A resuscitator's a device using positive pressure to inflate the lungs of an unconscious person who's not breathing, in order to keep him oxygenated and alive. There're three basic types: a manual version (also known as a bag valve mask) consisting of a mask and a large hand-squeezed plastic bulb using ambient air, or with supplemental oxygen from a high-pressure tank. The second type's a pulmonary or breath powered resuscitator. The first po the second type was the White Pulmonay Resuscitator o… (More on Resuscitator)