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Dose calculations in FA (b/c I'm a dumbass)

Discussion in 'Step I' started by Taus, Mar 23, 2007.

  1. Taus

    Taus . Moderator 10+ Year Member

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    OK..I'm a dumbass and have a pretty basic question..

    On page 210 they have the formula for calculating loading dose as: Cp x Vd / f

    Is it (Cp x Vd) / f or Cp x (Vd/f) ?

    I remember the "PEMDAS" mnemonic from highschool and think its the first way w/ multiplying first....but I'd appreciate if someone could chime in on this.
     
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  3. surprisedgirl

    surprisedgirl 2+ Year Member

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    Oct 11, 2006
    i believe its the first
     
  4. domer621

    domer621 MS4 5+ Year Member

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    surprisedgirl is correct.
     
  5. Taus

    Taus . Moderator 10+ Year Member

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    hmm...taking a look at some practice questions Qbook has it the 2nd way and Katzung in the Lange Qbook has it the first way....wtf...
     
  6. surprisedgirl

    surprisedgirl 2+ Year Member

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    i havent studied that stuff nor have i looke dat it since last year but im pretty sure thats how i remember it.....and that seems right anyway
     
  7. mountainman123

    mountainman123 Guest

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    Jul 18, 2006
    Yeah I remember trying to figure that out and they both give the same answer if you plug in fake numbers and solve (I think...... too lazy to do it right now)
     
  8. lord_jeebus

    lord_jeebus 和魂洋才 Moderator Physician 10+ Year Member

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  9. Taus

    Taus . Moderator 10+ Year Member

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    thanks
     
  10. joe6102

    joe6102 by the power of grayskull 5+ Year Member

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    socal
    Yes.
     
  11. SeventhSon

    SeventhSon SIMMER DOWN 7+ Year Member

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    MDApps:
    it so happens for that expression a x b / c the order of operations is irrelevant
     
  12. myershurt

    myershurt 7+ Year Member

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    Sep 13, 2006
    exactly as above - mathematically speaking - multiplication and division can be used together in any order - just plug in random numbers and you will see that the dose comes out exactly the same no matter which operation you do first...
     

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