[Increase in functional residual capacity induced by positive end-expiratory pressure. Prediction using the thoracopulmonary pressure curve].
Prediction of FRC using a respiratory P-V curve (2 1 syringe method) has been tested in eight patients with normal lungs and in 12 ARDS patients. FRC was measured using nitrogen dilution technique with a closed circuit. Correlation between measured and predicted FRC was excellent, especially when the expiratory limb of the P-V curve was used (r = 0.92, in patients with pulmonary edema, and r = 0,97 when patients were evaluated after a few weeks). PEEP induced increase in FRC was larger between 10 and 20 cmH2O than between 0 and 10 cmH2O. As expected, Qs/Qt decrease was correlated with the FRC augmentation.
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D005652:Functional Residual Capacity; D006801:Humans; D008176:Lung Volume Measurements; D008297:Male; D008875:Middle Aged; D011175:Positive-Pressure Respiration; D012128:Respiratory Distress Syndrome / Q000503:physiopathology; D014109:Total Lung Capacity
Augmentation de la capacité résiduelle fonctionnelle induite par la ventilation en pression positive expiratoire. Prédiction par la courbe pression-volume thoracopulmonaire.