ST. LOUIS--(BUSINESS WIRE)--Covidien Ltd. (NYSE: COV, BSX: COV) today announced the availability of several enhancements for its MRidium™ MRI Infusion System, which is the industry’s first and only non-magnetic IV infusion pump. Specifically designed to address the challenges of the magnetic resonance imaging (MRI) suite, the pump now has additional features that help operators administer intravenous medication more efficiently.