[Industry News] How does an oxygen mask work? Many patients with chronic lung diseases such as chronic obstructive pulmonary disease (COPD), emphysema, and pulmonary fibrosis have low blood oxygen levels. Usually, their doctor will prescribe oxygen therapy. Oxygen therapy helps people raise their blood oxygen levels and maintain better blood oxygen levels. If you use oxygen therapy, it is important to keep your oxygen equipment clean and practice safe use. Oxygen masks are a critical part of the equipment. The following article shall tell you more about this particular oxygen mask.