Relevance study on positive end expiratory pressure and central venous pressure during mechanical ventilation

Objective To study the relevance of positive end expiratory pressure and central venous pressure during mechanical ventilation.Method Choose 47 patients undergoing mechanical ventilation in ICU and monitoring their central venous pressure.Observe the change of central venous pressure at PEEP 0,3,6,9,12and 15 cmH2O(1 cmH2O=0.098 kPa) by self-comparison.Analyze the data by covariance,correlation and regression analysis and present it by average + deviation(±s).Result Central venous pressure increases as PEEP level rise.Covariance analysis indicates that the tested CVP value can be seen as the real CVP value when PEEP≤3 cmH2O.The linear regression equation Y=10.9143+0.1581X can be got when taking PEEP as independent variable X and CVP as dependent variable Y.Conclusion There is positive correlation between positive end-expiratory pressure and central venous pressure.Positive end expiratory pressure will affect the accuracy of monitoring central venous pressure.