In contrast, the approach taken regarding the patient's tentative diagnosis of OSA was markedly flawed, and it is concerning that this could misinform trainees regarding the appropriate evaluation, diagnosis, and treatment of OSA. Although the authors presumed a high probability of OSA based on the patient's physical examination, they did not report that they obtained a sleep history, which should be standard in the evaluation of OSA. The diagnostic test used in this patient, who had a waking oxygen saturation of 89% while breathing 8 L/min supplemental oxygen, was overnight oximetry. There is no description provided of the oximetry results. This may be because there has been no validation of this testing and no consensus on how to interpret overnight oximetry for the purpose of evaluating OSA in otherwise healthy individuals.2 In patients such as the one whose case was described, the utility of oximetry is even more problematic, because the false-positive rate increases with underlying pulmonary disease and the false-negative rate increases with the administration of supplemental oxygen.