Ok so I was taking care of this pt, without giving too much info, his systolic pressures at night usually are 90-100 systolic maybe once or twice he'll drop to systolic of 80s, but his MAP stays above 60s. I was off a few days and started taking care of him and they nurse told me that his systolic has been 70-80 with MAPs consistently in the 50s. When asked what the MD order she stated, that they were aware and didnt want to do anything. The MD was on the unit so I trended the bp for her to see and she said, not to page her unless it "stays below a MAP of 50 for a while." systolic even in the 60s at times, she said its fine. I didnt feel comfortable with this, MAPs of 60 ok but less than 50?????? and what for a while? Anyone know of research that support of MAPs less than 50???? What is your thought.