Sepanx

Hi to all the experts! Please I just need help to see if what I did was literally useless and can cause harm:nurse: I have a pt. in LTACH, she was on traech collar, 35%, we were changing her after a BM and after we turned her she became hypoxic, purplish, initially 80's then 70's and sats went down to 66%. She still has spontaneous breathing. I bagged her through her traech but the tubing was not connected to the oxygen source, which I totally forgot. We hit the staff assist button, and RT came and shouted that O2 was not on. Now, I feel useless manually bagging her because I thought ambu bag can be use even if it is not connected to the oxygen source. Can ambubag be used during this case without being connected through the oxygen though?thanks!