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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 127. Too chum ingxtaeonyo cna ecusa feer lcirada gaedma leginad ot pthteanoyir fo yraetuiprmt

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mmm21  yOka i gimth be der,rdaet utb wyh i tancโ€™ dnudsnrtea ttha hyte r gsnkai tauob teh ithgn ttah si dgaemad ? ๐Ÿ˜‚๐Ÿ˜‚ +8
sahusema  erouS!ilys heT sqoituen yass eht" lgoa of tnaetermt is hte noorpettci of iwhhc fo eth gionflowl ttrr"ceusu?s If oot mchu O2 dmaesga teh it,eran hwo is htsi tatretmne opspedsu ot be epetvotric to hte taenri? +2
ratadecalle  I thnik too uhmc nyxego wloud be iwht teh ranvotltie ngivah a ghhi 2FiO teit,sgn ihchw yhet dton' onmenit eerh tbu I'm iuensggs sttah hte nihtg htey're gnonlrlcoit ot vioad exygon ?oicytxit +2
burak  teyh dtdni' evig eht ttnpaie ifo2 0,01% tniusoqe asks hte osnrea rfo .it tbu in a eryv tidpsu way +31
naught  pmntSeullepa O2 yma laso caseu obpmlonourhryanc psdasaiyl or ciraiuarelvtntnr hgrhereamo nle(arigm ,mritax oaeldtc in eirbtrculasvnu ozne TNO irhodco pelxsu) +1
fkstpashls  59%2-9 nits' h,igh but tis' gheoun ot tge gtvhrnieye lsee oy.gtnxdeea saBucee 'sit nto 010% high ofwl eth inraets dont' alru-oaviesvrcze and deal ot rhha/medaoeea,rggm nad ihts ielk aht.t +1
soccerfan23  nI rheot rot.ed.h.w.s oiusneqt is aaylibcls kangis yhw yhte vgea eth tneaipt a f2oi of -952%9 dnaiset of .%001 hTe osnare is esbaeuc %010 yexngo lowdu edal to onrtetpyaih fo uitarerp.tmy heT lroew 5%92-9 oygxen lvlese pctreto hte etianr mofr aadeg.m hTe wriogdn of het siuqeont cskus tho im.o +3
randi  AF 0921 012p rnued reFe aacdilr rynjiu almxesep +
umpalumpa  ofrm NUTARE PDxtsst10lan;tsm507hot0ge202uvr2r2e:0ti&2n/guis2eiSrthmae%=o%%#teg/hxy/eueoihy2a.s0dn%0.:ta%soe0x2n%e0tanmxtnhRhn200an%are%tva0wdat2cwiO%.%7t12aSosnO2t2.%:etp2we2Ieht,ilssr%g%c%20ueaaowchp~0%a/%,i4:rt=2aD rael Sve erecnt tedsusi eavh osnhw a eriapstohnil tweeebn a eonhxhggyi- utinrstoaa dna RPO. tI eesms tath a &a%SOt29g3; aresscnie the kris ofr eevrse RPO dna dnee orf phayert +

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)

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 +2  upvote downvote
submitted by โˆ—mcl(671)
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crih"cno high yengxo outntsrasia cna vsedyreal ctfefa ngul adn yee muocoest fo mrterpe ".asin tfnkiln

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 +0  upvote downvote
submitted by โˆ—divya(75)
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agere hiwt eau r'rtkybe.h yirntg to ysa that ymrpair loag fo tetmertna iwht epmlnteplsua o2 is to aekm resu ehert is on raiteln aamdeg.

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 +0  upvote downvote
submitted by โˆ—ergogenic22(401)
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wyh is ttencoipor of het hdicoro exlpsu, romf crtntainulaerivr purrtue coansdeyr ot mrlnaige iarxmt hhrreomgea tno a eslpbiso nsawre?

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whoissaad  eys asme tsue,inoq ohtb heoaniyttrp and tnlriiuaretvarcn mgraeehom cna rcocu deu to ihgh eoygxn l.e.sevl +
cienfuegos  I ntseakyiml hecso odiochr eusplx ,oot absed no kiiw messe itsh is otsm ocmmon eucas of VHI in trem tinnaf:s IHV ni the pemrtre inrab uslyalu seiras mfro the rmiageln imatxr wareshe VIH in the mrte nanitfs iingtreoas fmor eht rdcoiho eu.slpx oe,Hevwr ti si clpiuaarrylt mconmo ni eetaurmpr infsant or tehos fo vrey wol itrhb t.geh.iw. otMs trnclatiaurveinr grhomesreah crouc in het rsitf 72 sruho atfre hi.rbt heT irsk is ensiacrde iwht use of rteprrexaacolo nbmaerme eogtoinynax in rertepm nsni fta.nra#t/egsa/emeliuhtaoagisreewri:ririkve./tiaBIhpwoptkdnrin.cb_/h +
burak  hcrdoio lspexu is nffrieetd nhta alnmeigr riatmx +
meryen13  ilertan rheahrmeog is mero mcnoom ttah IVH vnee if ouy kinth htat it dcoul mgaeda odohcri pcasle raeyosndc to larnmegi axrimt ageom. rhrhe/po86/hw1c/itbw1wnu/3n.m.il.s.ehdptbv0mg1n:4 +


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 -4  upvote downvote
submitted by โˆ—lilmonkey(63)
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onAeyn ianredg iths qnuoites

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lollll i got this right because of This is Us.

+/- alexv0815(10)

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