# Dosage Calculations

Posted

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Hi,

Some of the info you don't use. You need to do the conversion lbs to kg as the problem states 0.02 mg per kg per 24 hours.

Patient weighs 35lbs so divide by 2.2 to get kg = 15.9

Now take 0.02 mg multiply by the 15.9 = .318

It is asking for dose b.i.d so divide .318 by 2= .159

Round to .16

I use one formula for all of my math calc and found this to be the easiest. Remember you are always gonna solve for the unknown, so for drips this is what you do

120 ml = ml

------ -------

60 min gtt

cross out the ml and then you have the gtt/min.

60 min = 120 gtt

60 min = 120 gtt

-------

60 min

= 2 gtt/min

I hope this helps

Specializes in ORTHOPAEDICS-CERTIFIED SINCE 89. Has 30 years experience.

The problem with using aouvdopios grains, minims, ets is there is a gap in the numbers. Grains can be 60. 62 or 65 mg. Miniims can be 15 or 16 drops. The you have those silly oz, scruples, etc. With the funny emblems; i wish they would just fly away never to be seen.

Thanks! I am gonna need all of the help that I can get.

Specializes in Practical nursing.