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Comments ...

 +21  (nbme23#15)

Maintenance dose formula is (CssCltau)/F where Css is steady-state target plasma conc. of drug, Cl is clearance, tau is dosage interval & F is bioavailability.

Neither dosage interval nor bioavailability is given, so ignoring those & plugging in the numbers (careful to convert units to mg/kg/day): (12 ug/mL * 1 mg/1000 ug) * (0.09 L/hr/kg * 1000 mL/1 L * 24 hr/1 day) = 25.92 mg/kg/day

...which isn't any of the answer choices listed. They must have rounded 0.09 L/hr/kg to 0.1 L/hr/kg, and doing so gives exactly 28.8 mg/kg/day (choice C)

lispectedwumbologist  That's so infuriating I stared at this question for 20 minutes thinking I did something wrong
hyoid  ^^^^^
seagull  lol..my math never worked either. I also just chose the closest number. also, screw this question author for doing that.
praderwilli  Big mad
ht3  this is why you never waste 7 minutes on a question.... because of shit like this
yotsubato  Why the FUCK did they not just give us a clearance of 0.1 if they're going to fuckin round it anyways...
bigjimbo  JOKES
cr  in ur maths, why did u put 24h/1day and not 1day/24h? if the given Cl was 0.09L/hr/kg. I know it just is a math question, but i´d appreciate if someone could explain it.
d_holles  LMAO games NBME plays
hyperfukus  magic math!!!!! how TF r we supposed to know when they round and when they don't like wtf im so pissed someone please tell me step isn't like this...with such precise decimal answers and a calculator fxn you would assume they wanted an actual answer!
jean_young2019  OMG, I've got the 25.92 mg/kg/day, which isn't any of the answer choices listed. So I chose the D 51.8, because 51.8 is double of 25.9......I thought I must have make a mistake during the calculation ......
atbangura  They purposely did that so if you made a mistake with your conversion like I did, you might end up with 2.5 which was one of the answer choices. SMH
titanesxvi  I did well, but I thought that my mistake was something to do with the conversion and end up choosing 2.5 because it is similar to 25.92
makinallkindzofgainz  The fact that we pay these people 60 dollars a pop for poorly formatted and written exams boggles my mind, and yet here I am, about to buy Form 24
qball  Me after plugging in the right numbers and not rounding down : https://i.kym-cdn.com/entries/icons/original/000/028/539/DyqSKoaX4AATc2G.jpg
frustratedllama  Not only do you feel like you're doing sth wrong but then that feeling stays for other questions. sucks so baad

Subcomments ...

submitted by docred123(3),

Can anyone further explain this?! I could eliminate a few item choices and I guessed correctly, just need more information! Thanks

wired-in  Patient has 5 yr h/o hep C, so it is chronic. Chronic inflammation is characterized by presence of lymphocytes & plasma cells while neutrophils is more characteristic of acute inflammation (Pathoma Ch. 2). AFP is within reference range so probably not HCC. Choice D, palisading lymphocytes & giant cells suggests granuloma which isn't typical of hep C. +25  
almondbreeze  Fa2019 pg 215, 217 on acute/chronic inflammation +