WO1997048420A1 - Chambre de sterilisation - Google Patents

Chambre de sterilisation Download PDF

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Publication number
WO1997048420A1
WO1997048420A1 PCT/SE1997/001051 SE9701051W WO9748420A1 WO 1997048420 A1 WO1997048420 A1 WO 1997048420A1 SE 9701051 W SE9701051 W SE 9701051W WO 9748420 A1 WO9748420 A1 WO 9748420A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
sterilization chamber
walls
pressure
vacuum
Prior art date
Application number
PCT/SE1997/001051
Other languages
English (en)
Inventor
Göran Palmers
Original Assignee
Tsp Medical Ab
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 Tsp Medical Ab filed Critical Tsp Medical Ab
Priority to PL97330733A priority Critical patent/PL330733A1/xx
Priority to EP97928591A priority patent/EP0923384A1/fr
Priority to AU32810/97A priority patent/AU3281097A/en
Priority to JP10502792A priority patent/JP2000513958A/ja
Priority to BR9709739A priority patent/BR9709739A/pt
Publication of WO1997048420A1 publication Critical patent/WO1997048420A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/04—Pressure vessels, e.g. autoclaves
    • 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
    • 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
    • A61L2/04—Heat
    • A61L2/06—Hot gas
    • A61L2/07—Steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor

Definitions

  • the present invention refers to a sterilization chamber for autoclaves and of the type in which the sterilization process incorporates treatment of the goods to be sterilized with alternating temperature and pressure variations, with the pressure varying between overpressure and vacuum suction, and which is provided with a wall structure incorporating an inner wall and an outer wall arranged spaced apart therefrom, whereby an intermediate space is formed between the two walls.
  • Autoclaves are used for sterilization of different types of goods, e.g. surgical and dental instruments, whereby the goods during a short period of time shall be heated with water steam to a high temperature, usually 134°C and at a pressure of 2.1 bar. The goods shall furthermore be subjected to vacuum.
  • the sterilization chamber hereby is subjected to two contradictory requirements. It must have low heat capacity (kWs/kg degree), low heat conductivity (W/m degree) and it furthermore shall be strong. Due to the internal subpressure, which must be established in connection with the vacuum treatment of the goods, it is required that the sterilization chamber has thick walls, thus that it can withstand the internal subpressure without buckling.
  • the purpose of the present invention is to provide a sterilization chamber of the type mentioned in the introduction, which can have a thinner inner wall of high tensile steel compared to what has earlier been possible, at the same time as the requirement for a thick layer of insulation material is reduced, and this has been achieved in that said space between the walls of the chamber have a constant vacuum, which is lower than the lowest treatment pressure for which the sterilization chamber is intended, in order primarily to ascertain that the inner wall is not subjected to an internal subpressure and secondly for contributing to the heat insulation.
  • the figure shows in cross section a non-limiting embodiment of a sterilization chamber according to the invention, whereby the chamber has been shown without associated connections for vacuum, steam, cooling medium, etcetera.
  • the sterilization chamber 1 incorporates a strong outer wall 12, e.g. from structural steel, and in the embodiment shown shaped as a cylinder, which is closed off at one end by a dome-shaped portion, an inner wall of stainless, but considerably thinner material than the outer wall, and which inner wall is received inside the outer wall 2, thus that an intermediate space 4 is formed between inner wall 3 and outer wall 2.
  • the open end of the sterilization chamber rests against a planar, strong end wall 5 of substantially circular form, with a thin planar inner wall 6, provided at a distance from the outer end wall 5 and for increasing the load carrying capacity and the insulating power, the space between the end wall 5 and the inner wall 6, in the embodiment shown, is filled with an insulation 7, which has been subjected to vacuum suction.
  • a seal 8 positioned in a groove, here illustrated as a sealing ring having a circular cross section.
  • the intermediate space 4 between the inner wall 3 and the outer wall 2 of the chamber prevails a permanent, constant vacuum, which, when this space, in connection with the manufacture of the chamber, is hermetically sealed off, can be set to a level below the lowest pressure (subpressure) to which the interior of the sterilization chamber will be subjected in connection with the vacuum suction involved in the sterilization process, and this vacuum in the intermediate space will efficiently ascertain that the interior of the inner wall 3 never will be subjected to an overpressure acting from within and outwards in relation to the pressure in the intermediate space 4, i.e. also during vacuum suction of the interior of the sterilization chamber.
  • subpressure the lowest pressure
  • the inner wall 3 never will be subjected to an inner subpressure, the risk for this inner wall to buckle inwardly is not at hand, and from strength aspects the inner wall 3 therefore can be made rather thin.
  • the outer wall 2 on the other hand must be made thicker as it will be acted upon from within by the negative pressure difference, which is at hand between the intermediate space 4 and the surrounding atmosphere.
  • the entire chamber will operate as a vacuum insulated thermos, preferably at a pressure below 10 "2 mbar, which gives a good heat insulation only as a consequence of this low vacuum.
  • the intermediate space 4 between these curved wall sections can preferably also be provided with a (not shown) heat insulation. It has proven itself that the insulating materials used reduces their heat conductivity considerably in vacuum of the levels, which are constantly at hand in the space 4.
  • insulating materials can be mentioned, e.g. MICROTHERM, a microporous heat insulating material, or the porous fibre silicate board SUPRATHERM "L", which is marketed by the company Brandenburger Isoliertechnik GmbH % Co K.G..
  • MICROTHERM a microporous heat insulating material
  • SUPRATHERM "L” a microporous heat insulating material
  • Another appropriate material can be the hard glass fibre fabric BRA-GLA, which is also marketed by Brandenburger Isoliertechnik.
  • this lastmentioned material can be designed as a screen pattern, preferably in the form of a honeycomb structure. If this material has a heat conductivity of 0,22 W/mK it is possible to make high strength structures with a heat conductivity of about 0,0022 W/mK if a vacuum is at hand in the cavities of the honeycomb structure.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)

Abstract

Chambre de stérilisation pour autoclaves, dans laquelle le procédé de stérilisation consiste à traiter les articles à stériliser par variation alternée de température et de pression, la pression variant entre la surpression et la dépression. Ladite chambre comporte une structure de parois comprenant une paroi interne (3) et une paroi externe (2) espacées l'une de l'autre, un espace intermédiaire (4) étant prévu entre elles. Ledit espace (4) est fermé hermétiquement et contient un vide permanent et constant qui est inférieur à la pression de traitement la plus faible présente dans la chambre de stérilisation (1) de sorte que la paroi interne (3) ne soit pas exposée à une sous-pression interne et qu'une l'isolation thermique soit assurée.
PCT/SE1997/001051 1996-06-18 1997-06-16 Chambre de sterilisation WO1997048420A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PL97330733A PL330733A1 (en) 1996-06-18 1997-06-16 Sterilising chamber
EP97928591A EP0923384A1 (fr) 1996-06-18 1997-06-16 Chambre de sterilisation
AU32810/97A AU3281097A (en) 1996-06-18 1997-06-16 Sterilization chamber
JP10502792A JP2000513958A (ja) 1996-06-18 1997-06-16 滅菌チャンバ
BR9709739A BR9709739A (pt) 1996-06-18 1997-06-16 Câmara de esterilização

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602397A SE506524C2 (sv) 1996-06-18 1996-06-18 Steriliseringskammare
SE9602397-3 1996-06-18

Publications (1)

Publication Number Publication Date
WO1997048420A1 true WO1997048420A1 (fr) 1997-12-24

Family

ID=20403048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/001051 WO1997048420A1 (fr) 1996-06-18 1997-06-16 Chambre de sterilisation

Country Status (8)

Country Link
EP (1) EP0923384A1 (fr)
JP (1) JP2000513958A (fr)
KR (1) KR20000016809A (fr)
AU (1) AU3281097A (fr)
BR (1) BR9709739A (fr)
PL (1) PL330733A1 (fr)
SE (1) SE506524C2 (fr)
WO (1) WO1997048420A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1266665A1 (fr) * 2001-06-13 2002-12-18 Getinge Skärhamn AB Dispositif pour un autoclave
EP4306135A1 (fr) 2022-07-13 2024-01-17 MELAG Medizintechnik GmbH & Co. KG Stérilisateur à vapeur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1347008A (fr) * 1962-07-27 1963-12-27 Cie Generale Du Vide Perfectionnements aux enceintes étanches pour ultra-vide

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1347008A (fr) * 1962-07-27 1963-12-27 Cie Generale Du Vide Perfectionnements aux enceintes étanches pour ultra-vide

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1266665A1 (fr) * 2001-06-13 2002-12-18 Getinge Skärhamn AB Dispositif pour un autoclave
WO2002100446A1 (fr) * 2001-06-13 2002-12-19 Getinge Skärhamn AB Dispositif pour autoclave
EP4306135A1 (fr) 2022-07-13 2024-01-17 MELAG Medizintechnik GmbH & Co. KG Stérilisateur à vapeur
EP4316530A1 (fr) 2022-07-13 2024-02-07 MELAG Medizintechnik GmbH & Co. KG Stérilisateur à vapeur

Also Published As

Publication number Publication date
SE506524C2 (sv) 1997-12-22
SE9602397L (sv) 1997-12-19
KR20000016809A (ko) 2000-03-25
AU3281097A (en) 1998-01-07
SE9602397D0 (sv) 1996-06-18
PL330733A1 (en) 1999-05-24
EP0923384A1 (fr) 1999-06-23
JP2000513958A (ja) 2000-10-24
BR9709739A (pt) 1999-08-10

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