Parametric Release and Sterile Product Release Protocols
High-precision EO Sterilization Chamber for Parametric Release Compliance.
1. Monitoring Capabilities for Parametric Release
In accordance with GB/Z 44877-2024 u GB 18279-2023, equipment used for parametric release must exceed standard monitoring capabilities. This includes:
- Airflow Monitoring: Mandatory installation of air circulation devices and anemometers in pre-conditioning, sterilization, and aeration chambers.
- Direct Humidity: Real-time measurement during the treatment phase.
- EO Concentration: Direct measurement at all required intervals during exposure.
- Dual Temperature Points: At least two independent sensor locations representing the chamber state.
1.1 Sensor Technologies & Calibration
Humidity Measurement
Measured via Capacitance Film (Relative Humidity) or Spectroscopy (Absolute Humidity). Sensors must be calibrated using saturated salt solutions and protected from EO-induced drift through frequent validation or thermal isolation.
Integrated Humidity and EO Concentration Monitoring Systems.
EO Concentration (Spectroscopy & GC)
Accuracy and precision must be documented. IR Spectroscopy (Infrared absorption) or Gas Chromatography (GC) are the standard methods. External sampling lines must utilize Heat Tracing to prevent condensation.
2. Sterile Release of Products (Chapter 11)
2.1 Criteria for Parametric Release
Routine sterile release is based solely on physical processing parameters meeting established specifications during validation. Unlike traditional methods, it does not rely on Biological Indicator (BI) testing results. A documented review by authorized personnel is mandatory.
Documented Review and Physical Parameter Control for Batch Release.
2.2 Sensor Integrity and Accuracy
If control or monitoring sensors fail to meet specifications, or if an investigation cannot confirm the accuracy of chamber readings, the load must be considered non-compliant.
3. Deviations and Investigations
3.1 Handling Out-of-Specification (OOS) Data
When parameters exceed limits, an investigation must determine the root cause. Products must be quarantined until a safety assessment is completed.
Load Characteristics: If EO or humidity data is OOS while controls are normal, evaluate the loading pattern. Differences in absorption compared to the initial PQ load may be the cause.
3.2 Corrective Actions and Re-release
If a sensor fails, the process may temporarily revert to Biological Indicator release during repairs. Parametric release can be resumed only after equipment repair and re-calibration.
Calibration and Maintenance Ensuring Sensor Precision for Continuous Parametric Release.
Critical Note: A process that fails parametric release specifications should not be released based on successful BI results. Furthermore, parametric release cannot be used to override a failed BI test.