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    Stability Testing

    Studies that establish how device performance and packaging hold up over time.

    Reviewed by Christian Espinosa, Founder, Blue Goat CyberLast reviewed May 5, 2026

    Definition

    Stability testing - including accelerated aging (often per ASTM F1980) and real-time aging - generates data to support shelf-life claims, packaging integrity, and continued sterility for terminally sterilized devices.
    What the regulation says
    The FDA, under 21 CFR Part 820, Quality System Regulation, requires manufacturers to establish and maintain procedures to control product design, including stability to ensure the medical device conforms to its specified requirements throughout its shelf life. Similarly, the EU MDR, in Annex I, General Safety and Performance Requirements, mandates that devices be designed and manufactured in such a way that they will not compromise the clinical condition or the safety of patients, or the safety and health of users or, where applicable, other persons, when implanted, used or maintained according to their intended purpose and that the device will perform as intended during its expected lifetime. ISO 13485:2016, clause 7.3.7, design validation, also emphasizes that design validation shall be performed in accordance with planned arrangements to ensure that the resulting product is capable of meeting the requirements for the specified application or intended use, implicitly covering stability. ISO 11607-1 further details requirements for packaging for terminally sterilized medical devices, including aspects related to shelf life.

    What this means in practice

    Real-time data must eventually replace accelerated estimates. Stability data supports labeling claims and is reviewed during 510(k)/PMA submissions and Notified Body audits.

    Examples

    • A manufacturer conducts accelerated aging testing on a new sterile catheter to establish a preliminary 3-year shelf life, submitting this data for a 510(k) premarket submission.
    • A company performs real-time aging studies on a prosthetic implant, storing samples for 10 years to confirm its structural integrity and material biocompatibility over its intended useful life.
    • After a change in the sterilization method for a surgical instrument, the manufacturer initiates new stability testing to ensure the validated shelf life remains unaffected and the sterility barrier maintains its integrity.
    Common pitfalls
    • •Failing to establish a documented stability testing plan before device launch can lead to regulatory non-compliance.
    • •Extrapolating accelerated aging data too far beyond validated real-time data without sufficient justification is a common pitfall.
    • •Not considering the impact of multiple sterilization cycles or reprocessing on device stability for reusable devices can lead to safety issues.
    • •Inadequate sample sizes for stability studies may result in statistically unreliable data.
    • •Changes in materials or manufacturing processes without re-evaluating stability can invalidate existing shelf-life claims.

    Frequently asked questions

    The primary purpose is to generate evidence proving that a medical device will maintain its safety, quality, and performance characteristics over its stated shelf life, under specified storage conditions.
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    Primary references

    3 sources
    Link health: 3 verified· last checked 2026-06-20
    ASTM·1ISO·1IMDRF/GHTF·1
    1. 1
      ASTM F1980
      Verified
      ASTMastm.org
    2. 2
      ISO 13485 Standard Page
      Verified
      ISOiso.org
    3. 3
      GHTF/IMDRF Process Validation Guidance
      Verified
      IMDRF/GHTFimdrf.org

    Inline markers like [1] jump to the matching reference above.