Intuitive Surgical (NASDAQ:ISRG)-- maker of the daVinci Robotic Surgical System -- and its investors have experienced quite the roller coaster over the past year.  From medical professionals publicly questioning the necessity of robot-assisted surgery, to hospitals tightening up their budgets with the onset of the Affordable Care Act, the company hasn't been able to catch a break.

For a while, it looked like fortunes had swung back in the company's favor. In mid-January, Intuitive came out with preliminary earnings that were more upbeat than expected, and shares jumped almost 10%. But when the full report was issued a few weeks later, the stock's dive continued.

So, what gives? In the video below, Motley Fool contributor Brian Stoffel fills you in on two key details that raised red flags for investors, and what they might mean for the company moving forward.

Brian Stoffel owns shares of Intuitive Surgical. The Motley Fool recommends Intuitive Surgical. The Motley Fool owns shares of Intuitive Surgical. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.