During air-medical transport of acutely-ill patients, 1 in 20 experience a critical event such as death, major resuscitation, or blood pressure deterioration according to a new study http://www.cmaj.ca/press/cmaj080886.pdf in CMAJ (Canadian Medical Association Journal).
The study looked at 19,228 transported adult patients in Ontario, Canada, and sought to identify factors that are associated with in-transit adverse events.