Pressure Controlled Ventilation Versus Volume Controlled Ventilation in Upper Abdominal Surgery

Comparison of Pressure and Volume Controlled Ventilation in Terms of Mechanical Power in Upper Abdominal Surgery

Comparison of mechanical powers produced at volume controlled and pressure controlled mechanical ventilation

The mechanical power created by mechanical ventilation, as a new concept, can enable to evaluate the effect of different components in the lung.Our aim in this study is to calculate mechanical power in different ventilation modes ( pressure controlled and volume controlled ventilation) and to compare them. To calculate the mechanical powers we will use Van der Meijden's mechanical power formula for pressure controlled ventilation and for volume controlled ventilation we will use Gattinoni's mechanical power formula. In the literature we haven't seen any publication comparing the mechanical power of two commonly used ventilation modes (volume controlled and pressure controlled ventilation)

Inclusion Criteria:

• ASA1-2 , >18 years old patients having upper abdominal surgery

Exclusion Criteria:

• chronic obstructive lung disease, interstitial lung disease
• chronic renal failure
• Child-Pugh > 6 liver disease
• Patients who don't give consent
• NYHA > 2 heart failure