in normal pts, I just take it when they're sitting in the bed. If it's elevated, I will tilt them off their back and retake it. If it's better when they are off their back, I'll just let the physician know, hey, the BP was this on her back, on her side it was this. For PIH pts, I'll usually just take it however she happens to be lying. I had a PIH induction the other night and the MD said to call if it's above a certain number on her side.