The patient will be asked “Are you using oxygen, and if so, for how long?”, and will be provided with several options to answer this. They will also be asked “Do your ankles get swollen during the day?”, which they can answer yes or no to. Lastly, they will be asked for their ‘Oxygen saturation’ readings.

There is a video which the patient can watch, explaining to them how to measure their oxygen saturations. 

Oximeter – “How to Use” video.