HELP!! solve math problem

Nurses General Nursing

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Specializes in OR (Scrub Tech/LPN).

Hey thanks for stopping by..I do believe I am reading too much in the problem..here goes..

IT reads:

Calculate mg/hr. A drug of 400mg is ordered. Available: 600mg/4cc, reconstituted with 50ml?? I am not sure where I fit the 50ml in the equation..if it were just 600mg/4cc, not a problem, Am I reading too much? Thank you..this is driving me nuts...

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Specializes in rehab, long-term care, ortho.

I think once you reconstitute it is should be 600 mg/50 ml. Then work out the problem.

(Although I'm not sure about that 4 cc; would it then be 600 mg/54 ml? - I've not had it presented that way before)

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Specializes in Peds/Neo CCT,Flight, ER, Hem/Onc.

I'm thinking the 50ml is what is called a "distractor". It doesn't have a place in the equation. What I'm guessing is the drug is in a 50ml bag with a final concentration of 600mg/4cc. Unless it specifically tells you to reconstitute it. It's an oddly worded question either way. What do you get when worked out with the 600mg/4cc?

No...this doesn't seem right either because the concentration is ridiculous (unless it's supposed to be micrograms) . Can you post the entire question as written?

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Hey thanks for stopping by..I do believe I am reading too much in the problem..here goes..

IT reads:

Calculate mg/hr. A drug of 400mg is ordered. Available: 600mg/4cc, reconstituted with 50ml?? I am not sure where I fit the 50ml in the equation..if it were just 600mg/4cc, not a problem, Am I reading too much? Thank you..this is driving me nuts...

there is something missing or and error, or both

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Specializes in OR (Scrub Tech/LPN).

I think you are correct, it's very confusing. If 600mg/4cc is reconstituted and put in a 50cc bag, wouldn't that mean their is now 600mg in the 50cc bag and that is your concentration? Thank you

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Specializes in OR (Scrub Tech/LPN).

Hey, thanks..I called a classmate to make sure I had stated the problem correctly and it is exactly like I had remembered..When I calculated 400mg to be administed from 600mg/4cc, I can up with 2.66cc. I know that's not right..

Wonder if i divided the 4cc into 600 to give me how many mg/cc is where the catch is..thank you for helping..

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Hey thanks for stopping by..I do believe I am reading too much in the problem..here goes..

IT reads:

Calculate mg/hr. A drug of 400mg is ordered. Available: 600mg/4cc, reconstituted with 50ml?? I am not sure where I fit the 50ml in the equation..if it were just 600mg/4cc, not a problem, Am I reading too much? Thank you..this is driving me nuts...

you need a rate, ie volume over time.....100ml an hour, 50 ml an hour, some such.....

yes the dose 2/3 of 4cc (ml).......4/3x2=2.6666666666 rounded off where ever you are taught....lol...

that is put in the 50 ml "partial fill" bag and then we are back to needing a RATE.....

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Specializes in SRNA.

What I'm confused about is that the problem says to calculate mg/hr but no timeframe is given.

If you had a drug that's 600mg/4ml and you reconstitute it with 50ml of fluid, you then have 600mg in 54ml of fluid. 400mg would then equal 36ml. But mg/hr? It depends on how fast you give it.

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Specializes in OR (Scrub Tech/LPN).

The problem only ask for me to "calculate mg/hr"..sorry, I know it doesn't make sense...thinking back one of the answers I could have chosen was "no answer is correct"..so maybe that's my sign..But thank you for trying to help, as soon as I find the correct answer, I will let ya'll know..(we are taught to take to the hundredths place and DO NOT ROUND!!) lol..you would just have to know my instructor..:)

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Specializes in Neonatal ICU.

I wonder if they are asking for mg/ml and everything else is there to distract you?

600mg/4ml = 150mg/ml

Oh, and my nursing school taught us that cc is no longer acceptable due to it being so easily misread as "zeroes" when handwritten..is anyone else being taught this? :bugeyes:

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The problem only ask for me to "calculate mg/hr"..sorry, I know it doesn't make sense...thinking back one of the answers I could have chosen was "no answer is correct"..so maybe that's my sign..But thank you for trying to help, as soon as I find the correct answer, I will let ya'll know..(we are taught to take to the hundredths place and DO NOT ROUND!!) lol..you would just have to know my instructor..:)

what are the answers offered?

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Specializes in OR (Scrub Tech/LPN).

Yes, we are taught that way, as well..just hard not to use "cc" after 25 years

I worked it like you did, as well..makes sense but other ways makes sense too. Seems if it is 150mg/ML and you would need to know how many mg are in a 50ml bag. Then calculate the problem BUT the first line of the problem says "calculate mg/hr"...what in the world am i missing here..lol..thanks for your time

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