Sterilization Validation: What Auditors Really Check

Author: V5 Medical Quality Assurance Team
Category: Sterilization / Validation

The Hard Truth

Auditors don’t fail sterilization because you chose EO (Ethylene Oxide) or Steam. They fail it because you can’t prove control.

1. Validation ≠ One-Time Qualification

Auditors expect a system, not just a report. You must demonstrate: * ✅ IQ / OQ / PQ completed * ✅ Ongoing monitoring * ✅ Trend analysis

2. The 5 Audit Killers in Sterilization

1. Load configuration not justified: Why did you stack the boxes that way?
2. BI placement: Was the Biological Indicator placed "conveniently", or in the worst-case location?
3. No rationale for cycle parameters: Can you scientifically defend your dwell time?
4. Incomplete revalidation: Did you re-validate after changing the packaging material?
5. Poor documentation discipline: If it isn't written down, it didn't happen.

3. What Auditors Actually Ask

• "Why this load pattern?"
• "What happens if humidity drifts?"
• "Show me last year’s BI trends."
• "Who approved this deviation?"

If you hesitate—you fail.

4. EO Sterilization: High Risk, High Scrutiny

For Ethylene Oxide, auditors focus heavily on ISO 10993-7 (Residuals), aeration validation, and worker safety. EO is never treated as "routine" in an audit.