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Figure 1: A 120 s epoch of polysomnography tracing in N3 showing the occurrence of vagus nerve stimulation-induced flow limitation corresponding to vagus nerve stimulation (artifact in the vagus nerve stimulation channel [vagus nerve stimulation 1]; between the arrows). At the patient's original vagus nerve stimulation settings (output current 2.25 mA), some of these flow limitations were accompanied by SaO2 desaturations of 3% (SaO2 falls from 98% to 95%; box)

Figure 1: A 120 s epoch of polysomnography tracing in N3 showing the occurrence of vagus nerve stimulation-induced flow limitation corresponding to vagus nerve stimulation (artifact in the vagus nerve stimulation channel [vagus nerve stimulation 1]; between the arrows). At the patient's original vagus nerve stimulation settings (output current 2.25 mA), some of these flow limitations were accompanied by SaO<sub>2</sub> desaturations of 3% (SaO<sub>2</sub> falls from 98% to 95%; box)