A Special 510(k) work instruction sounds like a formatting exercise, but the risk analysis and performance summary sections inside it are exactly where CDRH's expected template matters most.
Deficiency letters over formatting, not substance
A submission can have sound risk analysis and solid performance data and still come back with a deficiency letter, because the summary wasn't organized into the structure CDRH's reviewers expect to see.
- Comparing the subject device against the predicate device's cleared indications and technological characteristics
- Citing FDA guidance directly rather than paraphrasing it
- Organizing supporting data (risk analysis, performance testing, labeling) into the applicable submission exhibits
What an incomplete comparison risks
An FDA Refuse-to-Accept or Additional Information request is often triggered by an incomplete substantial equivalence comparison or a missing required exhibit, not by a flaw in the underlying test data itself.
What the work instruction delivered
Delivering the risk analysis summary and performance test template required for the 510(k) submission gave future submissions a structure built to CDRH's expectations from the start.
The Real Takeaway
510(k) risk analysis and performance test summaries have to be written to the template CDRH actually expects.
Otherwise the submission comes back with a deficiency letter over formatting, not substance.