Garuti G, Bandiera G, Cattaruzza MS, Gelati L, Osborn JF, Toscani S, Confalonieri M, Lusuardi M.
Monaldi Arch Chest Dis. 2010 Dec;73(4):145-51
Prospective observational study investigating effect of CPAP prior to admission to emergency room, on reduction of endotracheal intubation, in-hospital mortality and length of stay. Results showed that mortality was reduced when helmet CPAP was applied both in the pre-hospital and in-hospital settings. Authors conclude that using CPAP by trained nurses is 'safe, reduces mortality and hospital length of stay'.
Link to abstract.