The complacency could be predictive of TDGE in postoperative cardiac surgery: Croos sectional study?

Introduction: Cardiac surgery postoperative respiratory complications (PO) may be related to the use of cardiopulmonary bypass (CPB) and trigger changes in respiratory function such as decreased compliance and the development of transient dysfunction of gas exchange(TDGE). Objective: To correlate pulmonary complacency in the PO with TDGE, pulmonary resistance, mechanical ventilation (MV) weaning failure and the need to use noninvasive mechanical ventilation (NIV). Method: Prospective, observational study in patients in the PO of cardiac surgery using CPB. Two groups were analyzed and correlated. Group A, including patients with pulmonary compliance less than 60 ml/cmH2O and group B with a compliance greater than 60ml/cmH2O. Results: Eighty one patients were selected. There was no statistical difference between groups A (N = 58) and B (N = 23) for Apache II, Euroescore, Sofa, CPB and MV time. Patients in group A presented worse values in relation to the oxygenation index (168 mmHg[176.6-228.9] versus 247 mmHg[195.2-357.8], p = 0.02), pulmonary resistance 10 cmH2O/L/sec [10,3-11,7] versus 8 cmH2O/L/sec [4,5-8,8], p?<0,01), and use of NIV (32.75% versus zero, p = 0.02). There was a tendency for greater weaning failure of MV in patients in group A (22.4% versus zero, p = 0.06). Conclusion: Pulmonary compliance could be considered a risk factor for moderate TDGE.