SDV is a quality activity where monitors verify that data captured in eCRFs accurately reflect source documents (typically the EHR, lab reports, or paper records). Traditional 100% SDV is costly, so ICH E6 and FDA's risk-based monitoring guidance support targeted SDV focused on critical data, such as primary endpoints, eligibility and serious adverse events, combined with central statistical monitoring. Monitoring plans state the SDV approach, and findings become queries the site must resolve before database lock.

Why it matters

Risk-based monitoring approaches under ICH E6(R3) reduce the volume of SDV in favor of targeted verification of critical data and processes.

Common pitfalls

•Over-reliance on 100% SDV can be inefficient and may not improve data quality as much as risk-based approaches.
•Inadequate documentation of source data can complicate or invalidate SDV efforts.
•Failure to define critical data elements can lead to misdirected SDV activities.
•SDV should not be the sole method for ensuring data quality, as it does not detect all types of errors or fraud.

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

Regulatory pathway choice - 510(k) vs PMA, 510(k) vs De Novo, Abbreviated vs Special 510(k).
Quality systems - QSR vs ISO 13485, QMSR vs QSR.
Software classification - SaMD vs SiMD, Locked vs adaptive AI.
EU frameworks - MDR vs IVDR, CE Mark vs UKCA.
Cybersecurity artifacts - SPDX vs CycloneDX SBOM, CVE vs CVSS.
Post-market actions - Recall vs field action, Removal vs correction.

How to use this tool

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.