Correct Answer: A

Rationale: The correct answer is A, the 50-year-old with an ileostomy, should be monitored most closely for dehydration. Patients with an ileostomy have a higher risk of dehydration due to increased fluid loss through the stoma. Monitoring their fluid intake, output, electrolyte levels, and signs of dehydration is crucial to prevent complications. The other choices are less likely to experience severe dehydration compared to the patient with an ileostomy. The 72-year-old with diabetes mellitus may be at risk for dehydration, but it is not as high a risk as the patient with an ileostomy. The 19-year-old with chronic asthma and the 28-year-old with a broken femur are not as directly related to dehydration compared to the patient with an ileostomy.

Correct Answer: D

Rationale: The correct answer is D: Impaired gas exchange related to alveolar-capillary membrane changes. This is the most appropriate nursing diagnosis for a patient with pneumonia and lower lobe infiltrates. The rationale is that pneumonia causes inflammation and fluid accumulation in the alveoli, impairing the exchange of oxygen and carbon dioxide in the lungs. This directly affects gas exchange. Choice A is incorrect because ineffective breathing pattern is a broad nursing diagnosis that does not specifically address the underlying issue of impaired gas exchange in pneumonia. Choice B is incorrect as the risk of infection related to the chest x-ray procedure is unrelated to the patient's current condition of pneumonia. Choice C is also incorrect as dehydration does not directly correlate with the patient's diagnosis of pneumonia and lower lobe infiltrates.

Correct Answer: B

Rationale: The correct answer is B: Bence jones protein in the urine. In multiple myeloma, abnormal plasma cells produce excess monoclonal immunoglobulins, including Bence Jones proteins, which can be detected in the urine. This is a hallmark finding in multiple myeloma diagnosis. A: Incorrect. Serum creatinine levels are typically not affected in multiple myeloma. C: Incorrect. Hypercalcemia, not hypocalcemia, is commonly seen in multiple myeloma due to bone destruction. D: Incorrect. Multiple myeloma often presents with high serum protein levels, not low levels.

Correct Answer: D

Rationale: The correct answer is D: Impaired gas exchange related to alveolar-capillary membrane changes. This nursing diagnosis is appropriate for a patient with pneumonia and lower lobe infiltrates because pneumonia causes inflammation and fluid accumulation in the alveoli, leading to impaired gas exchange. The nurse correctly identified the underlying respiratory issue. A: Ineffective breathing pattern related to pneumonia is incorrect as it focuses on the pattern of breathing rather than the physiological problem causing the breathing difficulty. B: Risk for infection related to chest x-ray procedure is incorrect as the patient already has a diagnosis of pneumonia, so the focus should be on managing the existing condition. C: Risk for deficient fluid volume related to dehydration is incorrect as there is no indication of dehydration in the question stem. In summary, the nurse's diagnosis of Impaired gas exchange related to alveolar-capillary membrane changes is the most appropriate as it addresses the respiratory issue caused by pneumonia and lower lobe infiltrates.

Correct Answer: A

Rationale: The correct answer is A: Anemia. Anemia is a common condition characterized by a decrease in red blood cells or hemoglobin levels, leading to symptoms like fatigue and weakness. It is often suspected based on symptoms such as pale skin and shortness of breath. Rheumatic arthritis (B) is a type of arthritis affecting joints, not related to the blood. Leukemia (C) is a type of cancer affecting the blood and bone marrow. Systemic Lupus Erythematosus (SLE) (D) is an autoimmune disease that can affect various organs, not specifically related to blood cell levels. Therefore, based on the symptoms described, anemia is the most likely condition to be suspected.