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Term:
Parent Terms Term With Siblings Child Terms
Abnormal platelet aggregation +   
Abnormal platelet granule secretion +  
Abnormal platelet membrane protein expression +   
Abnormal platelet phosphatidylserine exposure +  
Impaired clot retraction  
Platelets contain contractile proteins (actin and myosin) that induce clot retraction. As the platelets contract, they pull on the surrounding fibrin strands, squeezing serum form the mass, compacting the clot and drawing the ruptured edges of the blood vessel more closely together. Clot retraction is directly proportional to the platelet count and inversely proportional to the fibrinogen concentration.
Impaired platelet adhesion 

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