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ATI Dosage Calculation RN Adult Medical Surgical Proctored Assessment 3.1
Total Questions : 31
Showing 10 questions, Sign in for moreA nurse is preparing to administer ampicillin 500 mg IM every 6 hr. The available ampicillin is in a 500 mg vial.
The package insert instructs to add 1.8 mL of sterile water to yield ampicillin 250 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: The available ampicillin is in a 500 mg vial. The package insert instructs to add 1.8 mL of sterile water to yield ampicillin 250 mg/mL.
Step 2: We need to administer 500 mg of ampicillin. Step 3: The concentration of the solution is 250 mg/mL.
Step 4: To find out how many mL should the nurse administer per dose, we divide the required dose by the concentration.
Step 5: So, 500 mg ÷ 250 mg/mL = 2 mL. The nurse should administer 2 mL per dose.
A nurse is preparing to administer methylprednisolone sodium succinate 30 mg/kg via intermittent IV bolus to a client who weighs 169 lb. The available methylprednisolone sodium succinate is 125 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: The client weighs 169 lb. We need to convert this weight into kg because the dose is prescribed in mg/kg. We know that 1 kg = 2.20462 lb.
Step 2: So, 169 lb ÷ 2.20462 = 76.6572 kg (rounded to the nearest hundredth). Step 3: The prescribed dose is 30 mg/kg.
Step 4: So, 30 mg/kg × 76.6572 kg = 2299.716 mg (rounded to the nearest thousandth). Step 5: The available methylprednisolone sodium succinate is 125 mg/mL.
Step 6: To find out how many mL should the nurse administer, we divide the required dose by the concentration.
Step 7: So, 2299.716 mg ÷ 125 mg/mL = 18.3977 mL (rounded to the nearest thousandth). The nurse should administer 18 mL (rounded to the nearest whole number).
A nurse is preparing to administer hydrochlorothiazide 150 mg PO daily in 3 equally divided doses.
The available hydrochlorothiazide is an oral solution of 50 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: The prescribed dose is 150 mg PO daily in 3 equally divided doses. Step 2: So, each dose is 150 mg ÷ 3 = 50 mg.
Step 3: The available hydrochlorothiazide is an oral solution of 50 mg/5 mL.
Step 4: To find out how many mL should the nurse administer per dose, we divide the required dose by the concentration.
Step 5: So, 50 mg ÷ (50 mg/5 mL) = 5 mL. The nurse should administer 5 mL per dose.
A nurse is preparing to administer pentamidine 4 mg/kg IM to a client who weighs 154 lb. The available pentamidine is 100 mg/mL for injection.
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.)
Explanation
Step 1: The client weighs 154 lb. We need to convert this weight into kg because the dose is prescribed in mg/kg. We know that 1 kg = 2.20462 lb.
Step 2: So, 154 lb ÷ 2.20462 = 69.8532 kg (rounded to the nearest hundredth). Step 3: The prescribed dose is 4 mg/kg.
Step 4: So, 4 mg/kg × 69.8532 kg = 279.4128 mg (rounded to the nearest thousandth). Step 5: The available pentamidine is 100 mg/mL for injection.
Step 6: To find out how many mL should the nurse administer, we divide the required dose by the concentration.
Step 7: So, 279.4128 mg ÷ 100 mg/mL = 2.7941 mL (rounded to the nearest thousandth). The nurse should administer 2.8 mL (rounded to the nearest tenth).
A nurse is preparing to administer acetaminophen 15 mg/kg via intermittent IV bolus to a client who weighs 99 lb. The available acetaminophen is 1,000 mg/100 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.) .
Explanation
Step 1: The client weighs 99 lb. We need to convert this weight into kg because the dose is prescribed in mg/kg. We know that 1 kg = 2.20462 lb.
Step 2: So, 99 lb ÷ 2.20462 = 44.9060 kg (rounded to the nearest hundredth). Step 3: The prescribed dose is 15 mg/kg.
Step 4: So, 15 mg/kg × 44.9060 kg = 673.59 mg (rounded to the nearest hundredth). Step 5: The available acetaminophen is 1,000 mg/100 mL.
Step 6: To find out how many mL should the nurse administer, we divide the required dose by the concentration.
Step 7: So, 673.59 mg ÷ (1,000 mg/100 mL) = 6.7359 mL (rounded to the nearest thousandth). The nurse should administer 7 mL (rounded to the nearest whole number). Sure, let’s go through the calculations for each question:
A nurse is preparing to administer 0.9% sodium chloride 1,200 mL IV to infuse over 8 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: Convert the total volume to mL (since we want the rate in mL/hr): 1200 mL Step 2: Divide the total volume by the total time: 1200 mL ÷ 8 hr = 150 mL/hr So, the nurse should set the IV pump to deliver 150 mL/hr.
A nurse is preparing to administer 0.45% sodium chloride 2.5 L IV to infuse over 24 hr. How many mL should the nurse administer? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: Convert the total volume to mL: 2.5 L = 2500 mL Step 2: Divide the total volume by the total time: 2500 mL ÷ 24 hr = 104.17 mL/hr Step 3: Round to the nearest whole number: 104 mL/hr So, the nurse should administer 104 mL/hr.
A nurse is preparing to administer rifampin 20 mg/kg/day PO in two divided doses to a client who weighs 132 lb and has tuberculosis.
The available rifampin is in 150 mg capsules.
How many capsules should the nurse administer per dose? (Round the answer to the nearest whole number.)
Explanation
Step 1: Convert the client’s weight to kg: 132 lb = 59.87 kg (approx) Step 2: Calculate the total daily dose: 20 mg/kg/day × 59.87 kg = 1197.4 mg/day Step 3: Divide the total daily dose by the number of doses: 1197.4 mg ÷ 2 = 598.7 mg/dose Step 4: Divide the dose by the available capsule strength: 598.7 mg ÷ 150 mg/capsule = 3.99 capsules Step 5: Round to the nearest whole number: 4 capsules So, the nurse should administer 4 capsules per dose.
A nurse is preparing to administer morphine 7.5 mg subcutaneously.
The available morphine is an injection of 10 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth.
Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: Divide the ordered dose by the available strength: 7.5 mg ÷ 10 mg/mL = 0.75 mL So, the nurse should administer 0.75 mL.
A nurse is preparing to administer belimumab 10 mg/kg via intermittent IV bolus to a client who weighs 136 lb. Available is belimumab 80 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: Convert the client’s weight to kg: 136 lb = 61.69 kg (approx) Step 2: Calculate the total dose: 10 mg/kg × 61.69 kg = 616.9 mg Step 3: Divide the total dose by the available strength:
616.9 mg ÷ 80 mg/mL = 7.71 mL Step 4: Round to the nearest whole number: 8 mL So, the nurse should administer 8 mL.
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