Which laboratory results should the nurse closely monitor in a client who has end-stage renal disease (ESRD.?

Choice A: Obtain a blood pressure reading before the client gets out of bed. This is the most important intervention, as it can prevent or detect orthostatic hypotension, which is a drop in blood pressure when changing position from lying to standing. Orthostatic hypotension can cause dizziness, fainting, or falls, and it can be caused by medications, dehydration, or cardiac problems.

Choice B: Monitor and record the client's urinary output every day. This is not the most important intervention, as it does not address the client's anxiety or adjustment issues. The urinary output should be monitored for signs of fluid balance, kidney function, or infection, but it is not a priority for this client.

Choice C: Provide the client with teaching regarding a cardiac diet. This is not the most important intervention, as it does not address the client's anxiety or adjustment issues. The cardiac diet should be taught to promote heart health, lower cholesterol, and reduce sodium intake, but it is not a priority for this client.

Choice D: Assess the client's vital signs every 4 hours when awake. This is not the most important intervention, as it does not address the client's anxiety or adjustment issues. The vital signs should be assessed for signs of infection, pain, or hemodynamic instability, but they are not a priority for this client.

Choice C is correct because serum potassium, calcium, and phosphorus are electrolytes that can be affected by ESRD. ESRD is a condition in which the kidneys lose their ability to filter waste products and excess fluids from the blood. This can cause electrolyte imbalances that can lead to serious complications, such as cardiac arrhythmias, bone disorders, or metabolic acidosis. The nurse should closely monitor these electrolytes and report any abnormal values.

Choice A is incorrect because blood pressure, heart rate, and temperature are vital signs that are not specific to ESRD. Vital signs can be influenced by many factors and may not reflect the severity of kidney damage. The nurse should monitor vital signs regularly, but not as closely as electrolytes.

Choice B is incorrect because leukocytes, neutrophils, and thyroxine are not laboratory results that are directly related to ESRD. Leukocytes and neutrophils are types of white blood cells that are involved in immune response and inflammation. Thyroxine is a hormone that regulates metabolism and growth. These laboratory results may be altered by other conditions or medications, but not by ESRD.

Choice D is incorrect because erythrocytes, hemoglobin, and hematocrit are laboratory results that measure the red blood cell count and oxygen-carrying capacity of the blood. These laboratory results may be decreased in ESRD due to anemia, which is a common complication of chronic kidney disease. However, anemia is not as life-threatening as electrolyte imbalances and can be treated with erythropoietin injections or iron supplements.