Local exhaust and cycle purges reduce ETO release

Area of Science:

• Environmental Health
• Occupational Safety
• Sterilization Technology

Background:

• Ethylene oxide (ETO) is a widely used sterilant for medical devices.
• Concerns exist regarding operator exposure and environmental release of ETO.
• Existing sterilization methods require optimization for safety.

Purpose of the Study:

• To evaluate the effectiveness of local exhaust and purge cycles in reducing ETO exposure.
• To assess the impact of these modifications on environmental ETO levels.

Main Methods:

• Testing ETO sterilizers equipped with local exhaust ventilation.
• Implementing and testing purge cycles in ETO sterilization processes.
• Measuring operator exposure levels and ambient environmental ETO concentrations.

Main Results:

• Significant reductions in operator exposure to ethylene oxide were observed.
• Substantial decreases in environmental levels of ethylene oxide were recorded.
• The combined system of local exhaust and purge cycles proved highly effective.

Conclusions:

• Local exhaust and purge cycles are effective engineering controls for ETO sterilizers.
• These modifications substantially mitigate risks associated with ethylene oxide use.
• Implementing these features enhances workplace safety and environmental protection.