Preliminary Market Consultation For The Verification Of Non-Fungibility/Exclusivity Preparatory To The Assignment Of The Urgent Supply Through Rental For A Period Of 60 Months Of Two Heat Exchangers For Extracorporeal Circulation And Purchase Of The Related Consumables Needed By The Operating Room Of The Complex Cardiac Surgery Facility Of The P.O. Of Mantua With Negotiated Procedure Without Publication Of A Notice (Ex Art. 76 Legislative Decree 36/2023)