 Shares of Medtronic PLC MDT, 1.22 dropped 2.4 in premarket trading Tuesday, after the medical devices maker reported fiscal second-quarter profit that topped expectations but revenue that missed and provided a downbeat full-year outlook, citing weakness in procedure volumes in certain businesses and the pricing impact of procurement in China. Net income for the quarter to Oct. 28 fell to 427 million, or 32 cents a share, from 1.31 billion, or 97 cents a share, in the year-ago period. 