How do you solve (bonus practice quiz 7) #17

by anonymus

how do you solve this one?
You receive an order for 250 mg of Aminophylline in normal saline (total volume 500 ml). The patient weighs 110 lb. The Aminophylline is to be administered at a dose of 0.4 mg per kg per hour. Aminophylline Injection is supplied in 10 mL 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?

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How do you solve (bonus practice quiz 7) #17

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Jan 29, 2011
 RE:
by: Anonymous

110 LBS/ 2.2 LBS = 50 KG
50 KG * 0.4 mg / kg / hr = 20 mg / hr
250 mg / 20 mg / hr = 12.5 hr
12.5 hr * 60 min / hr = 750 mins
500 mL * 60 gtts / mL = 30000 gtts
30000 gtts / 750 mins = 40 gtts / min
Jan 29, 2011
 AMSWER FOR #17 BONUS QUIZ 7
by: ERICA

At first, you have to find the total dose that patient needs per hr:
110 lbs/2.2 lbs= 50 kg
50kg*0.4mg/kg/hr= 20 mg/hr

And then, you find the total drops need in 500ml volume:
500mL*60gtts/mL= 30000gtts

The hours needed for desirable volume to run out:
250mg/20mg/hr= 12.5 hr
Convert it into minute:
12.5hr*60mins/hr = 750 mins

Your answer is : 30000gtts/750mins = 40gtts/min
Hope it will help!
Jan 17, 2011
 How to solve
by: Anonymous

I am also wondering how to go about solving this problem. Number 17 of bonus practice quiz 7. Any help would be appreciated!

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