I'm a new nurse and had a question about agonal breathing. We had a patient in her early 20s who had a bad reaction to Xanax and suffered severe respiratory depression, so severe that she went into agonal breathing. Her VS remained stable and her O2 sat. remained at 100%. ABG's showed alkalosis. Is it normal for the pulsox to show 100% oxygenation with agonal breathing? My only other experience with this was with an older woman before she died, and she was de-satting; but I also know that that is the process with death. I'm curious to know what's the "norm" as far as VS during agonal breathing. Does the body just compensated better in young people? Thank you!