First and foremost, I don't like art lines. I find them in patients coming from PACU with no real need for them in the first place in almost every instance. That said, I had a patient last week with an art line that was frequently moving and had significantly elevated pressures. I zeroed the art line myself as well as 2 other RN's, both of which were more experienced than I am. The pressures on the art line weren't correlating with pressures taken from the cuff, as in they were reading 200-220's while his SBP's were running 150-160 for the most part. I couldn't find the culprit and neither could the other RN's that looked into it. The thing I should have done is discontinue the art line altogether because there was no order for it from the MD in the first place. The much more experienced ICU nurse said "not to worry about it". When I gave report to the day shift RN, I commented that the pressures weren't correlating and that I should have just had the PACU RN pull it prior to bringing the patient to our floor. The day shift RN went to management and evidently complained that I just increased the parameters up to 250 (which I didn't increase that high). It appears management wants to talk to me about this and I feel like I may have done wrong by not either discontinuing the line in the first place or not demanding the MD put in an order. That said, I did seek additional input and attempted to troubleshoot the problem as to why the pressures were reading so high. Long story short-can anyone explain why it would seem art pressures would seem to be substantially different when everything is positioned correctly? I can see variance of 10-20 with no issue, but I'm talking pressure differences in 50-60. I will tell them I attempted to troubleshoot the culprit with other RN's, but what else could I have done differently in the future (short of just pulling the stinking line in the first place)?