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Retired NBME 19 Answers

nbme19/Block 3/Question#22 (reveal difficulty score)
Blood gas values: arterial O2 ...
Anemia 🔍 / 📺 / 🌳 / 📖
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submitted by cassdawg(1781)
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ihsT is ym sebt rteintepitoarn thwi a roceus dan phaaprgar mrfo eht uoscer ies:dlt

nI mainea, hnbgeooilm allbiavae is ceeseddar. ihTs csause dareecesd egxoyn ndbigin, nad iuamlleytt slse gyonxe si albliaave rof rlaesee noto .sestsiu

  • aO2P liwl eb lanhs-irmo baeecsu eth itarrale bolod wlil tllsi aielubqeirt ni hte usngl vene thhoug eth hibngeooml indginb si ddecrease tnhk(i fo CO inoinsgpo herwe OaP2 lsoko mronl).a
  • rarilAet O2 tocntne si uaacyllt reeeacdds auesebc htree is less gneyxo ltoat laaivbale ss(le oieobmhlng obndu ot nygeox)
  • edixM ueonsv 2O tnentco )%( si aceseerdd rfo a imliasr raeson and osla for teh aresno ietdsl lboew
  • oseuVn O2P is sllithyg eeseadcrd aesebuc hreet is herigh gxoeyn aicoxnertt ta iusetss deu to eht opsoeatynrcm nsheaimcsm omfr lsse lttoa O2 ibneg vredeleid dna ssle O2 ibnge dleadnou sniec( eehtr is lses ighnelmboa odunb O2 ni het sfirt eaclp ni eamia)n
  • OCP2 is sarilm-ohn rfo amsilri aeosrsn ot eht rifst uebtll

eT"h auylcricrot smdtausjnet ni rsoepsne to meaani wlli eb iialrms to osteh fo eth ncrgpeedi .aces In reodr ot aanitmni ietsus nogexy ipncnsooutm ta lsieneab slleve sctdaoiaes wthi a almrno egoyxn rnircagy ypicacat of lb,odo eht dtcenoriu in oxyegn relviyde lwil dale ot na scereian ni cayplaril ounr,fpsie dna oyxgne ctenraixto iwll an.erceis rtrreloaAi iontdial and sovtciysi oednrcuit rfo( teh easc of a nticdeoru in tc)H lwil ecusa blodo flwo and xonyge edivlyer to ras.eceni tBoh gnexoy taenxcitor adn nxogye rldeeyvi illw ctuneion ot escnarei nuilt hte exgnoy utnrseeerqmi of eht sesisut era tme ro ltniu eht icacapyt to arenecis goynex ixtnatreoc dan ylevreid ash nebe ecde.hra The nreulgsit uiaotnist si oen ni hwchi ounevs gnyexo onctnet and PO2v rea lses than rmno.la ciSen OP2a si mlraon ofr lal het miaenc ontussaiti orcnedd,sei tish etdfce is otn esedsn by the ypiarrorset meccteoshro.rpe ,uhsT rsinigcnae het iseidprn gyoxen fiontarc is ont ehulpfl ceextp ofr eth csae fo CO osnoiig,np hreew ighh epsiridn ygeoxn ..(,ge 10%0 xoynge ta niebtma imarocterb urpseser ro enpmealtc fo eht besutjc tnio a baheyicrrp rcbahe)m tceemsop thiw CO nibignd ta het emhe seit rlc(eal lHa'nadse fistr w.la)" - iw/Nn.glsmoKv:.t1ci/p.honb5ns/1kwt.whB/o/34b

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blueberriesyum  Aso,l ni fitrs aid ersiptroray prcteah ofr emnaia ti as,ys Hb cocn si ,olw O2% tas is loa,mrn issdledov negxyo )2(POa si manlro, but total 2O teonnct si owl. lToat eygnox tnnecto si hte msu fo ogexny oudbn ot Hb and dvsdieslo oxyn.ge F(A 0128 pg 496) +1



 +2  upvote downvote
submitted by an_improved_me(91)
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Alos, to iitemnlea the othre :opinsto

yetliaHponitonlv doluw vhea an rieencdas pC2O dna dsaedceer Op.2

Hgih ttdiluae uoldw heva wlo P,2O wlo C2pO ielnap(Hoetnity)rlv

VQ/ aimcshtm duwlo lsao vaeh a wol 2Op and ighh p2OC, sienc assge ear hgg.acnnxie

nitplHrnoileveayt dlwou heav a nromla 2OP nda owl PC2O

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