Standards in sterile processing are constantly evolving—and for good reason. As technologies advance and patient safety expectations grow, organizations like the Association for the Advancement of Medical Instrumentation(AAMI) continue refining best practices for instrument reprocessing.
Two standards currently shaping conversations across sterile processing departments (SPDs) are AAMI ST91 and ST58, both of which introduce important updates that impact daily workflows, documentation, and compliance expectations.
Understanding these changes is essential for SPD teams that want to stay ahead of survey requirements, reduce risk, and maintain consistent quality. In this article, we’ll break down what’s changing, why it matters, and how tracking technology can help teams keep pace.
Healthcare reprocessing standards evolve in response to real-world challenges. One of the most notable catalysts was the 2015 CRE outbreak linked to duodenoscopes, which highlighted the risks associated with flexible endoscope reprocessing and sparked industry-wide change.
In response, AAMI introduced ST91 in 2015 to establish clearer best practices for cleaning, disinfecting, and storing flexible endoscopes. Over time, additional revisions were introduced to address emerging technologies and infection prevention concerns.
A major update arrived with ANSI/AAMI ST91:2021, which strengthened guidance around how certain scopes should be processed and when sterilization should replace high-level disinfection (HLD).
These updates signal a broader shift in thinking: sterilization is increasingly viewed not as an optional upgrade, but as a critical safety measure for certain devices.
Historically, high-level disinfection was considered the gold standard for many endoscope reprocessing workflows. However, newer guidance emphasizes that certain flexible endoscopes should be sterilized whenever possible, particularly those that contact sterile body spaces.
This shift reflects growing awareness that complex instrument designs can harbor bacteria even after traditional reprocessing.
Regulatory and industry responses continue to evolve:
For SPD leaders, this means staying informed about both current guidance and future technology developments that may reshape endoscope workflows.
While updates to standards often sound technical, they translate directly into daily workflow changes inside SPD.
Several key practices highlighted in current guidance include:
Flexible endoscope lumens should be dried using instrument air or HEPA-filtered air with sufficient drying time to prevent bacterial growth.
Following manufacturers’ instructions for use (IFUs) and avoiding overloading sterilizers helps prevent failed cycles and incomplete sterilization.
Using Type 4 chemical indicators instead of Type 1 indicators during terminal sterilization provides more meaningful information about sterilization parameters.
Departments must consider toxicity, exposure pathways, and occupational safety guidelines when selecting chemical sterilants or disinfectants.
While these steps may seem small, they play a significant role in improving patient safety and maintaining compliance.
Another major focus within AAMI updates—particularly ST58—is documentation and traceability.
Quality monitoring and record keeping are essential components of any sterile processing program. Electronic documentation is strongly recommended because it improves:
When documentation is incomplete or difficult to retrieve, responding to issues such as failed biological indicators or sterilization errors becomes significantly more challenging.
Digital tracking systems can help SPD teams quickly identify which instruments were processed in a particular cycle and determine the scope of any potential recall.
ST58 also emphasizes the importance of continuous quality improvement (CQI) programs within sterile processing.
These programs often include monitoring and improvement initiatives such as:
Data plays a central role in making CQI programs effective. Without reliable information about loads, parameters, and outcomes, identifying improvement opportunities becomes difficult.
Modern sterile processing environments generate a significant amount of data—from sterilizer cycles to maintenance tasks and quality audits.
Tracking platforms like CensiTrac and ScopeTrac Advanced help centralize this information, providing SPD teams with tools that support both compliance and operational efficiency.
Digital systems can help teams:
When surveyors ask for documentation, having centralized digital records allows SPD teams to respond confidently rather than scrambling to gather information from paper logs or multiple systems.
AAMI standards will continue evolving as healthcare technology advances, and infection prevention expectations grow.
For sterile processing teams, staying ahead means focusing on three core areas:
When these elements work together, departments can move beyond simply reacting to standards and instead build systems that support consistent compliance and patient safety every day.