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Respiratory mechanics during and after anaesthesia for major vascular surgery

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To evaluate the effects of major vascular surgery on respiratory mechanics, 11 patients undergoing general anaesthesia for abdominal aortic surgery were studied. Before aortic cross-clamping, chest wall elastance and resistance both increased (by 126% and 58%, respectively) when surgical retractors were placed. After aortic cross-clamping, lung elastance increased by 29%, accompanied by a decrease in cardiac index (22%) and an increase in pulmonary (17%) and systemic (15%) vascular resistance. After aortic unclamping, lung elastance decreased, although it remained higher than baseline values (by 12%). All cardiovascular variables returned to the values obtained before aortic cross-clamping.
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Keywords: Lung; Surgery; respiratory resistance, elastance; vascular

Document Type: Research Article

Affiliations: 1: Assistant Professor 2: Staff Intensivist 3: Associate Professor 4: Professor of Anaesthesia and Intensive Care Medicine, Department of Biomedical Science and Advanced Therapy, Section of Anaesthesia and Intensive Care, S. Anna Hospital, University of Ferrara, Corso Giovecca n.203, 44100 Ferrara, Italy

Publication date: November 1, 1999

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