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Dosage Calculation RN Adult Medical Surgical Proctored Assessment 3
Total Questions : 36
Showing 10 questions, Sign in for moreA nurse is preparing to administer enoxaparin 40 mg subcutaneous for prevention of deep vein thrombosis. Available is enoxaparin 100 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.)
Explanation
To calculate the dose of enoxaparin, use the formula: Dose (mg) / Concentration (mg/mL)
= Volume (mL)
Plug in the values from the question: 40 mg / 100 mg/mL = 0.4 mL
Round the answer to the nearest tenth: 0.4 mL
The nurse should administer 0.4 mL of enoxaparin subcutaneously for prevention of deep vein thrombosis.
A nurse is preparing to administer amikacin 5 mg/kg via intermittent IV bolus to a client who weighs 219 lb. Available is amikacin 10 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
Convert the client's weight from pounds to kilograms: 219 lb / 2.2 = 99.55 kg
Calculate the dose of amikacin in milligrams: 5 mg/kg x 99.55 kg = 497.75 mg
Calculate the volume of amikacin in milliliters: 497.75 mg / 10 mg/mL = 49.775 mL
Round the answer to the nearest whole number: 50 mL
The nurse should administer 50 mL of amikacin via intermittent IV bolus.
A nurse is preparing to administer calcitonin 8 units/kg IM to a client who weighs 130 lb.
Available is calcitonin 200 units/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
Convert the client's weight from pounds to kilograms: 130 lb / 2.2 = 59.09 kg
Calculate the dose of calcitonin in units: 8 units/g x 59.09 kg = 472.72 units
Calculate the volume of injection in mL: 472.72 units / 200 units/mL = 2.36 mL
Round the answer to the nearest tenth: 2.4 mL
The nurse should administer 2.4 mL of calcitonin IM to the client.
A nurse is preparing to administer lactated Ringer’s 250 mL IV to infuse over 15 min. 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, use the formula: mL/hr = (mL x drop factor) / time in minutes
In this case, mL = 250, drop factor = 60 (assuming microdrip tubing), and time = 15 minutes
Plug in the values and simplify: mL/hr = (250 x 60) / 15 - mL/hr = 1000
The nurse should set the IV pump to deliver 1000 mL/hr
A nurse is preparing to administer phenytoin extended release 300 mg PO daily. Available is phenytoin 100 mg capsules. How many capsules 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 capsules, divide the prescribed dose by the available dose: 300 mg / 100 mg = 3 capsules
The nurse should administer 3 capsules of phenytoin 100 mg each to provide the daily dose of 300 mg
A nurse is teaching a client who has a new prescriptio for sucralfate 1 g PO BID. Available is sucralfate 1 g/10 mL. How many tsp should the nurse instruct the client to self-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
To calculate the dose of sucralfate, divide the prescribed amount by the concentration of the liquid form.
For example, 1 g / (1 g/10 mL) = 10 mL
To convert milliliters to teaspoons, multiply by 0.2
For example, 10 mL x 0.2 = 2 tsp
Therefore, the nurse should instruct the client to self-administer 2 tsp of sucralfate per dose.
A nurse is preparing to administer dextrose 5% in lactated Ringer’s 2 L IV to infuse over 12 hr.
The drop factor on the manual IV tubing is 20 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.)
Explanation
To calculate the IV flow rate, use the formula: gtt/min = (volume in mL x drop factor in gtt/mL) / time in min
Plug in the given values: gtt/min = (2000 mL x 20 gtt/mL) / 720 min
Simplify and solve: gtt/min = 40000 gtt / 720 min
Divide both sides by 10: gtt/min = 4000 gtt / 72 min
Divide both sides by 4: gtt/min = 1000 gtt / 18 min
Divide both sides by 5: gtt/min = 200 gtt / 3.6 min
Divide both sides by 2: gtt/min = 100 gtt / 1.8 min
The answer is approximately 55.6 gtt/min, so round it to the nearest whole number: 56 gtt/min
A nurse is preparing to administer ceftriaxone 1 g by intermittent IV bolus over 45 min.
Available is ceftriaxone 1 g in 0.9% sodium chloride 100 mL. The drop factor on the manual I tubing is 15 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.)
Explanation
To calculate the IV flow rate, use the formula: gtt/min = (Volume x Drop factor) / Time
Plug in the values from the question: gtt/min = (100 mL x 15 gtt/mL) / 45 min
Simplify and solve: gtt/min = 1500 gtt / 45 min
Divide both sides by 45: gtt/min = 33.33 gtt/min
Round to the nearest whole number: gtt/min = 33 gtt/min
The nurse should set the IV flow rate to deliver 33 gtt/min
A nurse is preparing to administer digoxin 750 mcg IV bolus. How many mg 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
Convert mcg to mg by dividing by 1000
- 750 mcg / 1000 = 0.75 mg
Round the answer to the nearest hundredth
The nurse should administer 0.75 mg of digoxin IV bolus
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.)
Explanation
To calculate the manual IV flow rate, use the formula: gtt/min = (volume in mL x drop factor in gtt/mL) / time in min
Substitute the given values into the formula: gtt/min = (250 mL x 10 gtt/mL) / 30 min
Simplify and solve for gtt/min: gtt/min = 2500 gtt / 30 min
Divide both sides by 30: gtt/min = 83.33 gtt/min
Round the answer to the nearest whole number: gtt/min = 83 gtt/min
The nurse should set the manual IV flow rate to deliver 83 gtt/min
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