Prediction of arterial oxygen tension during one-lung ventilation: Analysis of preoperative and intraoperative variables

Objective: To determine whether currently available preoperative and intraoperative variables related to arterial oxygen tension (PaO2) can be used as predictors for low PaO2 during one-lung ventilation (OLV). Design: A prospective cohort study. Setting: Primary university hospital. Participants: Adult patients (n = 92) undergoing thoracic surgery requiring OLV. Interventions: Preoperative and intraoperative data, including past medical history, physical examination, and usual preoperative and intraoperative tests, were collected and used as explanatory variables for PaO2 during OLV by univariate and multivariate analysis. A stepwise logistic regression including the same independent variables was used to identify patients who should be expected to develop arterial hypoxemia (PaO2