Inspiratory support with face mask in acute non-hypercapnic respiratory failure.

This prospective study assessed, in 10 conscious patients without a history of chronic respiratory disease, the feasibility of mechanical pressure support ventilation with PEEP by face mask for the treatment of acute respiratory failure without hypercapnia. Pressure support level was determined to obtain a VT of 5 to 10 mL . kg(-1) and a decrease of respiratory rate of more than 20%. FlO(2) and PEEP levels were determined to obtain a SpO(2) > 92% and a PaO2 > 70 mmHg. The efficiency of the technique was assessed through the time course of respiratory rate, PaO2, PaCO2 and SaO(2). The technique was efficient in all patients and tracheal intubation was not required. During face mask ventilation, a significant decrease in respiratory rate and an increase in PaO2 and SaO(2) were observed. Pressure support ventilation with PEEP by face mask is an efficient technique for the treatment of acute non hypercapnic respiratory failure in conscious and cooperative patients.