[akana11]

I second that.

[MissMissy]

Hi everyone,

This is a great thread. Very helpful to me especially since my math is a bit rusty. Thanks, again.

Missmissy

[Yayamaya]

The main block that I am having is when calculating dose is when to divide by the number of doses per day and when not to......

For example - Child is 22 kg. Dosage is 10mg/ml. Order says child needs 4mg/kg/day po 12 hours.
Here you would divide your answer by 2 right??????

Child is 60kg. Dosage is 2mg/2ml. Order says child need mg/kg divided into 8 equal doses.
Here you would divide your answer by 3 right?????

Child is 40kg. Order is 5mg/ml. Dosage is 5mg/ml. Order says childs need 5mg/kg po 4 hours.
Here you would NOT divide by 6 right?????? The po 4 hours is not relevant to solving the problem.

So is the key to look for the PER DAY??

Thanks!!!!

[Daytonite]

Child is 22 kg. Dosage is 10mg/ml. Order says child needs 4mg/kg/day po 12 hours.


Here you would divide your answer by 2 right??????

"4mg/kg/day po 12 hours" makes no sense and is very unclear. I would assume nothing. I would call the doctor to clarify the order. If this were on a test I would ask the instructor to clarify the question.

Child is 60kg. Dosage is 2mg/2ml. Order says child need mg/kg divided into 8 equal doses.


Here you would divide your answer by 3 right?????

I wouldn't. I would divide 24 hours by the 8 doses to get 3 hours/dose, meaning doses would be given every 3 hours.

Child is 40kg. Order is 5mg/ml. Dosage is 5mg/ml. Order says childs need 5mg/kg po 4 hours.

Here you would NOT divide by 6 right?????? The po 4 hours is not relevant to solving the problem.

"5mg/kg po 4 hours" is very unclear and I would assume nothing. I would call the doctor to clarify the order. If this were on a test I would ask the instructor to clarify the question.

[CuteLittleNurse2b]

Thank you everyone who has helped put this thread together!!! You have really helped me out tremendously on the little things I have forgotten!

[elf5ft10]

Holy cow, im glad im not the only one. Man I just passed math last semester with an 84. My lowest grade ever. so don't feel bad, i had to get a tutor just to get that grade. Keep your chin up, it does get easier.

[nurz2be]

HERE


This might help some of you make the adjustments in your medical math studies. GOOD LUCK

[beth66335]

That site is great!

[flames9]

OK, I know the answer to this question is 200 ml/hr, but not sure if I'm looking at it correctly. Here is the question:

The patient is to receive 1 gram of cefatazine intravenously over 30 minutes. The pharmacy sends a 100 ml mini bag with 500 mg of cefatazine per 50 ml. What rate will you set on the pump to deliver the prescribed medications?

Maybe my mind is frizzled because we have our drug dosage exam tomorrow, joy joy!

The way I looked at it, its 100 ml bag and to give it in 30 minutes, you just double the volume, in this case 100 ml, so ur answer is 200 ml/hr BUT is there more to the question? I guess I'm sort of thinking "unmedically" lol as the pharmacy isn't going to send up a 100 ml bag with 500 mg of cefatazine per TWENTY FIVE ml, correct?? because that would be too much meds,correct? I guess I'm just trying to look at the question in different ways

Originally I set my equation up as this and got 200ml/hr, but i think I just lucked out:

500 MG = 1000 mg
------- --------
100ML X

And that works out to 200 ml/hour but I think its a fluke.

In class they set i t up as:

Order: 1 gram
----- ----- X 100 ml = 100 ml/hr,
HAVE 1 gram

but since you need it in 30 min, but since you need it in 30 minutes, multiply by 2, you get 200 ml/hr

I guess what I'm getting at,if you don't HAVE 1 gram of cefatazine, only 900 mg in the bag, that works out to 222 ml hr? (30 minutes, so double the 111)

and if the 100 ml bag the pharmacy sent you with 500 mg of cefatzine per 25 ml. That works out to 50 ml hr, but 30 min, so double that to 100 ml hr.

As i stated earlier, when I looked at the problem, i automatically thought to myself, double the 100 ml/hr (to 200/ml/hr) because you need it in 30 minutes. And I guess what you HAVE, works out nicely as 50ml times 2 is 100 ml. I guess Im just concerned if they change that part of the equatuion. clear as mud? thanks!!

Am i out of whack or what? lol Sorry if I confused you as well, just a tad stressed about tomorrows exam.

[beth66335]

Originally Posted by flames9

OK, I know the answer to this question is 200 ml/hr, but not sure if I'm looking at it correctly. Here is the question:

The patient is to receive 1 gram of cefatazine intravenously over 30 minutes. The pharmacy sends a 100 ml mini bag with 500 mg of cefatazine per 50 ml. What rate will you set on the pump to deliver the prescribed medications?

Maybe my mind is frizzled because we have our drug dosage exam tomorrow, joy joy!

The way I looked at it, its 100 ml bag and to give it in 30 minutes, you just double the volume, in this case 100 ml, so ur answer is 200 ml/hr BUT is there more to the question? I guess I'm sort of thinking "unmedically" lol as the pharmacy isn't going to send up a 100 ml bag with 500 mg of cefatazine per TWENTY FIVE ml, correct?? because that would be too much meds,correct? I guess I'm just trying to look at the question in different ways

Originally I set my equation up as this and got 200ml/hr, but i think I just lucked out:

500 MG = 1000 mg
------- --------
100ML X

And that works out to 200 ml/hour but I think its a fluke.

In class they set i t up as:

Order: 1 gram
----- ----- X 100 ml = 100 ml/hr,
HAVE 1 gram

but since you need it in 30 min, but since you need it in 30 minutes, multiply by 2, you get 200 ml/hr

I guess what I'm getting at,if you don't HAVE 1 gram of cefatazine, only 900 mg in the bag, that works out to 222 ml hr? (30 minutes, so double the 111)

and if the 100 ml bag the pharmacy sent you with 500 mg of cefatzine per 25 ml. That works out to 50 ml hr, but 30 min, so double that to 100 ml hr.

As i stated earlier, when I looked at the problem, i automatically thought to myself, double the 100 ml/hr (to 200/ml/hr) because you need it in 30 minutes. And I guess what you HAVE, works out nicely as 50ml times 2 is 100 ml. I guess Im just concerned if they change that part of the equatuion. clear as mud? thanks!!

Am i out of whack or what? lol Sorry if I confused you as well, just a tad stressed about tomorrows exam.

Here it is in DA:

100ml X 60min = 6000 = 200ml/hr
30min.... 1hr...... 30

You do have 1 g in the bag according to the problem not 900mg, does this make more sense? I have trouble with this too, I can see the answer before i work the problem then I have a hard time figuring out how to set it up so the teacher understands my thinking!