ArticleNature and science of sleep2026
Beyond a Single Hypoxic Burden Value: Hypoxic Burden Ratio Assessed by Peripheral Arterial Tonometry in Obstructive Sleep Apnea.
Article in Nature and science of sleep, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: Hypoxic burden (HB) integrates the depth and duration of nocturnal oxygen desaturation in obstructive sleep apnea (OSA), but a single HB value may conceal distinct hypoxemic profiles. We explored the relationship between two automated HB measures derived from peripheral arterial tonometry-based home sleep apnea testing (PAT-HSAT) data: desaturation area under the SpO Methods: We performed a retrospective cross-sectional study of 2136 adults with OSA, diagnosed by a peripheral arterial tonometry-derived apnea-hypopnea index based on 3% desaturation criteria (pAHI3%) ≥5 events/h. Three operational HB groups were designated according to the relationship between HB_baseline and HB_<90%. Type 1 was characterized by measurable HB_baseline (>0%·min/h) and HB_<90% = 0%·min/h; the HB_baseline/HB_<90% ratio was not calculable because the denominator was zero. Among patients with measurable HB_<90%, Type 2 was defined by an HB ratio ≥1 and Type 3 by an HB ratio <1. These three groups were prespecified as exploratory operational categories. Results: Type 1, Type 2, and Type 3 comprised 506 (23.7%), 1108 (51.9%), and 522 (24.4%) patients, respectively. The percentage of total sleep time (TST) with SpO Conclusion: The relative magnitude of HB_baseline and HB_<90% provides an exploratory operational framework for describing distinct hypoxemic profiles in OSA beyond a single HB value. The framework is descriptive and hypothesis-generating; its clinical, prognostic, mechanistic, and therapeutic utility has not been established and requires external and longitudinal validation.
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