The nurse is assigning care of a client with prostatitis to a practical nurse (PN). Which instruction should the nurse provide the PN regarding this client?

Choice C is correct because vitamin K can interfere with the anticoagulant effect of warfarin and increase the risk of clotting. The client should maintain a consistent intake of vitamin K from food sources, such as dark green leafy vegetables, to avoid fluctuations in the blood levels of warfarin.

Choice A is incorrect because increasing the intake of dark green leafy vegetables while taking warfarin can decrease the effectiveness of warfarin and increase the risk of clotting.

Choice B is incorrect because eating two servings of dark green leafy vegetables daily and continuing for 30 days after warfarin therapy is completed can cause unpredictable changes in the blood levels of warfarin and increase the risk of bleeding or clotting.

Choice D is incorrect because avoiding any foods that contain any vitamin K while taking warfarin can increase the sensitivity to warfarin and increase the risk of bleeding.

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.