intravenous potassium phosphate can be administered to patients who cannot eat or drink to prevent hyperphagia a condition characterized by low blood phosphorus levels a doctor orders that a patient must be delivered 60 per 1000 mL of potassium phosphate what volume of potassium phosphate must be added to a 500 mL IV bag if the potassium phosphate is available in a concentration of 4.4 mL