A negative pressure ventilator (NPV) is a type of mechanical ventilator that stimulates an ill person's breathing by periodically applying negative air pressure to their body to expand and contract the chest cavity.[1][2][3][4][5][6]
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- ^ Jackson, Christopher D., MD, Dept. of Internal Medicine, and Muthiah P Muthiah, MD, FCCP, D-ABSM, Assoc. Prof. of Medicine, Div. of Pulmonary / Critical Care / Sleep Medicine, Univ. of Tennessee College of Medicine-Memphis, et.al., "What is the background of the iron lung form of mechanical ventilation?," April 11, 2019, Medscape, retrieved April 12, 2020 (short summary of iron history and technology, with photo)