DK155809B - PROCEDURE AND APPARATUS FOR PROVIDING A CLEAN, NON-FREE SPACE OVER AN OPERATING FIELD - Google Patents
PROCEDURE AND APPARATUS FOR PROVIDING A CLEAN, NON-FREE SPACE OVER AN OPERATING FIELD Download PDFInfo
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- DK155809B DK155809B DK315475A DK315475A DK155809B DK 155809 B DK155809 B DK 155809B DK 315475 A DK315475 A DK 315475A DK 315475 A DK315475 A DK 315475A DK 155809 B DK155809 B DK 155809B
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- 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
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Description
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Opfindelsen angår en fremgangsmåde af den i krav l's indledning angivne art. En sådan fremgangsmåde og et til dens udøvelse indrettet apparatur er beskrevet i dansk patent nr......(ans. nr. 6267/74). Fra DE-offent- liggørelsesskrift 2 228419 kendes endvidere et apparatur til at lede en kimfri luftstrøm mod et operationsfelt.The invention relates to a method of the kind set out in the preamble of claim 1. Such a method and apparatus adapted for its practice are described in Danish Patent No. ..... (Patent No. 6267/74). Furthermore, from DE Publication 2 228419 an apparatus for directing a germ-free air flow towards an operating field is known.
Den hen over operationsfeltet strømmende kimfri lufts aseptiske virkning medfører en vidtgående afskærmning af operationsfeltet mod udefra indtrængende kim. Kun på de steder, hvor luftstrømningen forstyrres, er der fare for, at enkelte kim gennem luftlaget kan nå frem til operationsfeltet. Især i selve operationszonen afbrydes og forstyrres den laminære luftstrømning ved, at denne rammer operatørens hænder og arme eller instrumenter, hvorved der fremkommer turbulens, som kan bevirke, at kim udefra er i stand til at passere gennem luftstrømmen til operationsfeltet.The aseptic effect of the germ-free air flowing across the field of operation results in a far-reaching shielding of the field of operation against external germs. Only in the places where the air flow is disturbed is there a danger that individual germs through the air layer can reach the surgical field. Especially in the operating zone itself, the laminar air flow is interrupted and interfered with by affecting the operator's hands and arms or instruments, resulting in turbulence which may cause the germs from the outside to pass through the airflow to the operating field.
Det er opfindelsens formål at forbedre den i patentskrift nr.....(ans. nr. 6267/74) beskrevne fremgangs måde således, at kim end ikke kan trænge ind i operationsfeltet på de steder, hvor luftstrømmen forstyrres eller afbrydes. Dette opnås ved den i krav l's kendetegnende del angivne foranstaltning. Herved opnås nemlig, at de enkelte luftstrømningslag danner en labyrintbarriere omkring det legeme, ved hvilket luftstrømmen forstyrres. For så vidt som de øverste lag i luftstrømmen på forstyrrelsesstedet endnu gennemtrænges af kim, føres disse bort af.de nederste luftlag i luftstrømmen. Kimenes inddragelse i de af genstanden, f.eks. en operatørs hånd eller et instrument, i luftstrømmen tilvejebragte hvirvler i de øverste luftlag, er ikke til hinder for operationsfeltets renholdelse, idet de omkringhvirvlende kim optages af de nederste luftlag 2It is an object of the invention to improve the process described in patent no. ..... (no. 6267/74) so that germs cannot even enter the field of operation in the places where the air flow is disturbed or interrupted. This is achieved by the measure specified in claim 1. In this way, it is achieved that the individual air flow layers form a maze barrier around the body at which the air flow is disturbed. Insofar as the upper layers of the airflow at the point of disturbance are still penetrated by germs, these are carried away by the lower layer of air in the airflow. The involvement of the germs in those of the object, e.g. an operator's hand or an instrument, provided in the airflow swirls in the upper air layers, does not prevent the operation of the field of operation, since the swirling germs are taken up by the lower air layers 2
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og føres bort af disse.and carried away by these.
Opfindelsen angår tillige et apparatur af den i krav 4's indledning angivne art til udøvelse af fremgangsmåden . Apparaturet er ejendommeligt ved det i krav 4's kendetegnende del angivne.The invention also relates to an apparatus of the kind specified in the preamble of claim 4 for carrying out the method. The apparatus is peculiar to the characterizing part of claim 4.
Ved den i krav 5 kendetegnede udførelsesform for apparaturet opnås en meget exakt styring af luftstrømningslagene ved samvirket mellem blæseren og tilsugningsorganet .In the embodiment of the apparatus according to claim 5, a very precise control of the air flow layers is achieved by the interaction between the fan and the suction means.
Ved den i krav 6 kendetegnede udførelsesform for apparaturet opnås, at indbygningsdelene efter behov kan indstilles svarende til et større eller mindre, effektivt åbningsareal, hvorved der kan tilvejebringes luftlag af forskellig tykkelse og med uens strømningshastighed.In the embodiment of the apparatus according to claim 6, it is achieved that the integral parts can be adjusted as required to a larger or smaller, effective opening area, whereby air layers of different thickness and at different flow rates can be provided.
Ί det følgende forklares opfindelsen nærmere ved hjælp af tegningen, hvor fig. 1 set fra siden viser et operationsbord .med en ud— førelsesform for apparaturet ifølge opfindelsen, fig. 2 set forfra en udførelsesform for en til apparaturet hørende blæser, fig. 3 et længdesnit gennem en blæser og gennem et med denne samvirkende organ til tilsugning og bortledning af ventilationsluft fra blæseren, 1 4 perspektivisk en anden udførelsesform for blæseren med et indbygget jalousi, og fig. 5 set forfra en yderligere udførelsesform for blæseren.In the following, the invention is explained in more detail by means of the drawing, in which fig. Fig. 1 is a side view of an operating table showing an embodiment of the apparatus according to the invention; 2 is a front view of one embodiment of a blower belonging to the apparatus; FIG. Fig. 3 is a longitudinal section through a fan and through a co-operating means for suction and discharge of ventilation air from the fan; 1 is a perspective view of another embodiment of the fan with a built-in jalousie; 5 is a front view of a further embodiment of the fan.
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Apparaturet ifølge opfindelsen består hovedsageligt af en blæser 1 Og af et organ 2 til tilsugningen af en fra blæseren 1 udgående og mod organet 2 rettet luftfetrøm 3 og til bortledning af den af organet 2 tilsugede luft via et'ledningssystem 4. Blæseren 1 og tilsugningsorganet 2 er anbragt oven for en operationsbordplade 5 på et operationsbord 6 således, at luftstrømmen 3 passerer hen over den del af bordpladen 5, på hvilken operationen udføres. Operationsfeltet er i fig. 1 betegnet med 7. Blæseren 1 og organet 2 er monteret via led, ved hjælp af hvilke disse to dele kan rettes således mod hinanden, at luftstrømmen 3 passerer nøjagtigt oven for operationfeltet 7. Da operationsfeltet 7 kan have forskellig form, alt efter hvilken operation der skal gennemføres, er både blæseren 1 og det som tilsugningshoved udformede' organ 2 højdeindstilleligt, monteret på hver sin opstander, af hvilke blæseopstanderen er betegnet med 8. Blæseren 1 og organet 2 indstilles således, at luftstrømmen 3 i tangential retning passerer hen over operationsfeltet 7. Til tilvejebringelse af en så effektiv spærring som muligt mod indtrængning af kim i operationsfeltet er luftstrømmen 3 opdelt i mindst to luftstrømningslag 10, 11, fig. 3, der tilvejebringes ved hjælp af i blæseren 1 monterede indbygningsdele 9, som er indrettet til alt efter behov at frigive mere eller mindre store luftudstrømningsåbninger 12, 13 i blæseren 1. Også i organet 2 til bortsugning af blæserluften er anbragt indbygningsdele 14, ved hjælp af hvilke en luftstrømmen 3 optagende indsugningsåbning 15 i organet 2 opdeles i et til antallet af luftsudstrømningsåbninger 12, 13 i blæseren svarende antal særskilte indsugningsåbninger. På denne måde opnås, at der opretholdes stærkt bundtede luftstrømningslag fra hver sin luftudstrømningsåbning 12, 13, indtil blæser luf ten når frem til organet 2'.s indsugningsåbning 15. Disse kohærente luftlag bidrager til en intensiv hvirveldannelse i luftstrømmen 3> så at enkelte kim, der måtte være trængt gennem det øverste luftlag 10, bibringes en kraftigThe apparatus according to the invention consists mainly of a blower 1 and of a means 2 for suction of air flow 3 directed from the blower 1 and directed towards the means 2 and for the discharge of air sucked by the means 2 via a conduit system 4. The blower 1 and the suction means 2 is positioned above an operating table top 5 on an operating table 6 such that the airflow 3 passes over the portion of the table top 5 on which the operation is performed. The operation field is shown in FIG. 1 denoted by 7. The fan 1 and the member 2 are mounted via joints, by means of which these two parts can be directed so that the air flow 3 passes exactly above the operating field 7. Since the operating field 7 can have different shapes according to the operation. to be carried out, both the fan 1 and the suction head member 2 are height adjustable, mounted on each upright, of which the fan upright is designated 8. The fan 1 and the member 2 are adjusted so that the air flow 3 passes tangentially across the operating field. 7. In order to provide as effective a barrier as possible against the penetration of germs in the field of operation, the air flow 3 is divided into at least two air flow layers 10, 11, fig. 3, which is provided by means of built-in parts 9 mounted in the fan 1, which are arranged to release, as needed, more or less large air outflow openings 12, 13 in the fan 1. Also, in the means 2 for suction of the blower air, housing parts 14 are arranged, by means of of which an inlet opening 15 receiving airflow 3 in the member 2 is divided into a number of separate intake openings corresponding to the number of air outlet openings 12, 13 in the fan. In this way, highly bundled air flow layers are obtained from each air outlet opening 12, 13 until the blower air reaches the suction opening of the body 2. These coherent air layers contribute to intensive eddy formation in the air flow 3 so that individual germs , which may have penetrated through the upper air layer 10, is strongly imparted
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cirkulerende bevægelse og af del: nederste lufstrømningslag 11 ledes bort til organet 2.circulating motion and of part: the lower air flow layer 11 is passed to the member 2.
Indbygningsdelene 14 kan være udformet som jalousier, der til åbning af luftudstrømningsåbningerne 12, 13 og af luft· sugningsåbningerne 15 opvikles på ruller, der i fig. 3 er vist for blæserens vedkommende og betegnet med 16, 17, 18 og 19.The integral parts 14 can be formed as shutters which are wound on rollers which in FIG. 1 are opened to open the air outlet openings 12, 13 and of the air · suction openings 15. 3 is shown for the fan and designated 16, 17, 18 and 19.
Til spærring af åbningerne 12, 13, 15 afvikles jalousierne fra den pågældende rulle 16, 17, 18, 19, hvorved deres kantpartier glider i ikke viste styr og jalousierne skydes hen over den pågældende åbning 12, 13, 15. På denne måde kan åbningernes effektive strømningsareal reguleres svarende til de forskellige behov. Til opnåelse af en så god tilpasning til de varierende forhold og behov som muligt, er jalousierne opdelt i et stort antal afsnit, der kan manøvreres uafhængigt af hinanden, så at man også kan ændre beliggenheden af luftudstrømningsåbningerne 12, 13 i blæseren 1. På denne måde kan f.eks. blæserens øvre luftudstrømningsåbning 13 forskydes meget langt i retning mod blæserens centrum ved vidtgående afvikling af jalousiet fra rullen 19 og ved tilsvarende vidtgående oprulning af jalousiet på rullen 18. Desuden kan man som nævnt ved mere eller mindre vidtgående oprulning af jalousierne på deres ruller mindske eller øge luftudstrømningsåbningerne 12, 13's bredde, d.v.s. deres højde, hvorved luftstrømningslagene 10, 11*s tykkelse kan reguleres efter ønske.For blocking of the openings 12, 13, 15, the shutters are unwound from the respective roll 16, 17, 18, 19, whereby their edge portions slide in the guide not shown and the shutters are slid across the relevant opening 12, 13, 15. In this way, the openings effective flow area is adjusted according to the different needs. In order to achieve the best possible adaptation to the varying conditions and needs, the blinds are divided into a large number of sections which can be operated independently of one another, so that the location of the air outlet openings 12, 13 in the fan can also be changed. way can e.g. the upper air outflow opening 13 of the blower is displaced very far towards the center of the blower by wide unwinding of the roller blind 19 and by correspondingly rolling the roller blind on the roller 18. In addition, as mentioned above, the roller shutters on their rollers can be reduced or increased the width of the air outlet openings 12, 13, ie their height, whereby the thickness of the air flow layers 10, 11 * can be adjusted as desired.
I stedet for jalousier kan anvendes luftspjæld til lukning og åbning af luftudstrømningsåbningerne 12, 13. Sådanne luftklapper kan enten ved forskydning i sideretningen eller ved op- eller iklapning styres således, at luftudstrømningsåbningerne 12, 13 derved åbnes eller lukkes efter behov.Instead of shutters, air dampers can be used to close and open the air outflow openings 12, 13. Such air flaps can be controlled either by lateral displacement or by folding or folding, thereby opening or closing the air outflow openings 12, 13 as needed.
I visse tilfælde kan det være fordelagtigt, at den i flere luftstrømningslag 10, 11 fra blæseren 1 udgående luftstrøm 3 til-suges i sin helhed som sammenhængende strøm af organet 2. I så tilfælde bringes indbygningsdelene 14 i organet 2 i deres helt åbne stilling, så at luftstrømmen 3 i sin samlede bredde kan passere ind gennem indsugningsåbningen 15.In some cases, it may be advantageous for the air flow 3 exiting from the fan 1 in several air flow layers 10, 11 to be drawn in its entirety as a continuous flow of the member 2. In this case, the integral parts 14 of the member 2 are brought into their fully open position. so that the air stream 3 in its overall width can pass through the intake port 15.
Til styring af luftstrømningslagene 10, 11 og af den samlede luft-For controlling the air flow layers 10, 11 and of the total air flow
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strøm 3 er blæseren 1 forsynet med et grundelement 20, fig. 2, med en øvre afgrænsningsvæg 21 og en nedre afgrænsningsvæg 22, jfr. fig. 1 og 2, der er hvælvet fremad i luftens strømningsretning, og i hvilke luftudstrømningsåbningerne 12, 13 er udformet, så at de fra luftudstrømningsåbningerne 12, 13 udgående luftstrømningslag 10, 11 er rettet konvergerende mod organet 2.current 3, the fan 1 is provided with a basic element 20, fig. 2, with an upper boundary wall 21 and a lower boundary wall 22, cf. FIG. 1 and 2, which are curved forwardly in the flow direction of the air and in which the air flow openings 12, 13 are formed so that the air flow layers 10, 11 extending from the air flow openings 12, 13 are converging towards the member 2.
Herved opnås, at luftstrømmen 3 i hele operationsfeltet 7’s område er så kraftigt bundtet, at der sikres en til bortførsel af kim tilstrækkelig kraftig luftstrømning. Luftstrømmen 3 kan ved mere eller mindre kraftig hvælving af grundelementet 20 bundtes mere eller mindre stærkt og derved tilpasses operationsfeltet 7’s form. I dette øjemed er grundelementet 20 fleksibelt, så at dets øvre og nedre afgrænsning henholdsvis 21, 22 efter behov kan hvælves mere eller mindre kraftigt frem.This results in the fact that the air flow 3 throughout the area of the operating field 7 is so strongly bundled that a sufficiently strong air flow is ensured for the removal of germs. The air flow 3 can be bundled more or less strongly by more or less vigorous arching of the base element 20, thereby adapting to the shape of the operating field 7. To this end, the base member 20 is flexible so that its upper and lower boundaries 21, 22 and 23, respectively, can be more or less vaulted forward as needed.
Desuden kan grundelementet også være krummet på tværs af luftstrømmen 3*s retning som vist i fig. 2. En fra et sådant på tværs krummet eller hvælvet grundelement 20 udgående luftstrøm 3 vil tagformet strømme hen over operationsfeltet 7. Såfremt operationsfeltet f.eks. er smalt og højt på grund af en tilsvarende stilling af den legemsdel, på hvilken det operative indgreb skal foretages, trækkes grundelementet 20 langt nedad ved begge sider, så at der fås en smal og meget højt hvælvet luftstrøm 3. Luftudstrømningsåbningerne 12, 13 vil da blive deformeret på tilsvarende vis.In addition, the base member may also be curved transversely to the direction of air flow 3 * as shown in FIG. 2. An air stream 3 exiting from such a transversely curved or vaulted element 20 will roof-shaped flow over the operating field 7. If the operating field e.g. is narrow and high due to a corresponding position of the body part on which the operative intervention is to be made, the base member 20 is pulled far down on both sides so as to obtain a narrow and very high vaulted air flow 3. The air outlet openings 12, 13 will then be deformed in a similar manner.
Til sikring af en tilstrækkelig effektiv og fuldstændig tilsug-ning af den fra en blæser 1 med kraftigt deformeret grundelement udgående luftstrøm 3 ved hjælp af organet 2, kan også sidstnævnte have en fleksibel basisdel 23, fig. 3, der da kan deformeres svarende til blæserens grundelement 20 til tilvejebringelse af en så vidt muligt bundtet tilsugning af luftstrømmen 3. I dette øjemed har også sugeorganets del 23 en fremad hvælvet øvre og nedre ende- og afgrænsningsdel henholdsvis 24 og 25 med hver sin indsugningsåbning 15 for det pågældende luftstrømningslag henholdsvis 10 og 11.In order to ensure a sufficiently efficient and complete suction of the air flow 3 exiting the air from the fan 1 with a strongly deformed basic element 3, the latter may also have a flexible base part 23, fig. 3, which can then be deformed corresponding to the fan element 20 for providing a bundled suction of the air flow as far as possible 3. For this purpose, the suction member part 23 also has a forwardly curved upper and lower end and delimiting portions 24 and 25 respectively with their respective suction apertures. 15 for the air flow layer 10 and 11 respectively.
Til yderligere fremme af fra hinanden adskilte luftstrømningslag 10 og 11 kan luftudstrømningsåbningerne 12 og 13 være udformet som dyser, da disse er særligt velegnet til frembringning afTo further promote separate air flow layers 10 and 11, the air outlet openings 12 and 13 may be formed as nozzles, as these are particularly suitable for producing
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skarpt afgrænsede luftstrømningslag.sharply delimited air flow layers.
Også luftstrømmen 3’s hastighed kan tilpasses varierende forhold. Alt efter operationsfeltet 7’s længde kan man arbejde med en mere eller mindre stor strømningshastighed i luftstrømmen 3·Also, the airflow 3's velocity can be adjusted to varying conditions. Depending on the length of the operating field 7, you can work with a more or less large flow rate in the airflow 3 ·
Desuden kan luften i de enkelte luftstrømningslag 10, 11 strømme med ens eller forskellig hastighed. I mange tilfælde vil det være hensigtsmæssigt, at luften i de to luftstrømningslag 10, 11 strømmer i indbyrdes modsat retning, så at luften i luftstrømningslaget 10 f.eks. passerer i retning fra organet 2 mod blæseren 1, medens luften i det nedre luftstrømningslag 11 passerer i retning fra blæseren 1 mod organet 2.In addition, the air in the individual air flow layers 10, 11 can flow at the same or different speed. In many cases, it will be convenient that the air in the two air flow layers 10, 11 flow in opposite directions, so that the air in the air flow layer 10 e.g. passing in the direction of the means 2 towards the fan 1, while the air in the lower air flow layer 11 passes in the direction of the fan 1 towards the means 2.
Luftstyringen i grundelementet 20 kan også tilvejebringes ved hjælp af stege 30, der er formet som grundelementet 20 og er fordelagtige derved, at de meget nemt kan holdes kimfri. De enkelte stege 30, der danner grundelementet, kan i steriliseringsøjemed afmonteres særskilt og enkeltvis steriliseres i en autoklav. Ved stegenes genmontering manipuleres disse ved hjælp af sterile tekstilstykker. Luftudstrømningsåbningerne i stegene 30 kan være udformet som dyser, så at luftstrømmen kan ledes i en bestemt retning. Til yderligere formindskelse af luftvoluminet inden for grundelementet kan der gennem stegene 30 passere rør 31» som er beliggende i en så lille indbyrdes afstand, at den fra rørene 31's luftudstrømningsåbninger udstrømmende luft umiddelbart efter disse åbninger danner et sammenhængende luftslør. Også rørene 31's luftudstrømningsåbninger kan være udformet som dyser. De enkelte rør 31 kan være fremstillet af et fleksibelt materiale, så at rørene ikke hindrer grundelementets deformering. Til opnåelse af en optimal tilpasselighed af grundelementet til operationsfeltets form er de enkelte stege indbyrdes udskiftelige. På denne måde fås ved forskellig sammenføjning af forskellige enkeltstege 30 et stort antal variationsmuligheder med henblik på grundelementet 20’s udformning.The air control in the base member 20 can also be provided by frying 30, which is shaped like the base member 20 and is advantageous in that they can be easily kept germ-free. The individual fryers 30 which form the basic element can be removed separately for sterilization purposes and individually sterilized in an autoclave. During the reassembly of the ladders, these are manipulated using sterile textile pieces. The air flow openings in the rungs 30 may be formed as nozzles so that the air flow can be directed in a particular direction. To further reduce the volume of air within the basic element, pipes 31 may pass through the pipes 30 which are so spaced apart that the air flowing from the pipes 31's air outflow openings immediately after these openings forms a continuous air vapor. Also, the air outlet openings of the pipes 31 may be formed as nozzles. The individual tubes 31 may be made of a flexible material so that the tubes do not impede the deformation of the base member. In order to achieve an optimal adaptability of the basic element to the shape of the field of operation, the individual ladders are interchangeable. In this way, by various joining of different single stages 30, a large number of possibilities of variation are obtained for the design of the element 20.
Blæseren 1 og ‘tilsugningsorganet 2 kan endvidere være drejeligt monteret på hver sin opstander 8, men kan også være monteret på hvert sit af operationsbordet 6 uafhængige stativ. Under alle omstændigheder er det vigtigt at skille rummet mellem operationsbordpladen 5 og blæseren l's nedre afgrænsning 22 fra det omgi-The fan 1 and the suction means 2 may furthermore be pivotally mounted on each upright 8, but may also be mounted on each stand independent of the operating table 6. In any case, it is important to separate the space between the operating table top 5 and the lower boundary 22 of the fan 1 from the surrounding area.
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< .<.
vende luftvolumen ved hjælp af et skærmorgan 26, fig. 1, da der ellers vil være risiko for, at luftstrømmen 3 river foru-iériet lilft fra den Omgivende atmosfære med ind i operationsfeltet 7. Afskærmingsorganet 26 skal så vidt muligt bestå af et bøjeligt materiale, så at det kan tilpasse sig en hvilken som helst indstilling af blæseren 1.reversing the air volume by means of a screen means 26, fig. 1, since otherwise there will be a risk that the airflow 3 tears the air from the ambient atmosphere into the field of operation 7. The shielding means 26 shall as far as possible consist of a flexible material so that it can adapt to any setting the fan 1.
Claims (11)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2433768 | 1974-07-13 | ||
| DE19742433768 DE2433768C2 (en) | 1974-07-13 | 1974-07-13 | Operating field clean room generator |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK315475A DK315475A (en) | 1976-01-14 |
| DK155809B true DK155809B (en) | 1989-05-16 |
| DK155809C DK155809C (en) | 1989-10-23 |
Family
ID=5920500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK315475A DK155809C (en) | 1974-07-13 | 1975-07-11 | PROCEDURE AND APPARATUS FOR PROVIDING A CLEAN, NON-FREE SPACE OVER AN OPERATING FIELD |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5132091A (en) |
| BE (1) | BE831356R (en) |
| CH (1) | CH610762A5 (en) |
| DE (1) | DE2433768C2 (en) |
| DK (1) | DK155809C (en) |
| FR (1) | FR2277596A2 (en) |
| GB (1) | GB1514759A (en) |
| IT (1) | IT1049557B (en) |
| NL (1) | NL7508309A (en) |
| SE (1) | SE405206B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8324744D0 (en) * | 1983-09-15 | 1983-10-19 | Collins G J | Drier unit |
| DE3430089C2 (en) * | 1984-08-16 | 1997-05-22 | Zinon Dr Med Douvlis | Process for delimiting a sterile area to be kept, in particular an operating field and device for carrying out the process |
| JPH033307Y2 (en) * | 1987-06-30 | 1991-01-29 | ||
| JP2007252453A (en) * | 2006-03-22 | 2007-10-04 | Koken Ltd | Harmful gas exposure preventing device for dissection practice room |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US983877A (en) * | 1910-02-02 | 1911-02-14 | Henry H Cummings | Air-screen. |
| DE2228419A1 (en) * | 1971-06-17 | 1972-12-21 | Pielkenrood-Vinitex N.V., Assendelft (Niederlande) | Device for the supply of a sterile air stream over an operating table |
-
1974
- 1974-07-13 DE DE19742433768 patent/DE2433768C2/en not_active Expired
-
1975
- 1975-07-03 CH CH869175A patent/CH610762A5/en not_active IP Right Cessation
- 1975-07-09 GB GB2893275A patent/GB1514759A/en not_active Expired
- 1975-07-11 DK DK315475A patent/DK155809C/en not_active IP Right Cessation
- 1975-07-11 FR FR7521836A patent/FR2277596A2/en active Granted
- 1975-07-11 NL NL7508309A patent/NL7508309A/en not_active Application Discontinuation
- 1975-07-11 IT IT2534075A patent/IT1049557B/en active
- 1975-07-11 SE SE7507987A patent/SE405206B/en not_active IP Right Cessation
- 1975-07-12 JP JP8493775A patent/JPS5132091A/en active Granted
- 1975-07-14 BE BE7000682A patent/BE831356R/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US983877A (en) * | 1910-02-02 | 1911-02-14 | Henry H Cummings | Air-screen. |
| DE2228419A1 (en) * | 1971-06-17 | 1972-12-21 | Pielkenrood-Vinitex N.V., Assendelft (Niederlande) | Device for the supply of a sterile air stream over an operating table |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7508309A (en) | 1976-01-15 |
| CH610762A5 (en) | 1979-05-15 |
| FR2277596B2 (en) | 1980-02-22 |
| FR2277596A2 (en) | 1976-02-06 |
| IT1049557B (en) | 1981-02-10 |
| BE831356R (en) | 1975-11-03 |
| DK315475A (en) | 1976-01-14 |
| GB1514759A (en) | 1978-06-21 |
| DE2433768C2 (en) | 1987-05-07 |
| JPS5132091A (en) | 1976-03-18 |
| JPS6242624B2 (en) | 1987-09-09 |
| DE2433768A1 (en) | 1976-01-29 |
| DK155809C (en) | 1989-10-23 |
| SE405206B (en) | 1978-11-27 |
| SE7507987L (en) | 1976-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |