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[Investigations on the concentration of air-borne germs in conventionally air-conditioned operating theaters (author's transl)]. 1980

Z Duvlis, and J Drescher

The factors influencing the concentration of air-borne bacteria during operations have been analysed. It was found that the concentration of air-borne bacteria depended primarily on the number of persons present in the operating theater, the air exchange rate per hour and the room volume. Persons with sterile dress were found to have much less influence than did persons with unsterile dress. A formula describing the relationship between the average concentration of air-borne germs in operating theaters, the number of persons in sterile and unsterile dress, the air exchange rate and the room volume was derived. In a total of 142 operations, the formula has been found to give reliable estimates of the concentration of air-borne germs. This equation can be used for testing whether or not the concentration of air-borne bacteria in an operating theater is within acceptable limits which have been defined.

UI MeSH Term Description Entries
D008962 Models, Theoretical Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment. Experimental Model,Experimental Models,Mathematical Model,Model, Experimental,Models (Theoretical),Models, Experimental,Models, Theoretic,Theoretical Study,Mathematical Models,Model (Theoretical),Model, Mathematical,Model, Theoretical,Models, Mathematical,Studies, Theoretical,Study, Theoretical,Theoretical Model,Theoretical Models,Theoretical Studies
D009873 Operating Rooms Facilities equipped for performing surgery. Operating Room,Room, Operating,Rooms, Operating
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000389 Air Conditioning The maintenance of certain aspects of the environment within a defined space to facilitate the function of that space; aspects controlled include air temperature and motion, radiant heat level, moisture, and concentration of pollutants such as dust, microorganisms, and gases. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Air Revitalization,Climate Control,Air Conditionings,Air Revitalizations,Climate Controls,Conditioning, Air,Conditionings, Air,Control, Climate,Controls, Climate,Revitalization, Air,Revitalizations, Air
D000391 Air Microbiology The presence of bacteria, viruses, and fungi in the air. This term is not restricted to pathogenic organisms. Microbiology, Air
D000392 Air Movements The motion of air currents. Air Movement,Movement, Air,Movements, Air
D001419 Bacteria One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive. Eubacteria

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