Watch any medical drama, or visit any emergency department, and there's one thing that seems to be a universal source of respite - oxygen.
But what if that steady stream of oxygen is actually doing more harm than good? A ground-breaking study by New Zealand researchers has found that too much oxygen increases the risk of death in patients.
And the study's discovered the more oxygen given, the higher the risk of death.
Co-author of the study, Dr Paul Young from the Medical Research Institute of New Zealand, tells us more.