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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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The concentration of nitroglycerin in the IV solution is 125 mg / 500 mL = 0.25 mg/mL. Since 1 mg = 1000 mcg, the concentration can also be expressed as 0.25 mg/mL * (1000 mcg/mg) = 250 mcg/mL.
The nitroglycerin is infusing at a rate of 42 mcg/minute. To calculate the infusion rate in mL/hr, we can divide the infusion rate in mcg/min by the concentration in mcg/mL and then convert from mL/min to mL/hr: (42 mcg/min) / (250 mcg/mL) * (60 min/hr) = 10.08 mL/hr ≈ 9.6 mL/hr.
A. 6.5 mL/hr is incorrect because it is less than the calculated infusion rate.
B. 9.6 mL/hr is the correct answer.
C. 10.1 mL/hr is incorrect because it is more than the calculated infusion rate.
D. 14.8 mL/hr is incorrect because it is more than the calculated infusion rate.
Correct Answer is D
Explanation
The client is prescribed a dosage of 5 mg/kg of ipratropium every 12 hours. To calculate the appropriate daily dose for a 60 kg client, we can multiply the weight (60 kg) by the prescribed dosage (5 mg/kg):
60 kg * 5 mg/kg = 300 mg/day
The client reports taking 300 mg/day, which matches the prescribed dose. Therefore, the client is already taking the correct dose of ipratropium.
Based on this information, there is no need to double the dose (option a) or halve the dose (option b) because the client is already taking the prescribed amount.
Changing to an alternative medication (option c) would not be necessary as the client is effectively managing their asthma symptoms with the currently prescribed medication.
Thus, the appropriate instruction for the client is to continue the same dose of medication (option d) as prescribed.
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