Allied Healthcare Products, Inc. manufactures and markets respiratory care products, medical gas equipment, and emergency medical products. Its respiratory care products include respiratory care/anesthesia products comprising carbon dioxide absorbents, air compressors, calibration equipment, humidifiers, croup tents, equipment dryers, and respiratory disposable products, as well as a range of respiratory disposable products, such as oxygen tubing, facemasks, cannulas, and ventilator circuits; and home respiratory care products consisting of aluminum oxygen cylinders, oxygen regulators, pneumatic nebulizers, portable suction equipment, and various respiratory disposable products. The company's medical gas equipment product line comprises construction products, including in-wall medical gas system components, central station pumps and compressors, and headwalls; regulation devices and suction equipment consisting of flowmeters, vacuum regulators, and pressure regulators, as well as related adapters, fittings, and hoses; and disposable cylinders that provide oxygen for short periods. Its emergency medical products portfolio comprises respiratory/resuscitation products, including demand resuscitation valves, portable resuscitation systems, bag masks and related products, emergency transport ventilators, precision oxygen regulators, minilators, multilators, and humidifiers; and trauma and patient handling products consisting of spine immobilization products, pneumatic anti-shock garments, and trauma burn kits. The company sells its products primarily to hospitals, hospital equipment dealers, hospital construction contractors, home health care dealers, emergency medical products dealers, and others. It has operations in Canada, Mexico, Central and South America, Europe, the Middle East, and the Far East. The company was founded in 1979 and is headquartered in St. Louis, Missouri.