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Fig. 1 | BMC Pulmonary Medicine

Fig. 1

From: Multi-center, randomized, placebo-controlled trial of nocturnal oxygen therapy in chronic obstructive pulmonary disease: a study protocol for the INOX trial

Fig. 1

Nocturnal oximetry tracings in patients with COPD not qualifying for LTOT. a Significant nocturnal oxygen desaturation (>30% of the recording time with a saturation < 90%) without periodic variations in saturation, a tracing not suggestive of sleep apnea. b Significant nocturnal oxygen desaturation with cyclical changes in saturation suggesting sleep apnea, a tracing suggestive of sleep apnea

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BMC Pulmonary Medicine

ISSN: 1471-2466

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