Certified Surgical Technologist (CST) Practice Exam

What is the minimum Fahrenheit temperature required for sterilization in a prevacuum steam sterilizer?

1. 249-255

2. 263-269

3. 270-276

4. 256-262

The correct answer is: 270-276

The correct answer indicates that the minimum Fahrenheit temperature required for sterilization in a prevacuum steam sterilizer is between 270-276 degrees. This temperature range is critical because it ensures that all microorganisms, including bacterial spores, are effectively killed during the sterilization process. Prevacuum steam sterilizers operate by removing air from the chamber before introducing steam. This action enhances the penetration of steam and decreases the time required for sterilization. At temperatures of 270 degrees Fahrenheit and above, the steam's energy is sufficient to achieve the necessary lethality to ensure that all standard forms of microbial life are eradicated, which is crucial for maintaining the sterility of surgical instruments and other medical equipment. Other temperature ranges, while still relevant to sterilization processes, do not guarantee the same level of efficacy. Therefore, understanding the minimum heat threshold is essential for ensuring that sterilization protocols meet safety and effectiveness standards in surgical and medical settings.