मैग्नीशियम युक्त दवाएं देने के लिए निम्नलिखित में से कौन सी स्थिति एक प्रमुख निषेध (contraindication) है?

A postoperative patient receiving 5% dextrose in 0.45% normal saline at 160 mL/hour exhibits puffiness, a weight gain of 2 kg, confusion, and muscle cramps. The serum sodium level is reported as 126 mEq/L. Which condition is most indicated?

In cases of severe, refractory hyperkalemia accompanied by renal failure, which definitive intervention must the nurse prepare the client for?