Earnings season has revealed surprises, excitement, and disappointment through the past few weeks. Many of health care's biggest names still have yet to report quarterly data, but a number of the sector's top companies have done so -- and have revealed some key storylines to watch.

From Abbott Labs' (NYSE:ABT) thriving nutritionals division to intensifying worries around a big robotic surgical maker, Motley Fool contributor Dan Carroll takes you through three of the top earnings reports from the health-care sector so far and reveals what you'll need to look out for from these companies going forward.

Fool contributor Dan Carroll has no position in any stocks mentioned. 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.