EP0186730A2 - Procédé pour obtenir un courant d'air stérile et appareil producteur d'atmosphère stérile - Google Patents

Procédé pour obtenir un courant d'air stérile et appareil producteur d'atmosphère stérile Download PDF

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Publication number
EP0186730A2
EP0186730A2 EP85110123A EP85110123A EP0186730A2 EP 0186730 A2 EP0186730 A2 EP 0186730A2 EP 85110123 A EP85110123 A EP 85110123A EP 85110123 A EP85110123 A EP 85110123A EP 0186730 A2 EP0186730 A2 EP 0186730A2
Authority
EP
European Patent Office
Prior art keywords
clean room
air
generator according
flow
clean
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.)
Granted
Application number
EP85110123A
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German (de)
English (en)
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EP0186730A3 (en
EP0186730B1 (fr
Inventor
Zinon Dr. Duvlis
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Individual
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Individual
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 Individual filed Critical Individual
Priority to AT85110123T priority Critical patent/ATE53290T1/de
Publication of EP0186730A2 publication Critical patent/EP0186730A2/fr
Publication of EP0186730A3 publication Critical patent/EP0186730A3/de
Application granted granted Critical
Publication of EP0186730B1 publication Critical patent/EP0186730B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A61G13/108—Means providing sterile air at a surgical operation table or area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains

Definitions

  • the invention relates to a method for aligning a clean stream of sterile air which emerges from at least one air outlet opening and tangentially envelops an operating field.
  • the object of the present invention is therefore to improve the method of the type mentioned in the introduction in such a way that the operating field is tightly enveloped by germ-free air.
  • This object is achieved in that the clean room flow is thermally stabilized.
  • the clean room flow is directed by a secondary air flow.
  • This secondary air flow impinges on the clean room flow at a predetermined angle and influences it in a direction suitable for the respective application.
  • the clean room flow flows tangentially around the operating field.
  • This tangential alignment has the effect that the operating field is enveloped very close to the clean room flow without the operating field drying out.
  • Appropriate alignment of the secondary air flow allows the clean room flow to be directed in any direction. For example, it is conceivable to direct the secondary air flow vertically upward from the operating table in order to direct the clean room flow in a direction that points away from the operating table.
  • Another object of the present invention is therefore to improve a clean room generator for generating a clean room with the aid of a germ-free air flow, which is oriented tangentially from at least one air outlet opening of a fan head to an operating field, so that it manages with a moderate fan output.
  • this object is achieved in that the air flow is thermized with respect to ambient air surrounding it.
  • the air flow is cooled in relation to the ambient air. This cooling is sufficient if the temperature of the clean room flow is only slightly below that of the ambient air.
  • the clean room flow can therefore possibly be cooled with a water-cooled heat exchanger. The heat given off by the clean room flow to the water can possibly be used. In this way, very effective bundling of the clean room flow can be achieved with cheap means.
  • the air flow is heated in relation to the ambient air. Even when the clean room flow is heated, only a slight temperature difference from the ambient air is sufficient to bring about a good concentration of the clean room flow. This heating of the air flow expediently takes place in the immediate vicinity of the air outlet opening, so that the air flow is precisely bundled with the ambient air even after it exits the air outlet opening.
  • a clean room generator essentially consists of a clean air generator 1 and a fan head 2, which is connected to the clean air generator 1 via at least one flexible hose 3.
  • the fan head 2 rises above an operating table 21. It can be movably connected to it. With regard to a plane spanned by the operating table 21, the fan head 2 can be fastened in a pivotable manner as well as displaceable in the direction of the operating table 21. In addition, it is conceivable to fasten the fan head 2 to a holder which is independent of the operating table 21, so that it can be adjusted with respect to the surface of the operating table 21 in such a way that an operating field 2o is flowed against tangentially.
  • This operating field 20 can be provided at a selected point on a human body, which lies on the operating table 21 as a patient 22.
  • the tangential flow against the operating field 2o has the result that it is screened from an air stream 19 flowing out of the fan head 2 against an ambient air surrounding the air stream 19 in a germ-free manner.
  • the tangential flow has the advantage that the operating field 20 is not included in the air flow 19, so that it cannot dry out under the influence of the air flow 19.
  • the clean air generator is set up in the vicinity of the operating table 21, so that the flexible hose 3 can be chosen to be relatively short.
  • the brevity of the flexible hose 3 favors its sterilization, for example in an autoclave, not shown.
  • the flexible hose 3 it must be chosen at least so long that its length is sufficient to be able to connect the fan head 2 to the clean air generator 1 even when the fan head 2 is required at a location on the operating table 21 that is relatively far from the respective location of the clean air generator 1 is.
  • the clean air generator 1 is mounted on wheels 35 with which it is supported on a floor 4. These wheels 35 allow the clean air generator 1 to be moved into a position favorable to the respective operating field 20.
  • the wheels 35 are fastened to a housing 36 in which a conveyor 9 is elastically mounted with its drive 10.
  • a heat exchanger 7 below the conveyor 9, below which an air inlet opening 6 opens into an air distributor 37.
  • This air distributor 37 distributes the air sucked in by the conveyor 9 through the air inlet opening 6 evenly over a heat transfer surface provided by the heat exchanger 7 for cooling the air.
  • the air inlet opening 6 is expediently provided on an upper end 5 of the clean air generator 1 opposite the wheels 35.
  • the conveyor 9 draws a relatively clean air from its surroundings.
  • the air inlet opening 6 can be connected via a connecting hose 38 to a fresh air atmosphere prevailing outside an operating room.
  • the conveyor 9 presses the fresh air drawn in by it and cooled in the heat exchanger 7 in the direction of the flexible hose 3, which can be connected to an air outlet opening 11 of the housing 36 via a coupling 14.
  • This air outlet opening 11 can be provided on an upper end 13 of the housing 36 opposite the wheels 35.
  • a filter 12 is fitted into the housing 36 between the air outlet opening 11 and the conveyor 9. The air conveyed by the conveyor 9 in the direction of the air outlet opening 11 passes the filter 12 on its way to the air outlet opening 11 and is both sterilized and cleaned of other contaminants.
  • a filter 12 other devices for sterilizing the fresh air can also be provided.
  • the flexible hose 3 is connected with its end facing away from the clean air generator 1 to the fan head 2 via a coupling 16. With the aid of this coupling 16, an end 15 of the flexible hose 3 facing away from the clean air generator 1 can be connected to an air inlet 17 which is attached to the fan head 2.
  • This air inlet 17 can, for example, be attached to a rear end face 39 of the fan head 2, which delimits the fan head 2 on a side opposite a front end face 40.
  • the front end face 4o and the rear end face 39 span planes which can run plane-parallel to one another.
  • the air flow 19 flowing tangentially to the operating field 2o emerges from the front end face 4o.
  • the air inlet 17 at another Any place of the fan head 2 is provided, as long as it is suitable for evenly distributing the air flow generated by the clean air generator 1 via an air outlet opening 18 which is arranged in an arc shape in the front end face 4o.
  • the air outlet opening 18 can also be divided into a plurality of small openings 41, which are arranged in the front end face 40.
  • Controllable internals 42 can be provided in the air outlet opening 18, with the aid of which the air flow 19 can be controlled with regard to its direction and strength.
  • These controllable installations 42 can be steering flaps, blinds and other installations which are suitable for directing or preventing the air flow 19.
  • the arcuate design of the air outlet opening corresponds to the shape of the fan head 2, which can be designed in the form of a horseshoe.
  • This horseshoe projects with its two legs 43, 44 in the direction of the operating table 21.
  • the two legs 43, 44 are connected to one another by a yoke 45.
  • the length of this yoke 45 is such that a passage 46 is spanned by it and the two legs 43, 44, which passage is wide enough to span the body of a patient 22 lying on the operating table 21.
  • the front end face 4o of the fan head 2 expediently consists of a sintered metal which has very good aseptic properties.
  • a cover 47 can protrude over the front end face 4o and projects over the front end face 4o in the form of a canopy.
  • This diaphragm 47 extends on an operating table 21 opposite upper end of the yoke 45 and extends with its opposite ends 48, 49 into an upper region of the legs 43, 44 which merges into the yoke 45.
  • An air guiding opening 5o is arranged between the diaphragm 47 and the front end face 4o, which is delimited on the one hand by the front end face 4o and on the other hand by a steering plate 51 which extends essentially plane-parallel to the front end face 4o at a distance from the cross section of the air guiding opening 5o. It is also conceivable to pivotally fix the steering plate 51 to the diaphragm 47, so that a secondary air flow 52 emerging from the air guide opening 50 can either be directed perpendicularly onto the operating table 21 or obliquely onto its surface.
  • Additional air guiding openings 53 can be provided along the operating table 21. Secondary air flows 54 flow out of them and serve to deflect the air flow 19 at a location suitable for the respective operating field 20.
  • the air flow 19 is thermally stabilized.
  • This thermal stabilization is carried out in such a way that the air flow 19 is either cooled or heated in relation to its ambient air.
  • the air flow 19 generated by the conveyor 9 is heated in the heat exchanger 7 or cooled.
  • the heat exchanger 7 can be coupled to a cooling unit 8, so that a refrigerant biased in the cooling unit 8 expands in the heat exchanger 7. The cold released thereby extracts the heat from the air flow 19 passing through the heat exchanger 7.
  • cooling by a few centigrade from the ambient air is sufficient.
  • the cooling unit 8 and the heat exchanger 7 in a unit 55 separate from the housing 36.
  • This is connected via a flexible hose 56 to the housing 36 of the clean air generator 1, in which the conveyor 9 and the filter 12 are arranged.
  • the flexible hose 56 is connected via couplings 23 to the housing 36 on the one hand and the structural unit 55 on the other hand.
  • the conveyor 9 sucks the air flow 19 through an air inlet opening 6 provided on the unit 55, through the heat provided in the unit 55 Transmitter 7 and presses the air flow 19 through the flexible hose 3 into the fan head 2.
  • the air flow 19 leaves this in the direction of the operating field 2 0 .
  • the direction of the air flow 19 can be influenced by the secondary air flow 54.
  • This secondary air flow 54 is taken off in the area of the upper end 13 via a secondary air hose 57 and directed in the direction of the operating table 21.
  • a further secondary air outlet 58 is provided in the region of the upper end 13 and is connected to the operating table 21 via the secondary air hose 57.
  • Secondary air guides 59 which are provided with controllable air guiding openings 53, run on the operating table 21. Depending on the opening of these air guiding openings 53, the secondary air flow 54 is directed in a direction toward the air flow 19 at a location suitable for the position of the respective operating field 20.
  • the secondary air flow 54 is also possible to generate the secondary air flow 54 with the aid of a secondary air generator 6o.
  • This in turn contains a conveyor 61 and is connected to the air guiding openings 53 via a hose 62.
  • a secondary air generator 6o contains a conveyor 61 and is connected to the air guiding openings 53 via a hose 62.
  • the secondary air flow 54 can be cooled or heated in a heat exchanger 63 with respect to the air flow 19.
  • the secondary air flow 54 also serves to bundle the air flow 19.
  • the secondary air flow 54 can also be passed through a filter. It thus amplifies the air flow 19 forming the clean room in the area of its outer boundary and thus contributes to the further Shielding the operating field 2o.
  • a heat transfer surface 64 is provided in the fan head 2, which can consist, for example, of a copper tube.
  • This copper tube can be connected to a water source 65, the water of which flows around the heat transfer surface 64 on one side and flows off via a drain 66.
  • the heat absorbed by the water can be obtained in a corresponding system.
  • the heat transfer surface 64 in the form of a spiral tube in the air flow 19.
  • connection between the clean air generator 1, the cooling unit 8 and the fan head 2 are each provided with couplings 23, which can be designed as double lock couplings. These double lock couplings are used to keep the inside of both the tubes 3, 57 and the clean air generator 1 free of germs when the couplings 14, 16, 23 are released.
  • These couplings 14, 16, 23 can be designed as a bayonet coupling. This can, for example, be attached to the ends of the hose 3 in a sealing manner Have extension 27 which can be sealingly engaged at its end facing away from the hose 3 with a fitting 28.
  • This adapter 28 is attached to the clean air generator 1, the cooling unit 8 or the fan head 2.
  • the extension 27 may have near the end facing the adapter 28 a radially surrounding the extension 27, which carries a driver 30.
  • the driver 3o can be sealingly guided into the interior 31 of the extension 27 facing the air flow and protrudes beyond the end of the extension 27 facing the adapter 28.
  • the locking plate 32 of the fitting piece 28 has a pin 34 which is acted upon by the driver 3o when the coupling is closed when it is moved in the direction of the pin 34 by the turntable 29.
  • the closing plate 32 of the fitting piece 28 is moved into an open position and thereby takes the closing plate 32 of the fitting piece 28 which is mounted adjacent to it.
  • the two closing plates 32 are preferably arranged closely adjacent to one another and provided with a seal, so that possible contamination of the closing plate 32 cannot get into the air flow 19 before the couplings 13, 15, 23 are attached.
  • the filter 12 can be arranged upstream of the conveyor 9 or upstream of the heat exchanger 7.
  • the conveyor 9 can also be arranged in the flow direction in front of the heat exchanger 7 or behind the filter 12.
  • the clean air generator 1 can also be designed so that it emits air currents of different temperatures.
  • the clean air generator 1 is connected to separate air ducts of the fan head 2 via at least two different flexible hoses 3. These air ducts (not shown) lead air flows of different temperatures to the air outlet openings 18. From these, the air flows 19 emerge as parallel partial air flows of different temperatures and are directed tangentially to the operating field 20. In this way it is possible to keep the hands of the operating personnel at a level which they find pleasant, even if the operation takes a relatively long time.
  • the temperature required for the air flow 19 is first generated in the heat exchanger 7. For this purpose, either a heated or a cooled medium flows through the heat exchanger 7.
  • the air flow 19 is generated, which is cleaned in the filter 12 in such a way that it cannot produce any infections in an operation field 20 that would jeopardize the success of an operation.
  • This both cleaned and thermized air flow 19 is passed through the hose 3 into the fan head 2 and exits from it via the air outlet openings 18 in such a way that it is directed tangentially to the respective operating field 20.
  • the fan head 2 can be brought into a position that is favorable for the respective operating field 20.
  • the thermization of the air flow 19 causes it to surround the operating field 20 as a bundle.
  • the air flow 19 can be directed by the controllable internals 42 in such a way that it has the correct tangential direction and the strength deemed necessary by the operating personnel in the area of the operating field.
  • the secondary air flow 52 can be switched on accordingly. This exits from air guide openings 53 at the respectively desired point at which the air flow 19 is to be directed. It is conceivable to generate the secondary air flow 52, 54 in the secondary air generator 6o and to heat it in relation to the air flow 19 in order to bundle it in relation to the latter.
  • the bundling of the air flow 19 can additionally be improved by moistening it.
  • the moistening has the additional advantage that the surgical wound is prevented from drying out even if part of the surgical wound lies within the air flow 19 due to incorrect alignment of the air outlet openings 18. Drying out of the surgical wound is avoided in this case by the air stream 19 being moistened.
  • This humidification can be carried out with the aid of a steam component present in the air flow 19.
  • the air flow 19 absorbs this steam component when it passes through a steam chamber 67, for example, which can be arranged in the course of the flexible hose 3.
  • This steam chamber 67 is connected to a steam generator 69 via a connecting hose 68.
  • this steam generator 69 there is a liquid to be evaporated 7 0, which is heated by a heat source, for example a gas heater 71st
  • the liquid 7o heated by the gas heater 71 evaporates and passes from the steam generator 69 via the connecting hose 68 into the steam chamber 67; the air flow passing through the steam chamber 67 from the clean air generator 1 in the direction of the fan head 2 is enriched with the steam in the steam chamber 67. This is germ-free, since the liquid 7o is germ-free. In addition, the evaporation of the liquid 7o has a sterilizing effect.
  • the vapor particles are finely distributed in the air flow entering the fan head 2, so that they do not condense even within the fan head 2 and when exiting the air outlet openings 18. Rather, they enter the air stream 19 in the area of the surgical field 2o where they prevent an intake of liquid from the area of the surgical field 2 0th
  • the air flow 19 is brought tangentially to the operating field 20, the dryness of the air flow 19 would act like a sink on the moisture present within the operating field 20. The more humid the air flow 19 is, the less it can absorb moisture from the operating field 20. This prevents it from drying out. Particularly in the case of wounds from burn patients, great importance must be attached to ensuring that the Do not over-dry treating wounds in the area of the operating field 2o.
  • the dilution effect occurring in the area of the operating field 20 due to the air flow 19 can contribute significantly to the air flow 19 also carrying away germs originally present in the area of the surgical wound. For this reason, the air flow 19 is aligned so that it can remove the germs located in the area of the operating field 20.
  • the humidification of the air flow 19 can also be brought about by passing it over a water bath. Finally, it is also conceivable to pass the air stream 19 through a water bath. It is conceivable to adjust the temperature of the water bath so that the air flow 19 reaches the temperature necessary for its thermization either above or below the ambient air.
  • the steam chamber 67 or the water bath necessary for humidifying the air flow 19 can be provided at any location of air ducts through which the air flow 19 is directed, depending on the structural conditions of the system. For example, it is conceivable to provide the humidifier between the fan head 2 and the clean air generator 1. However, it is also possible to arrange a steam chamber 67 designed as a humidifier or a corresponding water bath between the conveyor 9 and the air outlet opening 11. Finally, it is conceivable to provide the humidifier in the fan head 2. It can also be arranged directly in front of the fan head 2.
  • the humidifier can be designed as a solvent bath. In particular, it can be considered to use the solvent bath to generate a disinfectant atmosphere within the air flow 19.
  • An aerosol atmosphere is particularly suitable for this.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Ventilation (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP85110123A 1984-08-16 1985-08-13 Procédé pour obtenir un courant d'air stérile et appareil producteur d'atmosphère stérile Expired - Lifetime EP0186730B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85110123T ATE53290T1 (de) 1984-08-16 1985-08-13 Verfahren zum ausrichten eines reinraumstromes und reinraumerzeuger.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3430089A DE3430089C2 (de) 1984-08-16 1984-08-16 Verfahren zur Abgrenzung eines keimfrei zu haltenden Raumbereiches, insbesondere eines Operationsfeldes und Vorrichtung zur Durchführung des Verfahrens
DE3430089 1984-08-16

Publications (3)

Publication Number Publication Date
EP0186730A2 true EP0186730A2 (fr) 1986-07-09
EP0186730A3 EP0186730A3 (en) 1987-09-30
EP0186730B1 EP0186730B1 (fr) 1990-06-06

Family

ID=6243154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110123A Expired - Lifetime EP0186730B1 (fr) 1984-08-16 1985-08-13 Procédé pour obtenir un courant d'air stérile et appareil producteur d'atmosphère stérile

Country Status (6)

Country Link
US (1) US4742764A (fr)
EP (1) EP0186730B1 (fr)
JP (1) JPS6189433A (fr)
AT (1) ATE53290T1 (fr)
DE (1) DE3430089C2 (fr)
DK (1) DK370885A (fr)

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DE3639707A1 (de) * 1986-11-20 1988-06-01 Metallbau Buedelsdorf Vorrichtung zur temperierung eines reinluftstromes
DE3639708A1 (de) * 1986-11-20 1988-06-01 Metallbau Buedelsdorf Vorrichtung zur erzeugung eines reinraumes im bereich eines reinfeldes
JPS63248449A (ja) * 1987-04-03 1988-10-14 Tadahiro Omi ドラフトチヤンバ
DE3718318A1 (de) * 1987-06-01 1988-12-22 Sueddeutsche Etna Werk Gmbh Verfahren und vorrichtung zum schadstoff- und rueckstandsfreien sichtbarmachen von stroemungen in reinstluft-arbeitsraeumen
JPH02120633U (fr) * 1989-03-10 1990-09-28
US4967320A (en) * 1989-04-24 1990-10-30 Distinctively Different, Inc. Dental protective air barrier light apparatus and method
DE19645096A1 (de) * 1996-11-01 1998-05-07 Clinix Gmbh Luftreinigungsgerät
GB2370758A (en) * 2000-12-05 2002-07-10 Keith Melvyn Pulham Operating table with patient cooling
NL1019072C2 (nl) * 2001-03-20 2002-09-23 Cats Beheer B V Luchtbehandelingsinrichting.
DE20121843U1 (de) 2001-08-10 2003-11-20 Fehniger, Dieter, 70825 Korntal-Münchingen - Klimaecke - dreieckiges Klimagerät
DK1462076T3 (da) * 2003-03-28 2011-10-31 Medical Technology Transfer Holding B V Operationsenhed
DE10320195B4 (de) 2003-05-07 2005-04-28 Draeger Medical Ag Offene Patientenpflegeeinheit
DE102004032102A1 (de) * 2004-04-21 2005-11-10 Heinen und Löwenstein GmbH Inkubator
JP2007252453A (ja) * 2006-03-22 2007-10-04 Koken Ltd 解剖実習室用有害ガス曝露防止装置
US20100234794A1 (en) * 2009-03-12 2010-09-16 Kevin Shaun Weadock System and method for reducing surgical site infection
US8409129B2 (en) * 2009-05-01 2013-04-02 Nimbic Systems, Inc. Apparatus for reducing contamination of surgical site
EP3034151B1 (fr) * 2014-12-19 2020-04-29 Sidel Participations, S.A.S. Unité de filtre à air
EP4694731A1 (fr) * 2023-04-09 2026-02-18 LifeAir Medical Corporation Systèmes et procédés de génération d'un rideau d'air
SE547780C2 (sv) * 2024-02-05 2025-11-25 Qleanair Scandinavia Ab Utdragbart utblåsmunstycke innefattande tilloppskanaler kopplade till åtminstone två utblåsområden

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Also Published As

Publication number Publication date
US4742764A (en) 1988-05-10
DK370885A (da) 1986-02-17
EP0186730A3 (en) 1987-09-30
ATE53290T1 (de) 1990-06-15
DE3430089A1 (de) 1986-02-27
DK370885D0 (da) 1985-08-15
JPS6189433A (ja) 1986-05-07
DE3430089C2 (de) 1997-05-22
EP0186730B1 (fr) 1990-06-06

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