Supplemental oxygen is among the most widely prescribed therapies in the world, with an estimated 13 to 20 million patients worldwide requiring oxygen delivery by mechanical ventilation each year. Mechanical ventilation—a form of life support—is a technology that moves breathable air into and out of the lungs, acting like a bellows. Ventilators have moved far beyond the “iron lung” machines some people might picture; now, apparatuses have progressed to sophisticated, compact digital machines that deliver oxygen through a small plastic tube that goes down the throat.
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