Sleep Hypoxemia at High Altitude

To the Editor: We are almost certain that Dr. H. Winterstein¹ would have enjoyed the paper by Sutton et al.² even more than we did. We suspect, however, that he, like us, would have been disappointed that his name did not appear among the references and that the authors chose to explain their findings by stating that carbon dioxide tension was increased in the cerebrospinal fluid. Since the data of Sutton et al. show a decrease in arterial carbon dioxide pressure, it seems to us that the observed ventilatory drive would be better explained by the loss of bicarbonate from. . . No extract is available for articles shorter than 400 words.