odium polystyrene sulfonate (Kayexalate) is prescribed for a client following crush injury. The drug is effective if: 1. The pulse is weak and irregular. 2. The serum potassium is 4.0 mEq/L (4.0...

odium polystyrene sulfonate (Kayexalate) is prescribed for a client following crush injury. The drug is effective if:

1. The pulse is weak and irregular.

2. The serum potassium is 4.0 mEq/L (4.0 mmol/L).

3. The ECG is showing tall, peaked T waves.

4. There is muscle weakness on physical examination.