Noninvasive Ventilation After Coronary Bypass Grafting (Physiotherapy)

This is a prospective, quantitative, randomized, crossover study. Were included in this study 10 people in the Intensive Care Unit at University Hospital in Uberlandia, on the first day of the postoperative coronary artery bypass graft (CABG). For data collection was performed randomization on the block (2: 4), to determine the first technique to be used and then a wash-out period of one hour was allowed for the research subject reaches the systemic arterial pressure, heart rate, respiratory rate and oxygen saturation baseline. And after, for cross-over, the second technique was performed. Non-invasive ventilation was performed for 30 minutes each ventilator. All subjects underwent noninvasive ventilation using two models of ventilators, they are conventional (designed for invasive ventilation but is also used in non-invasive ventilation mode) and specific (designed for non-invasive ventilation). Hemodynamic, autonomic and respiratory variables are monitored. We use the hypothesis that non-invasive ventilation performed with two fan models can alter autonomic function and that there is hemodynamic changes related to autonomic function in different ventilators in postoperative coronary artery bypass grafting.