Re: Re: Math questions

[Guest guest]

Dear Dora,

I too agree with you that the volume that is 'correct' mathematically in the

problem given in the book and as posted by is very INSIGNIFICANT and

not a therapeutic value. You did a great job trying to 'fix' the question to

real world.

However if we go directly from the information in the problem, the answer is

0.075 ml. What isincorrect is the ANSWER in Noah Rifman's book. I believe it

is a typo of 75 mcg.

After all the question DOES ask for VOLUME and mcg is weight ormass NOT volume.

Liter or ml is volume so therefore I think this is further proof of a typo.

The doctor I spoke to said that this volume is therapeutically incorrect. But

that the math that I had done was correct.

So what we have here is a mathematical 'exercise' to see if the student gets the

math correct even if they know the true real world therapeutic values and

orders.

Reifman could have just said Drug A and we would not refute the answer as

0.075ml, except for the amount of drug in the drip chamber. This also led me

to wonder if this was withdrawn from a bag and then injected into the pt. But

this is not protocol either.

So I think YOU and I would agree that this problem does not match real world

orders AND the answer in the book is incorrect or a typo and the answer that I

gave is correct for the information given and the changed problem and answer

that you gave is correct for real world.

That being said:

1. Correct answer is : 0.075ml dopamine in 1/2 hour

2. Answer in book is incorrect.

3. Question developed to suit real world Tx : is per MINUTE

4. Answer to question developed to suit real world Tx: 2.25 ml

In addition YOU and I know that many study books have typos and other problems

in the first and other editions. This is not a first edition, but we know this

book to have had a few typos in the past. All books dom as we have agreed

before. I think we just never had this math problem from this book posted here

before for us to discover.

Okay perhaps we need to start a section of incorrect studybook questions and/or

answers???

Thanks for you consistent diligence and input. So glad you have you here.

So ......do this problem two different ways:

1. By the book Jeanetta's answer 0.075ml = 0.24 mg = 240 mcg is correct

Answer in book is incorrect.

2. By the problem that Dora gave you: 2.25ml is correct

Hope this helps. thank you BRENDA for your input and postings. Whether you

realize it or not you helped many on this site, who remain silently lurking, to

understand this type of question.

Respectfully,

Jeanetta Mastron CPhT BS

Pharm Tech Educator

Founder/Owner

doracpht <doracpht@...> wrote: Hi J-

I think #2 is a very poorly worded and inaccurate question. Standard

dopamine dosing is mcg/kg/min. According to the Reifman's " right "

answer of 75mcg, your response would also be incorrect---though I see

how you got there with the information provided. I initially solved it

the same way your class did, but thought about insignificant volume

(0.075ml)---that's not even enough volume to get into the drip chamber

of the tube set let alone have any therapeutic effect on a 60kg

person! Sooo I tried to " fix " it using a " real life " dopamine dosing

protocol.

Dora

[Guest guest]

Dear

Please see my previous posting.

Thanks for you patience and input. Basically the book has a typo.

Jeanetta

> > > The questions came from " Certification Review For Pharmacy

> > > Technicians " by Noah Reifman, Seventh Edition

> > >

> > > The answer to the first question is the same as the answer in

> the

> > > book, but for the #2 question the book shows possible answers:

> > > a) 50mcg

> > > 75mcg

> > > c) 0.1mg

> > > d) 0.25mg

> > >

> > > With b)75mcg being the possible answer. Also thank you the

> Answer

> > to

> > > #1 question.

> > >

> >

>

The answer in the book is b)75mcg.

[Guest guest]

You are most welcome!

 

NS means " one normal saline " which means 0.9% NaCL or " zero.9 percent sodium

chloride "

 

If any other abbreviation exists for NS in medicine or pharmacy either I am not

aware of it or I am having a brain freeze.

 

 

Jeanetta Mastron CPhT BS

Founder/Owner

From: kendruha <kendra.ednacot@...>

Subject: Re: Math Questions

Date: Thursday, October 28, 2010, 11:39 PM

Wow that makes sense now! Thank you so much.

So, just to make it clear. NS is always 0.9%NaCl.

Thank you again!

- Kendra

> >

> >

> > Here is a math problem that I found on the Facebook Tech Lectures group:

> >

> > Tech Lectures Review Question No. 35: How much NaCl is in the following IV

Bag: D5 1/2 NS 500ml

> > a. 0.9 grams

> > b.1.25 grams

> > c. 2.25 grams

> > d. 9 grams

> >

> > I'm not sure how he got the numbers to solve this one too. I think it's also

because I don't understand what D5 1/2 NS means.

> >

> >

> >

> > Thank you!

> >

>

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