Sepsis and septic shock There are conflicting studies on how SpO2 is biased in the setting of sepsis and septic shock.
It's a wonderful tool to get a sense of their oxygen status.
Methylene blue has also been used as a dye in endoscopic polypectomy where it is injected into the submucosa around the polyp to be removed, marking the site in the event additional tissues need to be excised.