A small Italian company has used 3D printing technology to quickly produce oxygen valves to treat some coronavirus patients. Italy has been battling the world’s largest number of cases of the new coronavirus outside of China. Cristian Fracassi founded and heads the Italian start up company Isinnova. He told the Reuters news agency that he heard about a shortage of the valves at a hospital near the northern city of Brescia. The area has had an explosion of coronavirus cases. The devices are called Venturi valves. They are named after 18th century Italian physicist Giovanni Battista. The devices are used to connect patient masks to oxygen equipment.