What is the composition of medical air?

The correct composition of medical air is characterized by its typical atmospheric makeup, which consists of approximately 78% nitrogen, 20.95% oxygen, and about 1% of other gases, such as argon and carbon dioxide. This composition is crucial for medical air, particularly because it mimics the natural air that humans breathe.

Understanding the composition is important for several reasons: medical air is used in various clinical applications, including providing ventilation support through anesthesia machines and respiratory equipment. The nitrogen component ensures that the air being administered does not alter the patient's oxygen levels dramatically while delivering essential oxygen to their systems.

Other options reflect incorrect compositions. For instance, 100% oxygen would be unsuitable for many situations as it can lead to oxygen toxicity if used inappropriately. A 50% oxygen and 50% nitrogen mixture does not reflect the standard composition of air and would not be adequate for patients who require air rather than pure oxygen. Finally, a mixture of 21% oxygen and 79% carbon dioxide does not represent the proper air composition and would be detrimental to a patient’s respiratory needs, as carbon dioxide accumulation is harmful. Therefore, the choice of 78% nitrogen, 20.95% oxygen, and 1% other