Types of Gas Used in Medical Gas Systems in Hospitals. 1  Medical gas systems in hospitals are, in a word, lifesaving. These assemblies supply piped oxygen, nitrous oxide, nitrogen, carbon dioxide, and medical air to hospital areas such as patient rooms, recovery areas, operating rooms, and more.
The definition of a saline is a salt source. An example of a saline is a salt lick used by horses and cows. of, characteristic of, or containing common salt, or sodium chloride.
But in medicine, rather than chemistry, normal saline is a mixture of about 10% salt in water. It is called normal because it is the approximation of the the body's normal intracelllular fluid. Half normal would be half as much salt, or about 4.9%.