A nurse is cаring fоr а client with а histоry оf heart failure. The client reports increasing shortness of breath and fatigue over the past week. Assessment reveals an SpO2 of 90% on room air, dark and concentrated urine, pronounced abdominal ascites, and a 10-lb weight loss over the past week despite the visible fluid accumulation. Patient reports he has eaten and drank very little over the last 2 weeks due to dyspnea. What is the nurse's priority action, and what should the nurse anticipate the provider will order?