HELP HELP

melsman1904 · May 29, 2009

i've tried everything and can't get the right answer.
1)Calculate the number of mL to administer with each dose. Round your answer to the nearest tenth.
Ordered: Trimethobenzamide 125 mg IM q4h prn
On hand: Trimethobenzamide 100mg/mL 20mL Multi-Dose Vial
I got 25:sniff:

125 mg= 1.25 mL Rounded: 1.3ml

2) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
Ordered: Ranitidine 45 mg IM now
On hand:Ranitidine 25mg/mL 6mL Multi-Dose Vial
I got 10.9:sniff:

45 mg = 1.8 mL

3) Calculate the number of mL to administer. Round your answer to the nearest tenth.
Ordered: Octreotide Acetate 220 mcg sub-q q12h
On hand: Octreotide Acetate 500mcg/mL Single-Dose Vial

220 mcg = 0.44 mL Rounded: 0.4 mL

4) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
Ordered: Trifluoperazine 5 mg IM now
On hand: Trifluoperazine 2 mg/mL Single-Dose Vial

5 mg = 2.5 mL

5) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
Ordered: Heparin sodium 3000 units deep Sub-Q q8h
On hand: Heparin sodium 10,000 units/mL Single-Dose vial

3000 units = 0.3 mL

6) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
Ordered: Medroxyprogesterone 750 mg IM weekly
On hand: Medroxyprogesterone 400 mg/mL Single-Dose vial

750 mg = 1.875 mL Rounded: 1.9 mL

morte, LPN, LVN · May 29, 2009

if we give you the answers, were does that leave you? show your work and see if someone can point out what you are doing wrong...

justt139 · May 29, 2009

Thank you for everything ...you are an angel.!

donnasRN · May 29, 2009

if we give you the answers, were does that leave you? show your work and see if someone can point out what you are doing wrong...

I agree. You should do all of the questions and show all of your work. You won't learn anything if you keep looking for answers on here. Why don't you create/join a study group with students in your class or ask your professor to help you during free time? Allnurses.com won't be there during your licensing exam! LOL

JenRN30, BSN · May 29, 2009

Justt,

Do you understand what were doing wrong??

melsman1904 · May 29, 2009

Although I did give the answers, I am in agreement with others. Show your work and someone will surely be able to point out what you're doing wrong. Just knowing the answers isn't good enough. You need to know how to find the answers.

Ordered: Trimethobenzamide 125 mg IM q4h prn

On hand: Trimethobenzamide 100mg/mL 20mL Multi-Dose Vial

125 mg : X mL :: 100 mg : 1 mL

125 * 1

100 * X

100x = 125

100/x = 125/ 100

125 mg= 1.25 mL Rounded: 1.3ml

Ordered: Ranitidine 45 mg IM now

On hand:Ranitidine 25mg/mL 6mL Multi-Dose Vial

45 mg: x mL:: 25 mg: 1 mL

45 * 1

25 * X

25X = 45

25/x = 45/25

45 mg = 1.8 mL

Ordered: Octreotide Acetate 220 mcg sub-q q12h

On hand: Octreotide Acetate 500mcg/mL Single-Dose Vial

220 mcg : X mL :: 500 mcg: 1 mL

220 * 1

500 * X

500X = 220

500/X = 220/ 500

220 mcg = 0.44 mL Rounded: 0.4 mL

Ordered: Trifluoperazine 5 mg IM now

On hand: Trifluoperazine 2 mg/mL Single-Dose Vial

5 mg : X ml :: 2 mg : 1 mL

5 * 1

2* X

2X = 5

2/ X = 5/ 2

5 mg = 2.5 mL

Ordered: Heparin sodium 3000 units deep Sub-Q q8h

On hand: Heparin sodium 10,000 units/mL Single-Dose vial

3000 units : X mL :: 10000 units : 1 mL

3000 * 1

10000 * X

10000X = 3000

10000/ X = 3000/ 10000

3000 units = 0.3 mL

Ordered: Medroxyprogesterone 750 mg IM weekly

On hand: Medroxyprogesterone 400 mg/mL Single-Dose vial

750 mg : X mL :: 400 mg : 1 mL

750 * 1

400 * X

400X = 750

400/ X = 750 / 400

750 mg = 1.875 mL Rounded: 1.9 mL

roser13, ASN, RN · May 29, 2009

"Thank you for everything ...you are an angel.! "

Seriously, I'm not trying to be a spoilsport, but I don't know how giving you the answers and not even showing you how they were obtained can be helpful.

You will eventually have to do this for yourself. Every facility I've hired into has required a basic med calc test. It is to your advantage to figure out what you're doing wrong. If you're in nursing school, what will you do on the NCLEX without these skills?

At the very least, can you look at your answers and figure out that they don't make sense? For instance, with (1), your answer of 25 mls of 100mg/ml drug would yield a dose of 2500 mgs. Of course, that's not right.

Sometimes when I would get confused (because I'm arithmetically challenged), it helped me to try to use logic.

cherrybreeze, ADN, RN · May 29, 2009

I agree, we would need to know HOW you're getting those answers, if it's actually going to be of help and not just answering them FOR you.

I can see from the first question that, it looks like you took the "20ml multi dose vial" into consideration, and that part of the question is irrelevant.

GOMER42 · May 29, 2009

:icon_roll

Thank you for everything ...you are an angel.!

:icon_roll

mntgrl · May 30, 2009

I think you are using the amount of the ml in the whole vial instead of the medication concentration which is mg/ml

for example

1)Calculate the number of mL to administer with each dose. Round your answer to the nearest tenth.

Ordered: Trimethobenzamide 125 mg IM q4h prn

On hand: Trimethobenzamide 100mg/mL 20mL Multi-Dose Vial

I got 25:sniff:

if you use Desired/Have x ML (ml of the doseage concentration not the whole vial) you get the answer

125mg/100mg x 1ml = 1.25ml rounded to nearest tenth=1.3ml

hope it helps

Daytonite, BSN, RN · May 31, 2009

i have previously suggested that you will get better responses if you post these kinds of questions on the nursing student assistance forum (click the students tab above to get to this forum). one of the moderators has already moved one of your threads to that forum. you will find tutorials on how to work medication math problems on post #2 of this sticky thread: https://allnurses.com/general-nursing-student/nursing-math-thread-264395.html - the nursing math thread