Medtronic (NYSE:MDT), one of the largest medical-device players on the planet, reported its fourth-quarter earnings today, and investors were clearly pleased with the results. Shares were up 4.9% by the market close, and this stock is up more than 30% over the past 12 months. But which segments drove the company's business in Q4? How did Medtronic's results measure up against its medical-device peers, like Boston Scientific (NYSE:BSX) and St. Jude Medical (NYSE:STJ)? Health-care analyst Max Macaluso discusses these topics in the following video.