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DE102008050991B4 - Filter and processing device - Google Patents

Filter and processing device Download PDF

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Publication number
DE102008050991B4
DE102008050991B4DE200810050991DE102008050991ADE102008050991B4DE 102008050991 B4DE102008050991 B4DE 102008050991B4DE 200810050991 DE200810050991 DE 200810050991DE 102008050991 ADE1020080509950 ADE 102008099180 B1099150 B1099150 ADE 1020080180 B41099150 B4DE102008050991 B4DE102008050991 B4DE102008050991 B4DE 102008050991 B4DE102008099150 102008099150
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Germany
Prior art keywords
filter
filtering
cleaning
processing
channels
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DE200810050991
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English (en)
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DE102008050991A1 (de
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Robert Simmoteit
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Simmoteit, Robert, Dr.
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Images

Classifications

    • A — HUMAN NECESSITIES
    • A61-MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L — METHODS OR APPARATUS FOR STERILIZING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILIZATION, OR DEODORIZATION 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 sterilizing materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2 / 26 — Accessories or devices or components used for biocidal treatment
    • A — HUMAN NECESSITIES
    • A61-MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L — METHODS OR APPARATUS FOR STERILIZING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILIZATION, OR DEODORIZATION 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 sterilizing materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2 / 02 — Methods or apparatus for disinfecting or sterilizing materials or objects other than foodstuffs or contact lenses; Accessories there for using physical phenomena
    • A61L2 / 022-Filtration
    • A — HUMAN NECESSITIES
    • A61-MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L — METHODS OR APPARATUS FOR STERILIZING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILIZATION, OR DEODORIZATION 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 sterilizing materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2 / 16 — Methods or apparatus for disinfecting or sterilizing materials or objects other than foodstuffs or contact lenses; Accessories there for using chemical substances
    • A61L2 / 18 — Liquid substances or solutions comprising solids or dissolved gases
    • B — PERFORMING OPERATIONS; TRANSPORTING
    • B08 — CLEANING
    • B08B — CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3 / 00 — Cleaning by methods involving the use or presence of liquid or steam
    • B08B3 / 04 — Cleaning involving contact with liquid
    • B08B3 / 10 — Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity, by vibration
    • B08B3 / 14 — Removing waste, e.g. labels, from cleaning liquid; Regenerating cleaning liquids
    • A — HUMAN NECESSITIES
    • A61-MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L — METHODS OR APPARATUS FOR STERILIZING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILIZATION, OR DEODORIZATION 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 sterilizing materials or objects
    • A61L2202 / 10 — Apparatus features
    • A61L2202 / 15 — Biocide distribution means, e.g. nozzles, pumps, manifolds, fans, baffles, sprayers
    • A — HUMAN NECESSITIES
    • A61-MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L — METHODS OR APPARATUS FOR STERILIZING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILIZATION, OR DEODORIZATION 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 sterilizing materials or objects
    • A61L2202 / 10 — Apparatus features
    • A61L2202 / 17 — Combination with washing or cleaning means
    • A — HUMAN NECESSITIES
    • A61-MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L — METHODS OR APPARATUS FOR STERILIZING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILIZATION, OR DEODORIZATION 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 sterilizing materials or objects
    • A61L2202 / 10 — Apparatus features
    • A61L2202 / 18 — Aseptic storing means
    • A61L2202 / 182-Rigid packaging means
    • A — HUMAN NECESSITIES
    • A61-MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L — METHODS OR APPARATUS FOR STERILIZING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILIZATION, OR DEODORIZATION 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 sterilizing materials or objects
    • A61L2202 / 20 — Targets to be treated
    • A61L2202 / 24-Medical instruments, e.g. endoscopes, catheters, sharps

Abstract

Description

  • The invention relates to a filter and processing device for holding, cleaning and sterilizing products, which can also be used as a cleaning device and as a sterilization container and is used in particular for the medical field.
  • Background of the invention
  • The filtering of aqueous liquids with filters made of a stainless steel mesh, a ceramic, a plastic or a paper material are widespread in the field of medical and laboratory technology, in mechanical engineering and automotive engineering as well as in the chemical industry.
  • Known filter units made of a stainless steel mesh are preferably used to remove insoluble particles or dirt from liquids. In the field of sterile technology, particularly fine-pored filter units are used to filter germs from media and thus to make them sterile. In medical technology, blood filters are used to separate blood plasma and blood cells.
  • In the known technical configuration, a filter unit is used which filters the liquid medium in the form of a plastic melt through a rotatable filter unit. A rotatable filter insert is used here. In the area of ​​cleaning eye instruments, filter devices with Luer Lock adapters are used in cleaning and disinfection machines. The filters contained here are made of ceramic or metal and must be replaced from time to time. Such filters are used by Miele or Steelco washer-disinfectors to clean fine eye cannulas. The prior art also includes holders for drills that are used in connection with a container. Such a device is described in US Pat. Here dental drills are held in closed tubes. In medical technology it is of general interest that when cleaning sensitive hollow instruments, no particles or impurities get into the reprocessable instruments, as otherwise the function of these products can be impaired. In addition, a sterilization and processing device is described as a needle and syringe holder, in which filter surfaces and surfaces with openings for media are combined.
  • In order to be able to safely process the large number of differently designed medical and laboratory instruments in the future, a practical and simple design of such filter units is necessary. It is particularly disadvantageous that these devices are inflexible and a number of different constructions are necessary in order to be able to safely reprocess the instruments. An economical reprocessing of drills, milling cutters and instrument tips with a particularly complex structure is not known. In the field of technical filtering of aqueous media, an economical design and use of known filter materials is also useful in order to better control cleaning processes for liquids, to prevent a clogged filter or to be able to clean it quickly.
  • Summary of the invention
  • It is therefore the object of the invention to support the product preparation and in particular the product cleaning by means of a flexibly usable filter and cleaning device in connection with an integrated product holder. The device should be sterilizable and, if necessary, it should also be used as a sterilization container for small instruments. Furthermore, the device should be suitable for the preparation of hollow bodies and their mounting, but should not be restricted to these. The embodiment of the invention enables flexible use in cleaning and disinfection machines as well as use outside of machines. The innovation is not limited to the reprocessing of medical products.
  • This object is achieved according to the invention by a filter and processing device according to claim 1, a cleaning device in connection with a cleaning and disinfection machine according to claim 18 and by a processing device and sterilization container according to claim 22. The dependent claims relate to advantageous embodiments of the invention.
  • The object is achieved by a filter and processing device for holding, cleaning and sterilizing products, in particular for the medical sector, which consists of a lower and an upper device part and is characterized in that the device contains changeable passage areas for media which from Filter surfaces or a combination of filter surfaces and surfaces with openings are formed and the passage areas are changed by rotating superimposed grids or pores or by covering them with a perforated diaphragm or via a device part with channels.
  • The passage areas of the invention consist, for example, of grids in the form of meshes or areas with defined filter pores, which can also have cutouts, formations or markings. These are useful when rotating the grids to show whether they are crossing or how the grids are overlapping. The grids are z. B. used as round or geometrically shaped filter surfaces. Preferred passage areas for media have opening areas or pores with a size between 100-1000 μm. The open area of ​​the filter can take up 5–50%. Narrow grids lying one on top of the other with small opening sizes (100–500 μm) produce a clearly visible diffraction pattern or inferential pattern when light passes through. The different diffraction patterns are determined by the sizes and arrangement of the passage areas through which light can pass. In the field of sterilization, sterilization filters can e.g. B. made of paper or Teflon filters are used. Plastic and / or metal mesh fabrics serve as suitable stackable filter grids or filters. Areas with larger and defined openings are defined here as pinhole diaphragms. Alternatively, a pinhole diaphragm with movable shutters, like a camera, can also be used. In the latter case, the entire passage area in the device would be variably changeable and closable via this. The filter grids, arranged one above the other and changeably arranged, form a filter unit which is characterized in that the grids can be interchangeable and can be spaced differently. The latter arrangement has an influence on the amount of penetration that is passed through the device.
  • It can further be provided that there is a divisible passage area for media. Geometrically shaped filter grids are located in a breakthrough area with at least one opening. A part of the surface serves as a filter surface, whereas the other surface part can be impermeable to media. Furthermore, the filter grid itself can be divisible. This refinement enables the medium flow rate to be limited in order not to let the pressure drop in a machine become too great.
  • In the development of the invention, filter grids, sterile filters and passage areas with channels in the form of cylindrical openings can be combined with one another in order to enable targeted product preparation. It can be provided here that cylindrical openings are used in order to improve the cleaning and drying performance. Alternatively it can be provided that a constriction in the form of a nozzle is connected upstream in the channels in order to e.g. B. to further increase the cleaning performance in the sewer. The nozzles can also be combined as an additional device part with the upper device part.
  • The innovation also enables a processing device in the form of a sterile container for products in such a way that a device part has channels or holders or a combination of holders and channels and is a cleaning device for products that has a lower device part and a sterile filter contained here and a Lid forms a sterile container. This configuration is particularly useful for smaller products, such as. B. suitable for dental or neurological drills in order to sterilize them after cleaning without repacking. A sterile container is produced in that, after cleaning, the entire device is closed by means of a cover and, if necessary, from below. Alternatively, for example, the upper part of the device can be used in conjunction with a closure part suitable for sterilization in order to produce a sterile container therefrom. If the cleaning device is used for this purpose, it receives a sterile filter instead of the filter grille or a sterile filter is also inserted. The device is closed with a suitable cover. The lid can be made of metal or plastic and itself have a sterile filter to enable sterilization. Alternatively, soft packaging can be used in addition or only to sterilize the device or a device part. For the first time, the innovation enables a complete reprocessing cycle in such a way that medical instruments are cleaned, held, sterilized, transported via a device and products are sterile removed in the operating room.
  • Preferably, two identically designed filter grids are used, which are pressed onto one another via at least one sealing or spacer ring or frame. Alternatively, these rings can be made of an elastic material, such as. B. silicone or some other stable material. The use of a stable frame favors the spaced arrangement and the rotation of the separable and / or stacked filter surfaces of the filter unit. A rotatable filter surface has a guide rod connected to a frame. A filter unit or a breakthrough surface can be rotated with respect to another filter surface via this guide rod. Depending on the type of filter or breakthrough surfaces that are present, the media passage openings are covered in different sizes. It can also be provided that a filter grille surface is combined with a suitable perforated disk, in which the passage openings for media are completely covered by rotating the perforated disk or two perforated disks that lie one above the other are rotated. The rotation can also take place continuously in order to generate a pulsed cleaning jet. A pulsed solution flow can also be achieved through a rotatable perforated diaphragm with lamellas that open and close.
  • The inventive device thus differs from known devices such as those from Miele or Steelco in that the filters and the cleaning performance can be matched to the products to be cleaned. A separable filter unit can also be cleaned better in this way. A rotatable arrangement of filter grids or pore filters with a changeable passage area even enables the filter unit to be cleaned without having to disassemble it. The cleaning of the contained filters is improved in that the contained filter grids are rotated in the device in such a way that they are arranged congruently one above the other in order to produce an enlarged media passage. A separable filter unit in connection with a soft superstructure, e.g. B. made of a silicone grid, has the advantage that the sensitive instrument tips lying here are not damaged.
  • In a further development of the invention, replaceable product holders are provided which can be screwed to the lower part of the device. A silicone cap or cover can be connected to the upper part of the device alone or in conjunction with an additional product holding part. The silicone cover has an opening for inserting an instrument, such as. B. a dental elbow or a drill chuck. The product is held securely by combining it with another stable holder. The holding part can be made very long in order to hold long cavity instruments. Alternatively, silicone caps can be used to protect the product during transport and when sterilizing the device. These must not have any openings.
  • In order to clean particularly difficult and small instrument parts, such as drills or savers, it can be provided that the upper part of the device, as in the case of a revolver, has cylindrical channels as openings into which the instrument tips are inserted. It can be provided that the device part contains exchangeable or permanently integrated nozzles in order to increase the cleaning performance. In order to protect the instrument tips, these nozzles can consist of a plastic material and, like cartridges, can be inserted from below into the openings of the revolver device. It is advantageous if the instruments are held in a retaining ring or from above by a cover. The invention thus enables efficient and economical cleaning, in particular of narrow hollow bodies and of drills. It can further be provided that the retaining ring or an additional part with markings or inscriptions is present. These improve instrument recognition and assignment. Alternatively, the upper part of the device z. B. be part of a dental tray and used in the operating theater as an instrument holder. Correspondingly, the entire device can also be inserted into a tray and then sterilized.
  • Further advantages of the invention result from the fact that the product cleaning and drying can be matched to the size of the instrument channels through the changeable passage areas for media. Further advantages also result from the fact that the device can be used to analyze the particle load during product preparation. Thanks to the separable filter unit, the retained particles can be removed from the filter grids and sent for analysis.
  • In a further development of the invention, it can also be provided that the filter and cleaning device is used as a test body device in such a way that test bodies are introduced into the rooms of the device or the filter unit itself represents a test body and, after cleaning, drying or sterilization, at the same time Determination of the remaining pollution is used. In this way, the residues of contamination can be removed in a controlled manner using protein-detaching solutions and subjected to further analysis. Because the device is divisible, the test bodies contained therein can also be visually inspected.
  • Another use of the device is to use it in cleaning machines for external cleaning. It is provided here to use the device with a rotary arm or in connection with a main media distributor in a cleaning machine in order to be able to better clean product outer surfaces and hollow products. The aim can be to improve the cleaning performance of rotating arms in a cleaning machine. A filter unit can be largely dispensed with here.
  • Areas of application and embodiments