Key result
Administration of 100% O2 during obstructive apneas significantly attenuated muscle sympathetic nerve activity surges compared to room air (+5% vs +82%; P<0.05), linking these surges to hypoxemia.
Why the study?
Does 100% O2 administration attenuate muscle sympathetic nerve activity surges during obstructive apneas in patients with OSA?
Population
Patients with obstructive sleep apnea (n=12) and age-matched controls (n=15)
Comparison
100% O2 (hyperoxia) administration vs Room air
Design
Other
Authors
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Supports hypoxemia as driver of sympathetic surges in OSA; hypothesis-generating for oxygen intervention trials.
Observational (n=27)
Does 100% O2 administration attenuate muscle sympathetic nerve activity surges during obstructive apneas in patients with OSA?
Absolute Event Rate: 5% vs 82%
p-value: p=<0.05
Blood pressure oscillations during obstructive sleep apnea are partly mediated by sympathetic surges linked to intermittent hypoxemia.
Leuenberger et al. (1995) conducted an observational in Obstructive sleep apnea (n=27). 100% O2 (hyperoxia) vs. Room air was evaluated on Muscle sympathetic nerve activity (MSNA) response compared with awake baseline (p=<0.05). Administration of 100% O2 during obstructive apneas significantly attenuated muscle sympathetic nerve activity surges compared to room air (+5% vs +82%; P<0.05), linking these surges to hypoxemia.
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