Emergency oxygen use

Is too much oxygen a good thing? Christine Roffe, consultant physician, Stoke Stroke Research Group, North Staffordshire Combined Healthcare NHS Trust, talks Mabel Chew, BMJ associate editor, through the evidence for routinely treating stroke patients with oxygen. And Russell Gruen, professor of surgery and public health, Alfred and Monash University, Melbourne, explains how and when tranexamic acid should be used after trauma.