Aclient had an open reduction and internal fixation of the head of the femur. in the postanesthesia care unit, the client's vital signs remained stable for 1 hour, with a blood pressure (bp) 130/78 mm hg, pulse (p) 68, and respiration (r) 16. one hour after returning to the postsurgical unit, the client's vital signs are bp 100/60 mm hg, p 74, and r 22, and the client is restless. what should the nurse do first?