A nurse is preparing to administer ondansetron 0.15 mg/kg IV bolus to a school-age child who weighs 78 lb. Available is ondansetron solution for injection 2 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Step 1: Convert the child's weight from pounds to kilograms. We know that 1 kg = 2.2 lb, Weight in kg=Weight in lb=78/2.2≈35.45 kg Step 2: Calculate the required dose of ondansetron in mg. The prescribed dose is 0.15 mg per kg: Dose in mg=0.15 mg/kg×35.45 kg=5.318 mg Step 3: Determine the volume of ondansetron to administer. To determine how many mL the nurse should administer, we use the following formula: Volume (mL)=Dose in mg/Concentration in mg/mL=5.318 mg/2 mg/mL=2.659 mL Step 4: Round the answer: Rounding 2.659 mL gives 2.7 mL.