At a time when U.S. health care costs have been rising faster than inflation, the prices for many medical devices have been dropping.
Included in the price declines are devices that helped build companies that employ tens of thousands of Minnesota workers.
Key changes are driving the trend. The hospitals that buy most of the implantable medical devices in America have grown wary of incremental improvements long used by device makers to prop up prices on pacemakers, defibrillators and the like.
And in a reverse of another long-standing practice, medical device makers are finding it much harder to rely on physician brand loyalty to drive purchasing decisions.
Major med-tech corporations have responded by buying emerging companies with hot products that can still command premium prices, like heart valves implanted via small tubes that can cost four times as much as traditional valves.
Device giants are also looking to dominate the market for fast-growing diseases like heart failure with a broad array of treatments.
But such strategies have not stopped the overall slide.
"Historically, a lot of [med-tech] suppliers, once they were in a hospital, they just felt no risk of loss of business," said Ginny Borncamp, purchasing director for Allina Health, which had $3.6 billion in net operating revenue in 2014. "So they were able to hold the line wherever they wanted it. And I think that is what has changed."