Editing Pediatric Nursing – RN Practice Questions (section)

==Question 3==
A child weighing 33 lb is prescribed ceftriaxone 50 mg/kg intravenously once daily. The reconstituted vial contains 100 mg/mL. How many milliliters should the nurse administer? Record your answer to the nearest tenth.
# 3.3 mL
# 7.5 mL
# 15.0 mL
# 16.5 mL

'''Answer:''' 2. 7.5 mL

''Rationale:'' Convert the weight: 33 lb divided by 2.2 equals 15 kg. Multiply: 15 kg x 50 mg/kg equals 750 mg. Divide by the concentration: 750 mg divided by 100 mg/mL equals 7.5 mL. Option 1 results from dividing the pounds by 10; option 3 comes from using the weight in kilograms as the volume; option 4 comes from failing to convert pounds to kilograms.