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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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wloF eatR = Vtyociel x slCa-Sotncoiers Aera

2 2mc^ x 20 ccm/se x 06 e/imsnc x 1 /0L00,1 m3^c = 4.2 miLn/

0010, m^3c = 1 L

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seagull  e,llW I imessd ihst oen. I don't veen lefe .adb +78
link981  ympncyo@eak a lmlsa y,pot 010 ^cm3 = 1 L not 0m3^0.c01 0 100 m3L^= 1 L +1
hello  ypean@yckmo hwo did yuo diet ruoy iioanrgl cmmtnoe ot fix uory tyop? +1
winelover777  tyPter resu cypkenamoy@ swa ecotrcr. 1 L = 1000 m.^c3 wtOiheres eth swerna uowdl eb .42 +4
drdoom  1 tieemctenr is a eads.cnit A( .ein)l +1
drdoom  If ew ulilyptm a enil yb toahnre neli, ew get a afrcsue e.ara (A eepci of ap)r.pe +1
drdoom  If ew iltlmuyp eht epcei of pepar by areonht enil, we gte ul.eomv (A ucb.e A b.xo) +1
drdoom  If we flli eth xob wtih a diful, we ilwl ahve 1 Lm of hits ifl.du +1
drdoom  If ew evha a tondusah fo ethse eb,oxs we aevh 1 L of l.ifud +1
drdoom  ,oo1o Lm = 1 eitLr = o1o,o e³intcrteem +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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vI'e enrve been doog ta ercvntoign nutis (: lol so adh ot aks my ebrtroh. He tlod em h:tat

sidetnac × tdscinae = ticendas2 = reaa

,nda

dscetani × dnacteis × aicndets = idsceatn2 × nsitecda = ancesdit3 = ovumle

ttGao ovle iupcbl hslcoo rfo enrev been htaugt ttha ... heesg ooibyvul(s e'vI onde teh tsiunoqea nda fstu,f juts vnere eenb otld it ahtt /twaayht mspile boe)er.f gnnoiKw atht aksme riggfuni otu teh iqaeuotn uchm ase:eir

lowF trea = icveylot × CSA = 20 /cesmc × 2mc2 = 04cm3cs/e

To cotvern ot L/min, stju putmli:ly

04cm3/cse × 06 cesin/m × ,/01cm1L003 = 0420 ,L00/10 nim = 2.4 miL/n

eHpo hsit hlepe!d

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impostersyndromel1000  to lal my pculbi hcolso ppese out rheet n(da tno eth cein ulpcib olhscos ni rihc s,reaa het aerl plcubi )hcl.s.oos. we eamd i!t +4
angelaq11  luflhaTynk I swa httgau owh to rtvnoce u,sitn tbu etl em llte yuo htta I swa SO tlso on shit e.on It's EUSSELS to wkno ohw ot do ti if you I(, I mane I) notd' nokw hte nadm umfroal x.D isloubvyO tog ihts oen w,gorn utb st'i doog to wonk ttha if it vree cemso up gaain a(nd I kown it not)w' I ayedlra okwn 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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hgU, rrso,y itgngte esdu ot het oatrnit,gmf adn ecctyaldinal soptde it ni eth ogwnr c.laep

wAnsyy,a to re,etiarte I awayls tusj olko ta het us.int It ntaws ,Ln/im Im' vneig m^c2 nda /cescm

So I ,lluiytmp to get meuovl otu of ti 3(c,^m) nhet ectnovr dcneoss to sin.tuem

u,shT is't yasabclli 2x26,x in omse easph ro frmo aftre igncapl eht mdlcseai oyeliratp.prap oGod gthin hyet ti'ddn dad that paaulirctr l,knwrie Ill' ktae my eriemadl tahm lsliks dan ubg uo,t aahh...

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 +1  upvote downvote
submitted by googaga(2)
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Tenitsg esnittg .213 This is a tset psot to ese if ihsntg un mrcas ebl by nyigpt a otmne.cm sT.nahk

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drdoom  i terespc htsi atpetmt btu i tn'do nkthi ti krosw tath wya +2


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 +0  upvote downvote
submitted by ∗usmleboy(19)
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hTsi ieqnstou swa on ym CTMA dna I guealhd hwen I asw t.i

sThngi uyo eavg ot kwno: mc^3 = mL , etnh who ot conterv stu.ni

^2m2c x 20 sm/cce = 3c40m^ / sce = 04 Lm / esc

oFmr erhe utsj ovtercn 40 mL / ecs ot L / imn

40 Lm / ces x 1 L / 1000 mL x 06 esc / 1 mnteiu = 24. L / min

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 -1  upvote downvote
submitted by ∗kernicterusthefrog(139)
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tsJu in saec htta veyllo tietll noqaetui oevrdpid yb mcnpy@oykea taw'sn tiqeu oehugn ofr ,uyo rsee'h a lkni ot a more cmeltpeo iaanlntexop by haKn edmayA.c deHepl em, nhwe I kdeloo ta eth iatnoqeu nda dai,s ahawa?a

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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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