Evaluation of Ventilatory Strategies During Laparoscopic Surgery

Re-expansion of Atelectasis During Laparoscopic Surgery. Recruitment Maneuver vs Positive End-expiratory Pressure: a Randomized Study

Atelectasis involving declive areas often occurs during general anesthesia and may persist postoperatively. This phenomenon could be amplified by pneumoperitoneum and Trendelenburg position. Hypothesis: To evaluate whether the shape of the airway pressure-time curve, Stress Index (SI), during constant flow inflation can lead ventilator setting during general anesthesia.

Inclusion Criteria:

• American Society Anesthesiology (ASA) I, II;
• age > 18 years;
• elective surgery

Exclusion Criteria:

• ASA III, IV;
• Age < 18 years;
• emergency surgery