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Online ISSN 1827-1596
MECHANICAL VENTILATION IN ANAESTHESIA
Hedenstierna G., Edmark L. *, Aherdan K. K. **
From the Department of Medical Sciences Clinical Physiology University Hospital, Uppsala, Sweden
*Department of Anaesthesia and Intensive Care
**Department of Radiology Central Hospital, Västerås, Sweden
Atelectasis is a frequent finding in paralysed and mechanically ventilated patients. Atelecta-sis, causing shunt, impaires oxygenation and could contribute to postoperative pulmonary complications. Pre-oxygenation used during anaesthesia induction causes atelectasis. A lowering of oxygen fraction from 100% to 80% does not shorten the safety time of apnoea period, particularly useful for a difficult intubation, but it reduces drastically the atelectasis incidence.