CPAP at 10 cm H2O during cardiopulmonary bypass does not improve postoperative gas exchange.

Objective: To compare postoperative (PO) pulmonary gas exchange indexes in patients submitted to myocardial revascularization (MR) with or without the application of continuous positive airway pressure (CPAP) during cardiopulmonary bypass (CPB).

Methods: Thirty adult patients submitted to MR with CPB between March and September 2005 were randomly allocated to two groups: CPAP (n=15), patients that received CPAP at 10 cm H2O during CPB, and control (n=15), patients that didn't receive CPAP. PaO(2)/FiO2 and P(A-a)O2 were analyzed at four moments: Pre (just before CPB, with FiO2=1.