AST Surgical Technologist Practice Exam

What is the minimum sterilization temperature in Fahrenheit when using the warm cycle of the EtO sterilizer?

1. 75

2. 85

3. 95

4. 105

The correct answer is: 85

When using the warm cycle of an ethylene oxide (EtO) sterilizer, the minimum sterilization temperature is crucial for ensuring the efficacy of the sterilization process. The warm cycle typically operates at a temperature range that is designed to effectively allow the ethylene oxide gas to penetrate the materials and achieve adequate sterilization. The minimum sterilization temperature of 85 degrees Fahrenheit is aligned with the necessary conditions for effective sterilization using EtO. At this temperature, the chemical reactions that lead to the denaturation of microbial cell components can occur efficiently, ensuring that the items being sterilized are properly disinfected without compromising their integrity. It's also important to consider that temperatures below this threshold may not provide sufficient energy for the gas to react effectively, potentially leading to incomplete sterilization. This is particularly relevant for heat-sensitive materials that cannot withstand higher temperatures, making the lower threshold critical in maintaining a balance between effective sterilization while preventing damage. Therefore, 85 degrees Fahrenheit is the recognized minimum temperature necessary for the warm cycle of an EtO sterilizer to function properly and achieve the desired sterilization results.