Final answer:
The oxygen concentration delivered by a non-rebreathing mask with a flow rate of 10-12 liters/min is approximately 80-90%. These masks include a reservoir and one-way valves to ensure a high concentration of oxygen is delivered to the patient.
Step-by-step explanation:
The oxygen concentration delivered by a non-rebreathing mask with a flow rate of 10-12 liters/min is approximately 80-90%. Non-rebreathing masks are designed to allow patients to inhale pure oxygen without re-inhaling exhaled gases. The oxygen provided to the patient is at a high concentration because the mask includes a reservoir bag that captures and stores a supply of oxygen, as well as a series of one-way valves that prevent exhalation and room air from entering the mask and diluting the oxygen concentration. With a proper fit and functioning valves, and flow rate of 10-12 liters/min, the mask can deliver an oxygen concentration of up to 80-90% to the patient.
Alveolar ventilation plays a critical role in maintaining adequate oxygen levels and preventing carbon dioxide buildup in the body. When under situations such as mountain climbing or dealing with certain health conditions, the need for supplemental oxygen, like that provided by a non-rebreathing mask, may become necessary.