Difficulty: Medium
Average Score: 78%
Simulated
A nurse is planning to administer diphenhydramine 1.25 mg/kg IV to a school-age child who weighs 55 lb. Available is diphenhydramine 50 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.)
Correct answer
0.6
Rationale
To calculate the dose of diphenhydramine for the child:
Step 1: Convert weight to kg: 55 lb ├À 2.2 = 25 kg
Step 2: Calculate the dose: 1.25 mg/kg x 25 kg = 31.25 mg
Step 3: Determine the volume: 31.25 mg ├À 50 mg/mL = 0.625 mL
Step 4: Round to the nearest tenth = 0.6 mL
Therefore, the correct answer is 0.6 mL. Other choices are incorrect because they do not follow the correct calculation steps or rounding procedure.
Step 1: Convert weight to kg: 55 lb ├À 2.2 = 25 kg
Step 2: Calculate the dose: 1.25 mg/kg x 25 kg = 31.25 mg
Step 3: Determine the volume: 31.25 mg ├À 50 mg/mL = 0.625 mL
Step 4: Round to the nearest tenth = 0.6 mL
Therefore, the correct answer is 0.6 mL. Other choices are incorrect because they do not follow the correct calculation steps or rounding procedure.