Multiple choice Heparin drip 5,000 units/hr. Pharmacy sends Heparin 30,000 units in 1 L of NS. Ml/hr? 0.166666 ml/hr 0.1 ml/hr 166.67 ml/hr 168 ml/hr Reveal answer Fill a bubble to check yourself C Correct answer Explanation The concentration is 30,000 units / 1000 ml = 30 units/ml. To deliver 5,000 units/hr, divide the desired dose by the concentration: 5000 / 30 = 166.67 ml/hr.