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Practica samenvatting - MLT 04

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Volledige samenvatting over alle practicalessen in MLt04 met afbeeldingen.

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Practica
Hematopoëse
= aanmaak bloedcellen (WBC/RBC) en plaatjes (T)
▪ Volwassene: beenmerg van axiale, skeletale of lange beenderen
▪ Foetus:
o 2,5 – 5 weken: dooierzak/ventraal endotheel dorsale aorta → enkel RBC
o 6 weken: lever → volledige hematopoëse
o 12 weken: beenmerg → volledige hematopoëse
▪ Bij noodzaak: milt/lever = extramedullair (op latere leeftijd)
▪ Menselijk lichaam:
o 3,8-5,8 . 1012/L RBC
o 4-10 . 109/L WBC → Verhouding RBC/WBC = 103
9
o 1,5-4,5 . 10 /L T
o Verhouding witte bloedcellen:
▪ Neutrofielen 30 – 70 %
▪ Eosinofielen 0 – 6 %
▪ Basofielen 0–2%
▪ Monocyten 0 – 10 %
▪ Lymfocyten 20 – 45 %
▪ Uitstrijkjes/kleuringen
o May Grunwals Giesma (PB+BM) → algemene beoordeling en differentiatie
o Ijzer/Berlijns blauw (BM) → vermoeden dysplasie, functioneel ijzertekort
o Myeloperoxidase kleuring (PB+BM) → classificatie acute leukemie want
kleurt enkel myeloïde cellen aan

1 De rode reeks
Erythropoëse inclusief uitrijkingsstatia
Proerythroblast = normoblast
(vaak met 2 lobjes) N/C↑
“Mickey Mouse”



Basofiele erythroblast




Polychromatische erythroblast




Orthochromatische erythroblast


Reticulocyt → polychromasie


Rode bloedcel N/C↓


Normaal: alles voor rode streep: beenmerg, alles erna: perifeer bloed
Alle gekernde voorkopers = normoblasten (alles boven rode streep)



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