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Ati rn dosage calculation med surg Proctored exam

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Total Questions : 35

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Question 1:

A nurse is preparing to administer amoxicillin 775 mg PO. Available is amoxicillin oral suspension 400 mg/5 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.)

Answer and Explanation
Correct Answer: "10" mL

Explanation

Calculation:

  • Identify the ordered dose and available concentration

Ordered Dose: 775 mg

Available Concentration: 400 mg/5 mL

  • Calculate the volume to administer

Volume to administer = (Ordered Dose ÷ Concentration) × Volume of Concentration

Volume to administer = (775 ÷ 400) × 5

Volume to administer = 1.9375 × 5

Volume to administer ≈ 9.6875 mL

  • Round to the nearest whole number

= 10 mL


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Question 2:

A nurse is preparing to administer clindamycin 1,200 mg IV bolus over 1 hr to a client who is allergic to penicillin. Available is clindamycin 1,200 mg in dextrose 5% in water 100 mL. The drop factor on the manual IV tubing is 15 gtt/mL. The nurse should set the flow rate 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.)

Answer and Explanation
Correct Answer: "25" gtt/min

Explanation

Calculation:

  • Identify total volume, infusion time, and drop factor

Total Volume: 100 mL

Time: 1 hour = 60 minutes

Drop Factor: 15 gtt/mL

  • Calculate the flow rate

Flow Rate (gtt/min) = (Total Volume × Drop Factor) ÷ Time

Flow Rate = (100 × 15) ÷ 60

Flow Rate = 1,500 ÷ 60

= 25 gtt/min


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Question 3:

A nurse is preparing to administer cefazolin 1 g intermittent IV bolus in 0.9% sodium chloride 250 mL over 30 min. The drop factor on the manual IV tubing is 10 gtt/mL. The nurse should set the manual IV flow rate 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.)

Answer and Explanation
Correct Answer: "83" gtt/min

Explanation

Calculation:

  • Identify total volume, infusion time, and drop factor

Total Volume: 250 mL

Time: 30 minutes

Drop Factor: 10 gtt/mL

  • Calculate the flow rate

Flow Rate (gtt/min) = (Total Volume × Drop Factor) ÷ Time

Flow Rate = (250 × 10) ÷ 30

Flow Rate = 2,500 ÷ 30

Flow Rate ≈ 83.33

  • Round to the nearest whole number

= 83 gtt/min


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Question 4:

A nurse is preparing to administer penicillin G potassium 1,000,000 units intermittent IV bolus. The label on the vial indicates to reconstitute with 50 mL of sterile water to make penicillin G potassium 100,000 units/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.)

Answer and Explanation
Correct Answer: "10" mL

Explanation

Calculation:

  • Identify the ordered dose and reconstituted concentration

Ordered Dose: 1,000,000 units

Reconstituted Concentration: 100,000 units/mL

  • Calculate the volume to administer

Volume to administer = Ordered Dose ÷ Concentration

Volume to administer = 1,000,000 ÷ 100,000

= 10 mL


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Question 5:

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.)

Answer and Explanation
Correct Answer: "2500" mL

Explanation

Calculation:

  • Identify the ordered volume

Ordered Volume: 2.5 L

  • Convert liters to milliliters

1L = 1, 000 mL

2.5 L × 1,000 = 2,500 mL

= 2,500 mL


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Question 6:

A nurse is reviewing medications prescribed for a client. For which of the following prescriptions should the nurse contact the provider for clarification?

Answer and Explanation

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Question 7:

A nurse is preparing to administer prednisone 15 mg PO to a client who has rheumatoid arthritis. Available is prednisone 10 mg tablets. How many tablets should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Answer and Explanation
Correct Answer: "1.5" tablets

Explanation

Answer: 1.5 tablets

Calculation:

  • Identify the ordered dose and tablet strength

Ordered Dose: 15 mg

Tablet Strength: 10 mg per tablet

  • Calculate the number of tablets to administer

Number of Tablets = Ordered Dose ÷ Tablet Strength

Number of Tablets = 15 ÷ 10

= 1.5


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Question 8:

A nurse is preparing to administer epoetin alfa 7,000 units subcutaneous once a week to a client. Available is epoetin alfa 20,000 units/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.)

Answer and Explanation
Correct Answer: "0.35" mL

Explanation

Calculation:

  • Identify the ordered dose and available concentration

Ordered Dose: 7,000 units

Available Concentration: 20,000 units/mL

  • Calculate the volume to administer

Volume to administer = Ordered Dose ÷ Concentration

Volume to administer = 7,000 ÷ 20,000

= 0.35 mL


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Question 9:

A nurse is preparing to administer lactated Ringer's IV to infuse at 60 mL/hr. The drop factor on the manual IV tubing is 60 gtt/mL. The nurse should set the IV flow rate 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.)

Answer and Explanation
Correct Answer: "60" gtt/min

Explanation

Calculation:

  • Identify the infusion rate and drop factor

Infusion Rate: 60 mL/hr

Drop Factor: 60 gtt/mL

  • Convert infusion rate to minutes

Time: 1 hour = 60 minutes

  • Calculate the flow rate

Flow Rate (gtt/min) = (Infusion Rate × Drop Factor) ÷ Time

Flow Rate = (60 × 60) ÷ 60

Flow Rate = 3,600 ÷ 60

= 60 gtt/min


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Question 10:

A nurse is preparing to administer ceftriaxone 250 mg IM to an adult client who has a gonococcal infection. The label on the vial indicates to reconstitute each vial with sterile water 2.1 mL to yield ceftriaxone 350 mg/mL. How many mL of the reconstituted medication should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

Answer and Explanation
Correct Answer: "0.71" mL

Explanation

Calculation:

  • Identify the ordered dose and reconstituted concentration

Ordered Dose: 250 mg

Reconstituted Concentration: 350 mg/mL

  • Calculate the volume to administer

Volume to administer = Ordered Dose ÷ Concentration

Volume to administer = 250 ÷ 350

Volume to administer ≈ 0.714 mL

  • Round to the nearest hundredth

= 0.71 mL


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