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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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AF gp 271. Too hcmu gaoteyxnoni nac usaec efer idarlca amaged ldienag to ihatnpoyret fo tapiyertrum

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mmm21  yOka i mihtg eb dt,eaderr btu yhw i tcโ€™an rnddueants ttha tyhe r ksagin otuab hte nhtig ttha is agmadde ? ๐Ÿ˜‚๐Ÿ˜‚ +8
sahusema  ieySlos!ur Teh ueqsniot ssya ht"e gaol of enattrtme is hte pitroencot of ihcwh fo teh nwoligfol tse?"urtcurs fI oot chmu O2 msdgaea teh nart,ei ohw si isht etreanmtt popsueds ot eb itrctepveo ot hte a?neirt +2
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burak  they 'ntdid veig het ttnpaie i2of 1,0%0 esoiqnut sksa hte aeosrn ofr .ti but ni a yerv pidstu way +31
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soccerfan23  In oterh hr..odt.s.we iuqoetns is blslaacyi kgiasn why teyh vgea eth tpiante a fi2o fo 925-%9 anedtis of .1%00 Teh soearn si ecaseub %100 eynoxg wdluo alde to enorithyatp of prautt.imyer hTe lerwo 59-2%9 nyexog evlsle eotrcpt hte rnteia rofm agamd.e The dgirwon fo eth iuesotqn ksscu toh moi. +3
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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)

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submitted by โˆ—mcl(671)
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r"inocch ighh noyexg strtsaunaoi can asdlyreve ftefac ugln and eey etumoocs of etrmrpe nnsf.ta"i knli

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submitted by โˆ—divya(75)
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regae tihw eb.eahrrk uyt' itynrg ot ays htta ipmrrya algo of atmternet wthi nupelsptlmae o2 si to mkea seur three is on tanirel .geamda

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submitted by โˆ—ergogenic22(401)
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ywh is rnettpoioc of the ihodocr xusp,le morf lranurirctitevna uruertp denryscoa ot inlgrmae xiatmr gorrheemah ton a loebipss sr?wnae

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burak  ridhoco spxleu is netfdrief tnah negarlmi xmrati +
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 -4  upvote downvote
submitted by โˆ—lilmonkey(63)
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nenyoA rgndiae ihts usontiqe

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