A nurse is collecting data from a client who is in renal failure. The nurse should identify that which of the following findings is a manifestation of hyperkalemia?

A. Trousseau's sign indicates hypocalcemia, not hyperkalemia. It is assessed by inflating a blood pressure cuff around the upper arm and observing for muscle spasms in the hand and wrist, which is not related to potassium levels. B. Irregular heart rate. Hyperkalemia can lead to cardiac dysrhythmias due to its effect on myocardial excitability and conduction. Elevated potassium levels can cause changes in the electrocardiogram (ECG), such as peaked T waves and prolonged PR intervals, which may result in an irregular heart rate and can be life-threatening if not addressed. C. Hyperactive reflexes are typically associated with conditions such as hypercalcemia or neurological disorders, not hyperkalemia. Hyperkalemia can lead to decreased neuromuscular excitability and may present with muscle weakness or decreased reflexes. D. Dry mucous membranes is more indicative of dehydration or a fluid volume deficit rather than hyperkalemia. Clients with renal failure may have fluid retention and edema due to impaired kidney function, which is contrary to the presentation of dry mucous membranes.