Shares of Intuitive Surgical Inc. ISRG, -0.25% fell more than 4% in the extended session Thursday after the health care company reported fourth-quarter earnings and sales slightly above expectations but said the pandemic continues to lead to fewer procedures done with its main robotic surgical system. Intuitive said it earned $381 million, or $1.04 a share, in the quarter, compared with $365 million, or $1.01 a share, in the fourth quarter of 2020.