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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 712. ooT uhmc xaoonygneit nac esauc eref driacla adamge aenigdl ot hypartteion fo rttpruyeami

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mmm21  yOka i htgmi eb erteda,rd btu yhw i atnโ€™c tdredunnsa hatt yeth r ankgis aubot eth inthg htat si egmdada ? ๐Ÿ˜‚๐Ÿ˜‚ +8
sahusema  uyiSleo!rs ehT itusenqo yass t"he ogal fo tmaenettr si hte nttopeiroc fo hhicw of eht nfiogllwo str?s"urcteu If oto muhc O2 aegsamd hte inetr,a woh si tish etatrnetm sdpupose to be rveioetctp to eht ?neriat +2
ratadecalle  I hktni oot hcum oygnex dowul be hiwt eth vnrletiaot hinagv a hgih 2OiF ,nstiteg ihcwh htey ondt' eoinmnt erhe tub Im' giesngsu shatt het nhigt rt'eeyh gnonrlloitc to daiov ynegox to?tycxii +2
burak  tyeh 'tiddn geiv hte apnttei oi2f %001, iqnsuteo sksa het sorane fro .it utb in a rvye tpudsi awy +31
naught  pneetulamSlp O2 amy lsoa eusac lnnoorhabycupomr aisaydlsp ro ritnnraurcitleav rhemergoah rl(eniagm x,amrit ldtceao in rcsurvelbuanit zeon NTO hdocroi spxel)u +1
fkstpashls  95-9%2 n'tsi ihg,h tbu ist' eonhug to get veityegrhn eles xt.odagnyee uaceBse ti's ont 0%10 ghhi olfw hte tiernsa 'dnot learivzuovra-cse dan dlae ot me/aagoerehardhg,m nda hist klei ath.t +1
soccerfan23  nI rhoet oe.wd.rh..st unqeosit is bisclaayl nsgkia hwy htye vage hte ntpetia a i2of fo %9-925 idnsate fo 00.1% ehT naesor is uaebesc 0%01 gnoyxe lwodu elad to tinyratphoe fo eatprmy.iurt Teh oerwl %2-995 yegonx levsle octrept eth intera morf daeamg. The ogwrndi fo teh utsqneio cksus tho .imo +3
randi  AF 9012 p120 nuder Free racdali riyjnu amxlseep +
umpalumpa  ofmr TERANU R:tto/xewPl2ectsue%ai%%t%dattn=nxa%p%ho4htn2iuaeeiwI220oih/7s0il2a20p%eD.rtOmi%n2n:%0:Dx,%h2e7adyt1%ryt.nott0ain.c:n0exh0so%ca0,1a/mew/wr;2~v0agev0rhgasa0Oar2stS0=e&s2m2522nht0t#t2ue%s2grt2g%o%ahes%S0s.ue l aeervS tencre stideus hvae sohnw a lpohasieintr neewtbe a nxieh-yhogg srtanuiato and RO.P tI sesme tath a O%t;ag329&S nrsaeseci eht irks rof rveees POR nad nede orf atrheyp +

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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io"nhrcc ghhi exygon snaitrousta nca yaesldrve feacft glnu nad eye soumteoc fo eprmetr t"ns fai.nknli

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 +0  upvote downvote
submitted by โˆ—divya(75)
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aereg wtih bkyueh .t'arer iyngrt to sya hatt ampryir goal fo mterentta ihwt tpmnuepsllea o2 si ot akem rseu teehr is on artline egdm.aa

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 +0  upvote downvote
submitted by โˆ—ergogenic22(401)
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hyw si opctoitern fo eht ioocrdh pexsul, fomr nirnarievtlcrtau erupurt aosyrendc ot gnrimael imatxr erhermhaog otn a sesliobp enwrs?a

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whoissaad  yse smea seo,uiqtn bhot hreonaptity nad eitarunlarcrinvt rogeeahmm nac cucro ued to hhig gyxeno llv.es.e +
cienfuegos  I mtlyiaknse scohe ihocrdo epsulx o,to sbaed no iwik essme isht si stmo ocomnm eusac fo IVH ni rtem ftians:n IHV ni hte eprmrte rbani uyaulsl isesar omfr eht imnearlg rtamxi seerawh IVH in the ermt nnafsit ietarnosgi morf het oorhcdi sleupx. ,Hereowv it is ltaycpualirr nommco in aermertup itfnnas or hoset of ryev owl tbhir i..g.hewt tosM ravitnltucaerirn herrgsahoem urocc ni eht rfist 27 rohsu tfear b.rith eTh rkis is acsndreei ithw eus of oraletcpxrorea eerbmamn agtiyxoenno ni ermpret sntnfi a.iv.i/lri/kcswat#pe_/arerroswbpdtinIntiaheBte/aeerh.iokimgrauh:gn +
burak  oiorhdc xsulep is ffrneetdi hatn laeinrmg iarxmt +
meryen13  enatlir eehgrrmhao is meor monomc htta HIV vnee fi oyu inthk tath it oclud gaadem dirocho sacelp arodenycs ot laenmrgi mxrtia hea.ehrorg mhb8vh.063wnnl4ept1nu/.cwmd/itbm1wgi:/.pso1./ +



 -4  upvote downvote
submitted by โˆ—lilmonkey(63)
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eAnyno nardieg htis neituosq

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