Medical packaging must meet strict hygiene standards to ensure sterility and patient safety. The article explains which international guidelines and materials apply and how validation and documentation ensure reliable and compliant packaging solutions.
Summary of this article
Medical packaging does not automatically comply with hygiene standards because of a single material or certificate. Compliance results from a demonstrably controlled system of risk analysis, material selection, packaging design, validated processes, transport protection and documentation. For terminally sterilised medical devices, the packaging system must enable sterilisation, provide physical protection and maintain sterility until the point of use.
A medical device may have been properly cleaned and sterilised, but it can still become unsafe if its packaging is damaged during sealing, handling, transport or storage. Packaging is therefore an essential link between production and safe use.
It is more accurate to speak of demonstrably maintaining sterility than of “absolutely guaranteeing” it. The required level of protection depends on the medical device, the sterilisation method, the intended shelf life, the logistics route and the conditions under which the product is opened. In addition to microbial barrier properties, factors such as seal integrity, puncture resistance, moisture sensitivity, ageing, shocks and vibrations must also be considered.
ISO 11607 is the central packaging standard for terminally sterilised medical devices. ISO 11607-1 covers requirements for materials, preformed sterile barrier systems, sterile barrier systems and complete packaging systems. ISO 11607-2 focuses on the development and validation of forming, sealing and assembly processes.
Other relevant frameworks each serve a specific purpose:
Not every medical packaging solution must be produced in a cleanroom. The required production environment should be determined by the risk analysis, the product, the process steps and the function of the packaging. ISO 14644-1 classifies air cleanliness based on the concentration of airborne particles. This is not the same as demonstrated sterility. Microbiological control, cleaning and process hygiene require additional, application-specific measures.
The process starts with clear design input. What must the packaging protect? Which sterilisation method will be used? How long will the product be stored? Which stresses will occur during internal transport, distribution and use?
Materials, closures, seals, interiors and production processes are then selected and designed accordingly. Important control measures include:
A sterility test on the finished product alone is not a substitute for a controlled and validated process. Reliability is achieved by defining and qualifying critical process parameters in advance and monitoring them during routine production. ISO 11607-2 specifies validation requirements for forming, sealing and assembly processes.
Not every packaging material is automatically required to be biocompatible. A biological evaluation in accordance with ISO 10993 is particularly relevant when a material may come into direct or indirect contact with the patient, or when the transfer of substances to the medical device presents a realistic biological risk. Biological safety should therefore be assessed as part of the risk-management process.
For many protective and transport packaging solutions, other properties are more important. These include cleanability, low particle shedding, chemical resistance, moisture resistance, mechanical strength and compatibility with cleaning or disinfection agents.
For a sterile barrier system, the material and construction must be suitable for the chosen sterilisation method, such as ethylene oxide, radiation or moist heat. The combination must be assessed for barrier performance, seal strength, ageing and potential material changes. Material selection can therefore never be separated from the complete packaging system and the conditions in which it will be used.
Validation demonstrates that a process consistently delivers the required result under defined conditions. For sealing and assembly processes, this generally consists of installation qualification, operational qualification and performance qualification: IQ, OQ and PQ. Design inputs, acceptance criteria and test methods must be established in advance.
Documentation may include specifications, drawings, risk analyses, validation protocols, test reports, batch data, change control and deviation investigations. Changes to materials, suppliers, equipment, process settings or logistics routes should trigger an assessment of whether requalification or revalidation is required.
At Faes, we translate medical, logistical and technical requirements into a manufacturable protective or transport packaging solution around the product and, where applicable, its primary or sterile packaging. We consider not only protection, but also cleanability, handling, traceability, reuse, maintenance and integration into the supply chain.
Our own cleanroom enables us to clean and package products under controlled conditions. This does not automatically mean that a packaging solution is sterile. It does, however, allow us to reduce contamination risks in a controlled manner and tailor the solution to the required cleanliness levels and customer specifications. The necessary activities, materials and cleanliness requirements are determined based on the agreed requirements specification.
We combine packaging development and custom engineering with production, assembly and support for testing and specification. By involving Faes at an early stage, product risks, transport loads, material selection and cleanroom requirements can be assessed as one integrated challenge. This helps prevent packaging from providing insufficient protection or, conversely, being designed to a cleanliness level that is unnecessarily complex and expensive.
Hygiene is therefore not an isolated material property, but part of a controlled system in which the product, packaging, process and logistics chain are demonstrably aligned.
Carlo Leijten is an account manager at Faes specializing in medical applications and audiovisual equipment. He helps customers in these plastics industries develop customized packaging solutions that meet stringent requirements for protection, cleanability and mobility.
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