A client is receiving heparin intravenous (IV) at a rate of 1,800 units/hour. The IV solution is labeled, "Heparin Sodium 20,000 Units in 5% Dextrose Injection 500 mL* After receiving the partial thromboplastin time (PTT) result, the healthcare provider prescribes an Increase of 5 mL/hour in the IV rate. The nurse should set the infusion pump to deliver how many mL/hour? (Enter numeric value only.)

First, let’s calculate the current infusion rate in mL/hour. The IV solution contains 20,000 units of heparin in 500 mL, so the concentration is: Concentration = Total units/ Total volume ​= 20,000 units /500 mL ​= 40 units/mL The client is currently receiving 1,800 units/hour. At a concentration of 40 units/mL, this dosage is equivalent to: Current rate = Dose/ Concentration ​= 1,800 units/hour​ / 40 units/mL = 45 mL/hour The healthcare provider prescribed an increase of 5 mL/hour in the IV rate. Therefore, the new rate should be: New rate = Current rate + Increase = 45 mL/hour + 5 mL/hour = 50 mL/hour So, the nurse should set the infusion pump to deliver 50 mL/hour. If rounding is required, this is already rounded to the nearest whole number.