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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: Exp Neurol. 2020 Jul 17;333:113408. doi: 10.1016/j.expneurol.2020.113408

Figure 6.

Figure 6.

Temporal changes in blood oxygen saturation (SpO2) of a research participant (S3) during a singles sequence (N=15 episodes) of acute intermittent hypoxia (AIH). Gray trace corresponds to the change in SpO2 levels during repetitive breathing bouts at 10.0% and 20.9% O2 (Black trace). Broken black horizontal trace indicates an 80% SpO2 safety threshold. The ‘automated’ system delivers room air when SpO2 dips below 80% during low O2 and extends room air intervals when SpO2 values remain below 80%.