This has happened to me twice recently. I have had some very sick patients on bipap (DNR) who were near death. When the patients desaturated, and I suggested to the respiratory therapist (both times already at the bedside with me) to turn the fio2 up to 100%, they balk and only go up to 50%. So I have to go over myself and push the buttons. Both patients died pretty soon after this despite some improvement in sat. I don't think the patients died because of hypoxemia.
Anyway, it just seems crazy to me, if somebody is hypotensive, desaturating, and barely alive, why be stingy with the o2? Has anybody else had this issue?