Problem: A 72-year-old man with chronic renal failure is in the hospital in serious condition recovering from a heart attack. He is receiving fluid through an IV line. Late one night, a tired nurse replaces the man's empty IV bag with hypertonic 1.8% saline and the mistake is not noticed until the following morning when the man exhibits marked pitting edema and inspiratory rales. A chest X-ray reveals interstitial edema in the lungs and blood tests reveal the following: Na+ 156 mEq/L K+ 4.5 mEq/L Cl- 100 mEq/L Need Assignment Help?