Which oxygen delivery system uses a simple mask?

The use of a simple mask in oxygen delivery systems is characteristic of a reservoir system. This type of system typically consists of a facial mask that allows the patient to receive a higher concentration of oxygen than a low-flow system. The simple mask is designed to cover the nose and mouth, capturing exhaled air and ensuring that the patient inhales a mixture that comprises ambient air and concentrated oxygen supplied from a tank.

In a reservoir system, the mask is equipped with a reservoir bag, which collects oxygen and allows it to be delivered to the patient during inhalation. This setup is essential for patients who need higher oxygen concentrations and cannot maintain effective breathing with low-flow devices, like nasal cannulas or simple masks without a reservoir.

While high-flow systems deliver a fixed amount of oxygen via specialized devices like venturi masks and hybrid systems combine multiple delivery methods, they do not typically utilize simple masks in their configurations. Additionally, low-flow systems, like nasal cannulas, provide less oxygen than a reservoir mask and depend on the patient’s breathing effort. Therefore, the reservoir system’s design and oxygen concentration delivery make it the correct answer for the specific question regarding the use of a simple mask.