OSMT (Ontario Society of Medical Technologists) Practice Exam

Common errors that can reduce the effectiveness of disinfectants and sterilizers include all of the following except:

1. a. changing solutions after the recommended period of use has elapsed

2. b. adding of wet sanitized items to a solution

3. c. the thorough rinsing of all instruments and glassware prior to the sterilization process

4. d. sterilizing solutions left in open containers

The correct answer is: c. the thorough rinsing of all instruments and glassware prior to the sterilization process

The effectiveness of disinfectants and sterilizers can be compromised by various common errors, but thorough rinsing of instruments and glassware prior to sterilization is not one of them. In fact, rinsing is a critical step in the cleaning process before sterilization or disinfection. It helps to remove residual contaminants, organic material, and any detergent that might interfere with the efficacy of the sterilization or disinfection process. By thoroughly rinsing, the surfaces of instruments and glassware are better prepared to interact efficiently with the sterilizing agent. The other options represent actions that would negatively impact the effectiveness of disinfectants and sterilizers. Changing solutions after their recommended period of use can lead to diminished antimicrobial efficacy, while adding wet sanitized items to a solution may introduce contaminants or dilute the solution's concentration. Similarly, leaving sterilizing solutions in open containers can lead to evaporation or contamination, both of which hinder their effectiveness.