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Retired NBME 23 Answers

nbme23/Block 4/Question#34 (reveal difficulty score)
A 44-year-old man who is a farmer and has ...
Area labeled โ€˜Dโ€™ ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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submitted by โˆ—mcl(671)
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To dxnaep on siht, ahohseorgapnstpo ear nolommcy esdu as cedssi,niecti adn iofcnntu yb bnnidgi saseiocenatycrlhtlee and dg""tcanaieitv ,it os to eas.kp sihT eustrls in an cesxse of ACh tnhiwi eht e,apnsys ihchw euascs gudsle eosmnydr v,(iingmot gtaensi,w ardeaihr -- acillabsy tosl fo lsud.if) heT netttrame rfo sith is lypacytil anroetpi ncnmus,naiiar(citi) dan iiramoxedlp fi( enivg ryale oeu,hgn can ctera"tva"ei the C.e)aAssh- hTe gdriaam iegvn dsoe otn wosh ,-eCashA yoln hte R-,CAh rehetroef D si hte best erasw.n

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lowyield  Aols irndcocga ot rudwol uyo ivge tipoaern efbroe leaidporxim euecbas raleodxipmi cna cause na ailiitn naboreaxetci nev(e tguohh ouy ihgmt hinkt ouy luhods ivge aridilpemox sitfr acueesb ti si imte sviest)nei +5
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fhegedus  FA 2200 paeg 142 assy opntriae is vngie fro sanmicciur ytspmoms L(ULDMB)EBS whiel xlmeipaidor si rilimaryp udes ofr the ctniicino soymmtsp fo chyseolrlistnceeaaet ion.nigpos Teh q stme ahs mcirinacus mtsposym mi(vnogti, aeiarhrd, tl,aao)nsivi os eht stbe opiton to gvei ,operaint ichwh ctsa at nricsuicam tprreceso +1

To expand further, atropine is used to reverse MUSCARINIC symptoms (i.e. "DUMBBELSS": Diarrhea, Urination, Miosis, Bradycardia, Bronchospasm, Emesis, Lacrimation, Salivation, Sweating) and it can also cross the BBB to relieve the CNS symptoms (i.e. respiratory depression, lethargy, seizures, coma). However, pralidoxime is used to reverse NICOTINIC symptoms (i.e. the neuromuscular blockade). Pralidoxime CANNOT cross the BBB and therefore cannot relieve CNS symptoms. And always give atropine before pralidoxime because pralidoxime can cause transient acetylcholinesterase inhibition, which will worsen the symptoms.

+1/- fatboyslim(118)

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submitted by โˆ—mousie(272)
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erapshotaOoghpn niinsgpoo = Aentoitd = rntApioe y(Aaiwr M orptrece rlcoe)kb = nlidaoti fo lsboionerhc

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