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No.

1 : A patient is ordered a continuous heparin infusion at 16 units/kg/hr. The patient weighs 1761bs. Heparin is supplied in 50000 units/500mL. At what rate will the nurse set the pump?

Hint : Convert weight to kg, calculate dose, then divide by concentration.

Correct Answers:

12.8

Rationale :

176 lbs ÷ 2.2 = 80 kg 16 units × 80 kg = 1,280 units/hr 50,000 units ÷ 500 mL = 100 units/mL 1,280 ÷ 100 = 12.8 mL/hr

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2 : A patient is ordered medication 100units/kg SQ. The medication is supplied in 10000 units/mL The patient weighs 220 lbs. What should the nurse administer?

Hint : Always convert pounds to kilograms first.

Correct Answers:

Rationale :

220 lbs ÷ 2.2 = 100 kg 100 units × 100 kg = 10,000 units 10,000 ÷ 10,000 units/mL = 1 mL

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3 : A nurse is calculating the intake of a client during the past 9 hrs. The client's intake includes lactated Ringer's IV at 150ml/hr, cefazolin 2g IV intermittent bolus in 100ml of 0.9% sodium chloride, two units of packed RBCs of 275mI and 250ml, two IV infusions of 250ml 0.9% sodium chloride, Ranitidine 50mg IV intermittent bolus in 50ml dextrose 5% in water. How many ml of intake should the nurse record?

Hint : Add all IV fluids, medications, and boluses.

Correct Answers:

2525

Rationale :

LR @ 150 mL/hr × 9 hr = 1350 mL Cefazolin: 100 mL RBCs: 275 + 250 = 525 mL Two 0.9% NaCl boluses = 2 × 250 = 500 mL Ranitidine = 50 mL Total: 1350 + 100 + 525 + 500 + 50 = 2525 mL

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4 : The doctor orders medication S2.5 mg/kg/day in two divided doses. Medication S is supplied 40mg/mL. The patient weighs 121 lbs. What will 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.

Hint : the correct prescription should be 2.5 mg/kg/day, not 52.5.

Correct Answers:

Rationale :

1.7 mL × 40 mg/mL = 68 mg per dose 68 mg × 2 doses = 136 mg/day 136 mg/day ÷ 55 kg = ~2.5 mg/kg/day

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5 : A nurse is caring for a child who is on a clear liquid diet. At lunch, the child consumed 1/2 a cup of juice, 3 oz of gelatine, 1 oz of an ice pop and 20 mL ginger ale. How many mL should the nurse record as the child's fluid intake?

Hint : 1 oz = 30 mL; include all oral fluids.

Correct Answers:

Rationale :

½ cup = 4 oz = 120 mL 3 oz gelatin = 90 mL 1 oz ice pop = 30 mL 20 mL ginger ale Total: 120 + 90 + 30 + 20 = 260 mL

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6 : A patient is ordered 40 units/kg IV bolus of Heparin. The patient weighs 154 lbs. Heparin is supplied 25000 units/250mL. How many mL will the nurse administer?

Hint : Use proportional conversion from units to volume.

Correct Answers:

Rationale :

154 lbs ÷ 2.2 = 70 kg 70 × 40 = 2,800 units 25,000 units ÷ 250 mL = 100 units/mL 2,800 ÷ 100 = 28 mL

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7 : A patient is to receive 1500mg of an anti-infective agent IV. Pharmacy sends a vial with instructions to reconstitute with enough sterile water to yield a concentration of 1 gm/10 mL. After withdrawing the required dose from the via instructions state to further dilute the medication with 100mL of NS and infuse over one hour At what rate will the nurse set the IV pump?

Hint : Total volume includes both reconstituted drug and diluent.

Correct Answers:

Rationale :

1500 mg = 1.5 g 1.5 g × (10 mL/g) = 15 mL 15 mL + 100 mL = 115 mL total Infuse over 1 hr → rate = 115 mL/hr

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8 : A client is to receive antibiotics 1 units IV. Package instructions are to mix the medication with enough sterile water to yield a concentration of 250,000 units per 4mL. After withdrawing the required dose from the vial, package instruction are to further dilute in 100mL of IV fluid and run it over 1 hour. At what rate should the nurse set the IV pump?

Hint : Add drawn volume to diluent to get total infusion volume.

Correct Answers:

Rationale :

1,000,000 ÷ 250,000 = 4 × 4 mL = 16 mL drawn 16 mL + 100 mL = 116 mL Infuse over 1 hr = 116 mL/hr

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9 : A nurse is preparing to administer antibiotics 15mg/kg/day divided equally every 12 hrs. The client weighs 1581bs. How many mg should the nurse administer with each dose?Round of to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.

Hint : Round to nearest whole number when instructed.

Correct Answers:

Rationale :

158 lbs ÷ 2.2 = 71.8 kg 15 × 71.8 = 1,077 mg/day ÷ 2 = 538.5 ≈ 538 mg per dose

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10 : A patient is ordered a continuous heparin infusion 18 units/kg/hr. The patient weighs 220 lbs. The medication is supplied as 25000 units/250mL. At what rate should the nurse set the pump?

Hint : Same formula as earlier heparin question.

Correct Answers:

Rationale :

220 ÷ 2.2 = 100 kg 18 × 100 = 1,800 units/hr 25,000 ÷ 250 = 100 units/mL 1,800 ÷ 100 = 18 mL/hr

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Total Questions: 10

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RN Dosage Calculation N200 Re-take

No.

1 : A patient is ordered a continuous heparin infusion at 16 units/kg/hr. The patient weighs 1761bs. Heparin is supplied in 50000 units/500mL. At what rate will the nurse set the pump?

2 : A patient is ordered medication 100units/kg SQ. The medication is supplied in 10000 units/mL The patient weighs 220 lbs. What should the nurse administer?

4 : The doctor orders medication S2.5 mg/kg/day in two divided doses. Medication S is supplied 40mg/mL. The patient weighs 121 lbs. What will 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.

5 : A nurse is caring for a child who is on a clear liquid diet. At lunch, the child consumed 1/2 a cup of juice, 3 oz of gelatine, 1 oz of an ice pop and 20 mL ginger ale. How many mL should the nurse record as the child's fluid intake?

6 : A patient is ordered 40 units/kg IV bolus of Heparin. The patient weighs 154 lbs. Heparin is supplied 25000 units/250mL. How many mL will the nurse administer?

9 : A nurse is preparing to administer antibiotics 15mg/kg/day divided equally every 12 hrs. The client weighs 1581bs. How many mg should the nurse administer with each dose?Round of to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.

10 : A patient is ordered a continuous heparin infusion 18 units/kg/hr. The patient weighs 220 lbs. The medication is supplied as 25000 units/250mL. At what rate should the nurse set the pump?

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