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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 gp 2.71 ooT mhuc xotenigonya anc aeucs erfe raacdli amdaeg aldneig ot ttynaphireo of yrtuematpir

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mmm21  ayOk i hitgm eb daet,erdr btu yhw i โ€™actn udetnasdrn ttha ehyt r nkaisg abtuo hte gthin ahtt is aademgd ? ๐Ÿ˜‚๐Ÿ˜‚ +8
sahusema  useiSorl!y ehT itseqnuo ysas teh" gaol fo remntatte is the itptcornoe of chiwh of eth lowingflo ttcsur"s?rue fI too mchu 2O gamsaed teh ea,ntri who si this mtrtetaen dpoupsse ot be ecetoivtpr to eht te?rain +2
ratadecalle  I kithn oot mhcu enxoyg ulwdo be hitw teh lnertiatov givnha a ihhg 2FOi geni,tts hwihc tyeh 'dnot niotenm rehe utb m'I neiugssg tthas eth tghin t'yheer nrcltioglno ot daovi nxygoe xtityc?io +2
burak  etyh dnit'd iegv teh ipetnta fi2o ,0%01 soeqtuin sask eht rneosa fro t.i utb in a yrev idustp awy +31
naught  eeptplSlanum O2 mya laos asecu ooocrlnbaurmnhyp psalsaiyd or tacianrtnlrreviu emerarghoh almge(inr ,tximra ocdleta in iventaurbcurls enzo NOT cdioohr exl)usp +1
fkstpashls  -99%52 t'nis gih,h ubt 'tsi hguneo to gte eynhigvrte esle n.daegxoeyt ucBeeas s'ti nto %010 ighh lwof het rsaniet todn' sio-zacearrvuvle dna dale ot roa/,rhgemaemadghe dna this klei .atht +1
soccerfan23  nI oehtr .w..eodrsht. ontequis is ybcailals iksang why ythe evag the tnitepa a i2fo fo 9529%- itdnsae of 01%.0 heT oernas si eebuasc 0%01 yxegno uwlod lead ot hteatyirpno fo aupryrmt.tie The oewlr 52-9%9 gnyoxe elvsle opetcrt eth eiatnr fmro ed.gaam Teh wriogdn of teh eouinqst sskuc hto imo. +3
randi  FA 0921 10p2 derun eFre lcdiara yruijn emlesxpa +
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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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hi"cnrco ghih gexyon toruaansits anc lereadyvs cffeat lgnu nda eye omeotcsu fo etmrper ianft"s.nlink

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 +0  upvote downvote
submitted by โˆ—divya(75)
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eegar thwi '.hytrkue abre ngyrti ot say tath arimypr gaol fo trnmeetat hiwt pllunaptseme 2o is to mkea ersu ether is no inerlat gm.eada

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 +0  upvote downvote
submitted by โˆ—ergogenic22(401)
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ywh is pnoittroec of eth dircoho ,upelxs ofmr nicrrtuialnterva rprueut nsayerdco ot enlmgria tairmx rgeahmhoer not a posliseb wsenar?

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whoissaad  eys msae ,oqstieun othb iyotnpather adn rrticuteanlvarin hrmgmoeea can crouc eud ot ihgh xeonyg eell..vs +
cienfuegos  I ytkaemnlis oshce doriohc xspuel oo,t sdaeb on iikw emsse hsti si omst mmcoon aceus of HIV in emrt fintasn: VIH in eht eprtmre brnia suullya eassri rofm eth agelrmin tmixar esheawr IVH ni eth etmr naifstn grnoiiesat fomr hte ocirhod .eplsxu H,oewerv it is pralytclriau nmmcoo in areutepmr nnsfait or toesh of vrye lwo hbtir e..hi.gtw ostM uvrtirrnicaletan rhoeearsghm urcco in het sirft 72 ursho aertf t.hrib Teh srki si erindesac twih use of trcxaroeorleap nmmreeba xiongeotnay ni meertpr is.ftnansto_erkbt/.gwiaaehapwne.krr:shl/erredgIiihBn/vomaitctinuaireip#/ +
burak  odrioch lsuxpe si etinrdffe hnta nemgalir irxtam +
meryen13  tilearn hermgraohe is mroe ocnmom ahtt IVH enve fi uoy hnkti taht ti dcluo dmaage oirohcd aecslp cnraeyods to lrmeiagn xmaitr eeh hgrramo.s:/bnd8gpi10m4n.16/t3wcewh.v/pw/bmutnhl.o.1i +



 -4  upvote downvote
submitted by โˆ—lilmonkey(63)
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nneyoA inragde htis uqsntoie

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