I was at work and got report at 7pm from the day shift. A client had an order for iv fluids which were not started. So after counting and report for 2 halls, with multiple issues left for me that the previous shift did not do, I started problem solving. I could not get an IV in this patient. They said they tried 3 times.So, I called R.M. to see if they could come and get one in. They stated that the previous nurse called at 2pm and then never called back. My report wasn't complete until 8pm. I got the file out while waiting for RM. The order for IVF was written at 11:15 am. It was for 0.45% NS. I decided to keep going and looked for a lab. The lab said Na166 Critical in bold. So no wonder I couldn't get a IV, but RM had a tough time. This order was for 11:15, this is now 12 hrs later that I started the IVF. What is the time from to follow thru with the IVF. The other shift tried to blame it on me, but, it was 8pm when I took over, which is 9 hrs after the order was written.I read that a Na>150 has a mortality of 75%.Thanks, D.