WO2001045755A2 - Verfahren und applikator zum nachweis der reinigung und/oder desinfektion von flächen oder gegenständen - Google Patents
Verfahren und applikator zum nachweis der reinigung und/oder desinfektion von flächen oder gegenständen Download PDFInfo
- Publication number
- WO2001045755A2 WO2001045755A2 PCT/DE2000/004583 DE0004583W WO0145755A2 WO 2001045755 A2 WO2001045755 A2 WO 2001045755A2 DE 0004583 W DE0004583 W DE 0004583W WO 0145755 A2 WO0145755 A2 WO 0145755A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- disinfection
- cleaning
- partial
- indicator
- objects
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
- G01N31/226—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating the degree of sterilisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/70—Cleaning devices specially adapted for surgical instruments
-
- 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
- A61L2/28—Devices for testing the effectiveness or completeness of sterilisation, e.g. indicators which change colour
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
- C12Q1/22—Testing for sterility conditions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/70—Cleaning devices specially adapted for surgical instruments
- A61B2090/702—Devices for testing the cleaning process, e.g. test soils
Definitions
- the invention relates to a method and an applicator for the detection of the cleaning and / or disinfection of surfaces in areas in which a certain degree of purity is to be guaranteed, such as in the health care sector, the pharmaceutical industry and the manufacture of medical devices, according to the preambles of the claims 1 and 7.
- the contact picture shows a rough picture of the current number of bacteria at the time of the contact picture, but it is unsuitable to specify the quality of the cleaning and disinfection itself with sufficient accuracy.
- an indicator is proposed in DE 2810542 A1 in which a reagent is embedded in the pores of a filter paper and changes color when an action threshold is reached. The object of the invention cannot be achieved with this method because the indicator is only suitable for detecting the action of water vapor and formaldehyde at the same time.
- the principle of embedding the test chemical is also unsuitable because a substance that is embedded in the pores of a filter paper cannot be effectively removed there without destroying the filter paper and because partial cleanings are also not shown and also not quantified can.
- the present invention therefore has a method specified in claim 1, in which applicators have on the front a coating with a test contamination which, due to the cleaning and / or disinfection method, does not, partially or entirely, in the area of exposure to cleaning and / or disinfection be cleaned, a subsequent evaluation process measuring the result of the partial cleaning and / or partial disinfection and indicating it quantitatively.
- a method is therefore proposed in which coatings of surfaces of the applicators attached for the detection of cleaning and / or disinfection in the surface area of the action are also removed by the cleaning method and / or are changed by the disinfection method such that the subsequent evaluation gives a constant measure of the partial action.
- carriers with coatings are only proposed for the detection of disinfection, which have a coating that also gradually discolors when exposed to a disinfectant, depending on how far the disinfectant diffuses into the surface of the coating. The coating remains intact.
- This method assumes a connection between the disinfectant effect and the degree of color change brought about after diffusion of the disinfectant and, moreover, is not suitable for solving the problem according to the invention, at the same time demonstrating the cleaning quantified.
- the test contamination is also cleaned by the cleaning method and the disinfection effect is measured by quantitative determination of the proportion of active germs no longer present in the coating according to claims 1 to 3 and 6.
- the object of the invention is therefore to provide a method and an applicator with which or by which the success of the cleaning and / or disinfection is "frozen" at the time of its implementation, the information about the success of the cleaning and / or disinfection quantitatively in the form of a Quality figure is given, there are few sources of error and few opportunities for error propagation when using, and there is a possibility of variation so that the environmental pollution is represented in a representative and repeatable manner with regard to its cleaning and infection-relevant properties.
- the method and applicator according to the invention make it possible to directly check the effectiveness of the cleaning and / or disinfection of surfaces.
- the carriers of the hospitals, municipal and other areas in which the invention is to be used have a great need for a measurement method of the properties described.
- the building cleaning companies and the flushing Tomato manufacturers are interested in using the method according to the invention for internal quality assurance and in acquiring corresponding indicators.
- the devices and surfaces to be examined are preferably medical and / or surgical devices used in the laboratory and hospital, as well as furniture and floors.
- the invention is intended to ensure an objective, quantitative assessment of the cleaning and / or disinfection process.
- the applicators cleaning and / or disinfection indicators
- the applicators according to the invention are fixed on the surfaces and / or objects to be treated before the process to be tested. After the cleaning and disinfection process, the applicators are detached from the surfaces and / or objects and analyzed. In addition or as an alternative to this, the applicators can also be subjected to an advanced, also qualitative, evaluation or analysis directly on the surfaces and / or objects.
- Plastic, preferably metal and ceramic, which has adhesive properties on the underside, is preferably used as the carrier material.
- the plastic or metal can be flexible so as to ensure attachment to non-flat surfaces. A fixation can also be done mechanically, for example by screws or rivets on the device.
- the surface of the carrier material is preferably 2 cm 2 to 50 cm 2 . If the carriers are self-adhesive labels, they are round or angular. Hexagonal adhesive labels have the advantage that they can be placed on a label carrier without waste.
- the carriers are coated with a defined amount of test contamination with a defined recipe, which can be applied flat or in drops.
- a carrier with its coating forms an indicator.
- Such an even coating in connection with a defined recipe is a necessary prerequisite for the indicators to always offer the same resistance to the cleaning process and thus only to be able to quantify the cleaning success via the extent of cleaning (see: L. Jatzwauk , H. Schöne, Ultrasound - an important but not yet standardized factor in instrument reprocessing, in: aseptica 2/2000).
- the test contamination can be applied from the same material with layers of different colors in order to determine the quantity of the cleaning and / or disinfecting effect.
- the different coloring is achieved by adding a different dye in a low concentration to the same basic substance. If the indicator is now not cleaned completely, but only partially, a criterion for the quantity of cleaning is formed from this, depending on which layers appear, which can be visualized semi-quantitatively on the indicator.
- a layer is made more visible by contact with a chemical, for example a layer containing starch can have a color change by spraying iodine according to the invention, which can be easily recognized by the naked eye.
- the cleaning success is shown on the still attached indicator by the fact that when iodine is sprayed onto the indicator there is no longer a change in color. This means that you only have to replace and analyze those indicators that have a color change, which means that the analysis effort can be reduced.
- the fact that the indicators are only noticeable after spraying with iodine makes this variant suitable for surface cleaning and disinfection, if there is otherwise a risk that the cleaning staff would prefer to clean the indicators and avoid control.
- the spraying according to the invention is to be carried out using a template which covers the immediate vicinity and the edge of the indicator.
- phenolphathalein C 2 oH ⁇ 4 0 4
- solution 0.1% in ethanol is applied to a transparent support. After the ethanol has evaporated during the production of the indicators, transparent phenolphathalein single crystals remain.
- contact according to the invention with a basic contact substance after cleaning / disinfection with a pH between 8.0 and 10.1, such as 0.1 M sodium hydroxide solution, there is a change in color. hit bright pink instead. Those indicators that show this change in color can then be replaced and further analyzed.
- the phenolphathelein is with other substances that form the layer and represent real contaminants, such as e.g. a mixture of starch and protein, mixed.
- the cleaning success is interpreted and evaluated in the manner described above.
- a layering according to the invention consisting of different materials in different order of these layers is also possible.
- properties such as heat resistance, swellability, solubility in alcohol and solubility in water are to be investigated, which are depicted by the appropriate choice of material for the layers.
- the application of the individual layers is also preferably carried out here by the mechanical screen printing process, or by spraying or immersion.
- the layers according to the invention can be different in the choice of material, but they can also be similar and can be adjusted so that the layers above provide a somewhat lower resistance to the cleaning process than the layers below.
- the test contamination depends on the prevailing contamination in the area to be tested.
- the method according to the invention is divided into at least three different product variants with the following sub-variants on account of its different possible uses and the test contaminations associated therewith.
- organic contamination should preferably be used for the health and social sectors.
- the basic substance contains serum albumin or another protein, mucin or another carbohydrate and glycerin, in each case preferably in 0.001 to 5% solutions in water.
- Methyl orange or another water-soluble, non-harmful dye is mixed into this basic substance (sub-variant A1).
- the labels are preferably self-adhesive labels in a round or hexagonal shape. The dye is left out in sub-variant A2, in this case the indicator is brought into contact with potassium iodide after cleaning. Remains of starch then cause a color change reaction, which can be used to determine whether test stains were still present.
- the chemical is iodine, it should preferably be sprayed onto the surface of the indicators. However, it can also be wiped up, for example with a sponge, felt or tissue.
- phenolphataline is mixed into the basic substance instead of a dye.
- a check is carried out as to whether residues of the layer are still present on the support after cleaning, as in A2 as long as the supports are still attached to the surfaces to be cleaned.
- the control is carried out by contact with an aqueous solution in the pH range from 8.0 to 10.1. Those indicators that show a change in color are replaced and analyzed.
- Variant B should preferably be used for the municipal area. Water or ethanol serve as the basic substance, methyl orange as an indicator of sub-variant B1 or another suitable water-soluble dye that is not harmful to health.
- the carrier is preferably a self-adhesive, transparent plastic label which is coated with phenolphatalein in a uniform layer thickness, preferably by defined spraying. After cleaning, as with A3, the indicators are brought into contact with an alkali, and the discolored indicators are removed and further analyzed.
- the cleaning and / or disinfection indicators are introduced into sample vessels with a defined amount of a buffer solution (for example phosphate buffer). This removes the test contamination with the dye it contains.
- a buffer solution for example phosphate buffer.
- the residual amount of contaminants can be determined by colorimetric measurement (absorption and transmission) and specific calibration curves or by a visual comparison of the solutions with a given color scale. determination.
- the residual amount of test contamination is a function of the cleaning intensity.
- the indicators are coated with differently colored layers of a similar basic formulation
- the colors of the successive layers can advantageously be suitably, e.g. can be selected in successive colors or hues of the color circle, so that the colorimetric measurement provides a sufficiently sensitive color signal for the remaining layer thickness.
- Variant C serves as a disinfectant indicator.
- Serum albumin or another protein, mucin or another carbohydrate, glycerin and, in sub-variant C1, methyl orange or another water-soluble, non-harmful and non-antimicrobial dye should be used as the basic substance, preferably in 0.001 to 5% solutions in water.
- ⁇ X174 or other non-human pathogenic bacteriophages (bacterial virus) in pure culture serve as an indicator.
- the cleaning and disinfection indicators are introduced into sample vessels with a defined amount of a buffer solution. This removes the test contamination with the bacteriophages it contains.
- the inactivation of the indicator viruses can be quantified as a logarithmic reduction factor (RF value).
- the RF values are functions of a decontamination of the surfaces that has taken place. These values are specific to disinfectants. Taking into account the results of the cleaning and disinfection indicators of variants A and B, statements can be made about disinfection.
- Variant C2 does not contain any dye, otherwise variant C1, variant C3 contains phenolphatalein.
- a further embodiment of the invention should consist in the fact that the color tone does not differ, or differs only slightly, from the color tone of the surrounding surfaces to be cleaned. In this way it can be prevented that the cleaning staff prefers to clean only the indicators.
- segments of the indicators of all variants can additionally be covered with insoluble cover layers. These resist cleaning and, after cleaning, enable the starting layer to be traced, which means that deviations in the thickness of the screen printing can be documented and thus compensated for when evaluating the indicator.
- FIG. 1 and 2 show exemplary embodiments of the applicator on a surface or object to be cleaned / disinfected.
- a surface or object to be cleaned / disinfected here mean:
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU30014/01A AU3001401A (en) | 1999-12-22 | 2000-12-22 | Method and applicator for detecting cleaning and/or disinfection of surfaces or objects |
DE10083993T DE10083993D2 (de) | 1999-12-22 | 2000-12-22 | Verfahren und Applikator zum Nachweis der Reinigung und/oder Desinfektion von Flächen oder Gegenständen |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19962148.9 | 1999-12-22 | ||
DE19962148A DE19962148A1 (de) | 1999-12-22 | 1999-12-22 | Verfahren zum quantitativen Nachweis der Reinigung mit oder ohne Desinfektion von Flächen oder Gegenständen |
DE10065941.1 | 2000-12-21 | ||
DE10065941A DE10065941A1 (de) | 1999-12-22 | 2000-12-22 | Verfahren und Applikator zum Nachweis der Reinigung und/oder Desinfektion von Flächen oder Gegenständen |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001045755A2 true WO2001045755A2 (de) | 2001-06-28 |
WO2001045755A3 WO2001045755A3 (de) | 2002-03-14 |
Family
ID=26008137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/004583 WO2001045755A2 (de) | 1999-12-22 | 2000-12-22 | Verfahren und applikator zum nachweis der reinigung und/oder desinfektion von flächen oder gegenständen |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU3001401A (de) |
DE (1) | DE10083993D2 (de) |
WO (1) | WO2001045755A2 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003052405A1 (en) * | 2001-12-17 | 2003-06-26 | Cleansolve Holding Aps | Method of determining the cleanness of a surface |
EP1769808A2 (de) * | 2005-09-30 | 2007-04-04 | Ethicon, Inc. | Indikator zum Überwachen eines Reinigungsverfahrens |
WO2008019715A1 (de) | 2006-08-14 | 2008-02-21 | Pach Helmut | Vorrichtung zur überprüfung des reinigungs- und desinfektionsergebnisses bei insbesondere in waschautomaten gereinigten diagnostischen und chirurgischen instrumenten |
WO2011079839A3 (de) * | 2009-12-29 | 2011-10-20 | 3Mach Gmbh | Anschmutzung |
WO2020086293A1 (en) * | 2018-10-23 | 2020-04-30 | Ecolab Usa Inc. | Verification of cleaning processes with electronically readable coded coupon |
CN112763428A (zh) * | 2020-12-29 | 2021-05-07 | 中国航空工业集团公司西安飞机设计研究所 | 飞机表面沉积型污染物的模拟生成及清洁效率试验方法 |
CN113976510A (zh) * | 2021-10-25 | 2022-01-28 | 顾濳刚 | 一种用于医疗器械清洗监测方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2414654T3 (es) * | 2009-02-05 | 2013-07-22 | Danja Kaiser | Indicador de limpieza y cuerpo de test para el ensayo de procesos de limpieza |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3311084A (en) * | 1964-12-24 | 1967-03-28 | Johnson & Johnson | Indicator tape |
DE4101731A1 (de) * | 1991-01-22 | 1992-07-23 | Joerg Peter Prof Dr Schuer | Verfahren und einrichtung zur ueberpruefung der wirksamkeit der geschirrspuelung |
WO1993024152A1 (en) * | 1992-05-28 | 1993-12-09 | Minnesota Mining And Manufacturing Company | Indicator tapes and methods |
DE19602673A1 (de) * | 1996-01-25 | 1997-08-07 | Pereg Gmbh | Synthetische Testanschmutzung |
DE19649925A1 (de) * | 1996-12-02 | 1998-06-04 | Intermedical S A H | Verfahren zur quantitativen Prüfung der Reinigung von Gegenständen |
WO1998040736A1 (en) * | 1997-03-10 | 1998-09-17 | Steris Corporation | Apparatus for the assessment and validation of cleaning processes |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2773493B2 (ja) * | 1991-03-19 | 1998-07-09 | 凸版印刷株式会社 | 高圧殺菌用インジケーター |
-
2000
- 2000-12-22 DE DE10083993T patent/DE10083993D2/de not_active Expired - Fee Related
- 2000-12-22 AU AU30014/01A patent/AU3001401A/en not_active Abandoned
- 2000-12-22 WO PCT/DE2000/004583 patent/WO2001045755A2/de active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3311084A (en) * | 1964-12-24 | 1967-03-28 | Johnson & Johnson | Indicator tape |
DE4101731A1 (de) * | 1991-01-22 | 1992-07-23 | Joerg Peter Prof Dr Schuer | Verfahren und einrichtung zur ueberpruefung der wirksamkeit der geschirrspuelung |
WO1993024152A1 (en) * | 1992-05-28 | 1993-12-09 | Minnesota Mining And Manufacturing Company | Indicator tapes and methods |
DE19602673A1 (de) * | 1996-01-25 | 1997-08-07 | Pereg Gmbh | Synthetische Testanschmutzung |
DE19649925A1 (de) * | 1996-12-02 | 1998-06-04 | Intermedical S A H | Verfahren zur quantitativen Prüfung der Reinigung von Gegenständen |
WO1998040736A1 (en) * | 1997-03-10 | 1998-09-17 | Steris Corporation | Apparatus for the assessment and validation of cleaning processes |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 017, no. 236 (C-1057), 13. Mai 1993 (1993-05-13) & JP 04 365499 A (TOPPAN PRINTING CO LTD), 17. Dezember 1992 (1992-12-17) * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003052405A1 (en) * | 2001-12-17 | 2003-06-26 | Cleansolve Holding Aps | Method of determining the cleanness of a surface |
EP1769808A2 (de) * | 2005-09-30 | 2007-04-04 | Ethicon, Inc. | Indikator zum Überwachen eines Reinigungsverfahrens |
EP1769808A3 (de) * | 2005-09-30 | 2007-09-12 | Ethicon, Inc. | Indikator zum Überwachen eines Reinigungsverfahrens |
WO2008019715A1 (de) | 2006-08-14 | 2008-02-21 | Pach Helmut | Vorrichtung zur überprüfung des reinigungs- und desinfektionsergebnisses bei insbesondere in waschautomaten gereinigten diagnostischen und chirurgischen instrumenten |
WO2011079839A3 (de) * | 2009-12-29 | 2011-10-20 | 3Mach Gmbh | Anschmutzung |
WO2020086293A1 (en) * | 2018-10-23 | 2020-04-30 | Ecolab Usa Inc. | Verification of cleaning processes with electronically readable coded coupon |
US11498099B2 (en) | 2018-10-23 | 2022-11-15 | Ecolab Usa Inc. | Verification of cleaning processes with electronically readable coded coupon |
US11794216B2 (en) | 2018-10-23 | 2023-10-24 | Ecolab Usa Inc. | Verification of cleaning processes with electronically readable coded coupon |
CN112763428A (zh) * | 2020-12-29 | 2021-05-07 | 中国航空工业集团公司西安飞机设计研究所 | 飞机表面沉积型污染物的模拟生成及清洁效率试验方法 |
CN112763428B (zh) * | 2020-12-29 | 2023-06-23 | 中国航空工业集团公司西安飞机设计研究所 | 飞机表面沉积型污染物的模拟生成及清洁效率试验方法 |
CN113976510A (zh) * | 2021-10-25 | 2022-01-28 | 顾濳刚 | 一种用于医疗器械清洗监测方法 |
Also Published As
Publication number | Publication date |
---|---|
WO2001045755A3 (de) | 2002-03-14 |
DE10083993D2 (de) | 2003-08-28 |
AU3001401A (en) | 2001-07-03 |
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