A nurse is caring for a client who is receiving potassium chloride 40 mEq IV every 4 hr. Which of the following findings indicate the client is becoming hyperkalemic?

Potassium chloride is a high-alert medication used to correct hypokalemia, but improper dosing or impaired renal excretion can lead to hyperkalemia. Potassium plays a critical role in cardiac conduction, muscle function, and neuromuscular activity. Elevated serum potassium levels can rapidly cause life-threatening cardiac dysrhythmias. Early recognition of ECG changes is essential for prompt intervention and prevention of cardiac arrest. A. Hypoactive bowel sounds may occur with hyperkalemia due to decreased smooth muscle activity in the gastrointestinal tract. While this is a possible manifestation, it is a later and less specific sign compared to cardiac changes. Therefore, it is not the most definitive indicator of hyperkalemia in this scenario. B. Sinus rhythm with peaked T waves is a classic early electrocardiographic sign of hyperkalemia. Elevated potassium levels affect cardiac repolarization, leading to tall, narrow, tented T waves on ECG. This finding is one of the most important and early indicators of potentially dangerous potassium elevation. C. Shallow respirations are not a typical early sign of hyperkalemia. While severe hyperkalemia can lead to muscle weakness affecting respiratory muscles, respiratory changes are not as specific or early as cardiac manifestations. ECG changes remain the most reliable indicator. D. Irritability and anxiety are nonspecific neurological symptoms that can occur in many conditions, including stress, hypoxia, or electrolyte imbalances. They are not characteristic or reliable indicators of hyperkalemia and do not reflect the primary cardiac effects of elevated potassium levels.