A patient with deep vein thrombosis has heparin ordered. Heparin 25,000 units in 250 mL D5W infuses at a rate of 12 mL/hr from 9:00 a.m. to 11:00 a.m. and 10 mL/hr from 11:00 a.m. to 2:00 p.m.
What is the total amount of heparin, in units, that the patient received from 9:00 a.m. to 2:00 p.m.?

5400 units

6800 units

7200 units

8900 units

Answer and Explanation

The Correct Answer is A

To calculate the total amount of heparin, we need to multiply the infusion rate by the time and then by the concentration of heparin in the IV bag. From 9:00 a.m. to 11:00 a.m., the infusion rate was 12 mL/hr, so the amount of heparin infused in this period was 12 mL/hr x 2 hours x 100 units/mL = 2400 units.

From 11:00 a.m. to 2:00 p.m., the infusion rate was 10 mL/hr, so the amount of heparin infused in this period was 10 mL/hr x 3 hours x 100 units/mL = 3000 units. The total amount of heparin infused from 9:00 a.m. to 2:00 p.m. was 2400 units + 3000 units = 5400 units.

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Correct Answer is B

Explanation

To calculate the flow rate in mL/hr for a continuous infusion, we need to divide the total volume to be infused by the total time of infusion, and then convert the units as necessary.

In this case, the total volume is 2.5 L, which is equivalent to 2500 mL (1 L = 1000 mL), and the total time is 15 hours.

Flow rate = Total volume to be infused / Total time of infusion Flow rate = 2500 mL / 15 hours

Flow rate = 166.67 mL/hr

Therefore, the flow rate for continuous infusion of 0.9% sodium chloride solution in this case is 166.67 mL/hr.

A. 21 B. 31 C. 52 D. 62

Correct Answer is B

Explanation

The correct answer is choice B. 31. To find the number of bottles required, use the formula: (dose x frequency x duration) / (bottle size x bottle concentration). In this case, (4 mg/kg x 43 kg x 3 times/day x 6 days) / (100 mg/bottle) = 30.96 bottles. Round up to the nearest whole number to get 31 bottles.

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A patient with deep vein thrombosis has heparin ordered. Heparin 25,000 units in 250 mL D5W infuses at a rate of 12 mL/hr from 9:00 a.m. to 11:00 a.m. and 10 mL/hr from 11:00 a.m. to 2:00 p.m. What is the total amount of heparin, in units, that the patient received from 9:00 a.m. to 2:00 p.m.?

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Naxlex Comprehensive Predictor Exams

A physician gives the following order: "Infuse 0.9% sodium chloride solution, 2.5 L over 15 hours." What is the mL/hr flow rate for continuous infusion?

Correct Answer is B

Explanation

A client diagnosed with tuberculosis is prescribed rifampin, 4 mg/kg. 8 hourly for 6 days. The client weighs 43 kg. How many 100 mg bottles of rifampin will be required for this client? Round your answer to the nearest whole number.

Correct Answer is B

Explanation

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A patient with deep vein thrombosis has heparin ordered. Heparin 25,000 units in 250 mL D5W infuses at a rate of 12 mL/hr from 9:00 a.m. to 11:00 a.m. and 10 mL/hr from 11:00 a.m. to 2:00 p.m.
What is the total amount of heparin, in units, that the patient received from 9:00 a.m. to 2:00 p.m.?