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    In-depth, attribute-by-attribute tables for the most common MedTech term pairs. Each row is sourced from the linked term pages.

    Post-Market

    Section 522 Postmarket Surveillance(Section 522)

    In one line
    FDA's authority to order manufacturers to conduct post-market surveillance studies on certain Class II or Class III devices.
    Definition
    Section 522 of the Federal Food, Drug, and Cosmetic Act gives FDA authority to require manufacturers to conduct post-market surveillance of Class II or Class III devices when the device meets one of four conditions: failure of the device would be reasonably likely to have serious adverse health consequences; the device is expected to have significant use in pediatric populations; the device is intended to be implanted in the body for more than one year; or the device is intended to be a life-sustaining or life-supporting device used outside a device-user facility. FDA issues a Section 522 order specifying the surveillance question, study design expectations, and timing.
    Why it matters
    Section 522 surveillance answers device-specific postmarket safety or effectiveness questions using an appropriate study design. Submit a proposed surveillance plan within 30 days after receiving the order, and begin surveillance within 15 months after FDA issues the order. Noncompliance may render the device misbranded.
    Common pitfalls
    • •Do not assume section 522 surveillance must use a registry or cannot involve a clinical investigation. Choose a design responsive to the surveillance question and assess applicable human-subject and IDE requirements.
    • •Missing the 30-day plan deadline, FDA can take enforcement action for non-response.
    • •Designing a 522 study without engaging the sponsor's medical and statistical teams early, 522 questions are often hard to answer without large real-world data sources.
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    Why compare MedTech terms side by side?

    MedTech terminology is full of pairs that look interchangeable but carry very different regulatory, clinical, and commercial consequences. Picking the wrong framework, pathway, or standard early in a project can add months to a submission, invalidate clinical evidence, or trigger an audit finding. Side-by-side comparison is the fastest way to surface those differences before they become costly mistakes.

    Each comparison on this page pulls from the same vendor-neutral, sourced definitions used throughout the MedTech Terms glossary. You see the one-line summary, the formal definition, why it matters in practice, common pitfalls, and the primary sources (FDA guidance, EU MDR/IVDR articles, ISO/IEC standards, MDCG documents, IMDRF principles) that back each entry. That makes the comparison defensible in regulatory strategy memos, design reviews, and submission narratives.

    Common comparison patterns

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    Pick term A and term B from the dropdowns, or click a preset above. The URL updates with both slugs so you can bookmark or share the exact comparison with a colleague, a notified body reviewer, or your regulatory consultant. Click Open full page on either side for the complete entry, including FAQs, related terms, and the full citation list. If you are not sure which term to start with, browse the Categories view or the A-Z index.

    MedTech Terms is a vendor-neutral community resource sponsored by Blue Goat Cyber. Definitions are written for educational use and are not legal or regulatory advice.