Which gas is used to power drills and saws?
a. Oxygen
b. Carbon monoxide
c. Nitrogen
d. Medical air
ANS: C
Nitrogen is used in the OR to power tools such as power drills and saws. Nitrous oxide, nitrogen, carbon dioxide, medical air, and oxygen are the main gases found in the OR. Nitrous oxide, oxygen, and medical air are administered to the patient in a drug-related form via the respiratory tree. Carbon dioxide is used to create a working space during endoscopic procedures.
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