In reply: We performed a retrospective audit as part of a quality improvement program following a number of serious adverse events in various areas of our hospital. Our article showed that carbon dioxide retention in acute exacerbation of chronic obstructive pulmonary disease (AECOPD) is common (41 of 65 patients admitted with chronic obstructive pulmonary disease [COPD] over 4 months), and that guidelines on blood gas measurement and oxygen use were not being followed.
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- Department of Respiratory Medicine, Royal Melbourne Hospital, Melbourne, VIC.