Evaluation of Hemodynamic Changes Induced by Alveolar Recruitment Maneuver With Respect to Volemic State in Patients Undergoing Anesthesia for Colon Surgery

During general anesthesia, it's important to maintain normovolemia, since hypovolemia can cause inadequate tissue perfusion and hypervolemia increases the rate of complications, overall mortality and morbidity.

Critically ill patients commonly present with important hypotension that, in the majority of cases, is promptly treated with intravenous fluids to reverse organ hypoperfusion.

However, previous studies have demonstrated that only 50% of hemodynamically unstable patients are responsive to fluid administration.

In the last decade, attention has been focused on finding a parameter capable of assessing fluid responsiveness in a hypotensive patient.

Recent articles have demonstrated that standard monitoring parameters have no significance for this purpose, while hemodynamic parameters, like stroke volume variation (SVV) or pulse pressure variation (PVV) may have an important role.