Positive pressure ventilation has been used for hundreds of
years since Vesalius demonstrated its benefit in dying animals in 1543.
Mechanical ventilation (MV) may be employed to improve pulmonary gas
exchange, to relieve respiratory muscle fatigue, to allow lung and
airway healing, and to avoid complications. Nonetheless, complications
associated with MV were described as far back as 1827 when Leroy
observed that pneumothorax could result from overaggressive bellows