A puzzling dosage calc. question.

Nursing Students Student Assist

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Hello everyone,

I'm due for my dosage exam tomorrow morning and have one practice problem that seems to stump me.

Doctor's Order: 0.5L of NS to infuse over 2 hrs.

I thought that I would need the 1000mL = 1L, but when I plug that in the answer is still wrong. We have 75 questions and 1 hour 20 minutes to complete; so far I can beat the time with 33 minutes left and missed only 3. :pumpiron: I'd really like to know how to work this problem just in case there is one just like it on the exam.

A big thanks to anyone who helps me

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Hello everyone,

I'm due for my dosage exam tomorrow morning and have one practice problem that seems to stump me.

Doctor's Order: 0.5L of NS to infuse over 2 hrs.

I thought that I would need the 1000mL = 1L, but when I plug that in the answer is still wrong. We have 75 questions and 1 hour 20 minutes to complete; so far I can beat the time with 33 minutes left and missed only 3. :pumpiron: I'd really like to know how to work this problem just in case there is one just like it on the exam.

A big thanks to anyone who helps me

0.5L over two hours = 1L over 4 hours......take it from there.....

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Specializes in med/surg, telemetry, IV therapy, mgmt.

0.5L (0.5 Liter) is 500 mL. So, 500 mL infusion over 2 hours would be 250 mL/hour.

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0.5l (0.5 liter) is 500 ml. so, 500 ml infusion over 2 hours would be 250 ml/hour

that is what i thought, but the book says the answer is 87.5 ml/hr. now tell me how they came up with that answer, because i sure cannot find it. perhaps it is just a misprint.

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Specializes in ortho.

if you happen to be using the book "clinical calculations" (5th edition), beware that the book is loaded with incorrect answers!!

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