What is the main goal of using a simple face mask in oxygen therapy?

The primary objective of using a simple face mask in oxygen therapy is to deliver a moderate concentration of oxygen. This type of mask is designed to cover the nose and mouth, allowing for a comfortable and effective means of administering oxygen to patients who require supplemental support.

When placed on the patient's face, the mask can deliver oxygen concentrations ranging from approximately 35% to 50%, which is beneficial for patients with conditions that necessitate more oxygen than what is available in ambient air. The design of the mask allows for some exhaled air to escape, which helps to prevent carbon dioxide buildup and maintains a reasonable level of oxygen delivery.

The other options do not accurately represent the function of a simple face mask. While it is true that the mask can provide comfort during use, that is not its primary goal; instead, it focuses on delivering a satisfactory level of oxygen. The mask is not intended for delivering high concentrations of oxygen, which would require a different device, such as a non-rebreather mask. Additionally, it is not primarily designed to provide minimal support for breathing, as its main purpose is to ensure adequate oxygenation for patients who are unable to maintain sufficient oxygen levels on their own.