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samenvatting bloedstolling tabelvorm

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samenvatting bloedstolling tabelvorm Prof. Dr. Katrien De Vreese

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January 29, 2025
Number of pages
21
Written in
2024/2025
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Sv BLOEDSTOLLING – Prof. dr. Katrien Devreese
HEMOSTASE (herhaling)
Vasoconstrictie Transiënte vasoconstrictie thv
endotheelletsel zodat bloedflow
vermindert




Primaire hemostase  Trombocyten interactie met
beschadigd endotheel
 Primaire hemostatische plug
stopt bloeding
 Rol van von Willebrand Factor
 Primaire hemostatische plug
= fragiel en valt gemakkelijk uit
elkaar
Secundaire  Vorming van onoplosbare
hemostase fibrinedraden
 Secundaire hemostatische
plug = stabiele plug
 Rol van stollingsfactoren in de
stollingscascade: interageren
met elkaar en met de
plaatjesplug
Antistolling en  Anticoagulatie: trombomoduline
fibrinolyse (proteïne C systeem),
antitrombine
 Als de clot gevormd is, wordt de
clot gelyseerd (tissue
plasminogen activator en
plasmine) om occlusie van het
bloedvat te voorkomen
Primaire hemostase
Trombocyten




1

, - Glycoproteïne receptoren
- Collageenreceptoren
- ADP-receptoren




Von Willebrand factor  Binding aan collageen
 Adhesie van trombocyten
 Aggregatie van trombocyten
rol in primaire trombusvorming
Rol in secundaire hemostase:
 Bindt en stabiliseert FVIII in de circulatie
tekort aan VWF veroorzaakt een secundaire deficiëntie FVIII
Stollingsfactoren




2

, Stollingscascade




Intrinsic




Weefselschade




Weefselbeschadiging:
- Vrijstelling TF: activatie trombine, eindproduct
fibrinedraden
- Vrijstelling DNA, RNA, polyfosfaten: triggers van intrinsic
systeem: FXII activeert FXI



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