Where should a PCD (biological indicator) be placed in a low-temperature hydrogen peroxide (LTHP) sterilizer?

The placement of a PCD (Performance Qualification Device), specifically a biological indicator, in a low-temperature hydrogen peroxide (LTHP) sterilizer is crucial for accurately assessing the effectiveness of the sterilization process. The recommended location is the top shelf, center.

This position is chosen because the top shelf is typically where the sterilant concentration is expected to be more uniform and effective, ensuring that the biological indicator is exposed to the full strength of the hydrogen peroxide. Additionally, placing the indicator in the center maximizes exposure and reflects the conditions that items in that area of the sterilizer would experience.

Positioning the PCD at the top center helps to replicate the worst-case scenario for sterilization conditions, providing a strong measure of the sterilization process's efficacy. Therefore, this strategy supports proper verification of the sterilization cycle and ensures that all areas within the sterilizer receive adequate sterilization exposure.