A client receiving hemodialysis treatments arrives at the h…

 A client receiving hemodialysis treatments arrives at the hospital with a blood pressure of 200/100 mm Hg, a heart rate of 110 beats/minute, and a respiratory rate of 36 breaths/minute. Oxygen saturation on room air is 89%. He complains of shortness of breath, and plus 2 pedal edema is noted. His last hemodialysis treatment was yesterday. Which intervention should be done first?