Clinical Research Directory

Ventilation Mode and Atelectasis After Prone-Position Surgery: A Lung Ultrasound Study

Sponsor: Prof. Dr. Cemil Tascıoglu Education and Research Hospital Organization

Summary

This prospective single-centre observational study compared two intraoperative mechanical ventilation modes, volume-controlled ventilation (VCV) and volume-guaranteed pressure-controlled ventilation (VG-PCV), in adults undergoing elective surgery in the prone position. The ventilation mode was selected by the attending anaesthesiologist as part of routine clinical care; the investigators did not assign it. Perioperative atelectasis was assessed using a modified bilateral 12-zone lung ultrasound score obtained before induction of anaesthesia and after extubation, and oxygenation was assessed using the alveolar-arterial oxygen gradient calculated from an intraoperative arterial blood gas sample. The study also examined whether the effect of ventilation mode on atelectasis differed according to obesity.

Official title: Volume-Controlled Versus Volume-Guaranteed Pressure-Controlled Ventilation and Perioperative Atelectasis Assessed by a Modified Lung Ultrasound Score and the Alveolar-Arterial Oxygen Gradient in Adults Undergoing Prone-Position Surgery: A Prospective Single-Centre Observational Study

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