EP3990034A1 - Vorrichtung und verfahren zur desinfektion von haut sowie verwendungen hiervon - Google Patents
Vorrichtung und verfahren zur desinfektion von haut sowie verwendungen hiervonInfo
- Publication number
- EP3990034A1 EP3990034A1 EP20734176.9A EP20734176A EP3990034A1 EP 3990034 A1 EP3990034 A1 EP 3990034A1 EP 20734176 A EP20734176 A EP 20734176A EP 3990034 A1 EP3990034 A1 EP 3990034A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- irradiation
- user
- leds
- disinfected
- skin
- 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.)
- Pending
Links
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
- A61L2/0005—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor for pharmaceuticals, biologicals or living parts
- A61L2/0011—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor for pharmaceuticals, biologicals or living parts using physical methods
- A61L2/0029—Radiation
- A61L2/0047—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
- A61L2/24—Apparatus using programmed or automatic operation
-
- 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
- A61L2202/13—Biocide decomposition means, e.g. catalysts, sorbents
-
- 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
Definitions
- the present invention relates to a device and a method for disinfecting skin, in which the skin to be disinfected is irradiated with light emitted by UV LEDs with a wavelength of less than or equal to 230 nm.
- the device relates to a device and a method as well as possible uses of the device or the method.
- Increasing resistance of bacterial microorganisms poses increasing problems for hospitals and medical practices.
- the number of nosocomial infections caused by multi-resistant pathogens (MDROs) is also increasing year after year.
- MDROs multi-resistant pathogens
- the mortality rate is very high at around 36% due to the weakened immune system.
- Disinfection in clinics and medical practices is currently almost exclusively carried out using liquid chemical disinfectants.
- Hand disinfection is carried out using a disinfectant dispenser on the wall and rubbing the disinfectant on the hand.
- This has a couple of decisive disadvantages, but these are accepted cheaply since an infection or even a large-scale pathogen outbreak would be significantly more expensive.
- the first disadvantage would be the cost. Since liquid disinfectants are used, the dispensers have to be refilled over and over again, and the manufacturers can of course pay for that well. There are therefore running costs that are not insignificant, since a nurse, for example, has to disinfect her hands around 180 times per shift.
- the second disadvantage is the ingredients in the disinfectant.
- alcohols are used that "only" degrease the skin and thus dry it out. People who come into contact with them often suffer from rough skin. This has to be done with additives such as panthenol or a moisturizing cream at the end of the
- substances such as triclosan are used, allergies can also occur, which can lead to the person in question no longer being able to work.
- the American FDA has therefore included triclosan and 18 other substances found in disinfectants in products forbidden for private households, as there has been no alternative to this in the medical field.
- the third disadvantage is the time. Chemical disinfectants must act for at least 30 seconds. With 180 disinfection processes of 30 seconds each, 90 minutes are lost per shift just for hand disinfection, which is missing in patient care. That leads to the next problem. Due to the time pressure, the disinfectant is only applied briefly and often not evenly enough, which means that there are always places, especially between the fingers, that are not wetted. This means that the process cannot actually be validated and the hospitals are faced with the problem of not being able to prove in the event of a legal dispute that the disinfection Regulations have been complied with.
- the fourth problem is hand washing.
- the substances previously applied get into the wastewater and thus into the sewage treatment plant. Since the substances have a microbiocidal effect, the performance of the biological stage of the sewage treatment plant, in which bacteria do their work, is reduced. Sewage treatment plants are already struggling with antibiotics and other drug residues that can only be dismantled at high cost and otherwise end up in the environment.
- UVC light which also has a germicidal effect, was previously not possible because of the formation of erythema and the risk of cancer at wavelengths, as has previously been the case with traditional mercury-based radiation sources.
- the wavelength of such radiation sources is physically fixed and cannot be changed.
- the object of the present invention is therefore to provide a device and a method that enables a reliable, non-chemical disinfection of skin, whereby the aforementioned disadvantages can be avoided.
- the present invention thus relates to a device for disinfecting skin, comprising at least one irradiation chamber accessible via a receiving opening for the introduction of a body part to be disinfected, and at least one LED arranged on a boundary surface and / or within the irradiation chamber, which emits UVC light Wavelength of ⁇ 230 nm emitted.
- the process can also be used to disinfect wounds. These are usually unproblematic, as a biofilm or a grind forms on them very quickly, which also cannot be irradiated due to the small end ring depth.
- the invention is based on this active mechanism at wavelengths of 230 nm and shorter. UVC LEDs in this low wavelength range are currently being developed by various manufacturers and are already available as prototypes.
- the most important advantage of the invention is that only electricity costs and occasional cleaning costs arise for operation.
- the constant purchase of chemical disinfectant solutions, which was previously necessary in the clinics, is no longer necessary.
- the invention is significantly more cost-effective.
- Another advantage is that the disinfection process can be validated due to the integrated sensors, which was previously not the case with manual disinfection. In contrast to previous chemical disinfection solutions (alcohols, triclosan, polycyclic musk compounds, etc.), no irritating or harmful substances get into the air. The smallest amounts of ozone that may be produced during irradiation are eliminated in the device.
- An advantageous embodiment of the device provides that a plurality of LEDs is arranged, since a more homogeneous radiation field and uniform illumination of the area to be disinfected can be achieved in this way.
- the plurality of LEDs is arranged in at least one linear or planar array.
- the at least one array comprises 5 to 300 LEDs, preferably 20 to 200 LEDs, particularly preferably 75 to 125 LEDs. It is very particularly preferably provided that a plurality of LEDs are arranged in at least two linear or flat arrays arranged opposite one another in pairs, the arrays delimiting the irradiation space.
- a body part to be disinfected for example a hand
- a body part to be disinfected for example a hand
- the two UV LED arrays then irradiate the hand from both sides.
- At least two linear or flat arrays arranged opposite one another in pairs are arranged at a distance of 5 to 50 cm, preferably 7 to 15 cm, from one another.
- the at least one LED or the at least one array can be covered with a cover that is transparent to the light emitted by the at least one LED, in particular a pane of quartz glass.
- the at least one LED preferably each array of LEDs, can be regulated in power.
- the radiation dose emitted in each case can be specifically tailored to a user or to a respective application scenario.
- the at least one irradiation room comprises at least one ventilation system which is designed to remove air from the at least one irradiation room.
- products of photochemical reactions that occur during the irradiation process for example ozone that occurs, can be removed from the radiation space.
- the at least one ventilation system comprises at least one fan and at least one exhaust air duct, via which air discharged from the at least one irradiation room can be supplied to the environment.
- the ventilation system particularly preferably comprises at least one means for breaking down ozone through which the air discharged from the at least one irradiation room flows, in particular activated carbon.
- the at least one means for breaking down ozone is arranged in front of an outlet of the exhaust air duct.
- the at least one ventilation system is delimited to at least one irradiation room by an air-permeable shut-off device, in particular a grid.
- the at least one ventilation system in particular the at least one exhaust air duct, has a device for thermal exchange of the at least one LED, preferably the majority of LEDs, in particular the plurality of LEDs arranged in at least one linear or flat array with the exhaust air, in particular comprises at least one lamellar heat sink.
- the waste heat generated by the LEDs during operation can be removed together with the waste air. Overheating of the entire system and a reduction in the service life of the UVC LEDs can thus be avoided.
- the device preferably comprises two irradiation rooms that are spatially separated from one another.
- both hands of a user can be disinfected at the same time.
- the device according to the invention can furthermore comprise at least one device for registering the presence and / or position of a body part to be disinfected, preferably at least one camera, particularly preferably a camera with fisheye optics, which is arranged in particular in the spatial separation.
- at least one device for registering the presence and / or position of a body part to be disinfected preferably at least one camera, particularly preferably a camera with fisheye optics, which is arranged in particular in the spatial separation.
- the presence of a body part to be disinfected can be registered and an automatic implementation of the disinfection process in the presence of the body part can be started. It can also be registered whether the body part to be disinfected is in the correct position within the device according to the invention.
- this can consist, for example, in the fact that the means can be used to register whether the fingers are spread apart or the hand is closed. In the latter case in particular, it would not be possible to disinfect the area between the fingers.
- the device can be designed in such a way that in this case feedback is sent to the user goes, so that a correct positioning of the body to be disinfected part, for example, the hand is possible.
- the instruction to the user could, for example, be designed in such a way that the user receives the instruction to spread his fingers and / or that the disinfection process does not begin until the body part is correctly positioned within the device.
- the size of the body part to be disinfected can also be registered with this means and the radiation dose to be emitted, for example via the intensity of the irradiation or the duration of the irradiation of the disinfection process, can be optimized.
- a gender-specific assignment of the respective user can take place in order to also carry out a gender-specific adjustment of the radiation dose.
- the device preferably comprises at least one means for the face recognition of a user and / or for recognizing whether the eyes of a user are open or closed, in particular a camera as well as means for evaluating camera signals for face recognition and / or for recognizing whether the eyes of a user are are open or closed.
- a gender recognition of the user can also be carried out with the means for face recognition in order to adapt the radiation dose therein.
- the means for face recognition can also be used to identify whether the user has opened or closed his eyes.
- the device can be controlled with the data collected by the means for face recognition in such a way that the disinfection process is only activated when the user has closed his eyes and is holding them. In the event that the user opens their eyes, the disinfection process can be canceled.
- a message can be sent to the user to close his eyes or keep them closed during the disinfection process.
- the device thus comprises a means for regulating the irradiation duration and / or irradiation intensity of the body part to be disinfected within the at least one irradiation room in coordination with the detected shape, size, position and / or arrangement and / or geometry. bad of a user and / or feedback to a user in the event of an incorrect position and / or arrangement of the body part to be disinfected within the at least one irradiation room and / or delivery of handling instructions to a user in the event of an incorrect position and / or arrangement of the body part to be disinfected within the at least one radiation room.
- the present invention also relates to a method for disinfecting the skin of a mammal, in particular a human, in which the skin is irradiated with light from at least one LED with a wavelength of ⁇ 230 nm.
- the method is preferably carried out in such a way that the irradiation with an irradiation intensity of at least 5 mJ / cm 2 , preferably 5 to 1,000 mJ / cm 2 , more preferably 10 to 500 mJ / cm 2 , more preferably 20 to 100 mJ / cm 2 , particularly preferably 30 to 50 mJ / cm 2 , based on the surface of the skin to be disinfected.
- the irradiation can take place over a period of 0.1 to 30 s, preferably 1 to 20 s, more preferably 3 to 10 s, particularly preferably 5 to 8 s.
- the method according to the invention is particularly preferably carried out with a device according to the invention described above.
- the method according to the invention is preferably carried out in such a way that, by means of the at least one device for registering the presence and / or position of a body part to be disinfected, the presence and / or position of the at least one hand is registered and, if present, that is, the at least one hand and the correct position of the at least one hand the irradiation is carried out, or if the at least one hand is present and the at least one hand is incorrectly positioned, handling instructions are issued to the user to correct the position of the at least one hand.
- irradiation duration and / or irradiation intensity of the body part to be disinfected within the at least one irradiation room can be regulated in coordination with the recorded shape, size, position and / or arrangement and / or gender of a user.
- the device is particularly preferably irradiated only when the means for facial recognition of a user and / or for recognizing whether the eyes of a user are open or closed, in particular a camera and means for evaluating camera signals for face recognition and / or for Detection of whether the eyes of a user are open or closed, it is determined that the eyes of the user are closed.
- the method according to the invention can, for example, also be configured in such a way that the user is regularly reminded to re-disinfect the hands, for example.
- This can be configured, for example, in such a way that a user carries a timer device with him, the timer being started after the disinfection process has ended and the user is prompted to perform a new disinfection process after a predefined timer interval has elapsed.
- the present invention relates to the possibility of using the device according to the invention, in particular for disinfecting the skin of a mammal, preferably a human, in particular in the area of the hands and / or for disinfecting wounds.
- the present invention is described in more detail with reference to the following embodiments without restricting the invention to the embodiments shown.
- the device according to the invention is exemplarily explained in more detail using the two cross sections, as shown in FIGS. 1 and 2.
- Fig. 1 shows a horizontal cross section through the radiation space II of a device according to the invention I.
- the device I according to the invention comprises in the exemplary embodiment shown in Fig. 1, a flächi ges array 3 with UV LEDs 1, the light with a wavelength of less than or equal Emit 230 nm.
- Each irradiation room II has a corresponding LED array.
- each irradiation room II comprises an LED array 3 with a total of 95 UV LEDs 1.
- Each irradiation room II of the device I according to the invention has openings 11 through which the body to be disinfected part, for example the hands can be introduced into the respective irradiation room II.
- the irradiation rooms II are structurally separated from each other, whereby a 180 ° fisheye camera can be arranged in the structural separation, with which the presence of one or both hands in the respective irradiation room II can be registered. Only if a hand is present in the respective irradiation room II then an activation of the UV LEDs 1 takes place.
- the irradiation room II can be delimited by a grille 8 to which an air duct 7 connects Air can be sucked from the radiation space II, for example by means of a fan 4.
- the arrows shown indicate the direction of the air flow.
- FIG. 2 shows a vertical cross section through an irradiation room II of a device I according to the invention, as shown in FIG.
- the array 3 of LEDs 1 arranged on both sides of the irradiation room II can be seen.
- the LED array 3 is additionally covered by a quartz glass protective pane 2 which is transparent to UV light.
- the array 3 of UV LEDs 1 can be protected from mechanical influences.
- the course of the air duct 7 with which the exhaust air can be sucked out of the irradiation room II of at least the fan 4 can also be seen.
- the arrows in turn represent the air flow.
- the exhaust air duct 7 leads behind the arrays 3 of UV LEDs 1.
- a lamellar heat sink 9 is attached through which the exhaust air flows can be. This enables effective cooling of the LED circuit board 3 during operation of the device I, whereby overheating can be effectively prevented.
- an activated carbon filter 5 in front of the outlet of the exhaust duct 7 in order to catalytically break down the pollutants, for example ozone.
- the radiation source of the disinfection device for one hand consists of two opposing LED arrays radiating towards each other, each from about 10 cm, which are equipped with UVC LEDs 1 in the wavelength range less than or equal to 230 nm peak emission wavelength 2. So that the UVC-LED arrays do not get dirty or are easier to clean and maintain, each UVC-LED array is covered with a pane of quartz glass 3. Between these LED arrays we insert the hand at an angle from below 4. Each LED array is individually adjustable in its irradiation intensity 5. In this way, the front and back of the hand can be irradiated with different, adjustable doses via one of the UVC LED arrays. By inserting the hand from below, the device is suitable for wall mounting at head height.
- a functional test of the LED arrays and the simultaneous metrological recording of the applied radiation dose takes place via one photodiode per UVC LED array 6.
- Two such units are installed in the device, one for the right and one for the left hand.
- a camera with 180 ° fisheye optics 7 is located between these two units.
- image recognition software it records the shape and size of the hands and whether the fingers are closed or spread apart 8. It is also recorded whether skin areas are through Rings are covered and therefore cannot be disinfected. It is important to spread your fingers so that gaps can be disinfected over the entire surface.
- the shape of the hand and the size of the hand indicate whether it is a man or a woman 9.
- the thickness of the stratum cornum is different in men and women, which, together with the information about the front and back of the hand, is used to adjust the radiation dose .
- the wavelength used may also produce a small amount of ozone in the device. This also helps to increase the disinfection effect, as it flows around the skin surface. As an irritant gas, however, this ozone must be prevented from entering the air.
- An activated carbon filter 10 is integrated into the air outlet of the device for this purpose. A fan sucks air through the openings into which the hands are inserted and the irradiation room, leads this air enriched with ozone in the reactor room, for cooling over the back of the LED arrays and through the activated carbon filter back to the outside 11. Im Activated carbon filter, the ozone is broken down into molecular oxygen and carbon dioxide.
- the disinfection process is not recorded for reasons of data protection law. Instead, the invention has a functionality to ensure the disinfection activities of the user without the need to collect data. To do this, each employee wears a small device in the form of a badge on their clothing, which contains an RFID chip and a microcontroller. An electronic timer is running in this device. This timer is reset during a disinfection process to 14 when the person is in front of the disinfection device and the disinfection process was successful. The timer then starts running again. If a pre-programmed threshold has been reached, an acoustic signal 15, which becomes more and more urgent, sounds, which makes the person aware to disinfect their hands again. This ensures that the disinfection takes place regularly, but no data on the manual disinfection behavior of the respective clinic or practice employee must be recorded.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019209305.1A DE102019209305A1 (de) | 2019-06-26 | 2019-06-26 | Vorrichtung und Verfahren zur Desinfektion von Haut sowie Verwendungen hiervon |
PCT/EP2020/067313 WO2020260186A1 (de) | 2019-06-26 | 2020-06-22 | Vorrichtung und verfahren zur desinfektion von haut sowie verwendungen hiervon |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3990034A1 true EP3990034A1 (de) | 2022-05-04 |
Family
ID=71120180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20734176.9A Pending EP3990034A1 (de) | 2019-06-26 | 2020-06-22 | Vorrichtung und verfahren zur desinfektion von haut sowie verwendungen hiervon |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3990034A1 (de) |
DE (1) | DE102019209305A1 (de) |
WO (1) | WO2020260186A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020120217A1 (de) | 2020-07-31 | 2022-02-03 | LED3.0 GmbH | Handdesinfektionsvorrichtung und Verfahren |
WO2023009040A1 (en) * | 2021-07-27 | 2023-02-02 | Alnassar Abdulaziz | Automatic surgical hand sanitizer device and method of use |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100266446A1 (en) * | 2009-04-20 | 2010-10-21 | Mr.Jimmy Constantacos | Hands and forearms sanitizer |
EP2465543B1 (de) * | 2010-12-19 | 2013-05-01 | Marino Pastore | Vorrichtung zur Sterilisation und Desinfektion der Hände einer Person |
US20160271280A1 (en) * | 2015-03-18 | 2016-09-22 | Rayvio Corporation | Applications of uv leds for disinfection |
WO2016179193A1 (en) * | 2015-05-04 | 2016-11-10 | One Health Labs, Inc. | Uv-c based skin sterilization device |
EP3848060A1 (de) * | 2015-06-03 | 2021-07-14 | The Trustees of Columbia University in the City of New York | Vorrichtung, verfahren und system zur selektiven beeinflussung und/oder vernichtung eines virus |
JP2017136145A (ja) * | 2016-02-02 | 2017-08-10 | ウシオ電機株式会社 | 殺菌装置 |
DE102016008324A1 (de) * | 2016-07-07 | 2018-01-11 | Lengmo Gmbh | Desinfektionsvorrichtung und Desinfektionsverfahren |
JP7119534B2 (ja) * | 2018-04-24 | 2022-08-17 | ウシオ電機株式会社 | 乾燥殺菌装置および乾燥殺菌方法 |
-
2019
- 2019-06-26 DE DE102019209305.1A patent/DE102019209305A1/de active Pending
-
2020
- 2020-06-22 WO PCT/EP2020/067313 patent/WO2020260186A1/de unknown
- 2020-06-22 EP EP20734176.9A patent/EP3990034A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2020260186A1 (de) | 2020-12-30 |
DE102019209305A1 (de) | 2020-12-31 |
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