MANSFIELD, Mass.--(BUSINESS WIRE)--Covidien (NYSE:COV), a leading global provider of healthcare products, today announced that the tender offer for all of the Aspect Medical Systems, Inc. (“Aspect”) outstanding 2.50% Convertible Senior Notes Due 2014 (the “Notes”) expired at 12:00 midnight ET, at the end of December 11, 2009, and was not extended. Aspect became a wholly owned subsidiary of Covidien on November 6, 2009. Aspect has accepted for payment and will purchase all Notes tendered in the tender offer.