** Medical device maker GE Healthcare GEHC.O up 1.1% at $77.50 premarket
** GEHC is exploring options including the sale of stake in its China unit, Bloomberg News reports, citing people familiar with the matter
** Company did not immediately respond to a Reuters request for comment
** A potential transaction may value the China assets at several billion dollars, the report says
** Up to last close, stock down 1.98% YTD