PLEASE HELP ME! URGENT Dosage Calc

JustBeachyNurse, LPN · Mar 14, 2014

What do you think? Show us what you think and we can HELP you solve the problem

MrChicagoRN, RN · Mar 14, 2014

I haven't calculated an IV for many years, but saw two different ways to calculate it in my head.

what do you think it may be, and how did you arrive there?

Sabr, BSN, RN · Mar 14, 2014

ok here goes

ordered= 300mg/500ml

have= 1000mg/20 ml

but since all 4 numbers are given Im having a hard time understanding how plugs into the desired over have equation.

Seun2014 · Mar 14, 2014

500/8hours=62.5

62.5/20=3.125ml

imadoll1980 · Mar 14, 2014

500mg per 10ml and want 300mg

500x=300

0.6 x 500=300

So 0.6x10=6ml I'm pretty confident 6ml would be your answer. I don't remember proper calculations we were taught in nursing school, but it makes sense to me. I always clarify every dose calculation with pharmacy. If you do a rough check of your work you can compare it to what 250mg would be which in your head you can calculate as 5ml. So 6ml sounds right.

kgh31386, BSN, MSN, RN · Mar 14, 2014

And doing it for them helped them learn how?

MrChicagoRN, RN · Mar 14, 2014

ok here goes
ordered= 300mg/500ml
have= 1000mg/20 ml
but since all 4 numbers are given Im having a hard time understanding how plugs into the desired over have equation.

Simplify:

Aminophylline 300 mg to be given.

You have: Aminophylline 500 mg/ 10ml. How many mls of Aminophylline should be added to the bag of D5W?

The size of the bag is irrelevant. The qty of aminophylline is the same whether it's 250 cc of fluid, or 2 liters

The correct answer was given above

imadoll1980 · Mar 14, 2014

Also, don't get caught up on your dilution. You know your adding the drug to the dilution, so you leave that out. You will add the 6ml of drug to your 500ml of D5W.

MrChicagoRN, RN · Mar 14, 2014

And doing it for them helped them learn how?

but only one of the two answers above you was right. :sarcastic:

Sabr, BSN, RN · Mar 14, 2014

Thanks to all who really put it in perspective. It has been 3 years since I really practiced dose calcs. And sometimes the extra numbers throw me off. It plugs into the equation perfectly I just have to focus and not get sidetraked by other impertinent info in the problem.

Thanks Imadoll1980 you really are a doll. Thank you all!

Esme12, ASN, BSN, RN · Mar 14, 2014

Thanks to all who really put it in perspective. It has been 3 years since I really practiced dose calcs. And sometimes the extra numbers throw me off. It plugs into the equation perfectly I just have to focus and not get sidetraked by other impertinent info in the problem.
Thanks Imadoll1980 you really are a doll. Thank you all!

Then maybe you need to brush up. Dosage calculation problems WILL be a normal part of your everyday life as a nurse. You WILL be consistently sidetracked as a nurse giving meds. Now you need to learn to focus.

DosageHelp.com - Helping Nursing Students Learn Dosage

You have 500mls to infuse over 8 hours

You need to add 300mg of a drug to the bag.

You have available 500mg/10 ml.

[TABLE=class: example]

[TR]

[TD][TABLE=class: fraction]

[TR]

[TD=class: numerator]Ordered

[/TD]

[/TR]

[TR]

[TD=class: denominator] Have[/TD]

[/TR]

[/TABLE]

[/TD]

[TD] x Volume Per Have[/TD]

[TD] = Y (Liquid Required)[/TD]

[/TR]

[/TABLE]

How much of the drug will you ad to the bottle? ____mls

What will you set the pump on?

[TABLE=class: fraction]

[TR]

[TD=class: numerator]Volume (mL)

[/TD]

[/TR]

[TR]

[TD=class: denominator] Time (hr)[/TD]

[/TR]

[/TABLE]

= Y (Flow Rate in mL/hr)