ATI Dosages by Weight Dosage Calculation 3.0 Dosage by Weight Test| Questions

1-A nurse is preparing to administer cefaclor 40 mg/kg/day PO divided in equal doses every 8 hr to a child who weighs 48 lb. Available is cefaclor suspension 375 mg/5 mL. How many mL should the nurse administer per dose? 3.9 mL Step 1: What is the unit of measurement the nurse should calculate? kg Step 2: Set up an equation and solve for X. X kg = 21.818181 kg Step 3: What is the unit of measurement the nurse should calculate? mg Step 4: Set up an equation and solve for X. X = Dose per kg × Client's weight in kg X mg = 40 mg/kg × 21.818181 kg X mg = 872.727272 mg The dose is divided equally every 8 hours; therefore, divide X by 3. Step 5: What is the unit of measurement the nurse should calculate? mL Step 6: What is the dose the nurse should administer? Dose to administer = Desired 290.909090 mg Step 7: What is the dose available? Dose available = Have 375 mg Step 8: Should the nurse convert the units of measurement? No Step 9: What is the quantity of the dose available? 5 mL Step 10: Set up an equation and solve for X. X mL = 3.878787 mL 2-A nurse is preparing to administer potassium gluconate 2 mEq/kg/day PO divided equally every 12 hr to a child who weighs 50 lb. How many mEq should the nurse administer per dose? 22.7 mEq Step 1: What is the unit of measurement the nurse should calculate? kg Step 2: Set up an equation and solve for X. 2.2 lb Client's weight in lb = 21. 2k glb 4X8 klbg = 1 kg X kg 872.727272 mg = 290.909090 mg 3 Have Desired = Quantity X 375 mg 290.909090 mg = 5 mL X mL EXAM X kg = 22.727272 kg Step 3: What is the unit of measurement the nurse should calculate? mEq Step 4: Set up an equation and solve for X. X = Dose per kg × Client's weight in kg X mEq = 2 mEq/kg × 22.727272 kg X mEq = 45.454545 mEq The dose is divided equally every 12 hours; therefore, divide X by 2. 3-A nurse is preparing to administer gentamicin to a client who weighs 165 lb. The medication reference recommends administering 2 mg/kg IM every 8 hr. How many mg should the nurse plan to administer per dose? 150 mg Step 1: What is the unit of measurement the nurse should calculate? kg Step 2: Set up an equation and solve for X. X kg = 75 kg Step 3: What is the unit of measurement the nurse should calculate? mg Step 4: Set up an equation and solve for X. X = Dose per kg × Client's weight in kg X mg = 2 mg/kg × 75 kg X mg = 150 mg