Clinical Evaluation: Article 61, Annex XIV Part A and Equivalence
Clinical evaluation is where most pre-registration files fail. The exam tests whether you can construct a defensible evidence route under Article 61 and Annex XIV Part A rather than assert that a literature review was performed.
The two documents
A clinical evaluation plan precedes the evidence: it states the intended purpose, target population, indications and contraindications, the claims to be supported, the method (clinical investigation, literature, equivalence or a justified combination), the appraisal criteria and the PMCF approach. The clinical evaluation report then documents the appraisal and concludes that the evidence demonstrates conformity with the relevant general safety and performance requirements.
Equivalence (Article 61(4))
Equivalence to another device requires three cumulative conditions: the same clinical condition or purpose, in the same body site and population, with similar relevant safety and performance; technical similarity sufficient not to affect safety and performance; and biological similarity, including contact materials and substances. Only once equivalence is established may the other device's clinical data be used. Under Article 61(5), implantable and Class III devices face a stricter bar on relying on another manufacturer's data, and Article 61(6) requires a clinical investigation for implantable devices unless the device is a modification of the same manufacturer's already CE-marked device with no significant change.
Literature route
The literature route is not a shortcut. It requires a documented search protocol and databases, appraisal against pre-defined criteria, and a justification for why published data are sufficient for the device's own claims.
Worked example
A Class IIb hernia mesh claims equivalence to a competitor's mesh. Materials and indication match, but the three-dimensional structure and coating differ and no clinical data are presented for the competitor in the claimed indication. The equivalence claim fails on the technical condition and on data availability, so the manufacturer must either run its own investigation or generate adequate clinical data.
Traps
Claiming equivalence on materials alone; reusing a CER across devices with different indications; omitting the justification required where evidence is not generated by investigation; and forgetting that the report must be updated through PMCF across the lifecycle.