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The healthcare provider prescribes heparin 1,000 units subcutaneously twice a day. The available vial is labeled, "Heparin Sodium Injection 2,000 units/2 mL." How many mL should the nurse administer
0.5 mL
1 mL
1.5 mL
2 mL
Correct Answer B: 1 mL
Explanation:
The vial contains 2,000 units in 2 mL, which means:
2,000 units ÷ 2 mL = 1,000 units per mL
The prescribed dose is 1,000 units, so:
1,000 units ÷ 1,000 units/mL = 1 mL
Why the Other Options Are Incorrect:
A. 0.5 mL
This would deliver only 500 units, which is half the prescribed dose.
C. 1.5 mL
This would provide 1,500 units, exceeding the ordered amount.
D. 2 mL
This would deliver 2,000 units—double the correct dose and potentially harmful.
A client is receiving a secondary infusion of azithromycin 500 mg in 500 mL of normal saline (NS) to be infused over 2 hours. How many mL/hour should the nurse program the infusion pump
200 mL/hr
225 mL/hr
250 mL/hr
275 mL/hr
Correct Answer C: 250 mL/hr
Explanation:
To calculate the rate for infusion:
Total volume ÷ Time = mL/hour
500 mL ÷ 2 hours = 250 mL/hr
Why the Other Options Are Incorrect:
A. 200 mL/hr
Would take 2.5 hours to infuse—longer than prescribed.
B. 225 mL/hr
Would take about 2.2 hours—slower than prescribed.
D. 275 mL/hr
Would complete the infusion in under 2 hours—faster than ordered, possibly increasing risk of side effects.
A continuous infusion of heparin 10 units/kg/hour is prescribed for a client with deep vein thrombosis (DVT) who weighs 165 pounds. The IV bag is labeled Heparin Sodium 25,000 units in 5% Dextrose Injection 500 mL. The nurse should program the infusion pump to deliver how many mL/hour
12 mL/hr
18 mL/hr
15 mL/hr
20 mL/hr
Correct Answer C: 15 mL/hr
Let’s calculate it step by step:
Step 1: Convert weight to kilograms
165 lb ÷ 2.2 = 75 kg
Step 2: Calculate prescribed dose
10 units/kg/hour × 75 kg = 750 units/hour
Step 3: Determine the concentration of the IV solution
25,000 units ÷ 500 mL = 50 units/mL
Step 4: Calculate mL/hour to deliver 750 units/hour
750 units ÷ 50 units/mL = 15 mL/hour
Why the Other Options Are Incorrect:
A. 12 mL/hr
Delivers only 600 units/hr—underdosing the client.
B. 18 mL/hr
This is the correct dose and is not incorrect.
D. 20 mL/hr
Delivers 1,000 units/hr—exceeds the prescribed amount.
The healthcare provider prescribes the standard heparin protocol for a client who weighs 95 kg and is diagnosed with a deep vein thrombosis. The loading dose is an IV bolus of 80 units/kg. Heparin is available in vials of 5,000 units/mL. How many mL of heparin should the nurse administer
1.2 mL
1.4 mL
1.5 mL
1.6 mL
Correct Answer C: 1.5 mL
Explanation:
Step 1: Calculate the total units needed
80 units/kg × 95 kg = 7,600 units
Step 2: Determine mL to administer using the available concentration
7,600 units ÷ 5,000 units/mL = 1.52 mL, rounded to the nearest tenth = 1.5 mL
Why the Other Options Are Incorrect:
A. 1.2 mL
Delivers only 6,000 units—underdosing the client.
B. 1.4 mL
Delivers 7,000 units—still short of the prescribed dose.
D. 1.6 mL
Delivers 8,000 units—exceeds the ordered 7,600 units, risking over-anticoagulation.
The healthcare provider prescribes 0.9% normal saline intravenous (IV) to infuse at a keep-open rate of 70 mL per hour. The drop factor is 15 drops per mL. The nurse should regulate the infusion to administer how many drops per minute
16 gtt/min
18 gtt/min
20 gtt/min
22 gtt/min
Correct Answer B: 18 gtt/min
Explanation:
70 mL/hr × 15 gtt/mL = 1,050 drops/hr
1,050 ÷ 60 = 17.5 gtt/min, rounded to 18 gtt/min
Why the Other Options Are Incorrect:
A. 16 gtt/min
Would deliver only 64 mL/hr—less than the prescribed rate.
C. 20 gtt/min
Would deliver 80 mL/hr—faster than ordered.
D. 22 gtt/min
Would infuse 88 mL/hr—too fast for a keep-open rate.
At 1530 the nurse observes 550 mL of fluid is yet to be infused for a client receiving 1,000 mL dextrose 5% and 0.225% sodium chloride, USP at 88 mL/hour. At what time should the nurse calculate the fluid will be infused based on the 24-hour clock
2130
2200
2145
2230
Correct Answer C: 2145
Explanation:
To determine the infusion completion time:
Volume ÷ Rate = Time
550 mL ÷ 88 mL/hr = 6.25 hours
0.25 hours × 60 = 15 minutes
6.25 hours = 6 hours and 15 minutes
1530 + 6 hours = 2130
2130 + 15 minutes = 2145
Why the Other Options Are Incorrect:
A. 2130
This accounts for only 6 hours of infusion time, missing the additional 15 minutes.
B. 2200
This would mean 6 hours and 30 minutes of infusion time, longer than actually required.
D. 2230
This would assume an infusion time of 7 hours, which is almost an hour longer than needed.
A child who weighs 42 kg receives a prescription for methylprednisolone succinate 1.5 mg/kg/day IV in divided doses every 6 hours. The medication is available in "Methylprednisolone succinate 40 mg/mL vials." How many mL should the nurse administer with each dose
0.3 mL
0.4 mL
0.5 mL
V0.6 mL
Correct Answer B: 0.4 mL
Explanation:
1.5 mg/kg/day × 42 kg = 63 mg/day
63 mg/day ÷ 4 = 15.75 mg per dose
15.75 mg ÷ 40 mg/mL = 0.39375 mL
Rounded to the nearest tenth = 0.4 mL
Why the Other Options Are Incorrect:
A. 0.3 mL
Delivers only 12 mg—less than the prescribed dose.
C. 0.5 mL
Delivers 20 mg—more than prescribed.
D. 0.6 mL
Delivers 24 mg—significantly over the ordered amount per dose.
The healthcare provider prescribed 2 liters of 5% dextrose in water (D5W) to infuse in 24 hours. The IV administration set delivers 15 gtt/mL. How many mL/hour should the nurse program the infusion pump
75 mL/hr
83 mL/hr
100 mL/hr
125 mL/hr
Correct Answer B: 83 mL/hr
Explanation:
Convert the total volume from liters to milliliters:
2 liters = 2,000 mL
Then divide by the total infusion time:
2,000 mL ÷ 24 hr = 83.33 mL/hr, rounded to 83 mL/hr
Note: Since the nurse is using an infusion pump, the drop factor (15 gtt/mL) is not used in the calculation.
Why the Other Options Are Incorrect:
A. 75 mL/hr
This would only deliver 1,800 mL in 24 hours, which is less than prescribed.
C. 100 mL/hr
This would deliver 2,400 mL in 24 hours, exceeding the prescribed 2,000 mL.
D. 125 mL/hr
This rate would infuse 3,000 mL in 24 hours—50% more than ordered, which could lead to fluid overload.
A 4-year-old is admitted with croup and receives a prescription for a single dose of dexamethasone 0.6 mg/kg IM. The child weighs 35 pounds. How many mg should the nurse administer
8 mg
10 mg
9 mg
11 mg
Correct Answer B: 10 mg
Explanation:
Step 1: Convert weight to kilograms
35 lb ÷ 2.2 = 15.91 kg
Step 2: Multiply by prescribed dose
0.6 mg/kg × 15.91 kg = 9.55 mg
Step 3: Round to the nearest whole number
9.55 mg rounds to 10 mg
Why the Other Options Are Incorrect:
A. 8 mg
Would underdose the child and not meet the required therapeutic level.
C. 10 mg
This is the correct dose based on rounding and is not incorrect.
D. 11 mg
Would exceed the recommended dose based on weight.
. The healthcare provider prescribes one liter of 1/4 strength saline in 5% dextrose solution (D5 1/4 NS) to infuse at a keep-open rate over 24 hours. The IV administration set delivers 15 gtt/mL. The nurse should regulate the infusion pump to deliver how many mL/hr
38 mL/hr
42 mL/hr
40 mL/hr
50 mL/hr
Correct Answer B: 42 mL/hr
Explanation:
Step 1: Convert liters to milliliters
1 liter = 1,000 mL
Step 2: Divide total volume by time in hours
1,000 mL ÷ 24 hr = 41.67 mL/hr, rounded to the nearest whole number = 42 mL/hr
Note: Since the question asks for how many mL/hr to set on the infusion pump, the drop factor (15 gtt/mL) is not needed here.
Why the Other Options Are Incorrect:
A. 38 mL/hr
Would deliver only 912 mL in 24 hours, which is less than the ordered volume.
C. 40 mL/hr
This is the correct answer and is not incorrect.
D. 50 mL/hr
Would infuse 1,200 mL in 24 hours, exceeding the prescribed 1,000 mL.
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