Oxygen: risks as well as benefits
Oxygen administration is the most commonly used therapy in emergency medicine. It is given to 18,000 patients in the United Kingdom every day, and 14% of patients in hospital receive it at some time during their stay. Whilst some of this activity is helpful, or indeed lifesaving, in some patients, oxygen can lead to harm, or even death. The domiciliary use of oxygen is also an area in which there is the potential for both waste and harm. When appropriately used, it prolongs life and provides valuable symptom relief; yet, in up to 43% of the cases, such therapy was either not used by patients as directed or provided no clinical benefit. At an annual cost in excess of £110 million, this is a lot of waste. This chapter examines the use of oxygen in both the acute setting and the assessment for home oxygen, with a focus on the pathophysiology behind oxygen therapy and the potential dangers.