What lab values typically indicate renal failure?

High potassium levels are indicative of renal failure because the kidneys play a crucial role in maintaining the balance of electrolytes, including potassium, in the body. When renal function declines, the kidneys are unable to effectively excrete potassium, leading to hyperkalemia (elevated potassium levels). This condition can result in serious health issues, including cardiac arrhythmias.

In contrast, low blood urea nitrogen (BUN) and creatinine levels would suggest good renal function, as these substances are waste products typically cleared by the kidneys. Normal electrolyte levels would indicate that kidney function is intact, while high hemoglobin levels are typically not associated with renal failure; in fact, chronic kidney disease often leads to anemia, characterized by lower hemoglobin levels due to impaired erythropoiesis from decreased erythropoietin production by the kidneys. Thus, the presence of high potassium levels is a significant lab value to monitor for signs of renal failure.