Premarket approval (PMA)

Premarket approval (PMA) is the FDA's review process for Class III medical devices, those that support or sustain human life, are of substantial importance in preventing impairment of health, or present a potentially unreasonable risk of illness or injury. Examples include implantable heart valves, pacemakers and some diagnostic tests. A PMA requires valid scientific evidence that the device is safe and effective for its intended use.

How it works

Unlike 510(k) clearance, which relies on comparison to an existing device, a PMA must stand on its own evidence. That usually means clinical studies, often run under an investigational device exemption (IDE), the device equivalent of an IND. The application includes clinical and nonclinical data, manufacturing information and proposed labeling.

The FDA conducts a filing review, a substantive scientific review, and usually an inspection of manufacturing facilities. For novel or high-profile devices it may refer the application to an expert advisory panel, similar to an advisory committee for drugs. The statute calls for a decision within 180 days, though total review time is often longer when the FDA requests additional information. Outcomes include approval, an approvable letter, a not-approvable letter or denial.

Changes to an approved device generally require a PMA supplement.

Why it matters for traders

For a small medtech company betting on one Class III device, the PMA decision is a binary catalyst comparable to a drug PDUFA date. Panel meetings, FDA requests for more data and post-approval study requirements all produce news. Approval can also bring a meaningful competitive moat, since rivals must run their own trials rather than cite a predicate.

Example

A hypothetical device maker, Clearwater Devices (CLWD), completes a 500-patient pivotal trial of a heart valve under an IDE and submits a PMA. The FDA convenes an advisory panel, which votes in favor, and approval follows about a year after submission. CLWD shares rise 25% on the news.

FAQ

What is the difference between PMA and 510(k)?

A PMA requires independent evidence of safety and effectiveness, usually from clinical trials, and applies to high-risk devices. A 510(k) shows equivalence to an existing device.

Is a PMA like an NDA?

Broadly, yes. It is the device world's equivalent of a full new drug approval.