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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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oFlw Reta = telcioVy x cC-esolnsoaSitr Arae

2 m2^c x 02 cc/sme x 06 cnes/im x 1 0L,/010 ^cm3 = .24 n/miL

100,0 c3m^ = 1 L

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seagull  l,Wel I esdmis tish .neo I 'dnot vene efle dab. +78
link981  m@cyepykoan a lalms py,to 100 ^3cm = 1 L not 0^c00.13m 1000 ^m=3L 1 L +1
hello  meyp@onkyca who ddi yuo diet ruoy inigoral mtncmeo to fxi oruy ?toyp +1
winelover777  yePtrt esur oyy@ekapcnm swa .ceortrc 1 L = 1000 c3m^. wtehriOse eht nsawre wdluo eb .24 +4
drdoom  1 tecmetenir is a ncitsae.d (A )nie.l +1
drdoom  fI we ltlyimpu a inle yb tahreon l,eni ew gte a scruafe r.eaa (A epeci of preap.) +1
drdoom  If we lpumtyil eth ieepc of appre by htonera len,i ew teg um.veol A( .ceub A x.b)o +1
drdoom  If ew ilfl het box hwit a ifud,l we lliw veah 1 mL of hits l.iduf +1
drdoom  fI we aevh a uhsandto fo stehe ,sbxoe we veha 1 L of l.idfu +1
drdoom  oo1o, Lm = 1 rLeti = ,ooo1 meienttc³re +1

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



 +6  upvote downvote
submitted by nwinkelmann(366)
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ve'I vnere bnee godo at ovtecringn stuin (: oll so adh ot sak my o.rbhtre He ltod em t:hat

daencsti × cetdinsa = isactdne2 = eaar

ad,n

cnsieadt × nsceitda × ectsdian = cnasedti2 × edtnisac = eadtcnis3 = eloumv

aGtot eovl cuilpb oohlcs ofr vneer enbe uhagtt hatt ... heseg liobov(ysu v'Ie done eht qsaounite and fsftu, utjs rneev eenb odtl it atht atawyht/ liesmp befor.e) wKginon thta kamse fnuigrgi uto hte auintqeo cumh :eerias

olFw rate = oeyltcvi × SCA = 02 sccm/e × m2c2 = 0mc43sc/e

To vrcteon ot i,nLm/ tujs :iultpmly

40cm3e/cs × 60 ec/insm × 0c1/00,m1L3 = 4200 L,01/00 min = .42 im/nL

peoH itsh !ehpdle

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impostersyndromel1000  to all ym upbilc closoh ppese out ehret nad( nto teh cine bulicp soochsl in rcih ar,aes hte ealr uilbcp l)ss.ooch.. ew deam ti! +4
angelaq11  aylnuhTflk I swa uttagh how to trvncoe tnui,s but let me ltle oyu ttah I saw SO otls no this .one Is't USSSEEL to wnko owh ot od ti if you I,( I name )I ndto' ownk the adnm rlafmuo .Dx blyousviO tgo iths eno wogr,n but t'si gdoo to ownk thta if it eerv oecms up gnaia (nad I nokw ti w')ont I ralaedy wokn .it +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)


 +2  upvote downvote
submitted by seracen(15)
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gh,U r,ryso gtgtine udse to eth intm,afrotg and cteyianallcd pdtseo ti in hte wnrgo le.apc

,snyayAw to eiatrre,et I alyaws jtus olok at eth n.usit It santw Lin,m/ mI' ivgne c2m^ nad mcc/se

So I plyulmti, ot get umelvo out fo it )^c,m(3 etnh tonevcr dcensos ot is.utnme

ush,T ist' slblcayai x,22x6 in oems aseph or mrfo taref ipgncla eht lmcsaied yaaeitr.loprpp odGo htngi they dnt'id dad taht paircurlta r,ewnlki Ill' eakt my ilreaedm math isllks dna gub tou, ..ha.ah

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 +1  upvote downvote
submitted by googaga(2)
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gitTens intgets 23.1 hTis is a etts spot ot ese if ithgns un crmsa lbe by ingtpy a .cnometm hTs.nak

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drdoom  i cpertes tish pmttate utb i ntdo' nihkt it roswk taht wya +2



 +0  upvote downvote
submitted by usmleboy(19)
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sTih uoetnisq was on ym CMTA nda I ghalude wehn I wsa t.i

hiTgsn uyo evga to w:okn m^3c = Lm , neth owh ot evnctro isntu.

2cm^2 x 20 ccesm/ = cm0^34 / cse = 40 mL / ecs

Fmro rhee tsuj ecvrton 04 mL / cse to L / mni

40 Lm / sec x 1 L / 0100 mL x 06 ces / 1 etumni = 2.4 L / nmi

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 -1  upvote downvote
submitted by kernicterusthefrog(139)
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Jstu in aesc hatt eylolv ttllei atnqoeui divdreop by o@ecypnyakm 'ntswa iqteu unogeh rof y,uo re'hse a klni to a mroe eocmpetl ilnaatnpeox by hnaK Ame.yacd plHeed me, enhw I kdooel ta hte etiuqano nda is,da h?aaawa

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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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