The Estimation of Abdominal Pressure by the Bladder and Gastric Pressure

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.

In critically ill patients, we will measure the gastric pressure by a gastric balloon and the bladder pressure by the intra-vesical pressure to find the optimal method to estimate the abdominal pressure.

Inclusion Criteria:

• Critically ill patients during invasive mechanical ventilation

Exclusion Criteria:

• Contraindication to measure the bladder pressure