tipuri de anemii
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Tipuri de anemiiTRANSCRIPT
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TIPURI DE ANEMIICalin CristianaGrupa 20
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Anemia
= scaderea cantitatii de sangeFII!PAT!"!GIE# $ tul%urare &undamentala# incapacitatea sangelui de a'si
indeplini &unctia de transp(rt a 02
"A)!RAT!R# ' scaderea R)C*eritr(cite+, -%, -t*.emat(crit'rap(rtul dintre /(lumul(cupat de eritr(cite si /(lumul sanguin t(tal+ , su% /al(arile n(rmale pentru /arstasi seul respecti/
C"INIC# ' sindr(m cu simpt(mat(l(gie di/ersa care are la %a1a .ip(ia
Ta%l(ul clinic depinde de#
' m(dul de pr(ducere rapid sau lent al anemiei' capacitatea de c(mpensare a mecanismel(r .(me(sta1iei
' gradul anemiei
' se mas(ara cu aut(rul .em(gramei
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Clasi3care
m(r&(l(gica Indicii eritr(citari# 4EM */(lum eritr(citarmediu+, -EM *.em(gl(%ina eritr(citara
medie+• Anemii -ip(cr(me'Micr(citare *4EM5607, -EM528 pg+
• Anemii N(rm(cr(me'N(rm(citare *4EM60'900 7, -EM:28 pg+
• Anemii Macr(citare *4EM:900 7+
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Anemii micr(citare Au drept caracteristica pat(genica c(munade3cienta in sinte1a -% cu aparitia .ip(cr(miei; In &unctie de ni/elul de3cientei se de(se%esc#• a&ectiuni ale meta%(lismului 3erului *e; anemie
&eripri/a, anemie cr(nica simpla'in7amatii cr(nice,in&ectii cr(nice, tum(ra, insu3cienta renala+
• %(li ale sinte1ei m(leculel(r de gl(%ina *e;.em(gl(%in(patii, talasemii+
• %(li ale sinte1ei de .em si p(r3rina *anemiisider(%lastice'%(ala in care madu/a (s(asa pr(duceeritr(%laste nucleate an(rmale cu granule de 3eracumulate in mit(c(ndriile perinucleare'sider(%lastiinelari+
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Anemia n(rm(citara• <angerare recenta
• Insu3cienta medulara *apla1ie medulara,in3ltrare medulara cu celule an(rmale3%r(1a+
• Anemie .em(litica *determina scadereare1istentei .ematiil(r, ele se rup us(r candtra/ersea1a capilarele, in special la ni/el splenic,
e; s&er(cit(1a ereditara, siclemie'anemiedrepan(citara, eritr(%last(1a &etala+
• Anemie cr(nica simpla *in7amatii cr(nice, in&ectiicr(nice, tum(ra, insu3cienta renala+
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Anemie macr(citara• Anemia megal(%lastica *de3cienta de acid &(lic, c(%alamina+
• C(%alamina si acidul &(lic sunt esentiale pentru sinte1a ADN'ului,3ecare 3ind implicata in &(rmarea timidin tri&(s&atului, una dinc(mp(nentele esentiale ale ADN'ului
• "ipsa l(r determina pr(ducerea unui ADN an(rmal si diminuat
cantitati/=: maturare nucleara insu3cienta si ( reducere adi/i1iunii celulare
• Incapacitatea de pr(li&erare rapida a celulel(r eritr(%lastice alemadu/ei (s(ase determina pr(ducerea pre&erentiala a un(r.ematii mai mari decat celulele n(rmale= macr(cite
• Macr(citele au ( mem%rana celulara su%tire, sunt /(lumin(ase siau ( &(rma neregulata (/ala, in l(cul celei de disc %ic(nca/
• In circulatie macr(citele transp(rta n(rmal (igenul, dar din cau1a&ragilitatii au ( /iata scurta
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Clasi3care
31i(pat(l(gicaIndice de pr(ductie * Ip+ = > Rt -t real 9
-t ideal 2Rt=reticul(cite
-t=.emat(crit
• Anemii -ip(regenerati/e *cau1a centrala+
I;P52
• Anemii -iperregenerati/e *cau1a peri&erica+I;P:?
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Cau1a centrala
• apla1ie medulara
• disl(care medulara
• .ip(pr(ductie prin carenta de Fe
%i(catali1at(ri• miel(displa1ie
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Cau1a peri&erica
• .em(ragii acute
• anemii .em(litice' cau1a intra c(rpusculara*ereditare+ sau cau1a etra c(rpusculara
*aut('imuna, in&ecti(asa+