05 Platelet Disorders
![](https://photos.thisispiggy.com/file/wikiFiles/8ZEWR3w.jpg)
Glanzman's
![](https://photos.thisispiggy.com/file/wikiFiles/kGPUWCf.jpg)
- superficial bleeding
- nl aggregation with ristocetin test
Bernard
![](https://photos.thisispiggy.com/file/wikiFiles/BZypoMZ.jpg)
- large platelets on smear
- abnormal ristocetin assay
![](https://photos.thisispiggy.com/file/wikiFiles/3gFmTpC.jpg)
Wiskott- Aldrich
![](https://photos.thisispiggy.com/file/wikiFiles/ofJ93TG.jpg)
Acquired
- ITP
- TTP
- HUS
- DIC
- Uremia
- thrombocytopenia
- vWF
- Hayde's
ITP
![](https://photos.thisispiggy.com/file/wikiFiles/h6UEXib.jpg)
- don't live as long as they should = low number
- macrophages clear antibody bound platelets
![](https://photos.thisispiggy.com/file/wikiFiles/DZtwuP3.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/10Xrh1V.jpg)
- platelet thrombi: platelet low, coagulation factors not consumed
TTP
![](https://photos.thisispiggy.com/file/wikiFiles/XfsfewP.jpg)
- much more dangerous
- low platelets, thrombosis
- thrombus form in small vessels, consumes platelets, thrombocytopenia
![](https://photos.thisispiggy.com/file/wikiFiles/kZK9uKx.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/bsYGOM2.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/HJxht7L.jpg)
- TTP: build up of platelets and RBC, obstruction
![](https://photos.thisispiggy.com/file/wikiFiles/wu55JCZ.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/S27wjXx.jpg)
- small vessel occlusion in CNS
![](https://photos.thisispiggy.com/file/wikiFiles/2ItD73a.jpg)
- thrombi primarily made of platelets, do not consume clotting factor
![](https://photos.thisispiggy.com/file/wikiFiles/10Xrh1V.jpg)
- platelet thrombi: platelet low, coagulation factors not consumed
![](https://photos.thisispiggy.com/file/wikiFiles/GjaPpuq.jpg)
HUS
![](https://photos.thisispiggy.com/file/wikiFiles/tqcsx57.jpg)
- distinguish from TTP: no fever or CNS symptoms (TTP only with kidney)
![](https://photos.thisispiggy.com/file/wikiFiles/10Xrh1V.jpg)
- platelet thrombi: platelet low, coagulation factors not consumed
DIC
![](https://photos.thisispiggy.com/file/wikiFiles/o3zOq2u.jpg)
- both platelets and fibrin, increased PT, PTT
![](https://photos.thisispiggy.com/file/wikiFiles/ezwMHNG.jpg)
- TF activate coagulation cascade
- sepsis: high levels of cytokines and endotoxins
![](https://photos.thisispiggy.com/file/wikiFiles/XAHjUkI.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/rytAGo9.jpg)
- every blood test abnormal
![](https://photos.thisispiggy.com/file/wikiFiles/0moASbM.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/10Xrh1V.jpg)
- platelet thrombi: platelet low, coagulation factors not consumed
Uremia
![](https://photos.thisispiggy.com/file/wikiFiles/VWNk4x5.jpg)
- caused by toxins, not platelets
Thrombocytopenia
![](https://photos.thisispiggy.com/file/wikiFiles/6KjJGS4.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/DIkU16w.jpg)
Von Willebrand
![](https://photos.thisispiggy.com/file/wikiFiles/ZrgXMS5.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/brda5uv.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/U4fK4JW.jpg)
- heavy periods common early presentation
![](https://photos.thisispiggy.com/file/wikiFiles/7a9iJvd.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/sR6eZBF.jpg)
- ristocetin test normal in glanzman
- ristocetin test also abnormal in Bernard
![](https://photos.thisispiggy.com/file/wikiFiles/1BHxHbz.jpg)
Hayde's
![](https://photos.thisispiggy.com/file/wikiFiles/s4EF1vV.jpg)
- aortic stenosis: increased risks of angiodysplasia
- overactivity of ADAMST13, breaking down multimers, causing VWF to be less efficient
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