The Food and Drug Administration has allowed medical devices that rely on artificial intelligence algorithms onto the market, but so far, the agency has given the green light only to devices with "locked algorithms" -- those that remain the same as the product is used until they're updated by the manufacturer. Systems with algorithms that evolve and sharpen on their own, however, are already in development. Unlock this article by subscribing to STAT Plus and enjoy your first 30 days free! STAT Plus is STAT's premium subscription service for in-depth biotech, pharma, policy, and life science coverage and analysis. Our award-winning team covers news on Wall Street, policy developments in Washington, early science breakthroughs and clinical trial results, and health care disruption in Silicon Valley and beyond.