<https://pubs.asahq.org/anesthesiology/article/89/1/19/36932/Hypercapnia-Prevents-Jugular-Bulb-Desaturation>
<http://schema.org/image>
<https://asa2.silverchair.com/anesthesiology/article/89/1/19/36932/Hypercapnia-Prevents-Jugular-Bulb-Desaturation>