Question

NoWaNrN, ASN, RN · Dec 23, 2007

you have to change the 750 bc you cannot change what you have on hand.

mp17 · Dec 23, 2007

Thanks, you were a big help

peridotgirl · Dec 23, 2007

Hi, everyone
I have a math question, If you have 750mg ordered q 4 hours and available 1gram per 50ml, how do you know which to change, the mg or grams?

change the milligrams to grams becuase you cannot change what you have on hand. so change the 750 mg to grams

agldragonRN · Dec 24, 2007

you have to change the 750 bc you cannot change what you have on hand.

change the milligrams to grams becuase you cannot change what you have on hand. so change the 750 mg to grams

not really. i would rather change the gram to mg. it is much easier to work with whole numbers than decimals. plus, in this problem you will be administering meds in ml not mg, so yes you can definitely change the grams to mg because what you have on hand is in ml not grams.

for example, this is how i would do this

1. convert 1 g to 1000 mg

2. then i would do the ratio and proportion

= (750 mg / 1000 mg) x 50 ml

= (3/4) x 50 ml

= (3/2) x 25 ml

= 75/2

= 37.5 ml (this is how much you would give)

there is nothing wrong with how jjt and peridotgirl would tackle the problem. i just want my numbers to be whole so they are easier to work with.

you will have the same answer but i think whole numbers are easier to work with compare to

(0.75 g / 1 g ) x 50 ml

p.s. my instructor always says always work with whole numbers.

ofcourse if you use the calculator, it does not matter.

i am not allowed to use calculator at school.

angel

peridotgirl · Dec 24, 2007

not really. i would rather change the gram to mg. it is much easier to work with whole numbers than decimals. plus, in this problem you will be administering meds in ml not mg, so yes you can definitely change the grams to mg because what you have on hand is in ml not grams.
for example, this is how i would do this
1. convert 1 g to 1000 mg
2. then i would do the ratio and proportion
= (750 mg / 1000 mg) x 50 ml
= (3/4) x 50 ml
= (3/2) x 25 ml
= 75/2
= 37.5 ml (this is how much you would give)
there is nothing wrong with how jjt and peridotgirl would tackle the problem. i just want my numbers to be whole so they are easier to work with.
you will have the same answer but i think whole numbers are easier to work with compare to
(0.75 g / 1 g ) x 50 ml
p.s. my instructor always says always work with whole numbers.
ofcourse if you use the calculator, it does not matter.
i am not allowed to use calculator at school.
angel

true true.. i never thought about i that way. thanks!

agldragonRN · Dec 25, 2007

true true.. i never thought about i that way. thanks!

yup. no problem. anytime!

happy holidays!!

angel