A nurse is preparing to administer morphine 0.1 mg/kg IV bolus every 3 to 4 hr PRN for pain to a school-age child who weighs 51 lb. Available is morphine injection 2 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

To calculate the dose: Convert the child’s weight from pounds to kilograms: 1 kg = 2.2 lb 51 lb÷2.2=23.2 kg Calculate the prescribed dose in mg: 0.1 mg/kg×23.2 kg=2.32 mg Determine the volume in mL to administer: The concentration of the medication is 2 mg/mL. 2.32 mg÷2 mg/mL=1.16 mL Round to the nearest tenth: 1.16 = 1.2 mL