Magnolia Medical Technologies makes a product that aims to reduce the rate of false positive diagnoses of sepsis.

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Seattle-based Magnolia Medical Technologies has raised $13.8 million to continue developing a product that aims to provide accurate blood tests.

Magnolia makes the SteriPath blood-collection system, which is meant to decrease the number of false positives for sepsis, a complication of a bloodstream infection that is often treated with antibiotics and can be life-threatening.

Such false positives can mean that patients are given procedures and treatments they don’t need, exposing them to more risk, Magnolia said in a news release announcing the funding. More than 1 million people in the U.S. are misdiagnosed with sepsis each year, the company said.

Menlo Park, Calif.-based HealthQuest Capital led the funding round and announced managing partner Garheng Kong would join Magnolia’s board.

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SteriPath is commercially available, and the company will use the investment to expand the product into hospitals.