** Teleflex TFX.N shares rise 13% to $133.70 premarket
** Private equity firms CVC Capital Partners and GTCR yesterday submitted a joint bid to take the medical device maker private, a source says
** TFX makes breathing tubes, catheters and vascular access products used mainly in hospital intensive care units
** Source adds that bid under evaluation; no deal certain and TFX can reject approach or draw rival interest
** Co has been reshaping business, selling three units for $2.03 billion in December to sharpen focus
** Stock ended regular trade down 5.5% at $124.75 earlier in session
** As of last close, stock up ~2% YTD
(Reporting by Joyjeet Das)
((Joyjeet.Das@thomsonreuters.com;))