http://dx.doi.org/10.1590/S1806-37132014000500002 hospitalization for patients with respiratory failure and requiring mechanical ventilation is estimated to be US$34,000, allow us to extrapolate that Brazil will spend nearly R$54.5 billion/year, considering 12% of healthcare expenditures(8) and 1.1% of the gross domestic product,9) on hospital treatment of patients with acute respiratory failur...