drug claculations

[sk1988]

can anyone answer this question or give me the formula?

You are asked to give glucose 20mg IV. you have a bag of glucose 5%. what volume are you going to infuse?

[loveofrn, BSN, RN]

If thats all the question, then Since there is 5g/100ml

So...20mg×(100ml/5000mg)×60min because it is an Iv. That would give you 24 ml/hr

If there are 5mg per 100mL then there are 10mg per 200mL, 15mg per 300mL, and 20mg per 400mL... There's your volume.

If thats all the question, then Since there is 5g/100ml

So...20mg×(100ml/5000mg)×60min because it is an Iv. That would give you 24 ml/hr

There's nothing in the problem statement which says anything about time or flow rate.

[loveofrn, BSN, RN]

However it seems like the question is incomplete though and I think 5% is 5g/100ml not 5mg/100ml according to calculating with confidence by mosby

[pmabraham, BSN, RN]

I believe lofoffrn is correct that the question is incomplete. While music in my heart is correct there's no mention of flow rate, the question doesn't seem complete.

[smf0903]

I get 0.4mL

100mL/5g * 20mg * 1g/1000mg = 0.4mL

(This is the drawn-out equation so that you can see the conversions.)

[nurseprnRN, BSN, RN]

See, this is a CHEMISTRY question. Before you go anywhere at all, you have to think back to your chemistry prerequisite and remember what a 5% solution is and how you would make it, and why that is. And you have to remember your conversions.

Water weighs 1gm per cc, remember that?

So 100cc = 100 grams

A 5% solution would be 5grams in 100 grams, which is the same thing as 5 grams in 100cc. Or 5000mg in 100cc. How many mg is in 1 cc, then?

So how many cc would 20mg be?

[KelRN215, BSN, RN]

If there are 5mg per 100mL then there are 10mg per 200mL 15mg per 300mL, and 20mg per 400mL... There's your volume.[/quote']

5 GRAMS per mL, not 5 mg.