It's just before midnight and as I went in to check on Jack before calling it a night, I noticed his pulse-ox was off. Yikes! That could have been disastrous. I have no idea how it got turned off, but when I turned it back on, Jack's sats were lower than normal and his heart rate was higher than normal. Jack looks fine. His airway is clear when I suction him, so that's not the problem. I ask him "what's wrong?" "Do you hurt somewhere?"