Video Library
Medication Calculation Competency Exam
ATI Medication Calculation Competency Exam
Total Questions : 25
Showing 10 questions Sign up for moreA nurse is preparing to administer digoxin 8 mcg/kg/day PO to divide equally every 12 hr for a preschooler who weighs 33 lb. Available is digoxin elixir 0.05 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
To calculate the dose of digoxin for the preschooler, we'll follow these steps:
Step 1: Convert the child's weight from pounds to kilograms:
33 pounds x (1 kg / 2.20462 pounds) ≈ 15 kg
Step 2: Calculate the total daily dose of digoxin:
Total Daily Dose (mcg) = Digoxin Dose (mcg/kg/day) x Weight (kg)
Total Daily Dose = 8 mcg/kg/day x 15 kg
Total Daily Dose = 120 mcg/day
Step 3: Calculate the dose per administration (BID):
Dose per Administration = Total Daily Dose / Number of Administrations per Day
Dose per Administration = 120 mcg/day / 2 doses/day
Dose per Administration = 60 mcg/dose
Step 4: Convert micro-grams to milligrams:
60 mcg x (1 mg / 1000 mcg) = 0.06 mg
Step 5: Calculate the volume to be administered:
Volume (mL) = Desired Dose (mg) / Concentration (mg/mL)
Volume = 0.06 mg / 0.05 mg/mL
Volume = 1.2 mL
Therefore, the nurse should administer 1.2 mL of digoxin elixir per dose.
A nurse is caring for a client who is postoperative hip arthroplasty and has a new prescription for enoxaparin 1 mg/kg/dose subcutaneous every 12 hr. The client weighs 95 lbs. How many mg should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
To calculate the enoxaparin dose, we'll follow these steps:
Step 1: Convert the patient's weight from pounds to kilograms:
95 pounds x (1 kg / 2.20462 pounds) ≈ 43.1 kg
Step 2: Calculate the enoxaparin dose:
Enoxaparin Dose = 1 mg/kg/dose x 43.1 kg
Enoxaparin Dose ≈ 43.1 mg/dose
Rounding 43.1 to the nearest tenth, the nurse should administer 43.2 mg of enoxaparin per dose.
A nurse is preparing to administer atenolol 25 mg PO every 12 hr. The amount available is atenolol 50 mg/tab. How many tablets should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
To calculate the number of tablets needed, we'll set up a proportion:
x tablets / 25 mg = 1 tablet / 50 mg
Cross-multiplying:
50x = 25
Solving for x:
x = 25 / 50
x = 0.5
Therefore, the nurse should administer 0.5 tablets of atenolol per dose.
A nurse is preparing to administer ticarcillin / clavulanate 3.1 g by intermittent IV bolus over 30 min. Available is ticarcillin/clavulanate 3.1 g in 50 mL 0.9% sodium chloride (NSS). 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
To calculate the infusion rate, we'll use the following formula:
Infusion Rate (mL/hour) = Total Volume (mL) / Infusion Time (hours)
First, convert minutes to hours:
30 minutes x (1 hour / 60 minutes) = 0.5 hours
Then, plug in the values into the formula:
Infusion Rate = 50 mL / 0.5 hours
Calculating the result:
Infusion Rate = 100 mL/hour
Therefore, the nurse should set the IV pump to deliver 100 mL/hour.
A nurse is preparing to administer aspirin 650 mg PO every 12 hr. The amount available is aspirin 325 mg tablets. How many tablets 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
To calculate the number of tablets needed, we'll set up a proportion:
x tablets / 650 mg = 1 tablet / 325 mg
Cross-multiplying:
325x = 650
Solving for x:
x = 650 / 325
x = 2
Therefore, the nurse should administer 2 tablets of aspirin per dose.
A nurse is preparing to administer amoxicillin 100 mg PO every 8 hr to a toddler who weighs 20 kg. The recommended dosage range is 20 to 25 mg/ kg/day. Which of the following actions by the nurse is appropriate?
Explanation
To calculate the recommended dosage range for the toddler and compare it to the prescribed dose, we'll follow these steps:
Step 1: Calculate the recommended minimum daily dose:
Recommended Minimum Daily Dose = 20 mg/kg/day x 20 kg
Recommended Minimum Daily Dose = 400 mg/day
Step 2: Calculate the recommended maximum daily dose:
Recommended Maximum Daily Dose = 25 mg/kg/day x 20 kg
Recommended Maximum Daily Dose = 500 mg/day
Step 3: Calculate the prescribed daily dose:
Prescribed Daily Dose = 100 mg/dose x 3 doses/day
Prescribed Daily Dose = 300 mg/day
Step 4: Compare the prescribed dose to the recommended dosage range:
The prescribed daily dose (300 mg/day) is below the recommended minimum daily dose (400 mg/day).
Therefore, the nurse should:
The nurse should contact the health-care provider to request a dosage adjustment.
A nurse is preparing to administer levothyroxine 100 mcg PO daily. Available is levothyroxine 50 mcg tablets. How many tablets should the nurse administer daily? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
To calculate the number of tablets needed, we'll set up a proportion:
x tablets / 100 mcg = 1 tablet / 50 mcg
Cross-multiplying:
50x = 100
Solving for x:
x = 100 / 50
x = 2
Therefore, the nurse should administer 2 tablets of levothyroxine daily.
A nurse is preparing to administer digoxin 0.25 mg PO daily. The amount available is digoxin 0.125 mg tablets. How many tablets 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
To calculate the number of tablets needed, we'll set up a proportion:
x tablets / 0.25 mg = 1 tablet / 0.125 mg
Cross-multiplying:
0.125x = 0.25
Solving for x:
x = 0.25 / 0.125
x = 2
Therefore, the nurse should administer 2 tablets of digoxin daily.
A nurse is caring for a client who is postoperative following an appendectomy and is prescribed Ds lactated Ringer's at 150 mL/hr by continuous IV infusion for 12 hr. The drop factor of the manual IV tubing is 20 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
To calculate the gtt/min for the IV infusion, we'll follow these steps:
Step 1: Calculate the total volume to be infused:
Total Volume (mL) = Infusion Rate (mL/hour) x Infusion Time (hours)
Total Volume = 150 mL/hour x 12 hours
Total Volume = 1800 mL
Step 2: Calculate the total number of drops:
Total Drops = Total Volume (mL) x Drop Factor (gtt/mL)
Total Drops = 1800 mL x 20 gtt/mL
Total Drops = 36000 gtt
Step 3: Calculate the drops per minute:
Drops per Minute = Total Drops / Infusion Time (minutes)
Drops per Minute = 36000 gtt / (12 hours x 60 minutes/hour)
Drops per Minute = 36000 gtt / 720 minutes
Drops per Minute = 50 gtt/min
Therefore, the nurse should set the manual IV infusion to deliver 50 gtt/min.
A nurse is preparing to administer potassium chloride 20 mEq suspension PO daily. The amount available is potassium chloride suspension 10 mEq/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth/whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
To calculate the volume of potassium chloride to be administered, we can use the following formula:
Volume (mL) = Desired Dose (mEq) / Concentration (mEq/mL)
Plugging in the given values:
Volume (mL) = 20 mEq / 10 mEq/mL
Volume (mL) = 2 mL
Therefore, the nurse should administer 2 mL of potassium chloride suspension.
You just viewed 10 questions out of the 25 questions on the ATI Medication Calculation Competency Exam Exam. Subscribe to our Premium Package to obtain access on all the questions and have unlimited access on all Exams. Subscribe Now
