WO2005099777A1 - Procede et dispositif de sterilisation d'instruments et d'appareils chirurgicaux - Google Patents

Procede et dispositif de sterilisation d'instruments et d'appareils chirurgicaux Download PDF

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Publication number
WO2005099777A1
WO2005099777A1 PCT/CH2005/000072 CH2005000072W WO2005099777A1 WO 2005099777 A1 WO2005099777 A1 WO 2005099777A1 CH 2005000072 W CH2005000072 W CH 2005000072W WO 2005099777 A1 WO2005099777 A1 WO 2005099777A1
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WO
WIPO (PCT)
Prior art keywords
sterilization chamber
ozone
valve
outlet valve
sterilization
Prior art date
Application number
PCT/CH2005/000072
Other languages
German (de)
English (en)
Inventor
Detlef Kersting
Beat Von Weissenfluh
Original Assignee
Technomedical S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Technomedical S.A. filed Critical Technomedical S.A.
Publication of WO2005099777A1 publication Critical patent/WO2005099777A1/fr

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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
    • A61L2/16—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
    • A61L2/202—Ozone
    • 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

Definitions

  • the invention relates to a method for sterilizing surgical cutlery, devices and instruments for medicine, dentistry and veterinary medicine using ozone and a control device, the ozone being introduced into a sterilization chamber to which a controlled inlet valve and a controlled outlet valve are connected, and the Ozone is introduced into the sterilization chamber via the inlet valve and withdrawn from it via the outlet valve.
  • the invention also relates to a device for sterilizing surgical cutlery, devices and instruments for medicine, dentistry, veterinary medicine using ozone and a control device, with an inlet valve and an outlet valve, which are connected to a sterilization chamber and with a vacuum source.
  • Steam sterilizers are known for the sterilization of chirargic cutlery, devices and instruments, but are not very popular with the operators, since burns often occur when the instruments are removed from the sterilization chamber.
  • Steam sterilizations with a volume greater than 15 liters are also pressure vessels in the sense of accident prevention regulations and must be checked regularly, which causes comparatively high costs.
  • Sterilizers which work with toxic gases, for example ETO, which have to be removed from a drain bottle are also known.
  • the disadvantage here is that filters in which the gas must be completely absorbed must be disposed of as hazardous hazardous waste. This is expensive and involves great risks.
  • Plasma sterilizers are also known, but are much more expensive to manufacture and operate than ozone sterilizers.
  • the invention has for its object to provide a method and an apparatus which are even more effective and yet safe.
  • the object is achieved in a generic method in that the ozone is passed through the sterilization chamber in a controlled flow. Tests have shown that this can further increase the ozone concentration. For example, ozone concentrations of about 30 to 40 g / m 3 are possible here.
  • the temperature in the sterilization chamber does not have to be increased and is, for example, room temperature. The sterilized instruments can thus be removed from the sterilization chamber without the risk of burns.
  • the pressure in the sterilization chamber is varied.
  • the flow rate does not work with constant, but with changing pressure in the sterilization chamber. This has the surprising effect that cells are killed and more effectively Prions can be disabled.
  • the pressure is changed periodically, for example sinusoidally.
  • the method is operated with air.
  • Figure 1 is a block diagram of the inventive device
  • Figure 2 is a view of the inventive device.
  • FIG. 1 The block diagram of the device according to the invention shown in FIG. 1 shows a sterilization chamber 1, which is closed with a lid 2 and in which a mesh basket 3 is arranged to accommodate the items not shown here.
  • the cover 2 is pivotally attached to a housing 29 with a hinge according to FIG.
  • the lid 2 closes the sterilization chamber in a vacuum-tight manner.
  • the inside of the sterilization chamber 1 is coated with a barrier layer, not shown here, so that the ozone cannot react on these surfaces.
  • the items to be sterilized are arranged in the mesh basket 3 so that they can be completely flooded with ozone.
  • the sterilization chamber 1 is configured in such a way that even long instruments, such as endoscopes etc., are accommodated therein and can be sterilized.
  • the ozone required for the sterilization is generated in an ozone generator 8 adjustable in a required concentration of 10 to 40 g / m 3 .
  • the air required for ozone generation is sucked in through an air filter 4 or 32 (FIG. 2).
  • a dehumidifier 6 the moisture is extracted from the air in order to ensure a stable Obtain ozone concentration.
  • the dehumidifier 6 can alternatively be a commercially available humidifier (less than 15% RH), which humidifies the inflowing gas, in particular normal laboratory air or oxygen. Humidifying the air can produce more nitrogen oxide.
  • a needle valve 7 arranged after the dehumidifier 6 regulates the gas flow in the ozone generator 8 to a stable air flow.
  • a line 18 connects the needle valve 7 to the ozone generator 8.
  • dry synthetic air enriched with oxygen can be obtained from a gas container 9 via a manual valve 5.
  • the gas container 9 is provided with a pressure / flow regulator 10. In such an operating mode, the dehumidifier 6 is not required.
  • the ozone generated in the ozone generator 8 is introduced into the sterilization chamber 1 via a three / two-way solenoid valve 12.
  • the introduction takes place continuously, the sterilization chamber 1 being evacuated and having a pressure of, for example, 200-300 hPa.
  • the connection between the solenoid valve 12 and the sterilization chamber 1 is made with a line 11, which is formed by a suitable tube, which is preferably also coated on the inside.
  • the required vacuum in the sterilization chamber 1 is generated with a diaphragm pump 25.
  • the diaphragm pump 25 draws in the ozone through a particle filter 28 which is arranged in front of a two-way solenoid valve 15 in the sterilization chamber 1.
  • the extracted ozone passes through a line 18 into a thermoscrubber 16, in which the ozone reacts to normal oxygen in the air.
  • the thermal scrubber 16 acts as a catalyst and is provided with a drain sensor 22 and a temperature sensor 24 for its control.
  • the largely depleted air is passed through a mass flow controller 17 which controls the mass flow through the device.
  • a manganese dioxide scrubber 26 arranged before or after the membrane pump 25 removes any residual ozone.
  • the diaphragm pump 25 is connected to the ambient air via a silencer 27.
  • the ozone concentration in the sterilization chamber 1 is measured with a sensor system that includes an ozone sensor 20, a pressure sensor 22 and a temperature Sensor 21 has.
  • Other means for determining the ozone concentration in the sterilization chamber 1 are also conceivable here.
  • the devices and instruments placed in the sterilization chamber 1 are freely washed around by the ozone and the bacteria and viruses adhering to them are thereby killed off, for example within 20-30 minutes.
  • the sterilization chamber 1 is flushed with nitrogen.
  • This nitrogen is taken from a gas container 14 to which a pressure / flow regulator 13 is connected.
  • the nitrogen is introduced via the three-two-way solenoid valve 12, which is regulated by control electronics 19.
  • the entire device is controlled with this control and control electronics 19. It essentially consists of a control and process section, not specified here, and a DC power converter.
  • the device according to FIG. 2 has a display 30, for example an LCD display and an input field 31.
  • the sterilization process and the nitrogen purge can be controlled and the sterilization time can be set.
  • Keys 36, 37 and 38 are provided for switching on the diaphragm pump 25 and the thermal scrubber 15.
  • the switch-on control takes place via corresponding control lights 33, 34 and 35.
  • the sterilization chamber 1 and the above-mentioned elements are accommodated in a housing 29 to which the cover 2 is fastened.
  • the flow of ozone is passed through the sterilization chamber 1. During the sterilization and possibly after the pre-rinse, ozone thus flows continuously into the sterilization chamber 1 and away from it to the valve 15.
  • the mass flow of the ozone through the sterilization chamber 1 is regulated by the mass flow controller 17.
  • the gas flow into the ozone generator 8 is regulated accordingly, so that sufficient ozone is always available at the outlet of the inlet valve 12.
  • the ozone is introduced at a reduced pressure in the range of approximately 100-300 hPa. This pressure can be essentially constant or change periodically over time. Such drainage rods can increase the effect of ozone on the cells to be killed.
  • the higher effect is that the cells or cell membranes open under the varying pressure and are therefore stronger are exposed to ozone. It can also make prions more effective. Operation in the culvert also has the advantage that the ozone concentration can be increased significantly, for example to 30-40 g / m 3 .
  • the pressure in the sterilization chamber 1 is changed, for example, cyclically 3 to about 20 times within a sterilization period of 1 hour.
  • the pressure changes here, for example, between 1000 hPa and 100 hPa, a lower pressure of, for example, 40 hPa also being achievable using a correspondingly low-noise vacuum pump 25.
  • the time period within which the pressure can be reduced from, for example, 1000 hPa to 100 hPa is likewise particularly dependent on the performance of the vacuum pump 25 and is, for example, 5 minutes.
  • the increase from the lowest to the highest pressure by introducing ozone can take place in a much shorter time span of a few seconds. The number of cycles is therefore largely dependent on the length of time in which the pressure can be reduced.
  • an injection device 39 is arranged on the sterilization chamber 1, with which water can be metered into the sterilization chamber 1 via a pipe connection 40.
  • the injection device 39 can be a commercially available metering system.
  • the pipe connection 40 is connected to a coupling, which is not shown here in medical technology and is known per se.
  • the amount of water is a few milligrams and is injected into the evacuated sterilization chamber 1. This water opens certain microorganisms, for example spore fungi, and can thus be killed by the ozone. If the presence of such microorganisms can be ruled out, water may not be injected.
  • the injection device 39 can be arranged on the housing of the sterilization chamber 1 or also on the cover 2. It would also be possible to introduce water through line 11. LIST OF REFERENCE NUMBERS
  • Ozone generator 28 particulate filter
  • Drack / flow controller 30 display
  • Mass flow controller 37 keys

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

L'invention concerne un procédé de stérilisation à l'ozone selon lequel l'ozone est acheminé à travers une chambre de stérilisation (1) à laquelle sont raccordées une soupape d'admission (12) commandée et une soupape de sortie (15) commandée. L'ozone est introduit par la soupape d'admission (12) et évacué par la soupape de sortie (15). L'ozone est de préférence acheminé à travers la chambre de stérilisation (1) avec un débit régulé, ladite chambre de stérilisation (1) étant lavée au moyen d'un gaz, de préférence de l'azote, avant le processus de stérilisation. L'avantage du débit régulé d'ozone à travers la chambre de stérilisation (1) est que la concentration d'ozone peut être augmentée, par exemple de 30 à 40 g/m3.
PCT/CH2005/000072 2004-04-13 2005-02-10 Procede et dispositif de sterilisation d'instruments et d'appareils chirurgicaux WO2005099777A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6392004 2004-04-13
CH639/04 2004-04-13

Publications (1)

Publication Number Publication Date
WO2005099777A1 true WO2005099777A1 (fr) 2005-10-27

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Application Number Title Priority Date Filing Date
PCT/CH2005/000072 WO2005099777A1 (fr) 2004-04-13 2005-02-10 Procede et dispositif de sterilisation d'instruments et d'appareils chirurgicaux

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WO (1) WO2005099777A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106214275A (zh) * 2016-09-22 2016-12-14 李博 牙科治疗仪

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120512A (en) * 1986-02-24 1992-06-09 Senichi Masuda Apparatus for sterilizing objects to be sterilized
US5868999A (en) * 1996-03-19 1999-02-09 Ozone Sterilization Products, Inc. Ozone sterilizer and method for ozone sterilization
WO1999032162A1 (fr) * 1997-12-23 1999-07-01 Carmen Gary B REDUCTION DYNAMIQUE DE LA CHARGE BIOLOGIQUE PAR O¿x?
WO2003039607A1 (fr) * 2001-11-08 2003-05-15 Tso3 Inc. Procede et dispositif de sterilisation a l'ozone
US20030133832A1 (en) * 2001-12-31 2003-07-17 D'ottone Luca Sterilization and detoxification of confined spaces
DE10208308A1 (de) * 2002-02-26 2003-09-04 Detlef Kersting Vorrichtung und Verfahren zur Sterilisation chirurgischer Bestecke und medizinischer Instrumente

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120512A (en) * 1986-02-24 1992-06-09 Senichi Masuda Apparatus for sterilizing objects to be sterilized
US5868999A (en) * 1996-03-19 1999-02-09 Ozone Sterilization Products, Inc. Ozone sterilizer and method for ozone sterilization
WO1999032162A1 (fr) * 1997-12-23 1999-07-01 Carmen Gary B REDUCTION DYNAMIQUE DE LA CHARGE BIOLOGIQUE PAR O¿x?
WO2003039607A1 (fr) * 2001-11-08 2003-05-15 Tso3 Inc. Procede et dispositif de sterilisation a l'ozone
US20030133832A1 (en) * 2001-12-31 2003-07-17 D'ottone Luca Sterilization and detoxification of confined spaces
DE10208308A1 (de) * 2002-02-26 2003-09-04 Detlef Kersting Vorrichtung und Verfahren zur Sterilisation chirurgischer Bestecke und medizinischer Instrumente

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106214275A (zh) * 2016-09-22 2016-12-14 李博 牙科治疗仪
CN106214275B (zh) * 2016-09-22 2017-07-04 李博 牙科治疗仪

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