Question

13. When medications are ordered based on weight (kg), what are the steps you need to take to solve the problem? (example: mcg/kg/minute) 1) convert no kg 14. The doctor orders 1000 ml bag of IV Normal Saline to infuse at a rate of 50 ml/hr. How long will it take for the IV bag to completely infuse? 1000m x Som 15. The doctor orders a Heparin infusion to be started at 18 units/kg/hour. The patient weighs 130 lbs. You're supplied with a 500 ml bag of Heparin that reads 25,000 units/500mL. what is patient weight in kg? what is the ordered (desired) dose for this patient? What is the pump rate? How long will it take for full 500 ml bag to be given? 16. The doctor orders a Dobutamine infusion to be started at 10 mcg/kg/min. The patient weighs 180 lbs. You're supplied with a 250 ml bag of Dobutamine that reads 2 mg/mL. what is the IV pump rate? 17. How long will it take for the Dobutamine infusion to complete (have to change the bag)? 18. The order is to Infuse 1500 mL of Lactated Ringer's over 12 hours. You have tubing with Drip factor of 15 gttmL. 19. Order: 2L of D5 1/2 Normal Saline with 50 meq Potassium Chloride over 48 hours. Drip factor: 15 gtt/mL. 20. Order 1L of D5 to infuse over 5 hours. What is the IV pump rate?

Answer 1

13.

When medication ordered is based on weight. Ex mcg/kg/min

Then you have to multiple mcg into kg, the result will be mcg per minute.

14.

Order dose - 1000ml of NS infuse at the rate of 50ml/hr

1000ml $\div$ 50 = 20 hours

Answer - It takes 20hours to infuse the total solution.

15.

Order dose - 18 units/kg/hr

Patients weights 130 lbs

Supplied bag contains 500ml/25,000 units

130 lbs = 59 kg (1 kg = 2.2 lbs)

Answer - Patients weights 59kg

Desire dose will be

$18 units/kg \times 59 kg = 1062 units/hour$

Answer - Desire dose will be 1062 units per hour.

The pump rate will be

$500 ml\div 25,000units\times 1062 units/hour = 21.24ml$

Answer - The pump rate will be 21.24ml per hour

Total volume will be finished in

$25,000 units\div 1062 units/60 min\times 60 min=1412 min$(23 hours 32 minutes)

Answer - it will take 23 hours and 32 minutes to finish this bag.

16.

Order dose - Dobutamine 10mcg/kg/min

Patient weight 180 lbs (81.8 kg).

Supplied quantity 2mg/ml

Desire dose will be

10mcg/kg x 81.8kg = 818mcg/min

818mcg/min $\times$ 60 min = 49,080 mcg

49,080 mcg = 49.08 mg (1000 mcg = 1 mg)

Supplied quantity 2mg/ml

$49.08mg\div 2mg/ml = 24.54ml/h$

Answer - The pump rate will be 24.54 ml per hour.