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Math Help - Conversion problems

  1. #1
    Junior Member Cait's Avatar
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    Exclamation Conversion problems

    We have to do these for our beginning algebra class.. and they were origionally for the nursing program!!

    I dont understand how to doo them at all.. And i think it's really stupid but anyway..

    It doesnt help im not farmiliar with ANY of the terms..


    2. Heparin sodium, 1,000 units per hour is ordered for a woman with a Blood clot in her leg. It is supplied as 50,000 units in 500ml of dextrose and water.

    a.) How manly mls per hour should be set on an infusion pump? - I got this part done.. it's

    100units/1 hr * 500 ml/50,000 units = 10ml/hr.


    but b.. i didnt.

    b.) If no infusion pump is available, the nurse will need to use microdrip tubing, which delivers 60 drops per ml. How many drops per minute should be administered???

    I think the answer is 600drops/hr.. but im not sure.


    3.) MOrphine sulfate 2mg IV push is ordered to relieve shortness of breath in a patient with chronic lung disease. It is supplied as grains 1/4 pr ml. How many mls should the nurse administer?



    and


    4.) A patient is recieving 250 ml normal saline over 4 hours, using tubing with a drop factor of 10 drops per ml./ How many drops per minute should be delivered?

    250ml/4hr = 62.5 ml/hr

    62.5/60 = 1.0416ml/minute * 10 drops =

    10.416 drops per minute

    and im not sure if this is right either.

    Thanks guys i owe you my life XP

    ~Math illiterate, Cait
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Cait View Post
    We have to do these for our beginning algebra class.. and they were origionally for the nursing program!!

    I dont understand how to doo them at all.. And i think it's really stupid but anyway..

    It doesnt help im not farmiliar with ANY of the terms..


    2. Heparin sodium, 1,000 units per hour is ordered for a woman with a Blood clot in her leg. It is supplied as 50,000 units in 500ml of dextrose and water.

    a.) How manly mls per hour should be set on an infusion pump? - I got this part done.. it's

    100units/1 hr * 500 ml/50,000 units = 10ml/hr.
    You are correct

    but b.. i didnt.

    b.) If no infusion pump is available, the nurse will need to use microdrip tubing, which delivers 60 drops per ml. How many drops per minute should be administered???

    I think the answer is 600drops/hr.. but im not sure.
    You are correct again but they asked for the drops per minute, not hour. what would the answer be then?

    3.) MOrphine sulfate 2mg IV push is ordered to relieve shortness of breath in a patient with chronic lung disease. It is supplied as grains 1/4 pr ml. How many mls should the nurse administer?
    should the bold word be grams?


    4.) A patient is recieving 250 ml normal saline over 4 hours, using tubing with a drop factor of 10 drops per ml./ How many drops per minute should be delivered?

    250ml/4hr = 62.5 ml/hr

    62.5/60 = 1.0416ml/minute * 10 drops =

    10.416 drops per minute
    You are correct yet again you don't have a problem. why are you uncomfortable?
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  3. #3
    Junior Member Cait's Avatar
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    Quote Originally Posted by Jhevon View Post
    You are correct

    You are correct again but they asked for the drops per minute, not hour. what would the answer be then?

    should the bold word be grams?


    You are correct yet again you don't have a problem. why are you uncomfortable?
    ahh because im randomly putting numbers together and have no idea what im doing >.< Putting things together that SOUND right.. but eh.. if it actually IS right is another story....


    um.. nope! it's grains not grams..



    Here's what they have about help on grains..

    Example 2:
    Ordered Tylenol 15 grains. have tylenol 160mg in 1.6 ml. How many ml of Tylenol?

    15 grains / (blank) * 60 mg / 1 grain * 1.6ml / 160mg = 9 ml



    1 grain (gr) = 60 milligrams (mg)


    does that help? :3

    ~cait
    Last edited by Cait; April 24th 2007 at 04:12 PM. Reason: adding q. Typos
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  4. #4
    Grand Panjandrum
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    Quote Originally Posted by Cait View Post
    ..


    2. Heparin sodium, 1,000 units per hour is ordered for a woman with a Blood clot in her leg. It is supplied as 50,000 units in 500ml of dextrose and water.

    a.) How manly mls per hour should be set on an infusion pump? - I got this part done.. it's

    100units/1 hr * 500 ml/50,000 units = 10ml/hr.
    50000 units in 500ml of dextrose and water, means that there are 100 units
    in 1 ml (that is 50000/500) We want to give 1000 units per hour so that is
    10 times 100 (the number of units in 1 ml), so we need to give 10 ml/hr.

    RonL
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  5. #5
    Grand Panjandrum
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    Quote Originally Posted by Cait View Post
    2. Heparin sodium, 1,000 units per hour is ordered for a woman with a Blood clot in her leg. It is supplied as 50,000 units in 500ml of dextrose and water.

    a.) How manly mls per hour should be set on an infusion pump? - I got this part done.. it's

    100units/1 hr * 500 ml/50,000 units = 10ml/hr.


    but b.. i didnt.

    b.) If no infusion pump is available, the nurse will need to use microdrip tubing, which delivers 60 drops per ml. How many drops per minute should be administered???

    I think the answer is 600drops/hr.. but im not sure.
    We need to give 10ml/hr so that is 60 times 10 drops per hour or 600 drops
    per hour. But we want drops per minute and as there are 60 minutes in an
    hour that is 600/60 = 10 drops per minute.

    RonL
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  6. #6
    Junior Member Cait's Avatar
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    Ok thanks. i got them all done now except for #3..


    3.) Morphine sulfate 2mg IV push is ordered to relieve shortness of breath in a patient with chronic lung disease. It is supplied as grains 1/4 pr ml. How many mls should the nurse administer?


    and we know 1 grain = 60 milligrams..

    so.

    I dont know what it means by "supplied as grains 1/4 pr ml..." is that like... "1/4 grains per milliliter?"

    Um.. heres what i did.. but moer than likely its horribly wrong >.<

    1/4 grain / (blank) * 2mg / 1 grain * 1.6ml / 160mg

    which turns out to be

    .005 ml

    but that seems too small??

    I dont know

    Thanks :3
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  7. #7
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Cait View Post
    Ok thanks. i got them all done now except for #3..


    3.) Morphine sulfate 2mg IV push is ordered to relieve shortness of breath in a patient with chronic lung disease. It is supplied as grains 1/4 pr ml. How many mls should the nurse administer?


    and we know 1 grain = 60 milligrams..

    so.

    I dont know what it means by "supplied as grains 1/4 pr ml..." is that like... "1/4 grains per milliliter?"

    Um.. heres what i did.. but moer than likely its horribly wrong >.<

    1/4 grain / (blank) * 2mg / 1 grain * 1.6ml / 160mg

    which turns out to be

    .005 ml

    but that seems too small??

    I dont know

    Thanks :3
    remember the objective of the method you are using. you want to put the units in such a way that you cancel out what you don't want and are left with what you do want.

    you say 1 grain = 60 mg, according to google, 1 grain = 64.799 mg, but heck, who cares. here goes. notice how i do the units so that what i want cancels out.

    .(1/4) grains.................60 mg...........15mg
    -------------.....x....------------- = --------
    .......ml......................1 grain.............ml

    So you see, the grains at the top cancels with the grains at the bottom, and all we are left with is mg/ml

    now we know how many mg there are in 1 ml, how do we find how many ml we need for 2 mg? well

    15 mg = 1 ml .....................i want to get 2 mg on the left and see what happens to the right
    => 1 mg = (1/15) ml ...........divided both sides by 15
    => 2 mg = (2/15) ml ...........multiplied by 2

    so we see, 2 mg are in 2/15 = 0.133 ml
    so that's how much the nurse should give
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