Laser Technician (International Board of Electrologist Certification) IBEC Board Exam

Which of the following is not an approved sterilization method?

1. Dry heat.

2. Disinfectant.

3. Autoclaving.

4. Cold sterilization.

The correct answer is: Disinfectant.

Disinfectants are typically used to reduce the number of pathogens on surfaces or instruments, but they do not guarantee the complete elimination of all microorganisms, particularly spores. Unlike sterilization methods, which achieve a state of sterility where all forms of microbial life, including bacteria, viruses, fungi, and spores, are destroyed, disinfectants only lower the microbial load to a safe level. In contrast, dry heat, autoclaving, and cold sterilization are recognized as effective sterilization methods. Dry heat sterilization uses high temperatures over a specified period to kill microorganisms. Autoclaving employs steam under pressure for sterilization, which is highly effective at achieving sterility. Cold sterilization typically involves using chemical agents, like glutaraldehyde, which can also effectively sterilize instruments when used correctly and for the appropriate duration. Thus, disinfectants do not meet the stringent requirements for sterilization.