Advanced order & supply iv nursing calculations

Advanced Order & Supply IV Nursing Calculations Nursing 201

These are some example advanced order & supply IV nursing calculation problems using Dimensional Analysis.

by: Jennifer Cook 2015

Advanced Order & Supply IV Nursing Calculations 2015 Advanced Order & Supply Nursing Calculations Nursing 201 1. Order: lidocaine 4 mg/min Supply: lidocaine 1 g in 500 mL D5W Flow rate: 120 mL/h 500 1 mL 1g =

240 2

4 mg min

1g 1000 2 mg

60 min 1h

1 mg 1000 1 mcg

60 min 1 hr

= 120 mL/h

2. Order: terbutaline 10 mcg/min for 30 min Supply: terbutaline 5 mg in 500 mL D5W Flow rate: 60 mL/h 500 mL 5 mg 30,000 500

10 1 mcg min

= 60 mL/h

3. Order: procainamide at 60 mg/h Supply: procainamide 1 g in 1 L D5W Flow rate: 60 mL/h 1000 mL 1000 mg (= 1 g) =

6000 100

60 mg 1h

= 60 mL/h

Jennifer Cook ~ Module B Practice Problems w/Answers

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Advanced Order & Supply IV Nursing Calculations 2015 4. Order: procainamide at 40 mL/h Supply: procainamide 1 g in 500 mL D5W Safe dosage range for this drug is 1 to 6 mg/min.

Flow rate: 1 mg/min Is ordered flow rate safe? Yes 1000 mg (= 1 g) 500 mL =

4000 3000

40 mL 1h

1h 60 min

= 1.3 mg/min or rounded down is 1 mg/min

5. Order: dobutamine 5 mcg/kg/min for client weighing 176 pounds Supply: dobutamine 250 mg in 250 mL D5W Flow rate: 24 mL/h 250 1 mL 250 50 mg =

10560 440

5 1 mcg kg/min

60 min 1h

1 mg 1000 4 mcg

176 lbs

1 kg 2.2 lbs

= 24 mL/h

6. Order: propofol at 30 mcg/kg/min for client weighing 75 kg Supply: propofol 7500 mg in 500 D5W Flow rate: 9 mL/h 500 1 mL 7500 mg

30 mcg kg/min

60 min 1h

Jennifer Cook ~ Module B Practice Problems w/Answers

1 mg 1000 2 mcg

75 kg

2

Advanced Order & Supply IV Nursing Calculations 2015 =

13500 1500

= 9 mL/h

7. Order: dopamine 400 mg in 250 mL D5W at 500 mcg/min for a client weighing 110 pounds Safe dosage range is 5 to 10 mcg/kg/min Is ordered mcg/min safe? Yes (See Below) 110 lbs

=

110 2.2

1 kg 2.2 lbs

= 50 kg

Low Dose

High Dose

5

10

đ?‘šđ?‘?đ?‘” đ?‘˜đ?‘”

/đ?‘šđ?‘–đ?‘› Ă— 50 đ?‘˜đ?‘” = 250 mcg/min

đ?‘šđ?‘?đ?‘” đ?‘˜đ?‘”

/đ?‘šđ?‘–đ?‘› Ă— 50 đ?‘˜đ?‘” = 500 mcg/min

No: The range is 250 mcg/min to 500 mcg/min.

If so, what is the flow rate? 19 mL/h

=

250 mL

500 1 mcg

60 min

1 mg

400 mg

min

1h

1000 2 mcg

15000 800

= 18.75 mL/h or rounded up 19 mL/h

8. Order: KCl at 2 mEq/h Supply: KCl 40 mEq in 1 L NS Flow rate: 50 mL/h

Jennifer Cook ~ Module B Practice Problems w/Answers

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Advanced Order & Supply IV Nursing Calculations 2015 2 mEq/h 40 mEq =

2,000 đ?‘šđ?‘™/â„Ž 40

1L

1000 mL 1L

= 50 mL/h

Refer to the following for questions 9 and 10 Order: Restrict fluids 2 L per 24 h. Primary IV NS via infusion pump. gentamicin 150 mg IVPB q. 6h in 100 mL of NS to infuse in 1 h Drop factor: 15 gtt/mL

9. IVPB flow rate: 25 gtt/min

1500 60

15 gtts

100 mL

1h

mL

1h

60 min

= 25 gtts/min

10. IV flow rate: 20 gtt/min Total Fluid = 2000 mL Patient will receive IVPB fluid q 6 h. That is 4 times (or 4 h) in 24 h, so: IVPB Fluid = 100 mL of NS x 4h = 400 mL Regular Fluid = 2000 mL – 400 mL (IVPB Fluid) = 1600 mL (Regular Fluid) Regular Fluid Infusion Time = 24 h (Total hours to infuse) – 4 h (IVPB infusion time) = 20 h to infuse the 1600 mL of Regular Fluid.

15 gtts mL =

24,000 1,200

1,600 mL 20 h

1h 60 min

= 20 gtts/min

Jennifer Cook ~ Module B Practice Problems w/Answers

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