Can prolonged expiration manoeuvres improve the prediction of arterial PCO2 from end-tidal PCO2?
B. Tavernier, D. Rey, D. Thevenin, J. P. Triboulet and P. Scherpereel Departement d’Anesthesie Reanimation Chirurgicale II, Hopital Claude Huriez-Chru de Lille, 2, Avenue Oscar Lambret, 59037 Lille Cedex, France; Service de Chirurgie Generale et Endocrinienne, Hopital Claude Huriez-Chru de Lille, 2, Avenue Oscar Lambret, 59037 Lille Cedex, France We have studied, in 16 patients undergoing thoracoabdominal oesophagectomy, if two prolonged expiration manoeuvres improve prediction of arterial PCO2 (PaCO2) from end-tidal PCO2 (PE’ CO2). PE’ CO2, PCO2 at the end of a simple prolonged expiration (PE1 CO2), and PCO2 at the end of a prolonged expiration preceded by sustained hyperinflation of the lungs (PE2 CO2), were measured during laparotomy, in the lateral thoracotomy position during two-lung ventilation, and after transition to one-lung ventilation. (PaCO2-PE’ CO2) was 1.3 (SD 0.4) kPa during laparotomy and this remained stable throughout the study. Both manoeuvres decreased the mean arte
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