 Shares of Intuitive Surgical Inc. ISRG dropped more than 10 in the extended session Tuesday after the maker of surgical robotic systems reported fourth-quarter results slightly below Wall Street expectations and said it placed fewer of its devices during the quarter. Intuitive earned 325 million, or 91 cents a share, compared with 381 million, or 1.04 a share, in the fourth quarter of 2021. 