** Shares of medical device maker Procept BioRobotics PRCT.O rise 2.3% to $57 premarket

** Company raises its annual revenue forecast to $323 million, compared with previous forecast of $320 million and analysts' estimates of $321.96 million, according to data compiled by LSEG

** Company reports Q1 revenue of $69.2 million, up 55% year-over-year, beating analysts' estimates of $65.7 million

** PRCT posts Q1 loss of 45 cents per share, smaller than expectations of 49 cents per share

** As of last close, PRCT has fallen 30.8% YTD

(Reporting by Siddhi Mahatole)

((siddhi.mahatole@thomsonreuters.com))