Most people think of the medical gas system as oxygen that is pumped to patients in surgery or in their hospital room. In fact, there are several gases that make up the average medical gas system including the anesthesia gases that are part of the cart in the operating room. Medical gas systems sustain life and are regulated as a drug. This means multiple layers of restrictions and instruction on the proper, safe and legal way to do things.http://www.cangas-systemss.com/medical-gas-system-1-1