Open access. Pressure injuries are problematic to health systems throughout the world, significantly harming over 7 million patients and adding extraordinary costs. The USA, for instance, experiences more than 2.5 million pressure injury cases per year which cause over 60 000 deaths—that is more than car accident fatalities in the USA—and cost the health system at least $9–$11 billion.1 The UK is no less affected by 700 000 cases per year that result in 27 000 deaths and cost the National Health Service (NHS) an estimated £1.4–£2.1 billion.2