The Specific Elastance in Acute Lung Injury/Acute Respiratory Distress Syndrome (ALI/ARDS) Patients The investigators aim to study the specific elastance in ALI/ARDS patients during invasive mechanical ventilation.

• Country Italy
• organs None
• Specialty None

The Estimation of Abdominal Pressure by the Bladder and Gastric Pressure The investigators aim to compare the bladder pressure to the gastric pressure in critically ill patients.

• Country Italy
• organs None
• Specialty None