. The Canadian nurse. Fig. 3. Tcm[<craturc rise itt anethylene oxide steriliser Probably the most critical part ofthe ethylene oxide cycle is the eijuili-bration of the materials with humidification of the materialsis essential to sterilization. For thisreason the steam is added whiii- thesvstem is under vacuum to allow ttic JULY. 1962 • VOL. 58. No. 7 ODS. Fig. 4. Moisture penetrationcharacteristics Tvith prehumidification moisture to penetrate without the in-terference of air. In most cases mate-rials will be thoroughly humidifiedafter holding the vacuum for 15-30minutes.
. The Canadian nurse. Fig. 3. Tcm[<craturc rise itt anethylene oxide steriliser Probably the most critical part ofthe ethylene oxide cycle is the eijuili-bration of the materials with humidification of the materialsis essential to sterilization. For thisreason the steam is added whiii- thesvstem is under vacuum to allow ttic JULY. 1962 • VOL. 58. No. 7 ODS. Fig. 4. Moisture penetrationcharacteristics Tvith prehumidification moisture to penetrate without the in-terference of air. In most cases mate-rials will be thoroughly humidifiedafter holding the vacuum for 15-30minutes. In extreme cases, where parti-cularly dry materials are present, eventhis application may not provide com-plete penetration by the water such circumstances the incom-ing gas tends to drive the water vaporahead of it into the central portionsof the packages thereby completing thehumidification process. Figure 4 showsthe response of a humidity sensingelement placed in the central portionsof a very dry package. It will be notedthat relative humidity rises slowly un-til the admission of gas into the cham-ber, at which time there is an abruptrise in relative humidity in the centreof the package followed by a gradualdrop toward the pre-set humidity level. Limitations There are limitations within thesystem. It must be remembered thatethylene oxide is a chemical.
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Keywords: ., bookauthorcanadiannursesassocia, bookcentury1900, bookdecade1900
