What is an important nursing intervention for a patient undergoing treatment for hyperkalemia?

Monitoring for muscle weakness is a crucial nursing intervention for a patient undergoing treatment for hyperkalemia because elevated potassium levels can lead to significant neuromuscular effects. Hyperkalemia can cause muscle weakness or paralysis, particularly affecting the proximal muscles. Assessing the patient's strength and monitoring any signs of muscle weakness or changes in motor function can help identify possible complications associated with high potassium levels. This vigilance is essential because severe hyperkalemia can lead to life-threatening complications, including cardiac arrhythmias.

While the other options may also be relevant in the context of managing hyperkalemia, muscle weakness is a direct indicator of potassium's impact on neuromuscular function and a critical sign for nursing staff to monitor closely.