01. Why do some people feel suffocated when using an oxygen concentrator for the first time?This is because the body has

With a blue cold wave sweeping across the country, respiratory clinics in major hospitals are overcrowded. The cold air in winter can easily irritate the respiratory system, causing a cold and catching a cold. Severe cases can progress to pneumonia, asthm

Speaking of oxygen, it is an essential element in every body's metabolism. However, patients with respiratory diseases, chronic obstructive pulmonary disease, and other diseases often experience symptoms of hypoxia, leading to difficulty breathing. Oxygen