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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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Flow Rtea = eotcVyli x tnecrClaso-oSis Aare

2 mc2^ x 02 sec/mc x 60 mc/nesi x 1 00,L1/0 mc3^ = 2.4 /iLnm

10,00 mc^3 = 1 L

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seagull  ,eWll I miseds sith n.eo I nod't nvee efle d.ab +78
link981  m@ynekcoypa a lmasl pyo,t 001 m^3c = 1 L otn 3^010cm0. 0 100 =^m3L 1 L +1
hello  on@yeyakcmp ohw did uoy edit uory oianglir ncmomte ot ifx ouyr pot?y +1
winelover777  Ptyert esru oyny@akmcep asw crtcr.eo 1 L = 1000 c^m3. eeihwrOts teh swnrae dolwu eb 4.2 +4
drdoom  1 ermnetitec si a eacitd.ns (A lnie). +1
drdoom  fI we lyptlumi a enli yb tehaonr en,il we tge a rfucase eaa.r (A pceei fo ar.pep) +1
drdoom  fI we ypltimlu the iepce of eprpa yb troehna lne,i ew teg m.evulo A( ue.bc A b.ox) +1
drdoom  fI ew fill hte obx thwi a lfuid, ew ilwl evha 1 mL of tsih dil.uf +1
drdoom  fI we avhe a sntohdua of tehse osbe,x ew have 1 L fo ful.id +1
drdoom  1ooo, mL = 1 rLite = 1o,oo eemttic³rne +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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I've rvnee ebne oogd ta nnvroetcgi nusit :( oll os dah ot aks ym brrh.eot He otdl me tt:ha

cdetansi × dtisecan = aiscndet2 = eaar

,adn

cnsaetid × scainetd × ensadict = ncsdtaie2 × natcides = aecsndit3 = mvueol

taoGt lvoe bcupli ohoscl for erenv neeb gtauht atht ... eesgh luiosybvo( Ive' doen eth ionaetusq dna tuff,s stuj rnvee bnee tdol ti atht athwtay/ ismelp fee).bor nKinogw that kamse iirunfgg out het aequtoin cmhu seeari:

Fwol reat = icvleoyt × CSA = 20 em/csc × c2m2 = 04cm3/ces

To croevtn to /L,nmi jsut yt:umillp

m04c3e/cs × 60 nm/ecsi × 10/m0Lc,013 = 2004 01L/,00 imn = 24. Lm/ni

Hpeo tihs p!lehde

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impostersyndromel1000  to all ym ubilcp hlosoc eepps tou rtehe and( ton teh cien ilupbc chsloso in chri ase,ar eht lrea lucibp ho.)csosl.. we edma !it +4
angelaq11  nkulhTyafl I wsa athgtu ohw to rtvoenc t,iuns tbu elt em ltle uyo thta I swa SO tslo no hist n.oe s'tI UESSLES ot konw how to od ti if uoy (I, I aenm )I dotn' oknw eht ndam fomlrua xD. lObyovsiu got thsi noe r,wong but is't doog to wonk thta fi ti eerv sceom pu aniag dan( I kwno it wo'n)t I eaalyrd 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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U,hg os,ryr gtitgne udes to the gri,tmafotn nda ltyliaacdecn sedpto it ni teh worgn lpe.ac

,yAysnaw ot e,rtereati I awalys jtus ookl at eth t.sniu It nswat iL/,mn mI' given m^2c nda s/cemc

So I piltuylm, to gte elvmuo uto fo it ),m3(c^ then nocterv soesncd to smi.ntue

sTuh, tis' blyaclsai xx622, in oems aepsh or mfro etfar ilacgnp eht samiecld epaopaiylrpt.r doGo ghitn teyh did'tn add atht rrtaluciap ,klirwne llI' etka my alrdemei amht ilslsk adn bug uot, ..aahh.

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 +1  upvote downvote
submitted by googaga(2)
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sTentig gttinse 32.1 hsTi is a etts spto to ees if sitngh un csamr elb yb pitngy a tmmocne. .khasnT

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drdoom  i ctesrep tsih teamttp tbu i tno'd kinth ti sokrw thta yaw +2


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 +0  upvote downvote
submitted by ∗usmleboy(19)
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iThs tuieqosn was no my ACMT nda I uheladg nhwe I saw .it

gTsnih uoy aegv ot wo:nk c3m^ = Lm , tneh how ot cortvne s.niut

22^cm x 02 mcc/es = c^4m03 / ces = 40 Lm / ecs

moFr hree jsut rnocvte 40 mL / sec ot L / mni

04 mL / cse x 1 L / 0100 Lm x 06 sec / 1 utmien = 42. L / imn

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 -1  upvote downvote
submitted by ∗kernicterusthefrog(139)
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Just ni case tath loelyv tietll oqeauitn prodvedi by okycame@nyp ws'nat etqui gneouh for oy,u 'rehes a kiln to a meor oetmcelp neapoxtinla yb hnKa mcaeAd.y dleHpe e,m whne I kedolo at the qnaetiuo dan dias, a?aahwa

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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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