To prevent the most common serious complication of peritoneal dialysis, it is important for the nurse to:

Choice A reason: Pulmonary embolism is a blockage in one of the pulmonary arteries in the lungs, usually caused by blood clots that travel to the lungs from the legs or other parts of the body. The signs and symptoms include sudden shortness of breath, rapid breathing (tachypnea), rapid heart rate (tachycardia), and anxiety. These symptoms align with the patient's presentation and are common in the post-operative period, particularly after orthopedic surgery, which increases the risk of deep vein thrombosis (DVT) and subsequent pulmonary embolism.

Choice B reason: Left-sided heart failure can cause symptoms such as shortness of breath, fatigue, and fluid retention. However, the acute presentation of difficulty breathing, tachypnea, tachycardia, and anxiety in the context of recent surgery is more suggestive of a pulmonary embolism. Heart failure symptoms generally develop gradually rather than suddenly.

Choice C reason: Early onset dementia is not characterized by acute respiratory symptoms like difficulty breathing, tachypnea, or tachycardia. Dementia symptoms typically include memory loss, confusion, and changes in cognitive function, not the acute cardiorespiratory symptoms described in this scenario.

Choice D reason: Acute myocardial infarction (heart attack) can cause shortness of breath, chest pain, and rapid heart rate. While it is a possibility, the combination of recent surgery and the described symptoms more strongly suggests a pulmonary embolism. An acute myocardial infarction would typically also present with chest pain, which is not mentioned in this scenario.

Choice A reason: An increase in serum hematocrit indicates that epoetin has been effective. Epoetin, also known as erythropoietin, is a medication used to stimulate the production of red blood cells. In patients with chronic kidney disease, the kidneys may not produce enough natural erythropoietin, leading to anemia. By administering epoetin, the goal is to increase red blood cell production, which is reflected in higher hematocrit levels (the proportion of red blood cells in the blood).

Choice B reason: An increase in serum calcium is not related to the effectiveness of epoetin. Serum calcium levels are regulated by different mechanisms, including parathyroid hormone and vitamin D, and are not directly influenced by epoetin administration.

Choice C reason: A decrease in serum creatinine levels would indicate improved kidney function, but this is not the expected outcome of epoetin therapy. Epoetin specifically targets red blood cell production and does not have a direct impact on kidney function or creatinine levels.

Choice D reason: A decrease in blood pressure is also not an expected indicator of epoetin effectiveness. While managing blood pressure is important in chronic kidney disease, epoetin's primary role is to address anemia by stimulating red blood cell production. Blood pressure regulation involves other medications and interventions.