Medical Device Reprocessing Association of Ontario (MDRAO) Practice Exam

What temperature is required for an extended hot water rinse in a washer disinfector to meet thermal disinfection requirements?

1. 70 C for 1 minute

2. 91 C for 1 minute or 71 C for 30 minutes

3. 100 C for 5 minutes

4. 85 C for 2 minutes

The correct answer is: 91 C for 1 minute or 71 C for 30 minutes

The requirement for an extended hot water rinse in a washer disinfector to achieve thermal disinfection is pivotal in ensuring that medical devices are effectively sanitized. The proper temperatures and times for thermal disinfection are defined based on their ability to destroy pathogens. In the context of medical device reprocessing, maintaining a specific temperature for a certain duration is critical for ensuring that microorganisms are effectively inactivated. The combination of 91°C for 1 minute or 71°C for 30 minutes provides a solid approach to achieving sufficient thermal disinfection. This flexibility allows the process to adapt depending on the materials being processed and the specific manufacturer's guidelines for thermal disinfection. Utilizing 91°C for 1 minute ensures that high-temperature exposure rapidly increases the likelihood of eliminating various pathogens. Conversely, if a lower temperature is utilized, the extended exposure time of 30 minutes enhances the effectiveness of the disinfection process, allowing for a thorough thermal treatment throughout the medical devices. This option stands out as it aligns with established protocols and guidelines for thermal disinfection in the healthcare setting, ensuring that all applicable safety and efficacy standards are met to protect patient health.