What is the flow rate range for a simple mask delivering oxygen?

A simple oxygen mask typically operates effectively within a flow rate range of 6 to 10 litres per minute. At this flow rate, the mask can deliver a reasonable concentration of oxygen, usually around 40% to 60%, depending on several factors including the fit of the mask on the patient's face and their breathing patterns.

When the flow rate is set within the specified range, it ensures that there is sufficient oxygen available for inhalation while also allowing for some room air to mix in, which is vital for patients who may not require high-flow oxygen therapy. This is important for a variety of respiratory patients who are stable but need supplemental oxygen without the intensity of a high-flow system.

In contrast, lower flow rates might not provide adequate oxygen concentrations for the patient, while excessively high flow rates may lead to inefficient oxygen delivery and discomfort. Therefore, the given range of 6 to 10 litres per minute is optimal for ensuring effective oxygen delivery with a simple mask.