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Procedural sedation of elderly patients by emergency physicians: a safety analysis of 740 patients.

BACKGROUND: The elderly are perceived as a high-risk group for procedural sedation. Concern exists regarding the safety of sedation of this patient group by emergency physicians, particularly when using propofol.

METHODS: We analysed prospectively collected data on patients aged 75 yr or older undergoing sedation between October 2006 and March 2017 in the emergency department of a single centre. We used the World Society of Intravenous Anaesthesia International Sedation Task Force adverse event tool, stratifying identified adverse events according to consensus agreement.

RESULTS: Of 740 consecutive patients (median age 84 yr), 571 patients received propofol, 142 morphine and midazolam, and 27 other agents. We identified 19 sentinel events: 2 cases of hypoxia, 10 of apnoea (without hypoxaemia), 5 of hypotension, and 2 of both hypoxaemia and hypotension. We also identified 30 moderate, 41 minor, and 7 minimal risk adverse events. There were no adverse outcomes.

CONCLUSIONS: We observed safe sedation practice in this high-risk group of patients in this department. A sentinel adverse event rate of 2.6% including a hypoxaemia rate of 0.5%, with no adverse outcomes sets a benchmark for elderly sedation. We recommend quality pre-oxygenation, an initial propofol bolus of no more than 0.5 mg kg-1 , and a robust training and governance framework.

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