[The relationships between oxygenation index and prognosis in acute respiratory failure patients treated by invasive mechanical ventilation].

Objective: To investigate the effect of oxygenation index (PaO(2)/FiO(2)) on patients' prognosis through comparative analyzing the monitoring indicators of acute respiratory failure patients treated by invasive mechanical ventilation.

Methods: Data from 91 acute respiratory failure patients treated by invasive mechanical ventilation in respiration intensive care unit (ICU) of the General Hospital of PLA of Lanzhou from November 2006 to August 2011 were retrospectively analyzed. Patients were divided into survival group (n=55) and death group (n=36) by the outcome, the critical severity scores of the diseases and changes in blood gas analysis during ventilation were compared, and their correlation with prognosis were analyzed.