What is the standard for medical oxygen concentrator?

The medical oxygen concentrator must be a 3-liter machine. When the new machine leaves the factory, the oxygen concentration must be greater than or equal to 90%. After use, when the oxygen concentration is lower than 82%, the molecular sieve must be replaced. In addition, the country requires medical oxygen concentrators to have two functions: oxygen concentration indication and fault indication alarm, to remind users.

So, why does the oxygen concentration of an oxygen concentrator need to reach 93% to be considered qualified? This is because when using a medical oxygen concentrator for oxygen inhalation, it also inhales air containing 20.98% oxygen purity, which dilutes the actual oxygen concentration inhaled. According to tests, the concentration of oxygen inhaled into the throat is generally around 45%. According to the structural characteristics of the human body, inhaling oxygen undergoes a 32 level attenuation process. In fact, at a concentration of 93% oxygen, the concentration of oxygen utilized by the human body after inhaling oxygen is only about 30%. Therefore, in order to ensure that patients can receive oxygen assisted treatment normally, the oxygen concentration must reach 93% or equal to 93% to meet the patient's oxygen needs.

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