
準備工程が終了し、滅菌装置1が起動されると、制御装置60は以下に説明するステップを実行する。
制御装置60は、滅菌ガス供給装置20、真空装置30、換気装置40の弁27,28、33、42を閉じ、プラズマ生成装置70の高周波電源73をオフする。また、制御装置60は、制御装置60の記憶部(図示せず)に記憶されているデータを初期化する(ステップ#1)。具体的には、後に説明するt1~t3及びn1~n4を「0」にリセットし、N1~N3をそれぞれ「2」、「6」、「10」に設定する。
制御装置60は、真空装置30の真空ポンプ31を駆動するとともに弁33を開いて滅菌室12を減圧する(ステップ#2)。これにより、滅菌室12の圧力は、大気圧から次第に減少する。
減圧中、制御装置60は、圧力検出器50の出力をもとに、滅菌室12の圧力Pが所定の圧力P1(例えば、120パスカル)に達したか否か判断する(ステップ#3)。
減圧室12の圧力Pが圧力P1に達したことが検出されると、制御装置60はプラズマ生成装置70の高周波電源73オンする(ステップ#4)。これにより、外側容器11と内側容器71の間にプラズマが生成され、滅菌室12の雰囲気が適当な温度まで暖められる。
制御装置60は、圧力検出器50の出力をもとに、滅菌室12の圧力Pが所定の圧力P2(例えば、65パスカル)に達したか否か判断し(ステップ#5)、滅菌室12の圧力が所定の圧力P2に達すると、真空装置30の弁33を閉じる(ステップ#6)。実際には、弁33を閉じた後に僅かに圧力が上昇することがあるため、弁33を開閉しながら滅菌室12の圧力を所定の圧力P2に維持することが好ましい。上述のように、滅菌室12と気化部23は通路26を介して連通しているので、滅菌室12に導入された負圧は気化部23にも導入され、気化部23の圧力も所定の圧力P2に設定される。
制御装置60は、タイマt1をスタートする(ステップ#7)。次に、制御装置60は、滅菌回数をカウントするカウンタn1の値が予め決められた値N1(=2)に等しいか否か判断する(ステップ#8)。本実施形態では、滅菌対象は、第1滅菌工程と第2滅菌工程の2つの滅菌工程を通じて滅菌されるため、上述のようにN1は「2」に設定されている。一方、カウンタn1は、初期化ステップ#1で「0」に設定されており、一回の滅菌工程が終了する毎に「1」が加算される(後に説明するステップ#25)。したがって、第1滅菌工程の最中はn1が「0」に設定され、第2滅菌工程の最中はn1が「1」に設定され、第2滅菌工程が終了するとn1が「2」に設定される。そのため、第1滅菌工程と第2滅菌工程の間制御装置60はステップ#9A~#10Aを実行し、第2滅菌工程終了後制御装置60はステップ#9B~#10Bを実行する。
制御装置60はタイマt1のカウント時間がT1(例えば、1分)に達したか否か判断し(ステップ#9A)、タイマt1のカウント時間がT1に達すると高周波電源73をオフし(ステップ10A)、プラズマの生成を停止する。
制御装置60は、滅菌剤収容部21から供給される滅菌剤を計量部(計量室)22で計量して所定量(例えば、1ミリリットル)の滅菌剤を準備する。具体的に、制御装置60は、閉じている弁28を開いて計量部22を減圧し、所定時間経過後に弁28を閉じて計量部22を負圧環境に保つ。続いて、制御装置60は、弁27を開く。これにより、収容部21から計量部22に所定量(例えば、1ミリリットル)が滅菌剤を供給される。滅菌剤の供給が終了すると、制御装置60は弁27を閉じる。
制御装置60は滅菌ガス供給装置20の弁28を開く。弁28が開かれると、気化部23が負圧(例えば、65パスカル)に設定されていること、また、気化部23と滅菌室12の容積の合計が計量部22の容積よりも遙かに大きいことから、計量部22に準備された所定量(1ミリリットル)の滅菌剤が気化部23に噴霧される。周知のとおり負圧下における滅菌剤の沸点は低いので、噴霧された滅菌剤は瞬時に気化して滅菌ガスとなる。
一回の噴霧が終了すると、制御装置60は、噴霧回数のカウンタn2に「1」を加える(ステップ#13)。計数カウンタn2は初期化ステップ#1で「0」に設定されている。
制御装置60は、タイマt2をスタートし(ステップ#14)、タイマt2のカウント時間がT2(例えば、80秒)に達したか否か判断し(ステップ#15)、タイマt2のカウント時間がT2に達すると弁28を閉じる(ステップ#16)。上述のように、弁28が開かれたことにより計量部22には負圧が導入されている。したがって、後に弁27を開くと収容部21から計量部22に所定量の滅菌剤が吸引される。
制御装置60は、噴霧回数のカウンタn2の値がN2に達したか否か判断し(ステップ#17)、n2がN2未満であれば、制御装置60はステップ#11から#16までの処理を実行する。例えば、実施形態では、初期化ステップ#1でN2は「6」に設定されている。したがって、図2に示すように、実施形態では、少量(例えば、1ミリリットル)の滅菌剤の計量、噴霧、気化が複数回繰り返され、滅菌室12の圧力は階段状に且つ連続的に上昇する。その結果、細長いチューブなどの医療機器であっても、その細い内部空間に滅菌ガスが繰り返し進入し、末端まで滅菌される。
以上の繰り返し滅菌処理が終了すると、制御装置60は換気装置40の弁42を開いて滅菌室12に大気を導入する。また、制御装置60は、圧力検出器50の出力をもとに、滅菌室12の圧力Pが所定の圧力P3(例えば、50,000パスカル)まで達したか否か判断する(ステップ#19)。そして、制御装置60は、滅菌室12の圧力PがP3まで達すると、弁42を閉じる(ステップ#20)。
制御装置60は、タイマt3をスタートし(ステップ#21)、タイマt3のカウント時間がT3(例えば、2分)に達するまで待機する(ステップ#22)。
ステップ#23~#24:
第2滅菌工程102(図2参照)に入ると、制御装置60は真空装置30の真空ポンプ31を駆動するとともに弁33を開いて滅菌室12を減圧する(ステップ#23)。次に、制御装置60は、圧力検出器50の出力をもとに、滅菌室12の圧力Pが所定の圧力P4(例えば、6,500パスカル)まで達したか否か判断する(ステップ#24)。実施形態では、ここでの減圧率(=圧力低下量/時間)は、上述したステップ#2~#3における減圧率よりも小さく設定されている。しかし、ステップ#23~#24における減圧率は、ステップ#2~#3における減圧率と同じであってもよい。なお、減圧率の調整は、例えば弁33の開度調整によって行うことができる。
滅菌室12の圧力がP4に達すると、制御装置60はカウンタn1に「1」を加える(ステップ#25)。したがって、初期化ステップ#1で「0」に設定されたカウンタn1がここで「1」に更新される。
次に、制御装置60は、ステップ#2に戻り、上述したステップ#2~#22を実行する。このとき、上述の通り、カウンタn1は「1」であるため、第2滅菌工程中、ステップ#8ではn1≠N1と判断し、ステップ9A~10Aが実行される。
分解工程103(図2参照)に入ると、制御装置60は真空装置30の真空ポンプ31を駆動するとともに弁33を開いて滅菌室12を減圧する(ステップ#23)。次に、制御装置60は、圧力検出器50の出力をもとに、滅菌室12の圧力Pが所定の圧力P4(例えば、6,500パスカル)まで達したか否か判断する(ステップ#24)。実施形態では、ここでの減圧率(=圧力低下量/時間)は、上述したステップ#2~#3における減圧率よりも小さく設定されている。しかし、ステップ#23~#24における減圧率は、ステップ#2~#3における減圧率と同じであってもよい。
滅菌室12の圧力がP4に達すると、制御装置60はカウンタn1に「1」を加える(ステップ#25)。したがって、第1滅菌工程の終了後「1」に設定されたカウンタn1はここで「2」に再設定される。
次に、制御装置60は、ステップ#2に戻り、上述したステップ#2~#7を実行する。
続いて、制御装置60は、ステップ#8で、カウンタn1がN1に等しいか否か判断する。上述の通り、この時点ではカウンタn1は「2」に設定されている。したがって、制御装置60は、n1=N1と判断し、ステップ9B~10Bを実行する。具体的に、ステップ9Bでは、タイマt1のカウント時間がT1’(例えば、5分)に達したか否か判断し(ステップ#9B)、タイマt1のカウント時間がT1’に達すると、ステップ#4でオンされた高周波電源73をオフし(ステップ10B)、プラズマの生成を停止する。
次に、制御装置60は換気装置40の弁42を開いて滅菌室12に大気を導入する。また、制御装置60は、圧力検出器50の出力をもとに、滅菌室12の圧力Pが所定の圧力P5(例えば、大気圧(1,013,000パスカル)又はほぼ大気圧)まで達したか否か判断する(ステップ#27)。そして、制御装置60は、滅菌室12の圧力PがP5まで達すると、弁42を閉じる(ステップ#28)。
換気工程104(図2参照)に入ると、制御装置60は真空装置30の真空ポンプ31を駆動するとともに弁33を開いて滅菌室12を減圧する(ステップ#29)。次に、制御装置60は、圧力検出器50の出力をもとに、滅菌室12の圧力Pが所定の圧力P6(例えば、30,000パスカル)まで達したか否か判断する(ステップ#30)。
滅菌室12の圧力がP6に達すると、制御装置60は弁33を閉じる(ステップ#31)。
次に、制御装置60は換気装置40の弁42を開いて滅菌室12に大気を導入する。また、制御装置60は、圧力検出器50の出力をもとに、滅菌室12の圧力Pが所定の圧力P5(例えば、大気圧(1,013,000パスカル)又はほぼ大気圧)まで達したか否か判断する(ステップ#33)。そして、制御装置60は、滅菌室12の圧力PがP5まで達すると、弁42を閉じる(ステップ#34)。
続いて、制御装置60は、カウンタn3に「1」を加え(ステップ#35)、加算されたカウンタn3の値がN3に等しいか否か判断し、n3≠N3であればステップ#29~#36を繰り返す。カウンタn3は、初期化ステップ#1で「0」に設定されており、一回の換気処理(ステップ#29~#34)が終了する毎に「1」が加算される。また、N3は初期化ステップ#1で「10」に設定されている。したがって、実施形態では、制御装置60は8回の換気処理を繰り返す。
図6は、滅菌ガス供給装置20の構成を示す。上述の通り、滅菌ガス供給装置20は、収容部21,計量部22,気化部23を有する。気化部23は、容器201を有する。容器201は、上部開口を有する容器本体202と、容器本体202の上部開口を閉じる上蓋203を有する。容器本体202は、その底部から上方に向けて伸びる仕切壁204を有し、容器本体202の内部空間(気化室)205が2つの部屋(第1の部屋206と第2の部屋207)に分割されている。仕切壁204の高さは、仕切壁204の上端面208と蓋203の下面(天井面)209の間に約1mmの隙間210が形成されるように決められている。
(1)試験方法
本発明の実施形態に係る滅菌装置の滅菌効率を試験(比較例,実施例1,2)によって評価した。各試験に用いた試験片は、ポリテトラフルオロエチレン(PTFE)からなる内径1mm、長さ1000mmのチューブである。チューブの一端は開放し、他端はバイオロジカルインジケータを貼り付けて閉鎖した。
比較例では、20個の滅菌対象を滅菌室に収容し、図7に示す滅菌処理を行った。この滅菌処理は、滅菌室を大気圧から65パスカルまで減圧する工程、減圧後滅菌室の圧力を65パスカルに1分間維持する工程、滅菌室に過酢酸製剤6ミリリットルを一時に注入して8分間放置する工程、減圧室の圧力を50,000パスカルまで昇圧する工程、昇圧後滅菌室の圧力を50,000パスカルに2分間維持する工程、滅菌室を65パスカルまで減圧する工程、減圧後滅菌室の圧力を65パスカルに1分間維持する工程、及び減圧室の圧力を大気圧まで昇圧する工程を含む。図示するように、1回目と2回目の減圧工程の際、滅菌室の圧力が120パスカルから65パスカルに低下するまでの時間帯と、減圧室が65パスカルに維持される時間帯は、滅菌室にプラズマを生成した。
20個の試験片を滅菌室に収容し、図8に示す滅菌処理を行った。この滅菌処理は、過酢酸製剤の注入プロセスが試験1の滅菌処理と異なり、そこでは6ミリリットルの過酢酸製剤を3回に分けて注入した。その他の条件は比較例と同じである。
20個の滅菌対象を滅菌室に収容し、図9に示す滅菌処理を行った。この滅菌処理は、過酢酸製剤の注入プロセスが試験1の滅菌処理と異なり、そこでは6ミリリットルの過酢酸製剤を6回に分けて注入した。その他の条件は比較例と同じである。
菌が残存した試験片の数は、比較例が「1」、実施例1,2が「0」であった。
試験結果が示すように、一時に多くの滅菌剤を滅菌室に注入するよりも、滅菌剤を複数に分割して注入することにより、より滅菌効率が良くなることが確認できた。
実施例1,2において、図6に示すように、滅菌室の入口(パイプ226の直下)にトレイ240を配置するとともに、このトレイ240にアルミニウム箔を敷き、腐食跡を目視で確認した。その結果、実施例1では僅かな腐食跡が肉眼で確認されたが、実施例2では腐食跡を肉眼で確認することはできなかった。
図6に示す気化部(比較例)と、図6に示す気化部から仕切壁、垂れ壁、テーブルを除去した気化部(実施例)を用い、6ミリリットルの過酢酸製剤を2回に分けて気化部に注入し、1回目の滅菌剤注入から4分経過後に2回目の滅菌剤注入を行い、2回目の滅菌剤注入から4分経過後、滅菌室の圧力を50,000パスカルまで昇圧した。その他の条件は試験1と同じである。
以上、滅菌方法及び滅菌装置の実施形態を説明したが、本発明の滅菌方法及び滅菌装置は種々改変可能である。例えば、上述の実施形態では、滅菌剤の分割注入の際に、所定量(例えば、1ミリリットル)の滅菌剤注入後にタイマt2をスタートし、このタイマt2の終了を待って次の滅菌剤注入を開始したが、滅菌剤の注入タイミングは時間以外の他の条件(圧力上昇量、圧力の時間変化率)によって管理によって決定してもよい。
2:滅菌対象
10:ハウジング
11:外側容器
12:滅菌室
20:滅菌ガス供給装置
21:収容部
22:計量部(計量室)
23:気化部(気化室)
24:通路(滅菌剤供給通路)
25:通路(滅菌剤供給通路)
26:通路(滅菌ガス供給通路)
27:弁
28:弁
30:真空装置
31:真空ポンプ
32:通路(排気通路)
33:弁
40:換気装置
41:通路(換気通路)
42:弁
50:圧力検出器
60:制御装置
70:プラズマ生成装置
71:内側容器
72:部屋(滅菌室)
73:高周波電源
74:回路
75:絶縁スリーブ
201:容器
202:容器本体
203:蓋
204:仕切壁
205:内部空間(気化室)
206:第1の部屋
207:第2の部屋
208:上端面
209:蓋下面
210:隙間
211,212:壁面
213,214:垂れ壁
215、216:隙間
217:蓋部分
220:ノズル
221:噴射口
222:傾斜テーブル
223:上面
224:液溜部
225:底部分
226:パイプ
Claims (4)
- 滅菌室と、
気化室と、
前記気化室を第1の部屋と第2の部屋を仕切る壁と、
前記第1の部屋と第2の部屋を接続する第1の通路と、
前記第1の部屋に配置されたテーブルと、
前記テーブルに向けて配置され、滅菌剤を前記テーブルに向けて噴霧するノズルと、
前記テーブルに向けて噴霧された前記滅菌剤の液体成分を溜める液溜部と、
前記第2の部屋と前記滅菌室を接続する第2の通路と、
前記滅菌室を減圧するとともに前記第1の通路と前記第2の通路を介して前記気化室の第1の部屋と第2の部屋を減圧する手段を備えており、
前記第1の通路は、厚さが小さく且つ幅が広い帯状の隙間によって形成されている、滅菌装置。 - 前記壁は前記気化室の底から立ち上がった仕切り壁を有し、
前記仕切り壁の上端面と前記気化室の天井面との間に形成された帯状の隙間を有する、請求項1の滅菌装置。 - 前記壁は、前記気化室の底から立ち上がった第1の壁と、前記気化室の天井から垂れ下がった第2の壁とを有し、
前記第1の壁と第2の壁との間に前記帯状の隙間が形成されている、請求項1の滅菌装置。 - 前記第2の通路の前記滅菌室に接続された端部の下方にトレイが配置されている、請求項1~3のいずれかの滅菌装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/603,919 US11890388B2 (en) | 2017-04-10 | 2018-04-10 | Sterilization method and sterilization device |
| JP2019512510A JP6964661B2 (ja) | 2017-04-10 | 2018-04-10 | 滅菌方法及び滅菌装置 |
| EP18784709.0A EP3610893A4 (en) | 2017-04-10 | 2018-04-10 | STERILIZATION METHOD AND STERILIZATION DEVICE |
| RU2019131573A RU2763975C2 (ru) | 2017-04-10 | 2018-04-10 | Способ стерилизации и устройство для стерилизации |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710230693.7A CN108686241B (zh) | 2017-04-10 | 2017-04-10 | 灭菌方法和灭菌装置 |
| CN201710230693.7 | 2017-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018190317A1 true WO2018190317A1 (ja) | 2018-10-18 |
Family
ID=63792489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/014990 Ceased WO2018190317A1 (ja) | 2017-04-10 | 2018-04-10 | 滅菌方法及び滅菌装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11890388B2 (ja) |
| EP (1) | EP3610893A4 (ja) |
| JP (1) | JP6964661B2 (ja) |
| CN (1) | CN108686241B (ja) |
| RU (1) | RU2763975C2 (ja) |
| WO (1) | WO2018190317A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3737426A4 (en) * | 2017-12-21 | 2021-08-18 | Accelera Technologies, LLC | SYSTEM AND METHOD FOR DETECTION OF PERACETIC ACID AND HYDROGEN PEROXIDE VAPOR |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2780228B2 (ja) | 1990-08-31 | 1998-07-30 | アブトックス インコーポレイテッド | パルス的な殺菌剤処理によるプラズマ殺菌方法及び装置 |
| JP2005087353A (ja) * | 2003-09-16 | 2005-04-07 | Shibuya Kogyo Co Ltd | 滅菌蒸気発生装置 |
| JP2007007422A (ja) * | 2005-06-30 | 2007-01-18 | Ethicon Inc | 滅菌システムおよびその気化装置 |
| JP4526649B2 (ja) | 1999-03-31 | 2010-08-18 | エシコン・インコーポレイテッド | 滅菌処理方法 |
| JP2013081651A (ja) * | 2011-10-11 | 2013-05-09 | Elquest Corp | 滅菌装置と滅菌方法 |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2604627B1 (fr) * | 1986-10-07 | 1988-12-23 | Mercey Gilles | Sterilisateur |
| US5084239A (en) | 1990-08-31 | 1992-01-28 | Abtox, Inc. | Plasma sterilizing process with pulsed antimicrobial agent treatment |
| US5674450A (en) * | 1994-04-28 | 1997-10-07 | Johnson & Johnson Medical, Inc. | Vapor sterilization using a non-aqueous source of hydrogen peroxide |
| US7569180B2 (en) * | 2004-10-12 | 2009-08-04 | Ethicon, Inc. | Sterilization system and method and orifice inlet control apparatus therefor |
| US6967315B2 (en) * | 2002-06-12 | 2005-11-22 | Steris Inc. | Method for vaporizing a fluid using an electromagnetically responsive heating apparatus |
| US6906296B2 (en) * | 2002-06-12 | 2005-06-14 | Steris Inc. | Electromagnetically responsive heating apparatus for vaporizer |
| EP1954323B1 (en) * | 2005-08-04 | 2014-04-23 | Saban Ventures Pty Limited | Membrane sterilization |
| CN1830491A (zh) * | 2006-04-12 | 2006-09-13 | 山东新华医疗器械股份有限公司 | 等离子体灭菌装置过氧化氢加注系统 |
| DE602007010983D1 (de) * | 2006-05-01 | 2011-01-13 | American Sterilizer Co | Wasserstoffperoxid-Zerstäuber |
| CA2678334C (en) * | 2007-03-06 | 2012-01-03 | Steris Inc. | Decontamination unit with collapsible decontamination enclosure and decontamination process |
| CN201481844U (zh) * | 2009-08-14 | 2010-05-26 | 山东新华医疗器械股份有限公司 | 过氧化氢气体消毒器 |
| CN201581080U (zh) * | 2009-11-12 | 2010-09-15 | 北京白象新技术有限公司 | 低温等离子体灭菌器抗力测试装置 |
| EP2509641A1 (en) * | 2009-12-10 | 2012-10-17 | Sidel S.p.a. Con Socio Unico | Sterilising and disinfection apparatus |
| JP5604511B2 (ja) * | 2010-03-31 | 2014-10-08 | パナソニックヘルスケア株式会社 | 過酸化水素ガス生成装置 |
| CN101810870B (zh) * | 2010-04-16 | 2012-09-05 | 北京白象新技术有限公司 | 通过压力负反馈控制过氧化氢脉动注液精确计量的方法及装置 |
| CN202184967U (zh) * | 2011-06-30 | 2012-04-11 | 蔡全峰 | 香精油气化扩散装置 |
| JP5605343B2 (ja) * | 2011-10-06 | 2014-10-15 | キヤノンマーケティングジャパン株式会社 | 滅菌装置および滅菌方法 |
| CN106620769A (zh) * | 2012-04-19 | 2017-05-10 | 艾那株式会社 | 气体氮氧化物产生法和气体氮氧化物产生装置 |
| EP2857045B1 (en) * | 2012-05-28 | 2018-08-01 | Saraya Co., Ltd. | Sterilization device and sterilization method using same |
| CN202699655U (zh) * | 2012-08-17 | 2013-01-30 | 连云港佑源医药设备制造有限公司 | 一种低温等离子体消毒灭菌器 |
| DE102013106531A1 (de) * | 2013-06-21 | 2014-12-24 | Elopak Systems Ag | Verdampfungseinrichtung zum Verdampfen eines Aerosols |
| US10632396B2 (en) * | 2015-04-29 | 2020-04-28 | Kunming University Of Science And Technology | Microwave flash evaporation process and apparatus and use thereof |
-
2017
- 2017-04-10 CN CN201710230693.7A patent/CN108686241B/zh active Active
-
2018
- 2018-04-10 RU RU2019131573A patent/RU2763975C2/ru active
- 2018-04-10 US US16/603,919 patent/US11890388B2/en active Active
- 2018-04-10 JP JP2019512510A patent/JP6964661B2/ja active Active
- 2018-04-10 WO PCT/JP2018/014990 patent/WO2018190317A1/ja not_active Ceased
- 2018-04-10 EP EP18784709.0A patent/EP3610893A4/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2780228B2 (ja) | 1990-08-31 | 1998-07-30 | アブトックス インコーポレイテッド | パルス的な殺菌剤処理によるプラズマ殺菌方法及び装置 |
| JP4526649B2 (ja) | 1999-03-31 | 2010-08-18 | エシコン・インコーポレイテッド | 滅菌処理方法 |
| JP2005087353A (ja) * | 2003-09-16 | 2005-04-07 | Shibuya Kogyo Co Ltd | 滅菌蒸気発生装置 |
| JP2007007422A (ja) * | 2005-06-30 | 2007-01-18 | Ethicon Inc | 滅菌システムおよびその気化装置 |
| JP2013081651A (ja) * | 2011-10-11 | 2013-05-09 | Elquest Corp | 滅菌装置と滅菌方法 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3610893A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3610893A1 (en) | 2020-02-19 |
| US11890388B2 (en) | 2024-02-06 |
| RU2019131573A (ru) | 2021-05-11 |
| CN108686241A (zh) | 2018-10-23 |
| US20200121817A1 (en) | 2020-04-23 |
| RU2763975C2 (ru) | 2022-01-12 |
| EP3610893A4 (en) | 2021-01-06 |
| CN108686241B (zh) | 2021-03-26 |
| RU2019131573A3 (ja) | 2021-05-11 |
| JP6964661B2 (ja) | 2021-11-10 |
| JPWO2018190317A1 (ja) | 2020-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104302328B (zh) | 以氮氧化物为基础的灭菌法以及灭菌装置 | |
| US9623132B2 (en) | Plasma-generated gas sterilization method | |
| US11554189B2 (en) | Plasma treatment device and method of treating items | |
| US20040037736A1 (en) | Plasma sterilisation system | |
| JP5707322B2 (ja) | サブサイクルベースのエアロゾル消毒システム | |
| KR20130042626A (ko) | 과산화수소 살균 방법 | |
| US8323582B2 (en) | Quantitative liquid injection device of plasma sterilizer | |
| WO2018190317A1 (ja) | 滅菌方法及び滅菌装置 | |
| US10039849B2 (en) | Plasma-generated gas sterilization method and device | |
| WO2018190315A1 (ja) | 滅菌方法及び滅菌装置 | |
| RU2610206C1 (ru) | Стерилизатор для стерилизации парами перекиси водорода | |
| RU168485U1 (ru) | Стерилизатор для стерилизации парами перекиси водорода | |
| JP2013236928A (ja) | 滅菌装置及び滅菌法 | |
| JP2013236928A5 (ja) | ||
| HK1243361B (zh) | 等离子体处理装置及物品处理方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18784709 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2019512510 Country of ref document: JP Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2018784709 Country of ref document: EP Effective date: 20191111 |
|
| WWW | Wipo information: withdrawn in national office |
Ref document number: 2018784709 Country of ref document: EP |