Constat · Stage 1 · Premarket evidence

The evidence FDA actually accepted.

Every parsed AI/ML 510(k) summary as structured, source-quoted fields — validation design, endpoints, predicate chains — connected to what happened after clearance and how devices got paid.

Presence rates, never pooled.Every figure below is “reported in X of Y audited devices.” Performance values are never averaged across devices — each stays with its analysis unit, task, and a verbatim FDA quote. A device we haven’t parsed yet is queue, never “FDA accepted thin evidence.”

What evidence did FDA accept for devices like yours?

Keyword-based retrieval over the parsed corpus (names, algorithm descriptions, endpoints, source quotes) — not semantic search. Try: · ·

Corpus coverage — all panels

1,149 of 1,466clearances parsed, most-recent-first · 317 in parse queue · latest decision 2026-03-30

The hatched segment is our parse queue, not device data. Queued devices never count in any rate below — every denominator is audited devices only.

What the audited corpus reports

Evidence reporting

Any sensitivity metric286 of 1,149

Canonicalized — includes per-finding sensitivities, not just the summary's top-line slot.

Sensitivity and specificity238 of 1,149
Any performance metric604 of 1,149
Clinical (not bench-only) data826 of 1,149
Subgroup / demographic reporting649 of 1,149
Predetermined Change Control Plan38 of 1,149

“Not reported” is a real finding about what FDA accepted — the summary was audited and does not state it.

Metric presence (canonicalized)

  • sensitivity286 of 1149
  • specificity241 of 1149
  • auroc164 of 1149
  • ppv74 of 1149
  • npv38 of 1149
  • accuracy127 of 1149
  • f125 of 1149
  • dice236 of 1149
  • iou10 of 1149
  • detection_rate5 of 1149

Presence only — values are never pooled or averaged across devices. Each measurement lives on its device's page with its analysis unit and verbatim quote.

Median predicate age: 1.9y across 1434 of 2070 predicate edges (69% datable, dates backfilled from openFDA) — how old each cited predicate was when the child device cleared.

Study design & generalizability

Where FDA review is tightening — and what almost no premarket dataset reports. Each rate is presence over audited devices; a device that describes no clinical study is honestly “not reported” here.

Prospective or reader (MRMC) study197 of 1,149

Primary validation is prospective-clinical or a multi-reader design — not a retrospective bench run.

Multi-site validation510 of 1,149
External / out-of-distribution testing604 of 1,149

Validation data explicitly independent of the training/development set.

Scanner / device diversity596 of 1,149

Tested across more than one scanner or device manufacturer.

Subgroup performance broken out581 of 1,149

Performance reported per subgroup, not just an overall number.

Extraction quality. Every field carries a verbatim FDA quote. Across all 1,146 parsed devices we check every one of ~20,000 quotes against its source 510(k): 98.4% grounded (99% mean token recall; a reproducible, published method). Two records are also hand-audited against the full documents at 100% field accuracy, including a deliberate no-new-testing device to catch invented metrics. We measure fabrication, not interpretation — and publish the method.

One corpus, whole lifecycle

Every device page connects all four stages: clearance → evidence → postmarket → payment. Stages without data render as “not yet tracked”, never as empty or fabricated.

Machine access

The same retrieval over MCP — 12 tools across the lifecycle
curl -s https://constat.dev/api/mcp \
  -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call",
       "params":{"name":"evidence_search",
                 "arguments":{"panel":"Radiology","reports_any_sensitivity_metric":true}}}'

device_evidence_lookup, evidence_search, predicate_chain, device_postmarket_lookup, reimbursement_lookup, and more. Every extracted field carries a source quote and page — descriptive only, never a compliance judgment.

Connect the MCP endpoint

Follow the corpus as it grows

New parses land weekly, most-recent-first. Get notified as coverage expands and presence rates shift — and be first on the client digest when it ships.

Constat Precedent — the premarket evidence layer, by Health AI. Built on public FDA data (openFDA, accessdata.fda.gov); descriptive decision-support, not regulatory advice or consulting.