What is a common method for producing medical air in hospitals?

Producing medical air in hospitals typically involves the compression of atmospheric air. This process works by taking in the ambient air from the environment, which is composed of approximately 78% nitrogen and 21% oxygen, along with small amounts of other gases. The atmospheric air is then compressed to remove moisture and contaminants, ensuring that it meets the necessary quality standards for medical use.

Compressed air can be efficiently stored and delivered through a network of pipes, allowing it to be readily available for various medical applications, such as powering ventilators and anesthesia machines, or providing respiratory therapy. This method is widely used in hospitals because it is cost-effective and allows for continuous and reliable supply of medical air without the need for large storage tanks.

In contrast, other methods mentioned, such as the combination of various gases in a tank, separation using high-pressure systems, or liquid nitrogen infusion are either not standard practices for producing medical air or apply to different gases used in medical settings, highlighting the specific role that compressed atmospheric air plays in healthcare facilities.