... experience in weighing the advantages and the disadvantages of every option. The haemodynamic effectsassociated with auto-PEEP are well known, and the clinicianshould be aware of them and monitor them. ... of Anesthesia and Intensive Care, Institute of Anesthesia and Intensive Care Unit, Department of Surgical Science and Intensive Care, Milano-Bicocca University, Milan, ItalyCorrespondence: Antonio ... and in the ratio of inspiratory to expiratory time may have a negative impact onoxygenation, which may not be acceptable. On the otherhand, we may tolerate auto-PEEP and try to limit the haemodynamic...