Could anyone catch what I did wrong on this math problem?

I took a med test but failed by 2 questions today. I'm wondering if someone could help me out.

I recall the question was asking about a medication that is supposed to run 200 mL over 1 hour and 20 minutes. Drip factor is 15 gtt/mL.

Basically, what I did was this:

200mL/hr x 15 gtt/mL







60 minutes
= 50 gtt/min

However, I noticed I missed the 20 minutes so I think this is what I should have got:

200mL/1.2 hr x 15 gtt/mL







60 minutes
=42 gtt/min

That 20 minutes made a big deal right there. Am I doing this correctly?
You would do 200mL/80minutes x 15 = 37.5 gtt/minIt's always mL/time (in minutes) x drop factor

Yikes, can't believe I didn't see that. Thanks!!

20 minutes is not 0.2 hr. There are 60 minutes in an hour so 20 minutes is 1/3 (or 0.3333) of an hour. But, as the above poster said, use your time in minutes from the beginning and you won't have to worry about that.

Not even close.The formula is Volume to be infused * Drip Factor of TubingTime in Minutes to Infuse OverFor your problem200mL * 15drops/mL80 minutes= 37.5 drops/min and you round that up to 38 drops/min

Quote from J-SwishI took a med test but failed by 2 questions today. I'm wondering if someone could help me out. I recall the question was asking about a medication that is supposed to run 200 mL over 1 hour and 20 minutes. Drip factor is 15 gtt/mL. Basically, what I did was this:200mL/hr x 15 gtt/mL





60 minutes= 50 gtt/min