Certified Biomedical Equipment Technician (CBET) Practice Exam

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After the first run of a vacuum sterilizer, the Bowie-Dick test was positive, indicating that the chamber

temperature was too low

temperature was too high

was evacuated too much

was not evacuated sufficiently

A positive Bowie-Dick test indicates that the vacuum sterilizer did not achieve the proper degree of vacuum required for effective sterilization. This test is designed to assess the efficiency of air removal and steam penetration in the sterilization chamber. When the test is positive, it suggests that air pockets remain within the load, preventing steam from reaching all surfaces, which is critical for sterilization.

An insufficient evacuation of the chamber means that there may still be residual air when steam is introduced, resulting in incomplete sterilization. The Bowie-Dick test relies on specific indicators that react to steam and air presence; if those conditions are not adequately met, it results in a positive reading. This underscores the importance of ensuring that the sterilization process effectively removes air to allow steam to penetrate fully and achieve the desired sterilization efficacy.

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