IV Flow Rates Quiz 2

1. A physician orders a patient to receive 4 million units of ampicillin in a 1000 mL bag of IV solution to be infused over 6 hours. How many mL of a solution will the patient receive per hour?

166.7 mL/hour

666.8 mL/hour

122.5 mL/hour

129.5 mL/hour

The patient will receive 4 million units of ampicillin in a 1000 mL bag of IV solution over 6 hours. To calculate the mL of solution the patient will receive per hour, divide the total volume of solution (1000 mL) by the total time (6 hours). This gives us 166.7 mL/hour.

Explanation

The patient will receive 4 million units of ampicillin in a 1000 mL bag of IV solution over 6 hours. To calculate the mL of solution the patient will receive per hour, divide the total volume of solution (1000 mL) by the total time (6 hours). This gives us 166.7 mL/hour.

2. A patient weighing 110 lbs is to receive 5 mcg/kg/min of a IV solution containing Dopamine 600mg in 250ml D5W. The calculated IV dose rate is

1320 mg/min

0.037 mg/min

0.250 mg/min

1 mg/min

The IV dose rate is 0.250 mg/min because the patient weighs 110 lbs and the desired dose is 5 mcg/kg/min. To convert the patient's weight from pounds to kilograms, we divide by 2.2 (110 lbs / 2.2 = 50 kg). Then we multiply the patient's weight by the desired dose (50 kg * 5 mcg/kg/min = 250 mcg/min). Since 1 mg = 1000 mcg, we divide the desired dose by 1000 to convert it to milligrams (250 mcg/min / 1000 = 0.250 mg/min). Therefore, the calculated IV dose rate is 0.250 mg/min.

Explanation

The IV dose rate is 0.250 mg/min because the patient weighs 110 lbs and the desired dose is 5 mcg/kg/min. To convert the patient's weight from pounds to kilograms, we divide by 2.2 (110 lbs / 2.2 = 50 kg). Then we multiply the patient's weight by the desired dose (50 kg * 5 mcg/kg/min = 250 mcg/min). Since 1 mg = 1000 mcg, we divide the desired dose by 1000 to convert it to milligrams (250 mcg/min / 1000 = 0.250 mg/min). Therefore, the calculated IV dose rate is 0.250 mg/min.

3. A physician orders a patient to receive 4 million units of ampicillin in a 1000 mL bag of IV solution to be infused over 6 hours. What is the flow rate in mL per minute2?

2.78 mL

3.5 mL

2.78 mL/min

3.5 mL/min

The flow rate is calculated by dividing the total volume of the IV solution (1000 mL) by the time it takes to infuse (6 hours). This gives a flow rate of approximately 166.67 mL/hour. To convert this to mL/min, divide by 60 (since there are 60 minutes in an hour), resulting in a flow rate of approximately 2.78 mL/min.

Explanation

The flow rate is calculated by dividing the total volume of the IV solution (1000 mL) by the time it takes to infuse (6 hours). This gives a flow rate of approximately 166.67 mL/hour. To convert this to mL/min, divide by 60 (since there are 60 minutes in an hour), resulting in a flow rate of approximately 2.78 mL/min.

4. How many mL are in 500 L?

500000 mL

0.500 mL

0.05 mL

0.555 mL

There are 1000 milliliters (mL) in 1 liter (L). Therefore, to convert liters to milliliters, we multiply the number of liters by 1000. In this case, since we have 500 liters, we multiply 500 by 1000, which equals 500,000 milliliters (mL).

Explanation

There are 1000 milliliters (mL) in 1 liter (L). Therefore, to convert liters to milliliters, we multiply the number of liters by 1000. In this case, since we have 500 liters, we multiply 500 by 1000, which equals 500,000 milliliters (mL).

5. The patient is prescribed 720 mL of mixture over 6 hours using an infusion set device that delivers 10 gtt/mL. Determine the flow rate in drops per minute.

20 gtt/min

120 gtt/min

1200 gtt/min

2 gtt/min

The flow rate is determined by dividing the total volume of the mixture (720 mL) by the infusion time (6 hours) and multiplying by the drop factor (10 gtt/mL). This gives us (720 mL / 6 hours) * 10 gtt/mL = 1200 gtt/hour. To convert this to gtt/minute, we divide by 60 (60 minutes in an hour), resulting in a flow rate of 20 gtt/min.

Explanation

The flow rate is determined by dividing the total volume of the mixture (720 mL) by the infusion time (6 hours) and multiplying by the drop factor (10 gtt/mL). This gives us (720 mL / 6 hours) * 10 gtt/mL = 1200 gtt/hour. To convert this to gtt/minute, we divide by 60 (60 minutes in an hour), resulting in a flow rate of 20 gtt/min.

6. 1 liter of D5NS contains 5% dextrose in normal saline. How many liters would be needed to run a drip for a period of 8 hours at 125 mL/hour?

4 mL

3 mL

2 mL

1 mL

To calculate the number of liters needed to run a drip for 8 hours at 125 mL/hour, we multiply the rate of infusion (125 mL/hour) by the duration (8 hours). This gives us a total volume of 1000 mL. Since 1 liter is equal to 1000 mL, only 1 liter would be needed to run the drip for 8 hours at 125 mL/hour.

Explanation

To calculate the number of liters needed to run a drip for 8 hours at 125 mL/hour, we multiply the rate of infusion (125 mL/hour) by the duration (8 hours). This gives us a total volume of 1000 mL. Since 1 liter is equal to 1000 mL, only 1 liter would be needed to run the drip for 8 hours at 125 mL/hour.

7. A physician orders a patient to receive 4 million units of ampicillin in a 1000 mL bag of IV solution to be infused over 6 hours. How many units of ampicillin will the patient receive per minute?

333,333 u/hour

5556 u/min

5556 u/sec

333,333 u/sec

The patient will receive 5556 units of ampicillin per minute. This can be calculated by dividing the total units of ampicillin (4 million) by the total time in minutes (6 hours = 360 minutes). Thus, 4,000,000 units / 360 minutes = 5556 units per minute.

Explanation

The patient will receive 5556 units of ampicillin per minute. This can be calculated by dividing the total units of ampicillin (4 million) by the total time in minutes (6 hours = 360 minutes). Thus, 4,000,000 units / 360 minutes = 5556 units per minute.

8. You receive an order for 250mg of Aminophylline in normal saline (total volume 500mL). The patient weighs 110 lb. The Aminophylline is to be administered at a dose of 0.4 mg/kg/hr. Aminophylline Injection is supplied in 10mL vials with 25 mg/mL. The IV set to be used delivers 60gtts/ml. What will be the flow rate, in drops per minute, to administer the dose ordered?

40 gtts/min

42 gtts/min

38 gtts/min

41 gtts/min

To calculate the flow rate in drops per minute, we need to determine the total dose of Aminophylline required and the time it will take to administer it. First, we calculate the total dose by multiplying the patient's weight in kg (110 lb ÷ 2.2 = 50 kg) by the dose per kg per hour (0.4 mg/kg/hr): 50 kg × 0.4 mg/kg/hr = 20 mg/hr. Next, we convert the dose to mL/hr by dividing it by the concentration of the Aminophylline injection (25 mg/mL): 20 mg/hr ÷ 25 mg/mL = 0.8 mL/hr. Since the total volume is 500 mL, we can calculate the time it will take to administer it by dividing the total volume by the infusion rate: 500 mL ÷ 0.8 mL/hr = 625 hr. Finally, we convert hours to minutes by multiplying by 60: 625 hr × 60 min/hr = 37,500 min. To find the flow rate in drops per minute, we divide the total number of drops (37,500 min × 60 gtts/mL) by the total time in minutes: 37,500 min × 60 gtts/mL ÷ 37,500 min = 60 gtts/min. Therefore, the correct answer is 40 gtts/min.

Explanation

To calculate the flow rate in drops per minute, we need to determine the total dose of Aminophylline required and the time it will take to administer it. First, we calculate the total dose by multiplying the patient's weight in kg (110 lb ÷ 2.2 = 50 kg) by the dose per kg per hour (0.4 mg/kg/hr): 50 kg × 0.4 mg/kg/hr = 20 mg/hr. Next, we convert the dose to mL/hr by dividing it by the concentration of the Aminophylline injection (25 mg/mL): 20 mg/hr ÷ 25 mg/mL = 0.8 mL/hr. Since the total volume is 500 mL, we can calculate the time it will take to administer it by dividing the total volume by the infusion rate: 500 mL ÷ 0.8 mL/hr = 625 hr. Finally, we convert hours to minutes by multiplying by 60: 625 hr × 60 min/hr = 37,500 min. To find the flow rate in drops per minute, we divide the total number of drops (37,500 min × 60 gtts/mL) by the total time in minutes: 37,500 min × 60 gtts/mL ÷ 37,500 min = 60 gtts/min. Therefore, the correct answer is 40 gtts/min.

9. The patient is prescribed 720 mL of mixture over 6 hours using an infusion set device that delivers 10 gtt/mL. Determine the flow rate in mL per minute.

120 mL/min

1200 mL/min

12 mL/min

2 mL/min

The flow rate in mL per minute can be calculated by dividing the total volume of the mixture (720 mL) by the total time it takes to infuse (6 hours or 360 minutes). Therefore, the flow rate is 720 mL / 360 minutes = 2 mL/min.

Explanation

The flow rate in mL per minute can be calculated by dividing the total volume of the mixture (720 mL) by the total time it takes to infuse (6 hours or 360 minutes). Therefore, the flow rate is 720 mL / 360 minutes = 2 mL/min.

10. A physician orders a patient to receive 4 million units of ampicillin in a 1000 mL bag of IV solution to be infused over 6 hours. How many units of ampicillin will the patient receive per hour?

666,666 u/hour

333,333 u/hour

111,111 u/hour

None of these

The patient will receive 4 million units of ampicillin over a period of 6 hours. To find the units of ampicillin the patient will receive per hour, we divide the total units by the total hours. Therefore, the patient will receive 4 million divided by 6, which equals approximately 333,333 units of ampicillin per hour.

Explanation

The patient will receive 4 million units of ampicillin over a period of 6 hours. To find the units of ampicillin the patient will receive per hour, we divide the total units by the total hours. Therefore, the patient will receive 4 million divided by 6, which equals approximately 333,333 units of ampicillin per hour.