LinuxQuestions.org
Welcome to the most active Linux Forum on the web.
Home Forums Tutorials Articles Register
Go Back   LinuxQuestions.org > Forums > Non-*NIX Forums > General
User Name
Password
General This forum is for non-technical general discussion which can include both Linux and non-Linux topics. Have fun!

Notices


Reply
  Search this Thread
Old 06-20-2010, 07:33 PM   #1
sycamorex
LQ Veteran
 
Registered: Nov 2005
Location: London
Distribution: Slackware64-current
Posts: 5,836
Blog Entries: 1

Rep: Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251
maths questions


I'm trying to put together some numeracy exercises for nurses.
There's this website with a quiz. The javascript (with answers and solutions) doesn't work properly, but when you hover over the 'Show the correct answer' link, it displays the correct answer at the bottom status bar of a web browser)
I think they got one question wrong.

Quote:
7. Your patient has an order to receive 800 units of Heparin per hour by continuous intravenous infusion. If the pharmacy mixes the IV bag to contain a total of 5,000 units of Heparin in 500 ml of D5W, how many cc's per minute should the patient receive?
According to them, the correct answer it's 80cc/min, which doesn't seem to be right. I think that 80cc appears to be the volume per HOUR, not per minute. I've spent all day preparing this kind of stuff and can't tell what's right or wrong anymore

thanks
 
Old 06-20-2010, 07:59 PM   #2
smeezekitty
Senior Member
 
Registered: Sep 2009
Location: Washington U.S.
Distribution: M$ Windows / Debian / Ubuntu / DSL / many others
Posts: 2,339

Rep: Reputation: 231Reputation: 231Reputation: 231
14.6 cc/m?
 
Old 06-20-2010, 08:07 PM   #3
sycamorex
LQ Veteran
 
Registered: Nov 2005
Location: London
Distribution: Slackware64-current
Posts: 5,836

Original Poster
Blog Entries: 1

Rep: Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251
Quote:
Originally Posted by smeezekitty View Post
14.6 cc/m?
The patient would then receive approximately 7500 units of the medication in an hour

Last edited by sycamorex; 06-20-2010 at 08:08 PM.
 
Old 06-20-2010, 08:09 PM   #4
sycamorex
LQ Veteran
 
Registered: Nov 2005
Location: London
Distribution: Slackware64-current
Posts: 5,836

Original Poster
Blog Entries: 1

Rep: Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251
However I look at it, I get 1.3(3)cc/min. Is that right?
 
Old 06-20-2010, 08:34 PM   #5
jiml8
Senior Member
 
Registered: Sep 2003
Posts: 3,171

Rep: Reputation: 116Reputation: 116
5000 units in 500 ml equates to 10 units/ml.

So the patient receives 800 units/hr at 10 units/ml = 80 ml/hr.

= 1 1/3 ml/minute (80/60)

Since 1 ml = 1 cc, = 1 1/3 cc/min.
 
Old 06-21-2010, 02:58 AM   #6
sycamorex
LQ Veteran
 
Registered: Nov 2005
Location: London
Distribution: Slackware64-current
Posts: 5,836

Original Poster
Blog Entries: 1

Rep: Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251
Quote:
Originally Posted by jiml8 View Post
5000 units in 500 ml equates to 10 units/ml.

So the patient receives 800 units/hr at 10 units/ml = 80 ml/hr.

= 1 1/3 ml/minute (80/60)

Since 1 ml = 1 cc, = 1 1/3 cc/min.
Ok, thanks. Good. So it's them, not me
 
Old 06-21-2010, 05:29 AM   #7
H_TeXMeX_H
LQ Guru
 
Registered: Oct 2005
Location: $RANDOM
Distribution: slackware64
Posts: 12,928
Blog Entries: 2

Rep: Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301
My calculations:

Code:
800 UI   1 hr      500 cc       _
------ x ------ x -------- = 1.33 cc / min
1 hr     60 min   5000 UI

Last edited by H_TeXMeX_H; 06-21-2010 at 05:31 AM.
 
Old 06-21-2010, 08:21 AM   #8
MTK358
LQ 5k Club
 
Registered: Sep 2009
Posts: 6,443
Blog Entries: 3

Rep: Reputation: 723Reputation: 723Reputation: 723Reputation: 723Reputation: 723Reputation: 723Reputation: 723
1⅓

I did it using the Qalculate! Plasma widget
 
Old 06-21-2010, 11:50 AM   #9
sycamorex
LQ Veteran
 
Registered: Nov 2005
Location: London
Distribution: Slackware64-current
Posts: 5,836

Original Poster
Blog Entries: 1

Rep: Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251
Thanks guys, We all got the same result (different notation) so it's definitely their mistake. Just wanted some assurance that I'm not missing something.
 
Old 06-21-2010, 12:21 PM   #10
DavidMcCann
LQ Veteran
 
Registered: Jul 2006
Location: London
Distribution: PCLinuxOS, Debian
Posts: 6,142

Rep: Reputation: 2314Reputation: 2314Reputation: 2314Reputation: 2314Reputation: 2314Reputation: 2314Reputation: 2314Reputation: 2314Reputation: 2314Reputation: 2314Reputation: 2314
I hope you sent an email to Bonnie Angel pointing out her mistake. Not a good advert for the University of North Carolina!
 
Old 06-21-2010, 12:26 PM   #11
Dogs
Member
 
Registered: Aug 2009
Location: Houston
Distribution: Slackware 13.37 x64
Posts: 105

Rep: Reputation: 25
Yeah.. I know a lot of nurses, and the examples they use most often to describe the risks involved in nursing...

"Imagine patient x needs y cubic centimeters of chemical j, and if you give him just d more cubic centimeters of chemical j, or you give him less, then he may die.


So, imagine your doctor asks you for .3cc of chemical j, and you get .03cc.

Might kill that person.
 
Old 06-21-2010, 12:45 PM   #12
sycamorex
LQ Veteran
 
Registered: Nov 2005
Location: London
Distribution: Slackware64-current
Posts: 5,836

Original Poster
Blog Entries: 1

Rep: Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251Reputation: 1251
I discussed it with the group I teach. The good thing is that in real life they are not allowed to make any decision like that on their own. There has to be another person who will confirm the result. The worrying thing is that it seems they were taught a few formulae and sometimes they apply them blindly without trying to understand the problem first. In 99% cases it works, but in this field 99% is not good enough.


Quote:
I hope you sent an email to Bonnie Angel pointing out her mistake. Not a good advert for the University of North Carolina!
I haven't thought of doing it. Actually I might do. The website hasn't been updated for 7 years and the js is broken (perhaps for a reason)
 
Old 06-21-2010, 01:02 PM   #13
moxieman99
Member
 
Registered: Feb 2004
Distribution: Dabble, but latest used are Fedora 13 and Ubuntu 10.4.1
Posts: 425

Rep: Reputation: 147Reputation: 147
The final answer

The answer is "zero," because the Republicans will insist on searching for a Death Panel Review Board and in the time it takes for them to discover that the panels don't exist and decide to make one up, the patient will have died.

Or, given that North Carolina is a Republican state and the Republicans' health plan is "die quickly," maybe the answer really is "80cc per minute" ....
 
Old 06-21-2010, 01:30 PM   #14
H_TeXMeX_H
LQ Guru
 
Registered: Oct 2005
Location: $RANDOM
Distribution: slackware64
Posts: 12,928
Blog Entries: 2

Rep: Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301Reputation: 1301
Well, because it is IV infusion and heparin, I doubt he would die ... you'd probably catch the mistake before he died, and the half life is only 1 hour.
 
Old 06-21-2010, 02:06 PM   #15
moxieman99
Member
 
Registered: Feb 2004
Distribution: Dabble, but latest used are Fedora 13 and Ubuntu 10.4.1
Posts: 425

Rep: Reputation: 147Reputation: 147
heparin is a blood thinner. If there were any internal complications at all, the patient could easily bleed to death before the mistake was caught.
 
  


Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
Maths predicates for gprolog manolakis Programming 6 06-12-2007 11:39 AM
Verizon Maths acid_kewpie General 9 12-10-2006 09:37 AM
please help me do maths :) darkRoom General 36 04-11-2005 01:03 PM
problem with maths redduck666 General 7 02-12-2005 02:33 PM
And some maths :-P Mathiasdm General 7 11-11-2004 03:48 PM

LinuxQuestions.org > Forums > Non-*NIX Forums > General

All times are GMT -5. The time now is 10:05 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration