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Retired NBME 21 Answers

nbme21/Block 4/Question#33 (reveal difficulty score)
A female newborn delivered at 26 weeks' ...
Retina ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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 +8  upvote downvote
submitted by โˆ—hyoscyamine(59)
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FA pg 1.27 Too cmuh yexotoanign nac uscae eerf radclai gdamea iangled to tyterhanopi of terruampity

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mmm21  yOak i mghit be eaddt,rre utb hyw i tacnโ€™ rdstaeudnn atth hyte r ksanig about hte gnhti tath si gdaemda ? ๐Ÿ˜‚๐Ÿ˜‚ +8
sahusema  u!oireSysl eTh eitouqns syas the" ogla fo eetttmnar si het tnrtcoiepo fo ihcwh fo eht lloongfiw "resut?utcsr fI oot cumh 2O gedsmaa het enr,ait woh si shit mrtaentte eopusspd to be octripeevt ot the rt?naei +2
ratadecalle  I nhitk oot hmcu yegnox oudwl be wthi the rletnvitoa aingvh a hghi OF2i ent,igts hwhci ethy nd'to monenit eehr btu m'I essgiugn thats eht tingh yht'ere oognlcilrtn to voiad gynxoe t?yxcotii +2
burak  teyh iddn't igev het ttpeian ofi2 1%0,0 eqoistun assk eth roasen ofr i.t utb ni a rvye ptusdi ywa +31
naught  mulleappSnet O2 mya aols suaec acloopnouyrrhmbn spadylias or rrnreailcntativu meegrrhaho iralm(gne ,xmrtai tcdeola in rrinluuavbetcs nzoe OTN ocrodih splu)ex +1
fkstpashls  59%-29 n'sti ih,hg btu si't neouhg to etg viyenegthr lese enxoyeg.tda scaeBeu it's nto 1%00 ghih wfol the natiers n'dto vcruoaar-lzeevsi dan alde to amehroaheremgad/g, adn hist klie .atht +1
soccerfan23  In retoh rwoehs.t.d.. esontuiq is silabcayl sagikn yhw yeth agve eth pteinat a of2i fo 2-9%95 idaesnt of 0.%01 The enosar si uescabe 100% xegyno udwol elad ot tehptynairo of tpiumteyra.r Teh wlore 9%259- ynexgo levsel repotct hte nairte rofm ag.aemd ehT wngirod of hte niuseqto ssuck oht o.mi +3
randi  FA 2910 2p10 rdneu eeFr raaildc ujnriy xlseamep +
umpalumpa  rfmo TARNEU =aasg4a0rwudynaOst2ne0%=sih.00,D2.uan%S2ottes%/e1e7lgt/a%pxe,2e~vued%2mrh2o0ht%c2#trc%ysaiin0mse%mD0nstttaaa7xgit0;12%2tonte022x:p&w.wuhs0%n20h2e/:cha%2wvr0l%tittO:/oaarir%oShtxeen:iRIhoastg20e5%2%.ne%0P2 ervleaS tneerc edtuiss haev hsown a lopehtiasinr enwteeb a iggn-ehxoyh tsanorutai dna O.RP tI eessm htta a 9O%tS;23ag& aeenirscs hte skri ofr eesrev PRO dna ende rfo eptahry +

Wikipedia pathophysiology section of "retinopathy of prematurity" explains this pretty well. Retinal vessel maturity is incomplete in premature infants--the process of continuing this maturation in these babies is directed towards growth of vessels in O2 deprived areas, but if O2 is being supplemented, this process is hindered. Therefore when O2 supplementation is removed, excessive vessel proliferation going into the vitreous humor (not where it is supposed to be) leads to retinopathy of prematurity (defined as "disorganized growth of retinal blood vessels leading to scarring and retinal detachment")

+7/- beanie368(27)


 +2  upvote downvote
submitted by โˆ—mcl(671)
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rc"honci hihg gnxeyo suttasnraoi nac eleydasrv eftfca lngu dna eye ucsomoet fo rmptree snaf".nit kiln

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 +0  upvote downvote
submitted by โˆ—divya(75)
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geaer whti e.bthruy'ek ra ygntir ot ysa ttah pyrmiar gloa of tareetnmt wtih spellptneaum 2o is ot akem reus herte si no ltainre aedmg.a

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 +0  upvote downvote
submitted by โˆ—ergogenic22(401)
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why si crtnoepoit fo eth ohrciod les,xup mfro vretcnnrualraiti etrurup csdyernao to erianlmg iarxmt orgarhehem otn a pieolssb wr?nsea

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whoissaad  eys smae qtn,eiosu hotb taypetohinr dan irrlianvctarunet rmeameogh cna oucrc ude ot hihg eyxngo selvle.. +
cienfuegos  I emasynilkt cesho dcriooh luxspe ,oto sdbae no iikw smese iths is mtos ncomom ecusa fo HIV in trem fsan:nit IHV in het rrtpeem inarb luylsua rissea rmof het glamrein xmirat waeresh IVH in hte remt nfiasnt nsaigeirto frmo eht coiodhr ep.xusl ,reHoevw ti si cyaialtrrupl omnmco ni ereparmtu intasnf ro toesh of vrye owl btihr ihg.t.we. Mtos icrtnlvurienrtaa gearehhmros orucc in eth rsfit 27 rsuoh aeftr hr.tbi The riks is esnaiderc thwi seu of leaproocxeartr mmrnbaee eyongotnaxi ni eerrmpt innfat.sikehittnlehtwe#ei/p/rnioaeirrir_sgtra./.ngm:psedrBwiha/Iuovaakcb +
burak  oihorcd slupxe is neifdetrf htan nemiglra ixrtam +
meryen13  tlrenai egarmerohh is erom cnmmoo thta HVI eenv fi yuo nihtk htta it uldco dmgeaa cdrhooi espcal rocyesnad to ilemangr mirxat hehga emr.rol.gh.o8/nh1ttws:n.uw4m3./0id/b/pc6we1mnpvi1b +



 -4  upvote downvote
submitted by โˆ—lilmonkey(63)
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Aenony nrgeiad isht ueqitosn

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