Medical Device Reprocessing Association of Ontario (MDRAO) Practice Exam

What are the three parameters for a gravity steam sterilizer according to CSA Standards?

1. 121 degrees C for 15 min

2. 125 degrees C for 30 min

3. 121 degrees C for 30 min on gravity cycles

4. 130 degrees C for 10 min

The correct answer is: 121 degrees C for 30 min on gravity cycles

The correct choice reflects the established standards for gravity steam sterilization, which are critical in ensuring the effective sterilization of medical devices and materials. According to the Canadian Standards Association (CSA) standards, the parameters for gravity steam sterilizers specifically state a requirement of 121 degrees Celsius maintained for a duration of 30 minutes. This combination of temperature and time is essential for ensuring that steam can penetrate the items being sterilized, allowing for effective bacterial spore kill and overall sterilization. The importance of maintaining these specific conditions is backed by extensive studies on steam sterilization efficacy, which highlight the need for appropriate exposure to both temperature and time to achieve reliable sterilization outcomes. While other parameters listed may appear to offer alternative sterilization options, they do not align with the established CSA guidelines specifically for gravity steam sterilization. Factors such as the temperature being too high or the exposure time too short can lead to ineffective sterilization, which is why adherence to the recognized parameters is crucial for patient safety and infection control in medical settings.