Sterile Barrier System Testing

Scope

Sterile barrier system testing covers the evaluation and validation of medical device packaging against the requirements of ISO 11607, demonstrating seal strength, package and seal integrity, and the maintenance of sterility through the package’s life cycle. The specific test set is selected to cover the package type, sterilization method, and distribution profile.

Key elements within the scope include:

• Seal strength – measuring the peel strength of the seals (ASTM F88) to confirm they are within the acceptable window – strong enough to maintain integrity, peelable enough to open cleanly
• Burst and creep integrity – pressurizing the package to assess seal integrity and the weakest area (ASTM F1140 unrestrained, ASTM F2054 restrained)
• Seal integrity / leak detection – dye penetration for channel defects in seals (ASTM F1929) and bubble/internal-pressure leak tests (ASTM F2096) to detect gross leaks
• Visual inspection – examination of seals and the package for defects (ASTM F1886)
• Distribution simulation – subjecting packages to the hazards of shipping and handling (ASTM D4169) and re-testing integrity afterward
• Aging studies – accelerated and real-time aging (ASTM F1980) to establish and verify shelf life, with integrity confirmed after aging
• Sterilization compatibility – testing the package in its post-sterilization condition, since sterilization processes can affect materials and seals
• Two-part validation – addressing both ISO 11607-1 (system requirements) and ISO 11607-2 (forming/sealing process validation)

Applications

• Medical device packaging validation – demonstrating that a sterile barrier system meets ISO 11607 for terminally sterilized devices, a prerequisite for placing the device on the market
• Pouches and tray/lid systems – validating the common sterile barrier formats – peelable pouches and lidded thermoformed trays
• Packaging process validation – qualifying the forming, sealing, and assembly process per ISO 11607-2 so that the process reliably produces integral packages
• Shelf-life establishment – using accelerated and real-time aging to establish and substantiate the labeled shelf life of the packaged sterile device
• Packaging or process change control – re-validating when packaging materials, package design, sealing equipment, or sterilization method change
• Distribution qualification – confirming the package maintains its barrier after the rigors of its actual distribution environment
• Supplier and incoming material qualification – verifying that barrier materials and preformed packaging meet requirements

Benefits

• Demonstrates sterility is maintained to the point of use – the coordinated test program confirms the package keeps the device sterile through sterilization, distribution, storage, and opening, which is fundamental to patient safety
• Addresses the full package life cycle – by combining seal strength, integrity, distribution, and aging testing, SBS testing covers everything the package must survive, not just its as-made condition
• Supports ISO 11607 conformance – the testing provides the evidence needed to demonstrate the package meets the internationally recognized requirements for terminally sterilized device packaging
• Catches both weak and overly strong seals – seal strength testing ensures seals maintain integrity yet still peel open cleanly without compromising the sterile presentation of the device
• Validates the packaging process, not just the package – covering ISO 11607-2 confirms the sealing/forming process consistently produces integral packages, not just that one sample passed
• Substantiates shelf life – aging studies provide the basis for the package’s claimed shelf life, supported by integrity data after aging