Aseptic surgical technique, with especial reference to gynæcological operations . Steam-sterilizer (Kny-Scheerer). Another form of steam-sterilizer which has givenvery satisfactory results is represented m F* 3. In 38 ASEPTIC SURGICAL TECHNIQUE. hospitals or other places where large quantities ofclothing and other materials have to be sterilized atone time large steam disinfectors must be set up. Fig. 4. mINc». Steam-sterilizer (in section). For quick and thorough disinfection steam underpressure is employed. (Fig. 4.) One of the most ingenious methods of insuring com-plete disinfection is tha
Aseptic surgical technique, with especial reference to gynæcological operations . Steam-sterilizer (Kny-Scheerer). Another form of steam-sterilizer which has givenvery satisfactory results is represented m F* 3. In 38 ASEPTIC SURGICAL TECHNIQUE. hospitals or other places where large quantities ofclothing and other materials have to be sterilized atone time large steam disinfectors must be set up. Fig. 4. mINc». Steam-sterilizer (in section). For quick and thorough disinfection steam underpressure is employed. (Fig. 4.) One of the most ingenious methods of insuring com-plete disinfection is that known as fractional or discon-tinuous sterilization. If a fluid be kept at a temperatureof 100° C. (212° F.) in a steam-sterilizer for twentyminutes, all vegetative forms of bacteria will be de- FRACTIONAL STERILIZATION. 39 stroyed. If this fluid then be kept for twenty-fourhours at the ordinary room or body temperature, anyspores which have escaped destruction (certain sporesare known to resist a two hours exposure to stream-ing steam) at the first heating will have grown outinto vegetative forms, and can then be killed by asimilar exposure on the second day. If the processbe repeated for a third time, one can be reasonablysure of having secured a completely sterile fluid. Tyn-dall, Pasteur, and others have shown that completesterilization is practicable with the use of much lowertemperatures (60°
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