A review of patient safety incidents reported as 'severe' or 'death' from critical care units in England and Wales between 2004 and 2014.

We analysed 1743 patient safety incidents reported between 2004 and 2014 from critical care units in England and Wales where the harm had been classified as 'severe' (1346, 77%) or 'death' (397, 23%). We classified 593 (34%) of these incidents as resulting in temporary harm, and 782 (45%) as more than temporary harm, of which 389 (22%) may have contributed to the patient's death. We found no described harm in 368 (21%) incidents. We classified 1555 (89%) of the incidents as being avoidable or potentially avoidable. There were changes over time for some incident types (pressure sores: 10 incidents in 2007, 64 in 2012; infections: 60 incidents in 2007, 10 in 2012) and some changes in response to national guidance. We made a comparison with a dataset of all incidents reported from units in North-West England, and this confirmed that the search strategy identified more severe incidents, but did not identify all incidents that contributed to mortality.