Background: The clinical effects of a pre-fixed flow of air-oxygen versus a flow titrated according to visible bubbling are not well understood. Objective: To compare the effects of a fixed flow (5 L/min) and titrated flow ( flow just enough to ensure bubbling ) at different set pressures on delivered intra-prong pressure. gas exchange and clinical parameters in preterm infants on bub... https://www.parisnaturalfoodes.shop/product-category/canadian-bitters/