Comprehensive Understanding of Filter Integrity Testing and Its Role in Sterile Pharmaceutical Production
Filter integrity testing is a critical quality assurance procedure used to confirm that sterilizing-grade filters function correctly before and after filtration processes. It ensures that filters used in pharmaceutical, biotechnology, and food industries maintain structural integrity and can effectively remove microorganisms and contaminants.
There are several commonly used integrity test methods, including bubble point testing, diffusion testing, pressure-hold testing, and forward flow methods. Each test assesses how well a filter maintains barrier performance under pressure. Sterile filtration is widely used for heat-sensitive drugs, biologics, and media preparations, making integrity testing essential for patient safety.
Integrity testing is performed both pre-use and post-use. Pre-use testing confirms that the installed filter is undamaged and correctly positioned. Post-use testing verifies that the filter has not been compromised during the filtration process. Regulatory bodies such as the FDA and EMA require documentation of these results for compliance.
Compromised filters can lead to contamination, product…