OSMT (Ontario Society of Medical Technologists) Practice Exam

What effect does superheating steam have on an autoclave's sterilizing capacity?

1. Doubles its sterilizing power

2. Diminishes its sterilizing capacity

3. Helps to dry out the equipment

4. Reduces the time needed for complete sterilization

The correct answer is: Diminishes its sterilizing capacity

Superheating steam in an autoclave can diminish its sterilizing capacity primarily because effective sterilization relies on the ability of the steam to condense on surfaces. When steam is superheated, it does not condense effectively, which means that it may not contact the surfaces of the items being sterilized as needed for thorough sterilization. Proper sterilization requires a combination of heat, moisture, and time, and superheated steam lacks the moisture content necessary to achieve this. The other options do not align with the primary principles of sterilization in an autoclave. For instance, while drying equipment can be a byproduct of the process, the main goal is not about drying but achieving effective germicidal action. Additionally, superheating does not enhance the power or reduce the time needed for sterilization; instead, it can hinder the efficiency of the sterilization process by preventing proper condensation and heat transfer.