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What Is an Iron Lung?
No device is more associated with polio than the tank respirator, better known as the iron lung. Physicians who treated people in the acute, early stage of polio saw that many patients were unable to breathe when the virus’s action paralyzed muscle groups in the chest. Death was frequent at this stage, but those who survived usually recovered much or almost all of their former strength.
Iron Post Brackets
Nothing worked well in keeping people breathing until 1927, when Philip Drinker and Louis Agassiz Shaw at Harvard University devised a version of a tank respirator that could maintain respiration artificially until a person could breathe independently, usually after one or two weeks. The machine was powered by an electric motor with two vacuum cleaners. The pump changed the pressure inside a rectangular, airtight metal box, pulling air in and out of the lungs.
Cast Iron Post Box
Inventor John Emerson had refined Drinker’s device and cut the cost nearly in half. Inside the tank respirator, the patient lay on a bed (sometimes called a “cookie tray”) that could slide in and out of the cylinder as needed. The side of the tank had portal windows so attendants could reach in and adjust limbs, sheets, or hot packs.