ALVAN L. BARACH, M.D.
To the editor: In reference to the correspondence on altitude and O2 therapy in chronic lung disease in the ANNALS (73:659, 1970), since 1938 I have observed prolongation of life as a result of residence in oxygen chambers (1). A patient who had a chamber in her town house, as well as one in the country, lived comfortably, without shortness of breath, for more than 2 years at a concentration of 50% to 60% oxygen. One day when she was taken out on her customary excursion to the end of the flower garden nursery, the portable oxygen cylinder became empty,
BARACH AL. Altitude and O2 Therapy. Ann Intern Med. ;74:449. doi: 10.7326/0003-4819-74-3-449_1
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Published: Ann Intern Med. 1971;74(3):449.
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