CRNE June 2012 - page 5

by bella.donna

104,217 Views | 372 Comments

Anyone started to prepare for CRNE June 2012?... Read More


  1. 1
    hey everyone,

    i am aware that calculators are not permitted for the exam, i am completely fine with manual calculations when it comes to everything besides for fluid dosages. reason being it usually results in a decimal answer as one typically divides the smaller number from the larger one, and i have difficulty doing that by hand - with a calculator it is very simple and when i do it by hand i usually get the right answer but i am always unsure of my answer. i want to be as confident as i am when i do IV flow rates. can someone assist?

    For instance, can you share step by step how you do this one by hand...

    A client is ordered 5 milligrams of Flupenthixol decanoate by intramuscular injection. 40 milligrams in 2 millilitres of liquid for IM Injection is available. How many millilitres will you administer?

    thanks in advance!
    mapleleafcn likes this.
  2. 2
    ordered dose / dose on hand x volume = administered volume

    5mg/40mg x 2ml = x

    step 1: lets figure out what 5/40 is by reducing the fraction.

    5 goes into 5: once, therefore numerator is 1
    5 goes into 40: 8 times, therefore denominator is 8

    step 2: now that the fraction is reduced, lets solve it using simple longhand division.


    ____
    8)1

    8 goes into 1: 0 times


    _0___
    8)1

    now we add a 0 to the dividend, and a decimal place in the quotient.

    _0.___
    8)10

    8 goes into 10 once.


    _0.1___
    8)10
    ___8__
    ___2__


    this leaves 2 as the remainder. now we add a 0 to the dividend and carry it down to the remainder
    _0.1___
    8)100
    ___8__
    __20__

    8 goes into 20 twice leaving 4 as the remainder.

    _0.12___
    8)100
    ___8__
    ___20__
    ___16__
    ____4__


    now we add another 0 to the dividend and carry it down to the remainder.

    _0.12___
    8)100
    ___8__
    ___20__
    ___16__
    ____40__


    8 goes into 40 5 times leaving 0 as remainder. we have divided the fraction!

    _0.125___
    8)100
    ___8__
    ___20__
    ___16__
    ____40__
    ____40__
    _____0__


    step 3:

    multiply 0.125 x 2 ml (volume) = 0.25 ml

    ∴ volume administered would be 0.25 ml.
    Last edit by petethecanuck on Jun 2, '12 : Reason: bleh division won't format cleanly.. hope it makes sense :)
    allicandoispray and RiRi03 like this.
  3. 1
    Wow, that was a very long way around a simple, very basic math problem. 40mg/2mL = 20mg/1 mL and 5mg/20mg = 0.25mL
    allicandoispray likes this.
  4. 1
    5mg/40mg x 2ml = 0.25ml
    allicandoispray likes this.
  5. 0
    i love this place!!

    thank you all! i wanted to know how to do it by hand step by step with accuracy. the fractions made it a whole lot easier, it has been a while! i have been testing myself and have been getting them all correct! i am truly grateful for this community.
  6. 0
    [QUOTE=allicandoispray;6541360]pete, i agree with you. 1 was my answer as well. I crossed out 4 immediately based on the R-sided HF. shockingly, 4 was the answer. i have done almost 3000 practice questions and this one still bothers me, i am just going to note this one off as an error. the rationale in the book says "elevation of an extremity promotes venous and lymphatic drainage by gravity" and the rationale as to why 1 was wrong is that "this action is taken cautiously and should be the decision of a physician."

    My answer is #4 too. I think among all the options "elevation of legs" is the most independent nursing action/intervention. #1 is also a nursing intervention but it is an dependent nursing action because you need a doctor's order for this. Fluid restriction cannot be implemented just like that without a doctor's order. That's why i thought of #4 coz it is an independent nursing action and it limits spread of edema of the legs.


    what gets me is that there was another similar question just before this question in the same book that states Mr. Mars has CHF and pulmonary edema. Which of the following nursing actions would help to alleviate his respiratory distress?

    1. elevate lower extremities
    2. encourage frequent coughing
    3. place him in an orthopneic position
    4. prepare him for modified postural drainage



    Answer. 3 in case anyone is wondering HOWEVER, the rationale as to why #1 is wrong? (which i crossed out first) is that elevation of extremities should be avoided because it increases venous return, placing an increased workload on the heart! so wouldn't elevating the patient's extremities essentially be contraindicated in patient's with HF? confusing! if anyone agrees with the initial question + answer please share as to why you agree.

    In this case my answer is #3 because the question is more specific about respiratory distress. #2 and #4 are also related to pulmo to but it is for patients who have sputum/mucous in the lungs not for pulmonary edema. On the other hand, elevation of extremities does not increase the blood volume, pitting edema occurs because there is build up of blood in the lower extremities due to ineffective pumping of the heart and eventually there is third space fluid shifting or the fluid leaks to the interstitial space. When there is fluid shifting it is bad and you have to resolve it by elevating the legs so fluid goes back in the intravascular space/veins.

    Hope that answers your question. Goodluck to all June 2012 examinees.
  7. 0
    Quote from louise1821
    Hi
    I am also studying for the June 2012 exam, I will take it in London, Ontario. I'm studying Mosby CRNE review, and the new edition of Community Health Nursing in Canada, Canadian Fundamentals in Nursing - Potter and doing the CARE CRNE review course here in London. I also did the IEHP course through the ACCESS center - online course, which helped.

    Faithful did I meet you on line at the "Campbell Cohen forum", if so you can see I got my eligibility for CRNE last friday after 10 months.

    Olga

    Hi Olga, I am about to start the review course with CARE in Hamilton on Monday. What are your feedbacks about their workshop? Was it helpful?
  8. 0
    Quote from allicandoispray
    i love this place!!

    thank you all! i wanted to know how to do it by hand step by step with accuracy. the fractions made it a whole lot easier, it has been a while! i have been testing myself and have been getting them all correct! i am truly grateful for this community.
    That's what I figured you were asking about which is why I "tried" to show how to do it via the long division method.

    @ Keemooy. #4 is not the answer to that question. #1 is. You wouldn't raise the legs of someone with Rt sided heart failure.
  9. 0
    Quote from petethecanuck
    That's what I figured you were asking about which is why I "tried" to show how to do it via the long division method.

    @ Keemooy. #4 is not the answer to that question. #1 is. You wouldn't raise the legs of someone with Rt sided heart failure.

    @pete since when has elevation of legs to resolve pitting edema been contraindicated in CHF? one of the nursing care/intervention to resolve edema is elevating the legs. It's always been the first line independent nursing intervention when it comes to peripheral edema.

    can you provide me with your source that elevation of legs in contraindicated with edema in CHF?
  10. 0
    "2. Elevate extremities except when the client is in acute distress."

    Congestive Heart Failure, Planning/Implementation. Mosby's Canadian Comprehensive Review of Nursing p. 115


Top