ASTM D3078
Standard test method for determining gross leaks in flexible packaging by bubble emission.
Test solution
Medical Device Leak Testing
Medical device packaging carries a burden most other packaging formats don't, since it has to protect sterility from the moment it leaves the sterilizer until a clinician opens it, sometimes months or years later. Medical device leak testing exists to prove that the sterile barrier will actually hold for that entire shelf life, not just at the moment it comes off the sealing line. Regulatory frameworks built around ISO 11607 require manufacturers to validate packaging integrity as part of the design and production process, which is where structured medical device leak testing earns its place in a quality system. The sections ahead cover what packaging testing must demonstrate, how it fits within ISO 11607 validation, and how to define acceptance criteria your quality team can defend.
- 30s Average test cycle
- ±0.1 mbar Pressure resolution
- 30+ Countries trusted
- ASTM D3078 & F2096 compliant
Applicable test standards
ASTM F2096
Detection of gross leaks in packaging by internal pressurization (bubble test).
Recommended equipment
Seal Integrity Tester
The SEAL-CHECK Seal Integrity Tester is a versatile and dependable solution engineered for precise seal integrity inspection and leak detection across a wide variety of packaging types. Designed for industries that demand the highest levels of product safety and quality, this advanced seal integrity tester provides accurate, repeatable results to ensure that every package meets strict performance and compliance standards.
REQUIREMENTS
What Must Medical Device Packaging Testing Demonstrate?
Medical device packaging testing needs to demonstrate that the sterile barrier system maintains its integrity across the full lifecycle of the product, from initial sterilization and sealing through warehouse storage, transit, and handling right up to the point of use. That means testing has to reflect real conditions rather than only checking a freshly sealed package under ideal lab conditions, since a seal that passes on day one still has to hold after months on a shelf or a rough transit route. It also means the test method itself needs to be sensitive enough to catch small, gradual failures that develop from material fatigue or seal creep over time, since these rarely produce any defect visible on a routine inspection.
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ISO 11607
Where Leak Testing Fits Within ISO 11607 Packaging Validation
ISO 11607 sets out requirements for materials, sterile barrier system design, and packaging processes for terminally sterilized medical devices, and leak or integrity testing is one of the practical tools used to validate that a packaging design actually meets those requirements. Validation typically happens at multiple stages, covering the initial design, ongoing production, and after any change to materials or process. Documentation from each stage feeds into the device’s overall design history file, giving a manufacturer a clear record showing that packaging integrity was verified at each point where the design or process could realistically have changed.
Package Integrity vs Seal Strength
Integrity testing confirms the seal maintains a barrier against microbial ingress, while seal strength testing measures the mechanical force needed to peel or separate the seal. Both matter, but they answer different questions. A seal can be mechanically strong and still allow a microscopic leak, which is why integrity testing is treated as a distinct requirement rather than something a strength test alone can satisfy.
Integrity Testing vs Ageing and Transit Testing
Integrity testing confirms a seal holds at a given point in time, while ageing and transit testing simulate the stress of storage and shipping over the product’s shelf life. A device manufacturer typically needs both: ageing and transit testing to prove the packaging design withstands real-world conditions, and integrity testing to confirm that individual production batches meet the same standard the validated design was built around.
How Does the Medical Device Packaging Leak Tester Work?
Leak testing for medical devices is an essential part of quality control. The process involves using a vacuum or pressure-based leak detection system to detect even the smallest leaks in the packaging. Here’s how it typically works:
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Test Chamber Setup
The medical device package is placed inside a test chamber. This chamber may either be filled with dry air or water, depending on the testing method being used.
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Vacuum Application
The test chamber is sealed, and a vacuum is created to reduce the pressure inside. This simulates the conditions the packaging might encounter during transport or storage.
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Leak Detection
If there is a leak, air or gas will escape from the package, creating visible bubbles in the water or a pressure drop in the chamber. This is typically detected using sensors or visual inspection. For some devices, advanced electrical conductivity or pressure differential methods can be used to detect leaks without damaging the packaging.
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Inspection and Sorting
Once a leak is detected, the system automatically rejects the faulty package, ensuring that only those with an intact seal continue to the next stage of production. This helps eliminate the risk of defective packages reaching consumers or healthcare providers.
BARRIER TYPES
Porous vs Non-Porous Sterile Barrier Systems
Porous materials like Tyvek allow sterilization gas to pass through the packaging while still blocking microbial penetration once sealed, which makes them common for ethylene oxide and gas plasma sterilized devices. Non-porous materials, such as certain foils and films, are used with sterilization methods like gamma or e-beam that don’t require gas exchange through the package. The testing approach differs slightly between the two, since porous materials need methods that don’t damage or clog the material’s microbial barrier properties during the test itself. A method that works well on a foil laminate can be entirely unsuitable for a Tyvek lid, which is why the material combination on a given package needs to be considered before a test method is chosen, rather than applying the same protocol across every product line.
ACCEPTANCE CRITERIA
How to Define Acceptance Criteria for Medical Device Packaging Testing
Acceptance criteria should be based on the specific risk profile of the device and its intended use, the packaging material and format, and any applicable regulatory guidance for the product category. A well-defined criteria set specifies the test method, the exact parameters used, and the threshold a package must meet to pass, documented clearly enough that another team member, or an auditor, can reproduce the same result independently.
DEFECTS
Common Seal Defects in Medical Device Packaging
The defects that show up most often include channel leaks from contamination trapped in the seal area, incomplete seals from insufficient heat or pressure during sealing, seal creep or delamination that develops gradually during storage, and material defects such as pinholes unrelated to the sealing process. Many of these defects are undetectable by eye, which is the core reason instrumented testing is required rather than relying on a visual pass or fail.
TIMING
When Should Medical Device Packaging Be Leak Tested?
Testing should happen during initial packaging validation, as part of routine production quality control, after any change to materials, sealer settings, or sterilization method, and periodically throughout a product’s validated shelf life as part of ongoing stability studies. Treating leak testing as a one-time validation step rather than an ongoing practice leaves a quality system unable to catch drift that develops after the original design was approved.
Frequently Asked Questions
What are the benefits of using a Medical Device Packaging Leak Detector?
The benefits of using a Medical Device Packaging Leak Detector include ensuring the safety and quality of medical devices, preventing contamination and spoilage, reducing waste and cost associated with faulty packaging, and complying with regulatory standards and requirements. Medical device packaging leak detectors can also detect leaks in various types of packaging, allowing for comprehensive testing of medical devices.
How does a Medical Device Packaging Leak Detector work?
A Medical Device Packaging Leak Detector works by subjecting the sealed medical device packaging to a controlled amount of pressure or vacuum and then measuring any changes in pressure that occur. If there is a leak in the packaging, the pressure will change, indicating that the seal is not intact. This helps to ensure that the medical device is free from leaks and that the product inside is safe and of high quality.
How do you interpret the results of a Medical Device Packaging Leak Test?
The results of a Medical Device Packaging Leak Test are interpreted based on the method used for testing. Generally, a pass/fail criteria is used, with a pass indicating that the medical device packaging is intact and a fail indicating that there is a leak. The magnitude of the pressure change and the rate of pressure change can also provide additional information about the severity and location of any leaks. The test results should be analyzed by a trained operator or quality control personnel to determine the appropriate action to take.