Case Study: Enhancing Sterile Processing Safety with Continuous Hydrogen Peroxide Monitoring
Background
Hospitals are responsible for maintaining safe environments for patients, staff, and visitors. In sterile processing departments (SPD), sterilization technologies play a critical role in ensuring medical instruments are properly decontaminated and safe for reuse. However, many sterilization processes involve chemicals, such as hydrogen peroxide vapor, that can pose worker exposure risks if not properly monitored.
A hospital in South Carolina recognized the importance of implementing reliable safety measures to protect their sterile processing team while maintaining efficient sterilization workflows.
The Challenge
Even when sterilizers operate correctly, several operational and mechanical factors can affect the amount of hydrogen peroxide vapor that may escape into the sterile processing environment.
Common situations that can increase potential exposure include:
- Door seal or door gasket leaks caused by wear or improper sealing
- Cassette or load removal issues, such as loads becoming stuck during unloading
- Incomplete aeration or ventilation, leaving residual vapor in the chamber or on instruments
- Improper loading of the sterilizer can interfere with vapor circulation and removal
- Sterilizer exhaust system issues, preventing vapor from being properly vented
- Staff standing in high-risk zones, such as directly in front of the sterilizer door or above the unit
- Sterilant cartridge or cassette handling, which can release small amounts of vapor during installation or disposal
Any of these situations can affect how much hydrogen peroxide vapor a sterilizer releases and potentially expose workers during routine operations.
Industry guidance highlights the importance of maintaining safe exposure levels. The AAMI ST58 standard recommends maintaining hydrogen peroxide exposure below 1 ppm as an 8-hour time-weighted average (TWA) in sterile processing environments.
Additionally, the American Conference of Governmental Industrial Hygienists (ACGIH) recommends that short-term exposure should not exceed five times the
8-hour TWA, meaning exposure should remain below 5 ppm.
Because many of these exposure events can occur during routine workflows rather than equipment failures, the hospital wanted a system that could provide real-time verification that its environment remained safe.
The Solution
To address these concerns, the hospital implemented ChemDAQ hydrogen peroxide monitoring systems in the sterile processing department.
Sensors were strategically placed:
- Outside the sterilizer doors, in the staff breathing zone, where vapor would most likely be detected during unloading
- On top of the sterilizer units, where escaping vapor could accumulate
This placement ensures that any unexpected vapor release, whether from door seals, ventilation issues, or workflow events, can be detected immediately.
Continuous monitoring provides:
- Real-time measurement of hydrogen peroxide vapor levels
- Immediate alerts if exposure thresholds are exceeded
- Objective data that supports safe workplace practices
The Result
Since installing ChemDAQ monitoring systems in 2012, the hospital has experienced more than a decade of reliable performance.
During this time, the monitoring system has operated consistently without issues. The sterile processing team emphasizes that the most valuable benefit is the confidence the system provides.
According to the sterile processing team:
“We have never had leaks with our sterilizers, but it is great having peace of mind knowing that our leadership continues to consider our team’s safety.”
Strengthening the Hospital’s Safety Commitment
Hospitals are responsible for keeping patients, staff, and visitors safe. In sterile processing, where chemical sterilants are used daily, monitoring environmental conditions helps ensure compliance with the required conditions.
By implementing continuous hydrogen peroxide monitoring, this South Carolina hospital demonstrates its commitment to protecting the people who support critical sterilization operations.
Nearly 15 years after installation, the system continues to provide an added layer of safety, helping verify that hydrogen peroxide vapor levels remain well within recommended exposure guidelines while supporting a culture of safety in the sterile processing department.