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1 mg/kg
a patient weighs 85 kg
therefore he needs 85 mg

the solution you are giving him has
300 mg / 3 mL

how many mL do you have to give him for 85 mg then

8.5 mL

no no, are you confused with anything i ve typed so far

m not confused i just dont understand the 85 mg in mL how do you convert this

okays the solution you administer to the patient has 300 mg for every 3 mL

you have to give him x mL such that he only get 85 mg

you can look at the ratios there 300 mg for 3 mL means
100 mg for 1 mL

which is not low enough, can you think of how to get it to 85 mg for some other mL

ok so we need to make 85mg to mL right

we arent turning mg to ml we are just trying to figure out the ratios here

ohh i c

so we cross multiply to get it right

yep

solve for x

|dw:1438112286446:dw|

you see how 1*100 =100
for the 100/1 case
then
85/x
x*100=85
so x=0.85

|dw:1438112353485:dw|

85 mg for 0.85 mL
so you need to give the patient 0.85 mL of solution

so the answer is 0.85mL?

yeah

thank you :)

welcome