A 10-year-old child is admitted with periorbital edema, frothy urine, and a serum albumin of 1.8 g/dL. The nurse notes the child's urine dipstick shows 4+ proteinuria and blood pressure is 90/60 mmHg. Which nursing intervention is the highest priority at this time?
- Elevate the lower extremities to reduce peripheral edema
- Restrict dietary sodium and fluid intake as ordered
- Monitor for signs of infection such as fever, erythema, and purulent drainage
- Encourage high-protein foods to compensate for urinary protein losses