Hi,
This is a common question while reading sterilization processes. Here writing in a very simple understandable logic & concepts for the Topic.
The Bowie-Dick Test is an indicator having the special purpose of evaluating the efficiency of dynamic air removal sterilizer systems.
In this test the indicator is being place with the load for sterilization. It is important to note that the Bowie-Dick Test is not to be considered as a biological performance test. It is intended only to alert the user that the air removal system has deteriorated in performance and should be corrected before sterilization problems occur as indicated by a biological indicator failure.
Interpretations of Bowie-Dick test are based on experience with the individual sterilizer, the Bowie-Dick Test pack itself, and knowledge and background concerning how this test works and the factors influencing a successful outcome.
Few Bowie-Dick Test packs are easier to interpret than other available because the visual assessment of pass/fail criteria is subjective and not quantitative. Different shades of gray (or black) may not be easy to detect. Precise differences in shading and uniformity of the observed results may not be obvious for all.
Refer figure-1 for proper understanding of Bowie
Happy Reading
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