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IV Calculation Flashcards

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1
Q

How is the flow rate for manually regulated IV calculated?

A

Divide the TOTAL VOLUME (100 mL) by the TOTAL TIME (2 hours), and then CONVERT the result to drops per minute using the tubing’s drop factor (15 gtt/mL).
Here: (1000 mL / 2 hours)
× (15 gtt/mL) = 7500 gtt/hour
This is the total number of drops required for the entire infusion
!! Then, DIVIDE this number by 60 (to find the number of drops per minute (since the total time was in hours):
7500/60 = 125, so the answer is:
125 drops per minute

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2
Q

Calculate the flow rate for manually
regulated IV using the drops per minute.
Ordered: 2000 mL 0.45% NS over 8 hours.
Tubing is 10 gtt/mL. Write the number only of the drops per minute.

A

63

As:
(2000/8) x 10 = 3750
3750/60 = 63 drops per minutes

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3
Q

Calculate the flow rate for manually
regulated IV using the drops per minute.
Ordered: 1500 mL 0.45% NS over 12 hours.
Tubing is 15 gtt/mL. Write the number only of the drops per minute.

A

31

As:
(1500/12) x 15
125 x 15 = 1875
1875/60 = 31.25 so 31 (closer to 31 than to 32)

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4
Q

Calculate the flow rate for manually
regulated IV using the drops per minute.
Ordered: 40 mEq KCL in 100 mL NS over 45 minutes. Tubing is 15 gtt/mL.
Write the number only of the drops per minute.

A

33

As:
Flow rate (gtt/min) = (Volume to be infused in mL / Time in minutes) × Drop factor (gtt/mL)

Data given
-Volume to be infused (VTBI): 100 mL
-Time in minutes: 45 minutes
-Drop factor: 15 gtt/mL

Flow rate (gtt/min) = (100 mL / 45 minutes) X 15 gtt/mL
= 33.33gtt/min
So the flow rate for this manually regulated IV is 33 drops per minute.
(No need to DIVIDE this by 60 as the TOTAL TIME was already in minutes and not hours !)

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5
Q

Calculate the flow rate for manually
regulated IV using the drops per minute.
Ordered: 40 mEq KCL in 100 mL NS over 40 minutes. Tubing is 20 gtt/mL.
Write the number only of the drops per minute.

A

50

As:
Flow rate (gtt/min) = (Volume to be infused in mL / Time in minutes) × Drop factor (gtt/mL)

Data given
-Volume to be infused (VTBI): 100 mL
-Time in minutes: 40 minutes
-Drop factor: 20 gtt/mL

Flow rate (gtt/min) = (100 mL / 40 minutes) X 20 gtt/mL
= 50 gtt/min
So the flow rate for this manually regulated IV is 50 drops per minute.
(No need to DIVIDE this by 60 as the TOTAL TIME was already in minutes and not hours !)

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6
Q

What is the flow rate in mL per hour:
20 mEq KCL in 50 mL NS over 30 minutes?

A

Flow rate formula:
DIVIDE the volume of the solution (50 mL) by the time it takes to infuse (30 minutes).
(You can MULTIPLY this by 60 (to convert minutes to hours) if needed by not the case here as the TT is already in min)

50/0.5 (as 30 min is 1/2 of 1h) = 100
Thus, the flow rate in mL per hour for this solution is 100mL

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7
Q

What is the flow rate in mL per hour:
20 mEq KCL in 150 mL NS over 45 minutes?

A

Flow rate formula:
DIVIDE the volume of the solution (150 mL) by the time it takes to infuse (45 minutes).
(You can MULTIPLY this by 60 (to convert minutes to hours) if needed by not the case here as the TT is already in min)

150/0.75 (as 45min is 3/4 of 1h) = 200

Therefore, the flow rate in mL per hour for this solution is 200mL

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8
Q

Ordered: 2000 mL LR over 8 hours. Find the flow rate in mL per hour.

A

Data given:
- solution: 2000mL
-TT = 8h

2000/8 = 250mL
Thus, the flow days in mL per hour is 250mL

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9
Q

Ordered: 1000 mL LR over 6 hours. Find the flow rate in mL per hour.

A

Data given:
-vol of solution: 1000
-TT: 6h

1000/6 = 166.6 so if you round it up: 167
Therefore, the flow rate in mL per hour 167mL

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10
Q

Calculate the flow rate for manually
regulated IV using the drops per minute.
Ordered: 1000 mL NS over 24 hours. Tubing is 20 gtt/mL. Write the number only of the drops per minute.

A

14

As:
Flow Rate (gtts/min) = (Volume to Infuse in gtts) / Time in minutes (ie: time in hours/60)
Data given:
Volume to infuse = 1000mL
Time in hours : 24 (24x60 = 1440min)
Tubing = 20 gtt/mL
So:
(1000*20) / 1440
20 000 / 1440 = 13.89 so 14
Thus, the flow rate for manually regulated IV using the drops per minute is 14 drops per min.

Other technique:
Flow Rate (gtts/min) =
((Solution in mL) / Time in hours) x tubing, and then result/60 to have the drops per min instead of hours
So:
(1000/24)x20 = 833.33/60 = 13.89 so 14 drops per min

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11
Q

Calculate the flow rate for manually
regulated IV using the drops per minute.
Ordered: 1500 mL NS over 12 hours. Tubing is 15 gtt/mL. Write the number only of the drops per minute.

A

31

As:
Data given:
Solution = 1500mL
Tubing = 15ggt/mL
TotaL time = 12h
So:
(1500*15)/12 =1875
1875/ 60 = 31.25 so 31 drops per min

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12
Q

What is the flow rate in mL per hour of 300 mL NS over 2 H?

A

150mL

As:
300/2 = 150 so the flow rate is 150mL per hour

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13
Q

Find the flow rate in mL per hour of 500 mL NS over 6 H

A

83

As:
500/6 = 83.33 so 83mL

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14
Q

Calculate the flow rate for manually
regulated IV using the drops per minute.
Ordered: 500 mL NS over 8 hours. Tubing is 15 gtt/mL. Write the number only of the drops per minute.

A

16 drops per min

As:
(500x15)/8 = 937.5
937.5/60 = 15.6 so 16 drops per min

Or:
(500/8) x 15 = 937.5/60 = 15.6 so 16 drops per min

Or:
Time in min = 8x60=480
(500x15)/480
= 15.6 so 16 drops per min

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15
Q

Ordered: 500 mg ampicillin in 100mL NS to infuse over 30 minutes. What is the flow rate per hour?

A

Flow rate is 200mL per hour

As:
Data Given:
Solution= 100mL
Time= 30min

So:
100/0.5 (as 30 min is 1/2 of 1h) = 200

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16
Q

Ordered: 500 mg ampicillin in 150mL NS to infuse over 45 minutes. What is the flow rate per hour?

A

200mL per hour

As:
Data given:
Solution = 150mL
Time = 45 min so 0.75

So:
150 / 0.75 = 200mL per hour

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17
Q

Find the flow rate in mL per hour for 2000 mL NS over 24 hours.

A

83

As:
Formula: divide the total volume (2000 mL) by the total time (24h)

So:
2000/24 = 83
Thus, the flow rate is 83mL per hour

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18
Q

The doctor orders Rocephin 1g IVPB q 24 hours. On the shelf in the medication room there is Rocephin 1 g in 250ml of D5W to be given over 1 hour. What is the flow rate?

A

250mL

As:
Data given:
Time= 1h
Solution = 250mL

So: volume/time = flow rate
250/1 = 250mL

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19
Q

The doctor orders 500mL of 0.45% NS with 20mEq of KCL to infuse over 8 hours. Calculate the flow rate.

A

63mL

As:
Data given:
Time= 8h
Solution = 500mL

So:
500/8 = 62.5mL BUT you have to round up so the flow rate will be 63mL

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20
Q

Doctor’s order says: 300 mL of Normal Saline to infuse over 6 hours. What is the hourly rate?

A

50mL/hr

As:
Data given:
Time = 6h
Solution = 300mL

So:
300/6 = 50mL

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21
Q

Doctor’s order says: 2 L of D5W 1/2 Normal Saline to infuse over 48 hours. What is the hourly rate

A

42mL/hr

As:
Data given:
Time = 48h
Solution = 2L so 2000mL

So:
2000/48=41.6 so 42mL

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22
Q

Doctor’s order says: 100 mL Ceftriaxone Sodium 1G to infuse over 30 minutes. What is the hourly rate?

A

200mL

As:
Data given:
Time = 30min so 0.5h
Solution = 100mL

So:
100/0.5 = 200mL

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23
Q

Doctor’s order says: 1000 mL of TPN to infuse over 36 hours. What is the hourly rate?

A

28mL

As:
Data given:
Time = 36h
Solution = 1000mL

So:
1000/36 = 27.7

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24
Q

Doctor’s order says: 0.8 L of Normal Saline to infuse over 45 minutes. What is the hourly rate?

A

1.067

As:
Data given:
Time = 45min so 0.75h
Solution = 0.8L

So:
0.8/ 0.75 = 1.066 so 1.067mL

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25
Q

Doctor’s order says: 250 mL of Vancomycin 300 mg to infuse over 80 minutes. What is the hourly rate?

A

187.5 mL/hr

As:
Data given:
Time = 80min so 1.33h
Solution = 250mL

So:
250/1.33 = 187.5mL/hr

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26
Q

Doctor’s order says: 300 mL of Packed Red Blood Cells to infuse over 4 hours. What is the hourly rate?

A

75mL/hr

As:
Data given:
Time = 4h
Solution = 300mL

So:
300/4 = 75mL

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27
Q

Doctor’s order says: 250 mL of Vancomyin to infuse over 45 minutes. What is the hourly rate?

A

333mL/hr

As:
Data given:
Time= 45min so 0.75h
Solution = 250mL

So:
250/0.75 = 333.33 so 333 mL

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28
Q

Doctor’s order says: 2,500 mL of D5 1/2 Normal Saline to infuse over 48 hours. What is the hourly rate?

A

52mL/hr

As:
Data given:
Time = 48h
Solution = 2500mL

So:
2500/48 = 52.08 so 52mL/hr

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29
Q

Doctor’s order says: 2,500 mL of D5 1/4 Normal Saline to infuse over 1 day. What is the hourly rate?

A

104mL/hr

As:
Data given:
Time = 1 day so 24h
Solution = 2500mL

So:
2500/24 = 104.2 so 104mL/hr

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30
Q

Convert 7.5h to minutes

A

7.5 x 60 = 450min
(As 450min/60 = 7.5h)

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31
Q

Convert 225 min to hours

A

225/60 = 3.75h

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32
Q

Convert 3h to minutes

A

3x60 = 180min
As 180min / 60 = 3h

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33
Q

Round 123.8 drops to the nearest whole number and use the correct unit abbreviation in the answer

A

124 gtts

34
Q

Round 0.82 drops to the nearest whole number and use the correct unit abbreviation in the answer

A

1gtt

35
Q

Round 15.25 drops to the nearest whole number and use the correct unit abbreviation in the answer

A

15 gtts

36
Q

Round 24.9 drops to the nearest whole number and use the correct unit abbreviation in the answer

A

25 gtts

37
Q

Round 35.35 drops to the nearest whole number and use the correct unit abbreviation in the answer

A

35 gtts

38
Q

As a nurse, what are the 5 steps to calculate the IV flow rate that you always need to follow ?

A

-Step 1: Write the formula with the information you are given
-Step 2: Convert hours to minutes, unless time is given in minutes
-Step 3: Divide the total volume by the time in minutes
-Step 4: Multiple the answer in step 3 by the drop factor
-Step 5: Round to the nearest whole number and write your answer in the form of gtts/min

39
Q

1500 mL IV Saline is ordered over 12 hours. Using a drop factor of 15 gtts/mL, how many drops per minute (gtts/min) need to be delivered?

A

The formula for calculating IV flow rates is:
[Total volume (mL) / time (in min) ] x drop factor (gtts/mL) = gtts/min (flow rate)

So here:
[1500/ (12x60)] x 15
= (1500 / 720) x 15
= 2.0833 x 15 = 31.25
Thus, the flow rate is 31 gtts/min

40
Q

2500 mL of a solution is ordered to be administered over 36 hours. Using a drop factor of 20 gtts/mL, what is the flow rate?

A

The formula for calculating IV flow rates is:
[Total volume (mL) / time (in min) ] x drop factor (gtts/mL) = gtts/min (flow rate)

So here:
[ 2500/ (36x60) ] x 20
=(2500 x 2,160) x20
=1,1574 x 20
= 23.14 so 23 gtts/min

41
Q

Calculate the IV flow rate for the following:
500 mL to run over 6 hours. The drop factor is 20 gtts/mL.

A

17 gtts/min

As:
Data given:
Time = 6h so 360 min
Solution = 500mL
Drop factor = 20 gtts/mL

So:
(500/600) x 20 = 16.6 so 17
The flow rate is 17 gtts/min

42
Q

Calculate the IV flow rate for the following:
1000 mL to be delivered over 12 hours. The drop factor is 15 gtts/mL.

A

21 gtts/min

As:
Data given:
Time = 12h so 720 min
Solution = 1000mL
Drop factor = 15 gtts/mL

So:
(1000/720) x 15 = 20.8 so 21
The flow rate is 21 gtts/min

43
Q

Calculate the IV flow rate for the following:
650 mL to infuse over 4 hours. The drop factor is 10 gtts/mL.

A

27 gtts/min

As:
Data given:
Time = 4h so 240 min
Solution = 650 mL
Drop factor = 10 gtts/mL

So:
(650/240) x 10 = 27.08 so 27
The flow rate is 27 gtts/min

44
Q

Calculate the IV flow rate for the following:
100 mL to be delivered over 40 minutes. The drop factor is 20 gtts/mL

A

50 gtts/min

As:
Data given:
Time = 40 min (already in min!!)
Solution = 100mL
Drop factor = 20 gtts/mL

So:
(100/40) x 20 = 50
The flow rate is 50 gtts/min

45
Q

Calculate the IV flow rate for the following:
250 mL to infuse over 2 hours. The drop factor is 15 gtts/mL

A

31 gtts/min

As:
Data given:
Time = 2h so 120 min
Solution = 250mL
Drop factor = 15 gtts/mL

So:
(250/120) x 15 = 31.25 so 31
The flow rate is 31 gtts/min

46
Q

Calculate the IV flow rate for the following:
2000 mL to run over 24 hours. The drop factor is 60 gtts/mL

A

83 gtts/min

As:
Data given:
Time = 24h so 1440 min
Solution = 2000mL
Drop factor = 60 gtts/mL

So:
(2000/1440) x 60 = 83.33 so 83
The flow rate is 83 gtts/min

47
Q

Calculate the IV flow rate for the following:
1200 mL to run over 12 hours using a microdrip infusion set.

A

100 gtts/min

As:
Data given:
Time = 12h so 720 min
Solution = 1200mL
Micro drip = 60 gtts/mL (fixed number)

So:
(1200/720) x 60 = 100
The flow rate is 100 gtts/min

48
Q

Calculate the IV flow rate for the following:
50 mL to be infused in 30 minutes with a drop factor of 15 gtts/mL

A

25 gtts/min

As:
Data given:
Time = 30 min (already in min!!!)
Solution = 50mL
Drop factor = 15 gtts/mL

So:
(50/30) x 15 = 25
The flow rate is 25 gtts/min

49
Q

Calculate the IV flow rate for the following:
650 mL to infuse in 10 hours with a blood drip factor

A

11 gtts/min

As:
Data given:
Time = 10h so 600 min
Solution = 650mL
Blood drip factor = 10 gtts/mL (fixed number)

So:
(650/600) x 10 = 10.8 so 11
The flow rate is 11 gtts/min

50
Q

Calculate the IV flow rate for the following:
800 mL to run over 6 hours using IV tubing with a drop factor of 20 gtts/mL

A

44 gtts/min

As:
Data given:
Time = 6h so 360 min
Solution = 800mL
Drop factor = 20 gtts/mL

So:
(800/360) x 20 = 44.4 so 44
The flow rate is 44 gtts/min

51
Q

Convert 6h to minutes

A

6x60 = 360min

52
Q

Convert 15 1/2 hours to min

A

15.5 x 60 = 930min

53
Q

Convert 24h to min

A

24 x 60 = 1440 min

54
Q

Convert 12 1/4 hours to min

A

12,25 x 60 = 735min

55
Q

Convert 525min to hours

A

525/60 = 8.75h

56
Q

Identify the drops per milliliter (gtts/mL) for the 3 main drop factors:
-microdrip factor
-standard drip factor
-blood drip factor

A

-Microdrip factor: 60 gtts/mL
-Standard drip factor: 15 gtts/mL
-Blood drip factor: 10 gtts/mL

57
Q

This morning, you received the following order for your patient:
Order: 480 mL D5W to infuse IV over 8 hours using tubing with a drop factor of 60 gtts/mL. After selecting the correct IV set, you calculate the flow rate:

A

60gtts/min

As:
Data given:
Time = 8h so 8x60 = 480min
Solution = 480mL
Drop factor = 60gtts/mL

So:
(480/480) x 60 = 60 gtts/min

58
Q

Continuation of the previous question:
Once you have set up the IV for the patient, you manually verify the gtts/min by counting the drops for 15 seconds and then multiplying this number by 4, because 15 seconds x 4 = 60 seconds (1 minute). You count 15 drops in 15 seconds. 15 x 4 = 60 gtts/min. Is the IV flow correct?

A

Sorry I couldn’t answer this one haha

59
Q

Sometimes you may need to calculate the rate of milliliters per hour (mL/hr) of an infusion. How can you do that?

A

Divide the total volume by the total infusion time

60
Q

Calculate the mL/hr for the following order: 1000 mL D5W with 0.45% NS to infuse in 8 hours using tubing with a drop factor of 15 gtts/mL.

A

(1000/8) = 125mL
(125/60)x15 = 31.25 so 31gtts/min

61
Q

During your 12 hour shift in the ICU today, you receive the following IV medical orders that you must set up and administer to your patients:

Dr. Rodrigo ordered 500 mL D5 1⁄2 NS to infuse in 6 h; drop factor: 20 gtts/mL. What is the flow rate?

A

28 gtts/min

As:
Data given:
Time = 6h so 6x60 = 360min
Solution = 500mL
Drop factor = 20 gtts/mL

So here:
(500/360) x 20 = 27.77 so 28

62
Q

Dr. Hermanowicz ordered 1000 ml D5W with 10 mEq KCL to infuse at 100 mL/h using tubing with a drop factor of 20 gtts/mL. The infusion was started at 7:30 a.m.
1)What is the total infusion time?
2) At what time will the infusion end?
3) What is the flow rate?

A

1) 10h
2) 4:30pm
3) 33 gtts/min

1)
100 1000
—— = ——
1h X hour
So: 100x x = 100x and 1000 x 1 = 1000
So: 100x = 1000
So: x = 1000/100
x = 10h
Thus, the total infusion time is 10h

2) 7:30am + 10h = 5:30pm

3) flow rate = 33 gtts/min
As:
Time = 10h so 600min
Solution = 1000 mL
Drop factor = 20 gtts/mL
So:
(1000/600) x 20 = 33.33 so 33 gtts/min

63
Q

Dr. Athena ordered 3 L NS IV to infuse at 125 mL/h with a drop factor of 15 gtts/mL. What is the flow rate?

A

31 gtts/min

As:
Data given:
Solution = 3L
Drop factor = 15 gtts/mL
Time ? Find infusion time:

125 3000
—— = ——
1h X hour
So: 125x x = 125x and 3000 x 1 = 3000
So: 125x = 3000
So: x = 3000/125
x = 24h
Thus, the total infusion time is 24h

So flow rate:
Time = 24h so 1440min
(3000/1440) x 15 = 31.25 so 31 gtts/min

64
Q

Dr. Duck ordered 1000 D5W to run over 10 h with microdrip tubing. What is the flow rate?

A

150 gtts/min

Data given:
Solution = 1500
Time = 10h so 600min
Micro drip = 60 gtts/mL (fixed)

So:
(1500/600) x 60 = 150 gtts/min

65
Q

Dr. Hera ordered 1000 mL of 0.9% NS to infuse in 12 hours with a drop factor of 20 gtts/mL.
1) What is the flow rate?
2)What is the rate of mL/hr for this infusion?

A

1) 28 gtts/min
2) 83 mL/hr

Data given:
Time = 12h so 720min
Solution = 1000mL
Drop factor = 20 gtts/mL

1) as:
(1000/720) x 20 = 27.7 so 28 gtts/min
Thus, the flow rate is 28 gtts/min

2) as:
1000/12 = 83 mL/hr
Thus, the rate of mL/hr is 83 mL/hr

66
Q

Dr. Hermes ordered 250 mL D5W to infuse in 4 hours using blood drip tubing. What is the flow rate?

A

10 gtts/min

As:
Data given:
Time = 4h so 240min
Solution = 250 mL
Blood drip tubing = 10 gtts/mL

So: (250/240) x 10 = 10.41
Thus flow rate 10 gtts/min

67
Q

Dr. Aphrodite ordered 500 mL of blood plasma over 4 hours at a blood drop rate of 10 gtts/mL. What is the flow rate?

A

21 gtts/min

As:
Data given:
Time = 4h so 240min
Solution = 500mL
Blood drop rate = 10 gtts/mL

So:
(500/240) x 10 = 20.83
Thus, the flow rate is 21 gtts/min

68
Q

Dr. Artemis ordered 3000 mL 0.45% NaC1 IV for 24 h with a drop factor of 15 gtts/mL.
1)What is the flow rate?
2)What is the rate of mL/hr for this infusion?
3)When there is 1000 mL left in the IV bag, how much time is remaining for the infusion?

A

1) 31 gtts/min
2) 125mL/hr
3) 8h renaming

1) as:
Data given:
Solution = 3000
Time = 24h so 1440min
Drop factor = 15 gtts/mL

So:
(3000/1440) x 15 = 31.25
Thus flow rate is 31 gtts/min

2) as:
Solution in mL/time in hours
3000/24 = 125
Thus, the rate of mL/hr for this infusion is 125mL/hr

3) as:
Solution left in IV bag/rate of mL/hr
= 1000/125 = 8 hours
Thus, 8h are remaining for this infusion

69
Q

Dr. Apollo ordered 2500 mL of NS to infuse over 20 hours with a drop factor of 20 gtts/mL.
1) What is the rate of mL/hr for this infusion?
2)What is the IV flow rate?

A

1) 125 mL/hr
2)

Data given:
Time = 20h (1200min)
Solution = 2500mL
Drop factor = 20 gtts/mL

1) as:
Formula for rate of mL/hr:
Solution/time in hours
2500/20 = 125 mL/hr
Thus, the rate of mL/hr for this infusion is 125 mL/hr

2) as:
Flow rate:
(2500/1200) x 20 = 41.6
Thus, the flow rate is 42 gtts/min

70
Q

You have been given the following IV orders during your shift today:
Ordered: 100 mL gentamicin over 30 minutes using IV tubing with a drop factor of 15 gtts/mL
What is the flow rate?

A

50gtts/min

As:
Time = 30min (already in min!!)
Solution= 100mL
Drop factor = 15 gtts/mL

So:
(100/30) x 15 = 50 gtts/min
Thus, the flow rate is 50 gtts/min

71
Q

You have been given the following IV orders during your shift today:
Ordered: 850 mL D5/0.45% NS to infuse in 6 hours. Drop factor: 15 gtts/mL
1) What is the flow rate?
2)What is the rate of mL/hr?

A

1) 32 gtts/min
2) 142 mL/hr

Data given:
Time = 6h so 360min
Solution = 850mL
Drop factor: 15 gtts/mL

1) As:
(850/360) x 15 = 35.42 so 36 gtts/min
Thus, the flow rate is 36 gtts/min

2) as:
850/6 = 141.6 so 142
Thus, the rate of mL/hr is 142mL/hr

72
Q

Ordered: 500 mL of D5W to infuse in 8 hours using microdrip tubing
What is the flow rate?

A

63 gtts/min

As:
Data given:
Time= 8h so 480min
Solution= 500mL
Microdrip tubing = 60 gtts/mL (standard number)

So:
(500/480) x 60 = 62.5 so 63 gtts/min
Thus, the flow rate is 63 gtts/min

73
Q

Ordered: 40 mEq KCL in 100 mL over 40 minutes using tubing with a drop factor of 20 gtts/mL
What is the flow rate?

A

50 gtts/min

As:
Data given:
Time= 40min
Solution= 100mL
Drop factor = 20 gtts/mL

So:
(100/40) x 20 = 50 gtts/min
Thus, the flow rate is 50 gtts/min

74
Q

Ordered: 3000 mL NS over 24 h using tubing with a drop factor of 10 gtts/mL
1)What is the flow rate?
2)What is the rate of mL/hr?

A

1) 21 gtts/min
2) 125 mL/hr

As:
Data given:
Time= 24h so 1440min
Solution= 3000mL
Drop factor = 10 gtts/mL

1) as:
(3000/1440) x 10 = 20.8 so 21 gtts/min
Thus, the flow rate is 21 gtts/min

2) as:
3000/24= 125 mL/hr
Thus, the rate of mL/hr is 125mL/hr

75
Q

Ordered: 750 mL of NS to infuse over 5 hours IV using tubing with a drop factor of 10 gtts/mL
1)What is the flow rate?
2)What is the rate of mL/hr?

A

1) 25 gtts/min
2) 150 mL/hr

As:
Data given:
Time= 5h so 300min
Solution= 750mL
Drop factor = 10 gtts/mL

1) as:
(750/300) x 10 = 25 gtts/min
Thus, the flow rate is 25 gtts/min

2) as:
750/5= 150 mL/hr
Thus, the rate of mL/hr is 150 mL/hr

76
Q

Ordered: 1000 mL of D5 1⁄2 NS to infuse IV at 200 mL/hr via tubing with a drop factor 20.
1)What is the flow rate?
2)What is the total infusion time?

A

1) 67 gtts/min
2) 5h

Data given:
Solution =100mL
Drop factor = 20 gtts/mL
Time ?? Find total infusion time:

2)
200 1000
—— = ——
1h X hour
So: 200x x = 200x and 1000 x 1 = 1000
So: 200x = 1000
So: x = 1000/200
x = 5h
Thus, the total infusion time is 5h
(So 300min)
Thus, the total infusion time is 5h

1)
As:
Time = 5h so 300min
Solution = 1000 mL
Drop factor = 20 gtts/mL
So:
(1000/300) x 20 = 66.66 so 67 gtts/min
Thus, the flow rate is 67 gtts/min

77
Q

Ordered: 1000 mL of D5W at 50 mL/hr with a drop factor of 10 gtts/mL to be started at 5:30a.m.
1)What is the flow rate?
2)What is the total infusion time?
3)What time will the infusion end?

A

1) 8 gtts/min
2) 20h
3) 1:30am

Data given:
Solution = 1000 mL
Drop factor : 10 gtts/mL
Time??? Find the total infusion time

2)
50 1000
—— = ——
1h X hour
So: 50x x = 50x and 1000 x 1 = 1000
So: 50x = 1000
So: x = 1000/50
x = 20h
Thus, the total infusion time is 20h

1)
As:
Time = 20h so 1200min
Solution = 1000 mL
Drop factor = 10 gtts/mL
So:
(1000/1200) x 10 = 8.33 so 8 gtts/min
Thus, the flow rate is 8 gtts/min

3) 5:30am + 20h = 1:30am

78
Q

Ordered: 2000 mL of D5 1⁄2 NS to run over 24h. The drop factor is 20 gtts/mL. What is the flow rate?

A

28 gtts/min

As:
Data given:
Time= 24h so 1440min
Solution = 2000 mL
Drop factor = 20 gtts/mL

So:
(2000/1440) x 20 = 27.7 so 28
Thus, the flow rate is 28 gtts/min

79
Q

At times, you receive IV orders with the rate of milliliters per hour (mL/hr) instead of the total infusion time. How can you find the total infusion time when knowing the rate of millilitres per hour?
For eg:
Order: 1000 mL to infuse at 200 mL/hr with a drop factor of 15 gtts/mL. Find the total infusion time, and then the flow rate

A

By cross multiplying

Example:
200 1000
—— = ——
1h X hour

So: 200x x = 200x and 1000 x 1 = 1000
So: 200x = 1000
So: x = 1000/200
x = 5h
Thus, the total infusion time is 5h

And then you can find the flow rate:
Data given:
Time = 5h so 300min
Solution = 1000
Drop factor = 15
So: (1000/300) x 15 = 50 gtts/min

80
Q

At times, you receive IV orders with the rate of milliliters per hour (mL/hr) instead of the total infusion time:
Order: 2500 mL to infuse at 100 mL/hr with a drop factor of 15 gtts/mL.
Find the total infusion time, and then the flow rate

A

100 2500
—— = ——
1h X hour

So: 100x x = 100x and 2500 x 1 = 2500
So: 100x = 2500
So: x = 2500/100
x = 25h
Thus, the total infusion time is 25h

And then you can find the flow rate:
Data given:
Time = 25h so 1500min
Solution = 2500
Drop factor = 15
So: (2500/1500) x 15 = 25 gtts/min

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