Different Modes of Ventilation During Cardiopulmonary Bypass

Comparative Study Between Different Modes of Ventilation During Cardiopulmonary Bypass and Its Effect on Postoperative Pulmonary Dysfunction

66 patients divided into 3 groups with different modes of ventilation.

Sixty-six patients going through open-heart surgeries were included in the study, divided into 3 groups (P: pressure controlled ventilation, V: volume controlled ventilation, C: control) in accordance with the mode of ventilation. Patients studied for chest x-ray, lung ultrasound, arterial oxygen partial pressure to fractional inspired oxygen ratio (PaO2/FiO2), Alveolar-arterial oxygen gradient, static lung compliance and dynamic lung compliance, taken after induction of anesthesia, 1h post cardiopulmonary bypass, 1h after arrival to cardiac surgical unit.

Inclusion Criteria:

• Patients undergoingvalve surgeries
• Patients undergoing coronary artery bypass grafting surgeries

Exclusion Criteria:

• Emergency cases.
• Off-pump surgeries.
• Patients with chronic lung diseases with forced expiratory volume in first second (FEV1) or forced vital capacity (FVC) less than 40% of the predicted value.
• Massive blood transfusion during surgery.
• Complicated surgeries.
• Redo surgeries.
• Patients with decompensated heart failure prior to surgery.
• Patients refusal