What is the difference between accelerated aging and real-time aging?

Accelerated aging uses elevated temperatures to simulate the effects of natural aging in a shorter timeframe, often following standards like ASTM F1980. Real-time aging involves storing devices under normal conditions and testing them at various intervals over the actual claimed shelf life.

How does shelf life relate to package integrity?

For sterile devices, package integrity is paramount throughout the shelf life to maintain sterility. Aging studies must demonstrate that the packaging material and seals withstand environmental factors and time without compromise.

Can shelf life be extended after initial approval?

Yes, shelf life extension studies are common. They typically involve continuing real-time aging studies and collecting additional data to support a longer expiry date. Regulatory bodies usually require submission and approval of such extensions.

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Quality & RiskQuality System

Shelf Life

Period during which a device remains suitable for its intended use under specified conditions.

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

Definition

Shelf life is supported by accelerated aging and real-time aging studies, often per ASTM F1980, that demonstrate package integrity and product performance over time.

What the regulation says

Under the U.S. FDA, shelf life testing is critical for demonstrating that a medical device maintains its safety and effectiveness over its stated lifetime, as required by 21 CFR 820.30, Design Control. The EU MDR, in Annex I, General Safety and Performance Requirements, similarly mandates that devices be designed and manufactured in a way that they remain safe and perform as intended throughout their foreseen lifetime, including stability and storage conditions. ISO 13485:2016, clause 7.5.1, Production and service provision, also requires documented procedures for controlling product realization, which implicitly includes shelf life considerations for product quality.

What this means in practice

Shelf-life claims appear in labeling and must be supported by valid data. Extension studies are common as real-time data accumulates.

Examples

A manufacturer performs accelerated aging on a new sterile catheter package to support a preliminary 3-year shelf life claim, while simultaneously initiating real-time aging studies.
A company submits data from ongoing 5-year real-time aging studies to the FDA to extend the shelf life of their implantable device from 3 years to 5 years.
During a design change to a drug-eluting stent, the manufacturer conducts new accelerated and real-time aging studies to ensure the drug elution profile and stent integrity are maintained over the original shelf life.

Common pitfalls

•A common pitfall is relying solely on accelerated aging data without initiating or completing real-time aging studies, which are crucial for conclusive shelf life determination.
•Manufacturers sometimes fail to consider the impact of packaging degradation on device sterility or functionality throughout the claimed shelf life.
•Another mistake is not establishing a clear, scientifically sound justification for the chosen accelerated aging conditions, potentially leading to invalid shelf life claims.
•Inadequate sample sizes for aging studies can lead to statistically unreliable data, making it difficult to defend shelf life claims during regulatory audits.
•Failing to re-evaluate shelf life after design changes or material substitutions can result in non-compliant products on the market.

Frequently asked questions

Shelf life ensures that a medical device remains safe, effective, and performs as intended from its manufacturing date until the end of its designated period, guarding against degradation of materials, functionality, or sterility.

Shared paths + category

Manufacturing

Sterilization

Validated process used to render a device free from viable microorganisms.

Manufacturing & Supply Chain

Quality & Risk

Biocompatibility

Ability of a material to perform with an appropriate host response in a specific application.

Manufacturing & Supply Chain

Quality & Risk

Change Control

Formal QMS process for evaluating, approving, and implementing changes that could affect product quality or compliance.

Manufacturing & Supply Chain

Quality & Risk

IQ / OQ / PQ

Installation, Operational, and Performance Qualification - the three stages of equipment and process qualification.

Manufacturing & Supply Chain

Standards

ISO 10993-1

Biological evaluation of medical devices within a risk management process.

Manufacturing & Supply Chain · adjacent

Quality & Risk

Nonconformance (NCR)(NCR)

Failure of a product, process, or system to meet specified requirements.

Manufacturing & Supply Chain

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Primary references

3 sources

Link health: 3 verified· last checked 2026-06-20

ASTM·1MDIC·1FDA·1

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On this term

Category: Quality & Risk
Sources: 3
Updated: 5/5/2026

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Learn in 60 seconds

Period during which a device remains suitable for its intended use under specified conditions.

·Shelf-life claims appear in labeling and must be supported by valid data.
·Extension studies are common as real-time data accumulates.

Remember this

Watch out: A common pitfall is relying solely on accelerated aging data without initiating or completing real-time aging studies, which are crucial for conclusive shelf life determination.

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