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Retired NBME 22 Answers

nbme22/Block 1/Question#9 (reveal difficulty score)
A 54-year-old man has an aneurysm in the ...
2.4 🔍 / 📺 / 🌳 / 📖
tags: calculation

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 +17  upvote downvote
submitted by ∗keycompany(351)
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woFl eatR = loceitVy x soclSs-rtiaeoCn Aear

2 cm^2 x 20 /eccms x 06 /meisnc x 1 L/0010, ^cm3 = 42. mn/Li

,1000 ^3mc = 1 L

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seagull  W,lle I dessim ihst eno. I tond' eevn lfee .abd +78
link981  kycm@npeaoy a lslam ytpo, 100 ^3mc = 1 L otn 0c.^m0013 0001 3mL=^ 1 L +1
hello  peankc@myoy how idd oyu tdei uoyr onalirgi mtncoem ot ixf oryu y?pto +1
winelover777  yetPtr sreu yopakc@neym asw ercotrc. 1 L = 1000 .^m3c twiereshO het nwresa oulwd be 24. +4
drdoom  1 nectiermte si a nseadcit. A( n.eli) +1
drdoom  If ew pilmyltu a elni yb aoehnrt e,nli ew get a sufaerc rea.a (A cpeei fo prea)p. +1
drdoom  If ew luimylpt eht cpiee of eppar yb hetnora n,lie ew etg e.moluv (A cbue. A )bo.x +1
drdoom  fI we lfil eht obx ithw a dful,i ew llwi heva 1 mL fo itsh .duifl +1
drdoom  If ew aehv a ntshaudo of seeht ,ebosx ew eavh 1 L fo l.idfu +1
drdoom  oo,1o mL = 1 Ltier = 1,ooo ³etceitremn +1

if one still doesn't understand to add on .. 1000 cm^3 = 1000 ml 1000ml = 1 Litre

+5/- ribosome01(-3)

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 +6  upvote downvote
submitted by ∗nwinkelmann(366)
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eI'v eenvr nebe dogo ta gvieorntcn tsiun :( oll so ahd ot sak ym ro.rbeht eH oltd em tat:h

endactis × cinestda = ndeascit2 = aaer

a,dn

dsnetiac × atcsdeni × cedatins = dactsine2 × dteisacn = cdiesnat3 = lmveou

ottaG vloe iuclbp shoolc rof eernv eben ahuttg thta ... esegh ilsoboyuv( e'Iv deno eth aoeuinqst dna ,fsfut sjut nerev nebe lotd it htta ayw/taht limeps efro.e)b gnKionw ttha kamse fggiruni otu the eqtnuoia much s:reaie

wlFo rtea = lioyvetc × SAC = 02 mscce/ × 2mc2 = c40m3/sec

To etrocvn ot ni,/Lm tusj yl:ilmput

m04c3cse/ × 06 in/cmes × Lm,100/10c3 = 0420 /L0001, nmi = 4.2 /mLni

oHpe this dehepl!

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impostersyndromel1000  ot all my upibcl holcso pseep uot etrhe (nad nto teh iecn pciubl ooscslh ni irhc eaars, het arle ipclub os..cos).lh we eadm it! +4
angelaq11  lyafkulThn I aws gttuah ohw to rteoncv tni,us tub lte em llet uyo htta I swa OS lsot on sthi e.no tI's EESUSSL ot wnok who to od it if uoy (I, I mane I) 'tndo wkno hte namd aolfumr .Dx sOuyvlobi tgo itsh oen o,wrgn tub 'ist doog ot ownk thta if it eerv ecmso pu inaga a(dn I wkno ti t)n'ow I raladey nowk .ti +2

This is all you need for conversions:

1cm3 = 1 ml ... thus 40 cm3 = 40 ml

So to make it faster I would do it like this

40 ml/sec * 60 sec/1min * 1L/1000ml = 2.4 L/min

+3/- majoav1(2)

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 +2  upvote downvote
submitted by seracen(15)
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h,gU osr,yr ienttgg dsue to the nogimftat,r nda niaycetdlcla epsotd ti in the onrgw lc.ape

ynaA,ysw ot ei,teetrra I syalaw tjus ookl at teh ntius. It atwns i/,nLm I'm veign ^2mc nad ec/cms

oS I llpuiym,t to gte evlmuo tou of ti ),^3m(c nhte ntvrceo scesnod ot siuten.m

u,Ths si't llbsaicay ,62x2x ni soem haspe ro form rtfae npcliag eht lcmdiaes tropilrpyp.aae dGoo ignht htye i'ndtd dad htat putlraaicr k,lrniwe 'llI ktea my emreidal athm klissl nda ubg u,to .haha..

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 +1  upvote downvote
submitted by googaga(2)
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steignT stntieg 321. hiTs is a tset opts to ees if gthnis un mracs elb yb itgnyp a m.cmneot akshnT.

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drdoom  i prcseet tshi tetapmt ubt i 'dont ihnkt it rkswo that ayw +2


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 +0  upvote downvote
submitted by ∗usmleboy(19)
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shTi ituosqen swa no ym CMTA nad I hlgaude wnhe I was it.

hngsiT yuo aveg ot kwn:o cm^3 = mL , hnet ohw to vnetorc tius.n

2^2cm x 02 mcsc/e = 4m0c3^ / sce = 40 mL / sce

omrF ehre tsuj ctveorn 04 Lm / ces ot L / inm

04 Lm / ces x 1 L / 0010 Lm x 06 sec / 1 inuemt = .42 L / nmi

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 -1  upvote downvote
submitted by ∗kernicterusthefrog(139)
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suJt ni seac htta llvoey etltil ouiqnate rveodipd by pmacoyyenk@ w'stna itueq egounh ofr yuo, 'heser a nkli to a reom elmtopec aenoxanlpti by nhKa .eAamydc Hpedel me, ewnh I okldoe at eht anueotqi adn sdai, a?aahaw

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If, like me, you dislike memorizing formulas, but are okay doing the actual math, I always just look at the units. It wanted L/min, and I had to get it using cm^2 and cm/sec...

Well, I know cm^3 gives volume (L) after bashing out a few conversions, so multiply it is!

Then I know to turn seconds into minutes, so multiply by 60.

Now, at this point, I knew my decimals were off, but still, 4x6 = 24, so it's some version of that. Had they included 24 or .24 as answers, I'd have actually had to pay attention to my conversions.

Anyways, I hope that helps!

+4/- seracen(15)

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