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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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owFl Rtea = yoVlteic x stinocrso-aCSel eAra

2 2^mc x 20 cse/mc x 06 m/cnsie x 1 /L000,1 m3c^ = 4.2 /imnL

0010, c^3m = 1 L

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seagull  eWl,l I esdsim tshi .oen I t'dno eenv eefl bd.a +78
link981  nopye@yakcm a lsmal o,ytp 010 3c^m = 1 L ton 00.mc13^0 0 100 3m=^L 1 L +1
hello  mpkya@ecyno hwo ddi uoy etdi yrou lnragoii ctmenom to xif uyro tpyo? +1
winelover777  tytePr esru cmpyayokne@ wsa rtrocec. 1 L = 0001 3c.^m ewOheirst het raesnw uwodl eb 2.4 +4
drdoom  1 tneteercmi si a aisne.dtc A( )nel.i +1
drdoom  If we tmlilpuy a enil by raothen l,ine we etg a safecur ae.ar A( ipece fo pa.r)ep +1
drdoom  If ew tlyilmup eth pieec of pepar by ehatrno e,iln we etg euml.vo A( ue.cb A .xo)b +1
drdoom  If ew ifll het xbo tihw a iufld, ew lwil vahe 1 mL fo hits ud.fil +1
drdoom  fI ew ehva a dnatuhso fo heset oex,bs ew hvae 1 L of u.dlif +1
drdoom  o1oo, Lm = 1 eriLt = oo1,o eecetrt³imn +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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e'vI envre eenb doog at cnrvgoetin inuts (: lol os had to sak my bohtr.re He dlto em tath:

dceatsni × ictaensd = cadsneit2 = eaar

,nda

cinasted × sntcaide × esndctai = cntasdie2 × inctesda = ecdsntia3 = vouelm

tGtoa evol upblci ohlcso orf envre ebne httgau htta ... segeh lobvos(iuy ev'I ndoe hte naqtuoeis dan sfft,u sjut eevnr eenb odlt it ttha hyaaw/tt plseim rf.)eeob noiKwgn htta amske fnrgiigu uto hte anueoiqt hcmu raeis:e

Fwlo aret = ivoclyte × ASC = 02 smce/c × c2m2 = 04cm3e/cs

oT tnvrceo to m,/iLn ustj ltmulip:y

0c4m3ces/ × 06 n/emcsi × 1/m010,L0c3 = 2040 L,0/001 nim = .24 nLi/m

oepH isth eephl!d

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impostersyndromel1000  to all my biupcl oholcs sppee otu erthe d(na not the einc uipbcl ocsshlo in rhic ,esraa the rale iclbup locs.)ohs.. we mdea !ti +4
angelaq11  ullafkyhnT I asw guhtat woh ot enrtcov stiun, btu tle me llte yuo hatt I swa OS lots on this noe. tIs' SESUSLE ot nkwo how ot od ti fi uyo ,I( I eanm )I odnt' wnko the nmda uforaml .xD suovilyOb tgo stih noe wg,rno utb tsi' odog to oknw tath fi it erve ocsem pu naiga (dan I wkno it t)o'nw I yaralde wkno .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)


 +2  upvote downvote
submitted by seracen(15)
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gh,U ,soyrr gtigtne eusd to eth tnmtrai,fog and aadlecclyitn dstope ti in het orgwn lpc.ea

sAyyw,an to trirteaee, I alswya sutj olko ta eth sitnu. tI twsna nLi,m/ 'mI ngive ^c2m dna sc/mce

oS I myltplui, to tge uevolm otu of it )(m,3^c nteh cteovnr cdsoens to ts.iuenm

Tsuh, t'si ibaylascl ,2x62x ni moes pehsa ro fmor feart gplacni teh aemdilsc ra.apyitrpelpo doGo ignht yteh tdnd'i add thta lutparirac nrelk,iw llI' ktea ym aimeldre hmat lsksil dna ugb o,ut ha.ha..

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 +1  upvote downvote
submitted by googaga(2)
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ntgsTei ttinesg .213 siTh is a ttse stop to see fi thgsin nu scram ble yb pnyitg a tem.comn ka.nsTh

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drdoom  i erptsce sthi ptemtat utb i od'nt nihkt ti oskwr atht ayw +2



 +0  upvote downvote
submitted by usmleboy(19)
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iTsh ouqntsie saw no ym TACM dan I edghula hnwe I was it.

ghiTsn you gaev to k:onw ^3mc = mL , nhte woh ot etvconr .utins

^mc22 x 20 cc/mse = ^340mc / sec = 40 mL / sce

rFmo heer stuj vrceotn 04 Lm / ecs ot L / nmi

40 mL / ces x 1 L / 0100 Lm x 60 esc / 1 muietn = .42 L / mni

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 -1  upvote downvote
submitted by kernicterusthefrog(139)
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sJtu ni asec ttha ylovel ltlite onteuaqi dopirved yb eoayn@cpmky n'tsaw tequi enhoug fro you, rese'h a nikl to a omre eocpemtl noaiplnaxte yb nKah c.deaAmy edpeHl e,m wnhe I ooekld ta eth tqaeionu adn dsa,i a?ahwaa

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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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