There was no charge nurse to call I was the only nurse on duty....that is how we work there as we are a very small facility....when I said it pulsed up the line what I meant was that it pulsed backwards but did not go past the j loop on the tubing...not actually past that....it just stayed at that level and pulsed, went no further and flushed back very easily. I did run the abt because he needed it and I was unsure that the nurse coming on would be able to start the IV at all. I am home now and can't stop thinking about it.