A 6-week-old infant with pyloric stenosis is scheduled for a pyloromyotomy. Which pre-operative nursing action has the highest priority?

Choice C reason: 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 reason: 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 reason: 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 reason: 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.

Choice A reason: Reinforcing need for adequate hydration is not the most important action for the nurse to implement, as this is a general recommendation for all clients and does not address the specific needs of this client. This is a distractor choice.

Choice B reason: Providing typed instructions for healthy diet selection is not the most important action for the nurse to implement, as this may not be feasible or accessible for this client who lives in a poor neighborhood and may have limited resources and literacy. This is another distractor choice.

Choice C reason: Scheduling follow-up appointments with specialists is the most important action for the nurse to implement, as this can ensure that this client receives continuous and comprehensive care for their complex and chronic conditions, which can improve their outcomes and quality of life. Therefore, this is the correct choice.

Choice D reason: Demonstrating specific breathing and walking exercises is not the most important action for the nurse to implement, as this can be done by other health care professionals or at home by the client. This is another distractor choice.