A year or so ago I took care of someone who was admitted the night before with rapid a-fib to a telemetry cardiac floor. Since her main problem was cardiac, I guess everybody missed the ABG with respiratory acidosis that was drawn in the ED.
After I got report and looked at her ABG I thought there must have been some respiratory intervention I didn't know about because she looked fine, the RT had already been in and hadn't sad anything about low sats, she was A&O, etc." Several hours later I thought to double check with the RT that something has been done the night before. Sure enough, nothing had been done. The RT drew another ABG, pH was 7.11, and we rushed that patient to the unit for some BiPAP!
The funny thing was that the patient really didn't look all that "bad" for having such bad numbers. If I hadn't kept investigating the situation I'm not sure when her respiratory issue would have been addressed. I felt pretty good about my nursing care that day!
(It is nice to brag on myself when most of the times I am criticizing myself for mistakes that I make!)