A patient is receiving an IV of 500 mL D5W (dextrose 5% in water). How many grams (g) of dextrose are contained in this IV solution?
10 g
25 g
50 g
100 g
The Correct Answer is C
D5W is a solution that contains 5% dextrose in water. This means that for every 100 mL of solution, there are 5 g of dextrose. The patient is receiving an IV of 500 mL D5W. Therefore, the total amount of dextrose in this IV solution is (500 mL) * (5 g / 100 mL) = 25 g.
A. 10 g is incorrect because it is less than the calculated amount of dextrose.
B. 25 g is incorrect because it is half the calculated amount of dextrose.
C. 50 g is the correct answer.
D. 100 g is incorrect because it is double the calculated amount of dextrose.
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Related Questions
Correct Answer is C
Explanation
To determine the correct answer, we need to calculate the number of tablets per dose based on the prescribed dosage and the available tablet strength.
The doctor orders 0.1 mg of Synthroid (levothyroxine), and 50 mcg tablets are available.
First, we need to convert the prescribed dosage from milligrams (mg) to micrograms (mcg) to match the tablet strength:
0.1 mg = 100 mcg
Next, we need to calculate the number of tablets per dose:
Number of tablets per dose = Prescribed dosage / Tablet strength Number of tablets per dose = 100 mcg / 50 mcg
Number of tablets per dose = 2 tablets
Therefore, the correct answer is c. 2 tablets. The nurse should administer 2 tablets per dose to the patient to achieve the prescribed dosage of 0.1 mg.
Correct Answer is D
Explanation
The patient weighs 176 lb, which is equivalent to 176 lb * (1 kg / 2.2 lb) = 80 kg. The dose of Zofran for this patient is 0.15 mg/kg * 80 kg = 12 mg. The medication arrives from the pharmacy mixed in 50 mL of normal saline and is to be infused over 15 minutes. To calculate the infusion rate in mL/hr, we can divide the volume of solution by the infusion time in hours: (50 mL) / (0.25 hr) = 200 mL/hr.
A. 400 mL/hr is incorrect because it is double the calculated infusion rate.
B. 100 mL/hr is incorrect because it is half the calculated infusion rate.
C. 150 mL/hr is incorrect because it is less than the calculated infusion rate.
D. 200 mL/hr is the correct answer.
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