MINNEAPOLIS - Medical device maker Medtronic Inc. said Monday it has commenced a global study comparing the company's Endeavor drug-eluting stent against Abbott Laboratory's competing Xience V drug-eluting stent.
The first patients were implanted with the device in Europe over the last two weeks.
The trial, called RESOLUTE III, will enroll a total of 2,300 patients.
Although the Endeavor stent won European regulatory approval in October, the coronary stent has yet to be approved in the U.S. Stents are tiny, mesh-wire tubes that prop open arteries after they have been surgically cleared of fatty plaque.
Shares of Medtronic rose 11 cents to $47.90 in morning trading.

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