Abstract
Joseph Barcroft (1872–1947) was an eminent British physiologist who made contributions to many areas. Some of his studies at high altitude and related topics are reviewed here. In a remarkable experiment he spent 6 days in a small sealed room while the oxygen concentration of the air gradually fell simulating an ascent to an altitude of nearly 5500 m. The study was prompted by earlier reports by J.S. Haldane that the lung secreted oxygen at high altitude. Barcroft tested this by having blood removed from an exposed radial artery during both rest and exercise. No evidence for oxygen secretion was found and the combination of 6 days incarceration and the loss of an artery was heroic. In order to obtain more data, Barcroft organized an expedition to Cerro de Pasco, Peru, altitude 4300 m, that included investigators from both Cambridge UK and Harvard. Again oxygen secretion was ruled out. The protocol included neuropsychometric measurements and Barcroft famously concluded that all dwellers at high altitude are persons of impaired physical and mental powers, an assertion that has been hotly debated. Another colorful experiment in a low-pressure chamber involved reducing the pressure below that at the summit of Mt. Everest but giving the subjects 100 % oxygen to breathe while exercising as a climber would on Everest. The conclusion was that it would be possible to reach the summit while breathing 100 % oxygen. Barcroft was exceptional for his self-experimentation under hazardous conditions.
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B. West, J. (2015). Joseph Barcroft’s Studies of High Altitude Physiology. In: Essays on the History of Respiratory Physiology. Perspectives in Physiology. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-2362-5_20
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DOI: https://doi.org/10.1007/978-1-4939-2362-5_20
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