I had foot surgery a few months ago. When I came to from GA, my nurse was worried that my heart rate was a little too high. He did an ultrasound of my bladder,

I had foot surgery a few months ago. When I came to from GA, my nurse was worried that my heart rate was a little too high. He did an ultrasound of my bladder, turns out no one had cathed me and I had 1200 ml of urine. Apparently the discomfort of an overfull bladder was causing higher heart rate. Nurse was shocked when he saw the ultrasound, ran to get the equipment to drain the bladder.