Related Experiment Videos
Ethylene oxide dispersion from gas sterilizers.
American Industrial Hygiene Association Journal
|August 1, 1983
Summary
Ethylene oxide (EtO) gas, used for sterilizing medical devices, tends to rise when sterilizer doors open. Local exhaust ventilation effectively reduces EtO exposure levels and duration, crucial for worker safety.
Area of Science:
- Occupational Health and Safety
- Environmental Science
- Industrial Hygiene
Background:
- Ethylene oxide (EtO) is a vital sterilant for heat-sensitive medical equipment.
- Worker exposure to EtO is a significant concern due to its potential carcinogenicity.
- Regulatory bodies are re-evaluating exposure limits for EtO.
Purpose of the Study:
- To assess the influence of ventilation, temperature, and humidity on EtO plume dynamics.
- To quantify EtO concentrations and duration during sterilization cycles.
- To evaluate the effectiveness of local exhaust ventilation in mitigating EtO exposure.
Main Methods:
- Simultaneous monitoring of EtO concentrations using gas analyzers above and below sterilizer doors.
- Testing conducted on three different sterilizer types under typical operating conditions.
- Varied local exhaust ventilation parameters while controlling temperature and humidity.
Main Results:
- EtO gas plume demonstrated an upward flow pattern upon sterilizer door opening.
- Highest EtO concentrations were consistently measured at the upper monitoring location.
- Local exhaust ventilation significantly decreased EtO concentrations and exposure duration.
Conclusions:
- EtO release patterns are influenced by upward plume directionality.
- Local exhaust ventilation is a critical control measure for reducing occupational EtO exposure.
- Sterilizer temperature and humidity within tested ranges did not significantly alter EtO release characteristics.