GuidelinesTesting data2026.10.04
Medical-Device Shelf-Life Evidence: Plan Aging and Product Performance Together
Packaging aging alone rarely answers every shelf-life question. Connect functional performance, material change, sterile barriers and storage conditions to the duration claimed.
Identify the attribute that may change first
Starting with “competitors claim three years” can miss the evidence needed. First identify attributes that may change during unopened storage. Adhesion, elasticity, leakage, accuracy, reagent response, battery condition and package barriers can limit different products.
A target duration is a planning input, not an established result. Define storage conditions, the starting point and whether the package is opened. Separate unopened shelf life, post-opening duration and reusable-device life so that sample and test needs become clear.
Separate product and packaging questions
An intact sterile package does not demonstrate unchanged device performance; working device functions do not establish barrier integrity. Identify which layer each supplier study addresses and mark the gaps.
| Subject | Examples of change | End-of-period question |
|---|---|---|
| Device function | Accuracy, flow, mechanical strength | Are labeled performance limits maintained? |
| Materials | Adhesion, hardening, discoloration, leaching characteristics | Are safety or function affected? |
| Packaging | Seal or barrier damage | Are protection and opening characteristics retained? |
| Accessories | Battery, lubricant or connection changes | Do they limit system use? |
These are practical review examples, not universal degradation mechanisms. Consider potential safety effects of material changes alongside the biological-evaluation guide.
Document accelerated-aging assumptions
If elevated temperature is used to shorten observation, explain which real-storage changes it represents. Do not copy temperature and acceleration factors by habit. Consider materials, degradation mechanisms and other influences such as moisture or light. Excessive heat may cause changes that a simple time conversion cannot justify.
The FDA-published ASTM F1980 scope concerns accelerated aging of sterile-barrier systems and does not cover every product/package interaction. Korean applicability needs separate assessment. Plan how accelerated results will be compared with real-time storage data and what happens if they disagree.
Use samples representing the marketed specification
Trace manufacturing lots, materials, sterilization and packaging configuration. Plan comparisons between initial, intermediate and final measurements, including destructive-test quantities and reserves. Grouping models requires a reason why the selected one represents the attribute being aged.
Where transport stress and aging are combined, document how the sequence reflects the supply route. Investigate storage excursions and their impact. Do not select only favorable samples or remove endpoints after seeing results; distinguish approved plan changes from deviations.
Write the conclusion in the same conditions as the label
Replace “stability passed” with a statement identifying models, storage conditions, duration and criteria met. A difference between study conditions and the labeled temperature range needs supporting justification. Consistently define whether duration starts from manufacture, sterilization or packaging.
Do not hide post-opening or reuse restrictions within unopened-storage results. Connect them separately to the instructions, using the device-labeling guide. Preserve raw data, analysis, conclusions and approvals for future reassessment.
Treat an extension as a new evidence decision
Changes to packaging, sterilization, material suppliers or manufacturing can alter the applicability of old studies. A longer claim needs evidence for the extended period, review of limiting attributes, and assessment of label and regulatory-change procedures. Clearly distinguish completed real-time evidence from planned future observations.
Bring reports, product/package specifications, the target duration and labeled storage conditions to a shelf-life evidence review. The objective is to identify what is supported and what still needs evidence, matching the precise duration and conditions rather than counting reports.
Sources checked: 2026-09-28. The tables and preparation steps are practical suggestions; confirm the legal submission scope and applicable standards for the particular product.
Frequently asked questions
- Q. Does accelerated aging prove every shelf-life claim?
- No. Check whether the accelerated conditions represent the real degradation mechanism and which product and package attributes were evaluated. Plan appropriate real-time support.
- Q. Can an overseas label’s duration be copied?
- Review underlying evidence for the actual model, materials, manufacturing, sterilization, packaging and storage conditions. A brand-level duration does not establish the claim for the Korean product.
- Q. Are shelf life and service life the same?
- Unopened storage, post-opening use, reuse cycles and operating life are different claims. Define their terms, starting points and evidence separately.