Masip J, Roque M, Sánchez B, Fernández R, Subirana M, Expósito JA. JAMA. 2005 Dec 28;294(24):3124-30
Meta-analysis of 15 relevant randomised controlled trials and systematic reviews comparing NIV to conventional oxygen therapy in patients with acute pulmonary edema. Authors conclude that NIV 'reduces the need for intubation and mortality' in this scenario.
Link to abstract.
Squadrone V, Coha M, Cerutti E, Schellino MM, Biolino P, Occella P, Belloni G, Vilianis G, Fiore G, Cavallo F, Ranieri VM. JAMA. 2005 Feb 2;293(5):589-95
Randomised, controlled, unblinded study on 209 patients randomyl assigned to receive oxygen or oxygen plus CPAP via helmet. Primary end point was incidence of endotracheal intubation. Authors conclude that CPAP via helmet 'may decrease the incidence of endotracheal intubation' in this scenario.
Link to abstract.