Fluid expansion during cardiocirculatory insufficiency was helped by cardiac output monitoring. However, the goal of fluid expansion was to increase the oxygen delivery, which consider cardiac output, but also Haemoglobin which decrease during a fluid challenge. The maximalization of cardiac output could decrease the oxygen delivery if the haemodilution was too wide. The aim of this study was to describe the oxygen delivery during a fluid expansion conducted for cardiac output maximalization, following actual guidelines.

One group of 20 anticipated patients

Inclusion Criteria:

• Adults over 18 years
• Patients in intensive care after cardiac surgery under mechanically ventilation and with oesophageal Doppler

Exclusion Criteria:

• Arrythmia
• Pregnancy or childrens
• Patients without cardiac output monitoring with oesophageal Doppler
• Patients without medical indication for fluid expansion
• Urgency surgery

Mechanically ventilated patients after elective cardiac surgery with oesophageal Doppler for cardiac output monitoring and arterial and venous central line